Lockheed Martin F-35 Lightning II

"F35" redirects here. For other uses, see F35 (disambiguation).

The Lockheed Martin F-35 Lightning II is an American family of single-seat, single-engine, supersonic stealth strike fighters. A multirole combat aircraft designed for both air superiority and strike missions, it also has electronic warfare and intelligence, surveillance, and reconnaissance capabilities. Lockheed Martin is the prime F-35 contractor with principal partners Northrop Grumman and BAE Systems. The aircraft has three main variants: the conventional takeoff and landing (CTOL) F-35A, the short take-off and vertical-landing (STOVL) F-35B, and the carrier variant (CV) catapult-assisted take-off but arrested recovery (CATOBAR) F-35C.

F-35 Lightning II
U.S. Air Force F-35A in flight over the coast of Florida
General information
Type	Multirole strike fighter
National origin	United States
Manufacturer	Lockheed Martin
Status	In service
Primary users	United States Air Force (USAF) United States Navy (USN) United States Marine Corps (USMC) See Operators section for others
Number built	1,000 as of January 2024[update][1]
History
Manufactured	2006–present
Introduction date	F-35B: 31 July 2015 (USMC)[2] F-35A: 2 August 2016 (USAF)[3] F-35C: 28 February 2019 (USN)[4]
First flight	15 December 2006; 18 years ago (2006-12-15) (F-35A)
Developed from	Lockheed Martin X-35

The aircraft descends from the Lockheed Martin X-35, which in 2001 beat the Boeing X-32 to win the Joint Strike Fighter (JSF) program intended to replace the F-16, F/A-18, and the Harrier jump jet, among others. Its development is principally funded by the United States, with additional funding from program partner countries from the North Atlantic Treaty Organization (NATO) and close U.S. allies, including Australia, Canada, Denmark, Italy, the Netherlands, Norway, the United Kingdom, and formerly Turkey.^[5][6][7] Several other countries have also ordered, or are considering ordering, the aircraft. The program has drawn criticism for its unprecedented size, complexity, ballooning costs, and delayed deliveries.^{[8][N 1]} The acquisition strategy of concurrent production of the aircraft while it was still in development and testing led to expensive design changes and retrofits.^[10][11] As of July 2024^[update], the average flyaway costs per plane are: US$82.5 million for the F-35A, $109 million for the F-35B, and $102.1 million for the F-35C.^[12]

The F-35 first flew in 2006 and entered service with the U.S. Marine Corps F-35B in July 2015, followed by the U.S. Air Force F-35A in August 2016 and the U.S. Navy F-35C in February 2019.^[2][3][4] The aircraft was first used in combat in 2018 by the Israeli Air Force.^[13] The U.S. plans to buy 2,456 F-35s through 2044, which will represent the bulk of the crewed tactical aviation of the U.S. Air Force, Navy, and Marine Corps for several decades; the aircraft is planned to be a cornerstone of NATO and U.S.-allied air power and to operate to 2070.^[14][15][16]

Development

Main article: Lockheed Martin F-35 Lightning II development

Program origins

The F-35 was the product of the Joint Strike Fighter (JSF) program, which was the merger of various combat aircraft programs from the 1980s and 1990s. One progenitor program was the Defense Advanced Research Projects Agency (DARPA) Advanced Short Take-Off/Vertical Landing (ASTOVL) which ran from 1983 to 1994; ASTOVL aimed to develop a Harrier jump jet replacement for the U.S. Marine Corps (USMC) and the UK Royal Navy. Under one of ASTOVL's classified programs, the Supersonic STOVL Fighter (SSF), Lockheed Skunk Works conducted research for a stealthy supersonic STOVL fighter intended for both U.S. Air Force (USAF) and USMC; among key STOVL technologies explored was the shaft-driven lift fan (SDLF) system. Lockheed's concept was a single-engine canard delta aircraft weighing about 24,000 lb (11,000 kg) empty. ASTOVL was rechristened as the Common Affordable Lightweight Fighter (CALF) in 1993 and involved Lockheed, McDonnell Douglas, and Boeing.^[17][18]

The end of the Cold War and the collapse of the Soviet Union in 1991 caused considerable reductions in Department of Defense (DoD) spending and subsequent restructuring. In 1993, the Joint Advanced Strike Technology (JAST) program emerged following the cancellation of the USAF's Multi-Role Fighter (MRF) and U.S. Navy's (USN) Advanced Attack/Fighter (A/F-X) programs. MRF, a program for a relatively affordable F-16 replacement, was scaled back and delayed due to post–Cold War defense posture easing F-16 fleet usage and thus extending its service life as well as increasing budget pressure from the F-22 Advanced Tactical Fighter (ATF) program. The A/F-X, initially known as the Advanced-Attack (A-X), began in 1991 as the USN's follow-on to the Advanced Tactical Aircraft (ATA) program for an A-6 replacement; the ATA's resulting A-12 Avenger II had been canceled due to technical problems and cost overruns in 1991. In the same year, the termination of the Naval Advanced Tactical Fighter (NATF), a naval development of USAF's ATF program to replace the F-14, resulted in additional fighter capability being added to A-X, which was then renamed A/F-X. Amid increased budget pressure, the DoD's Bottom-Up Review (BUR) in September 1993 announced MRF's and A/F-X's cancellations, with applicable experience brought to the emerging JAST program.^[18] JAST was not meant to develop a new aircraft, but rather to develop requirements, mature technologies, and demonstrate concepts for advanced strike warfare.^[19]

As JAST progressed, the need for concept demonstrator aircraft by 1996 emerged, which would coincide with the full-scale flight demonstrator phase of ASTOVL/CALF. Because the ASTOVL/CALF concept appeared to align with the JAST charter, the two programs were eventually merged in 1994 under the JAST name, with the program now serving the USAF, USMC, and USN.^[19] JAST was subsequently renamed to Joint Strike Fighter (JSF) in 1995, with STOVL submissions by McDonnell Douglas, Northrop Grumman, Lockheed Martin,^{[N 2]} and Boeing. The JSF was expected to eventually replace large numbers of multi-role and strike fighters in the inventories of the US and its allies, including the Harrier, F-16, F/A-18, A-10, and F-117.^[20]

International participation is a key aspect of the JSF program, starting with United Kingdom participation in the ASTOVL program. Many international partners requiring modernization of their air forces were interested in the JSF. The United Kingdom joined JAST/JSF as a founding member in 1995 and thus became the only Tier 1 partner of the JSF program;^[21] Italy, the Netherlands, Denmark, Norway, Canada, Australia, and Turkey joined the program during the Concept Demonstration Phase (CDP), with Italy and the Netherlands being Tier 2 partners and the rest Tier 3. Consequently, the aircraft was developed in cooperation with international partners and available for export.^[22]

JSF competition

Main articles: Joint Strike Fighter program and Lockheed Martin X-35

Boeing and Lockheed Martin were selected in early 1997 for CDP, with their concept demonstrator aircraft designated X-32 and X-35 respectively; the McDonnell Douglas team was eliminated and Northrop Grumman and British Aerospace joined the Lockheed Martin team. Each firm would produce two prototype air vehicles to demonstrate conventional takeoff and landing (CTOL), carrier takeoff and landing (CV), and STOVL.^{[N 3]} Lockheed Martin's design would make use of the work on the SDLF system conducted under the ASTOVL/CALF program. The key aspect of the X-35 that enabled STOVL operation, the SDLF system consists of the lift fan in the forward center fuselage that could be activated by engaging a clutch that connects the driveshaft to the turbines and thus augmenting the thrust from the engine's swivel nozzle. Research from prior aircraft incorporating similar systems, such as the Convair Model 200,^{[N 4]} Rockwell XFV-12, and Yakovlev Yak-141, were also taken into consideration.^[24][25][26] By contrast, Boeing's X-32 employed direct lift system that the augmented turbofan would be reconfigured to when engaging in STOVL operation.

X-35B flying over Edwards Air Force Base

Lockheed Martin's commonality strategy was to replace the STOVL variant's SDLF with a fuel tank and the aft swivel nozzle with a two-dimensional thrust vectoring nozzle for the CTOL variant.^{[N 5]} STOVL operation is made possible through a patented shaft-driven LiftFan propulsion system.^[27] This would enable identical aerodynamic configuration for the STOVL and CTOL variants, while the CV variant would have an enlarged wing to reduce landing speed for carrier recovery. Due to aerodynamic characteristics and carrier recovery requirements from the JAST merger, the design configuration settled on a conventional tail compared to the canard delta design from the ASTOVL/CALF; notably, the conventional tail configuration offers much lower risk for carrier recovery compared to the ASTOVL/CALF canard configuration, which was designed without carrier compatibility in mind. This enabled greater commonality between all three variants, as the commonality goal was important at this design stage.^[28] Lockheed Martin's prototypes would consist of the X-35A for demonstrating CTOL before converting it to the X-35B for STOVL demonstration and the larger-winged X-35C for CV compatibility demonstration.^[29]

The X-35A first flew on 24 October 2000 and conducted flight tests for subsonic and supersonic flying qualities, handling, range, and maneuver performance.^[30] After 28 flights, the aircraft was then converted into the X-35B for STOVL testing, with key changes including the addition of the SDLF, the three-bearing swivel module (3BSM), and roll-control ducts. The X-35B would successfully demonstrate the SDLF system by performing stable hover, vertical landing, and short takeoff in less than 500 ft (150 m).^[28][31] The X-35C first flew on 16 December 2000 and conducted field landing carrier practice tests.^[30]

On 26 October 2001, Lockheed Martin was declared the winner and was awarded the System Development and Demonstration (SDD) contract; Pratt & Whitney was separately awarded a development contract for the F135 engine for the JSF.^[32] The F-35 designation, which was out of sequence with standard DoD numbering, was allegedly determined on the spot by program manager Major General Mike Hough; this came as a surprise even to Lockheed Martin, which had expected the F-24 designation for the JSF.^[33]

Design and production

An F-35 wind tunnel testing model in 16-foot (5 m) transonic wind tunnel at the Arnold Engineering Development Center

As the JSF program moved into the System Development and Demonstration phase, the X-35 demonstrator design was modified to create the F-35 combat aircraft. The forward fuselage was lengthened by 5 inches (13 cm) to make room for mission avionics, while the horizontal stabilizers were moved 2 inches (5.1 cm) aft to retain balance and control. The diverterless supersonic inlet changed from a four-sided to a three-sided cowl shape and was moved 30 inches (76 cm) aft. The fuselage section was fuller, the top surface raised by 1 inch (2.5 cm) along the centerline and the lower surface bulged to accommodate weapons bays. Following the designation of the X-35 prototypes, the three variants were designated F-35A (CTOL), F-35B (STOVL), and F-35C (CV), all with a design service life of 8,000 hours. Prime contractor Lockheed Martin performs overall systems integration and final assembly and checkout (FACO) at Air Force Plant 4 in Fort Worth, Texas,^{[N 6]} while Northrop Grumman and BAE Systems supply components for mission systems and airframe.^[34][35]

Adding the systems of a fighter aircraft added weight. The F-35B gained the most, largely due to a 2003 decision to enlarge the weapons bays for commonality between variants; the total weight growth was reportedly up to 2,200 pounds (1,000 kg), over 8%, causing all STOVL key performance parameter (KPP) thresholds to be missed.^[36] In December 2003, the STOVL Weight Attack Team (SWAT) was formed to reduce the weight increase; changes included thinned airframe members, smaller weapons bays and vertical stabilizers, less thrust fed to the roll-post outlets, and redesigning the wing-mate joint, electrical elements, and the airframe immediately aft of the cockpit. The inlet was also revised to accommodate more powerful, greater mass flow engines.^[37][38] Many changes from the SWAT effort were applied to all three variants for commonality. By September 2004, these efforts had reduced the F-35B's weight by over 3,000 pounds (1,400 kg), while the F-35A and F-35C were reduced in weight by 2,400 pounds (1,100 kg) and 1,900 pounds (860 kg) respectively.^[28][39] The weight reduction work cost $6.2 billion and caused an 18-month delay.^[40]

The first F-35A prototype, AA-1, being towed to its inauguration ceremony on 7 July 2006

The first F-35A, designated AA-1, was rolled out at Fort Worth on 19 February 2006 and first flew on 15 December 2006 with chief test pilot Jon S. Beesley at the controls.^{[N 7][41]} In 2006, the F-35 was given the name "Lightning II" after the Lockheed P-38 Lightning of World War II.^[42] Some USAF pilots have nicknamed the aircraft "Panther" instead, and other nicknames include "Fat Amy" and "Battle Penguin".^[43][44][45]

The aircraft's software was developed as six releases, or Blocks, for SDD. The first two Blocks, 1A and 1B, readied the F-35 for initial pilot training and multi-level security. Block 2A improved the training capabilities, while 2B was the first combat-ready release planned for the USMC's Initial Operating Capability (IOC). Block 3i retains the capabilities of 2B while having new Technology Refresh 2 (TR-2) hardware and was planned for the USAF's IOC. The final release for SDD, Block 3F, would have full flight envelope and all baseline combat capabilities. Alongside software releases, each block also incorporates avionics hardware updates and air vehicle improvements from flight and structural testing.^[46] In what is known as "concurrency", some low rate initial production (LRIP) aircraft lots would be delivered in early Block configurations and eventually upgraded to Block 3F once development is complete.^[47] After 17,000 flight test hours, the final flight for the SDD phase was completed in April 2018.^[48] Like the F-22, the F-35 has been targeted by cyberattacks and technology theft efforts, as well as potential vulnerabilities in the integrity of the supply chain.^[49][50][51]

The first F-35C flight sciences aircraft, CF-01, conducts a test flight over Chesapeake Bay in February 2011.

Testing found several major problems: early F-35B airframes were vulnerable to premature cracking,^{[N 8]} the F-35C arrestor hook design was unreliable, fuel tanks were too vulnerable to lightning strikes, the helmet display had problems, and more. Software was repeatedly delayed due to its unprecedented scope and complexity. In 2009, the DoD Joint Estimate Team (JET) estimated that the program was 30 months behind the public schedule.^[52][53] In 2011, the program was "re-baselined"; that is, its cost and schedule goals were changed, pushing the IOC from the planned 2010 to July 2015.^[54][55] The decision to simultaneously test, fix defects, and begin production was criticized as inefficient; in 2014, Under Secretary of Defense for Acquisition Frank Kendall called it "acquisition malpractice".^[56] The three variants shared just 25% of their parts, far below the anticipated commonality of 70%.^[57]

The program received considerable criticism for cost overruns and for the total projected lifetime cost, as well as quality management shortcomings by contractors.^[58][59] As of August 2023^[update], the program was 80% over budget and 10 years late.^[60]

The JSF program was expected to cost about $200 billion for acquisition in base-year 2002 dollars when SDD was awarded in 2001.^[61][62] As early as 2005, the Government Accountability Office (GAO) had identified major program risks in cost and schedule.^[63] The costly delays strained the relationship between the Pentagon and contractors.^[64] By 2017, delays and cost overruns had pushed the F-35 program's expected acquisition costs to $406.5 billion, with total lifetime cost (i.e., to 2070) to $1.5 trillion in then-year dollars which also includes operations and maintenance.^[65][66][67] The F-35A's unit cost (not including engine) for LRIP Lot 13 was $79.2 million in base-year 2012 dollars.^[68] Delays in development and operational test and evaluation, including integration into the Joint Simulation Environment, pushed full-rate production decision from the end of 2019 to March 2024, although actual production rate had already approached the full rate by 2020; the combined full rate at the Fort Worth, Italy, and Japan FACO plants is 156 aircraft annually.^[69][70]

Upgrades and further development

Sailors prepare to taxi an F-35C Lightning II on aircraft carrier USS Carl Vinson.

The F-35 is expected to be continually upgraded over its lifetime. The first combat-capable Block 2B configuration, which had basic air-to-air and strike capabilities, was declared ready by the USMC in July 2015.^[2] The Block 3F configuration began operational test and evaluation (OT&E) in December 2018 and its completion in late 2023 concluded SDD in March 2024.^[71] The F-35 program is also conducting sustainment and upgrade development, with early aircraft from LRIP lot 2 onwards gradually upgraded to the baseline Block 3F standard by 2021.^{[72][needs update]}

With Block 3F as the final build for SDD, the first major upgrade program is Block 4 which began development in 2019 and was initially captured under the Continuous Capability Development and Delivery (C2D2) program. Block 4 is expected to enter service in incremental steps from the late 2020s to early 2030s and integrates additional weapons, including those unique to international customers, improved sensor capabilities including the new AN/APG-85 AESA radar and additional ESM bandwidth, and adds Remotely Operated Video Enhanced Receiver (ROVER) support.^[73][74] C2D2 also places greater emphasis on agile software development to enable quicker releases.^[75]

The key enabler of Block 4 is Technology Refresh 3 (TR-3) avionics hardware, which consists of new display, core processor, and memory modules to support increased processing requirements, as well as engine upgrade that increases the amount of cooling available to support the additional mission systems. The engine upgrade effort explored both improvements to the F135 as well as significantly more power and efficient adaptive cycle engines. In 2018, General Electric and Pratt & Whitney were awarded contracts to develop adaptive cycle engines for potential application in the F-35,^{[N 9]} and in 2022, the F-35 Adaptive Engine Replacement program was launched to integrate them.^[76][77] However, in 2023 the USAF chose an improved F135 under the Engine Core Upgrade (ECU) program over an adaptive cycle engine due to cost as well as concerns over risk of integrating the new engine, initially designed for the F-35A, on the B and C.^[78] Difficulties with the new TR-3 hardware, including regression testing, have caused delays to Block 4 as well as a halt in aircraft deliveries from July 2023 to July 2024.^[79][80]

Defense contractors have offered upgrades to the F-35 outside of official program contracts. In 2013, Northrop Grumman disclosed its development of a directional infrared countermeasures suite, named Threat Nullification Defensive Resource (ThNDR). The countermeasure system would share the same space as the Distributed Aperture System (DAS) sensors and acts as a laser missile jammer to protect against infrared-homing missiles.^[81]

Israel operates a unique subvariant of the F-35A, designated the F-35I, that is designed to better interface with and incorporate Israeli equipment and weapons. The Israeli Air Force also has their own F-35I test aircraft that provides more access to the core avionics to include their own equipment.^[82]

Procurement and international participation

Main article: Lockheed Martin F-35 Lightning II procurement

The United States is the primary customer and financial backer, with planned procurement of 1,763 F-35As for the USAF, 353 F-35Bs and 67 F-35Cs for the USMC, and 273 F-35Cs for the USN.^[14] Additionally, the United Kingdom, Italy, the Netherlands, Turkey, Australia, Norway, Denmark and Canada have agreed to contribute US$4.375 billion towards development costs, with the United Kingdom contributing about 10% of the planned development costs as the sole Tier 1 partner.^[21] The initial plan was that the U.S. and eight major partner countries would acquire over 3,100 F-35s through 2035.^[83] The three tiers of international participation generally reflect financial stake in the program, the amount of technology transfer and subcontracts open for bid by national companies, and the order in which countries can obtain production aircraft.^[84] Alongside program partner countries, Israel and Singapore have joined as Security Cooperative Participants (SCP).^[85][86][87] Sales to SCP and non-partner states, including Belgium, Japan, and South Korea, are made through the Pentagon's Foreign Military Sales program.^[7][88] Turkey was removed from the F-35 program in July 2019 over security concerns following its purchase of a Russian S-400 surface-to-air missile system.^{[89][90][N 10]}

As of July 2024^[update], the average flyaway costs per plane are: $82.5 million for the F-35A, $109 million for the F-35B, and $102.1 million for the F-35C.^[12]

Design

Overview

The F-35 is a family of single-engine, supersonic, stealth multirole strike fighters.^[92] The second fifth-generation fighter to enter US service and the first operational supersonic STOVL stealth fighter, the F-35 emphasizes low observables, advanced avionics and sensor fusion that enable a high level of situational awareness and long range lethality;^[93][94][95] the USAF considers the aircraft its primary strike fighter for conducting suppression of enemy air defense (SEAD) and air interdiction missions, owing to the advanced sensors and mission systems.^[96]

(From the top) F-35A of the 33rd FW, F-35B of VMFAT-501 and F-35C of VFA-101 near Eglin AFB, 2014

A vortex forms around the body of the aircraft.

The F-35 has a wing-tail configuration with two vertical stabilizers canted for stealth. Flight control surfaces include leading-edge flaps, flaperons,^{[N 11]} rudders, and all-moving horizontal tails (stabilators); leading edge root extensions or chines^[97] also run forwards to the inlets. The relatively short 35-foot wingspan of the F-35A and F-35B is set by the requirement to fit inside USN amphibious assault ship parking areas and elevators; the F-35C's larger wing is more fuel efficient.^[98][99] The fixed diverterless supersonic inlets (DSI) use a bumped compression surface and forward-swept cowl to shed the boundary layer of the forebody away from the inlets, which form a Y-duct for the engine.^[100] Structurally, the F-35 drew upon lessons from the F-22; composites comprise 35% of airframe weight, with the majority being bismaleimide and composite epoxy materials as well as some carbon nanotube-reinforced epoxy in later production lots.^{[101][102][103]} The F-35 is considerably heavier than the lightweight fighters it replaces, with the lightest variant having an empty weight of 29,300 lb (13,300 kg); much of the weight can be attributed to the internal weapons bays and the extensive avionics carried.^[104]

While lacking the kinematic performance of the larger twin-engine F-22, the F-35 is competitive with fourth-generation fighters such as the F-16 and F/A-18, especially when they carry weapons because the F-35's internal weapons bay eliminates drag from external stores.^[105] All variants have a top speed of Mach 1.6, attainable with full internal payload. The Pratt & Whitney F135 engine gives good subsonic acceleration and energy, with supersonic dash in afterburner. The F-35, while not a "supercruising" aircraft, can fly at Mach 1.2 for a dash of 150 miles (240 km) with afterburners. This ability can be useful in battlefield situations.^[106] The large stabilitors, leading edge extensions and flaps, and canted rudders provide excellent high alpha (angle-of-attack) characteristics, with a trimmed alpha of 50°. Relaxed stability and triplex-redundant fly-by-wire controls provide excellent handling qualities and departure resistance.^[107][108] Having over double the F-16's internal fuel, the F-35 has a considerably greater combat radius, while stealth also enables a more efficient mission flight profile.^[109]

Sensors and avionics

The AN/AAQ-40 Electro-Optical Target System (EOTS) under the nose of an F-35A

The F-35's mission systems are among the most complex aspects of the aircraft. The avionics and sensor fusion are designed to improve the pilot's situational awareness and command-and-control capabilities and facilitate network-centric warfare.^[92][110] Key sensors include the Northrop Grumman AN/APG-81 active electronically scanned array (AESA) radar, BAE Systems AN/ASQ-239 Barracuda electronic warfare system, Northrop Grumman/Raytheon AN/AAQ-37 Electro-optical Distributed Aperture System (DAS), Lockheed Martin AN/AAQ-40 Electro-Optical Targeting System (EOTS) and Northrop Grumman AN/ASQ-242 Communications, Navigation, and Identification (CNI) suite. The F-35 was designed for its sensors to work together to provide a cohesive image of the local battlespace; for example, the APG-81 radar also acts as a part of the electronic warfare system.^[111]

Much of the F-35's software was developed in C and C++ programming languages, while Ada83 code from the F-22 was also used; the Block 3F software has 8.6 million lines of code.^[112][113] The Green Hills Software Integrity DO-178B real-time operating system (RTOS) runs on integrated core processors (ICPs); data networking includes the IEEE 1394b and Fibre Channel buses.^[114][115] The avionics use commercial off-the-shelf (COTS) components when practical to make upgrades cheaper and more flexible; for example, to enable fleet software upgrades for the software-defined radio (SDR) systems.^{[116][117][118]} The mission systems software, particularly for sensor fusion, was one of the program's most difficult parts and responsible for substantial program delays.^{[N 12][120][121]}

AN/APG-81 AESA radar antenna

The APG-81 radar uses electronic scanning for rapid beam agility and incorporates passive and active air-to-air modes, strike modes, and synthetic aperture radar (SAR) capability, with multiple target track-while-scan at ranges in excess of 80 nmi (150 km). The antenna is tilted backwards for stealth.^[122] Complementing the radar is the AAQ-37 DAS, which consists of six infrared sensors that provide all-aspect missile launch warning and target tracking; the DAS acts as a situational awareness infrared search-and-track (SAIRST) and gives the pilot spherical infrared and night-vision imagery on the helmet visor.^[123] The ASQ-239 Barracuda electronic warfare system has ten radio frequency antennas embedded into the edges of the wing and tail for all-aspect radar warning receiver (RWR). It also provides sensor fusion of radio frequency and infrared tracking functions, geolocation threat targeting, and multispectral image countermeasures for self-defense against missiles. The electronic warfare system can detect and jam hostile radars.^[124] The AAQ-40 EOTS is mounted behind a faceted low-observable window under the nose and performs laser targeting, forward-looking infrared (FLIR), and long range IRST functions.^[125] The ASQ-242 CNI suite uses a half dozen physical links, including the directional Multifunction Advanced Data Link (MADL), for covert CNI functions.^[126][127] Through sensor fusion, information from radio frequency receivers and infrared sensors are combined to form a single tactical picture for the pilot. The all-aspect target direction and identification can be shared via MADL to other platforms without compromising low observability, while Link 16 enables communication with older systems.^[128]

The F-35 was designed to accept upgrades to its processors, sensors, and software over its lifespan. Technology Refresh 3, which includes a new core processor and a new cockpit display, is planned for Lot 15 aircraft.^[129] Lockheed Martin has offered the Advanced EOTS for the Block 4 configuration; the improved sensor fits into the same area as the baseline EOTS with minimal changes.^[130] In June 2018, Lockheed Martin picked Raytheon for improved DAS.^[131] The USAF has studied the potential for the F-35 to orchestrate attacks by unmanned combat aerial vehicles (UCAVs) via its sensors and communications equipment.^[132]

A new radar called the AN/APG-85 is planned for Block 4 F-35s.^[133] According to the JPO, the new radar will be compatible with all three major F-35 variants. However, it is unclear if older aircraft will be retrofitted with the new radar.^[133]

Stealth and signatures

The sawtooth design on the landing gear door and access panels

Stealth is a key aspect of the F-35's design, and radar cross-section (RCS) is minimized through careful shaping of the airframe and the use of radar-absorbent materials (RAM); visible measures to reduce RCS include alignment of edges and continuous curvature of surfaces, serration of skin panels, and the masking of the engine face and turbine. Additionally, the F-35's diverterless supersonic inlet (DSI) uses a compression bump and forward-swept cowl rather than a splitter gap or bleed system to divert the boundary layer away from the inlet duct, eliminating the diverter cavity and further reducing radar signature.^[100][134] The RCS of the F-35 has been characterized as lower than a metal golf ball at certain frequencies and angles; in some conditions, the F-35 compares favorably to the F-22 in stealth.^{[135][136][137]} For maintainability, the F-35's stealth design took lessons from earlier stealth aircraft such as the F-22; the F-35's radar-absorbent fibermat skin is more durable and requires less maintenance than older topcoats.^[138] The aircraft also has reduced infrared and visual signatures as well as strict controls of radio frequency emitters to prevent their detection.^{[139][140][141]} The F-35's stealth design is primarily focused on high-frequency X-band wavelengths;^[142] low-frequency radars can spot stealthy aircraft due to Rayleigh scattering, but such radars are also conspicuous, susceptible to clutter, and lack precision.^{[143][144][145]} To disguise its RCS, the aircraft can mount four Luneburg lens reflectors.^[146]

Noise from the F-35 caused concerns in residential areas near potential bases for the aircraft, and residents near two such bases—Luke Air Force Base, Arizona, and Eglin Air Force Base (AFB), Florida—requested environmental impact studies in 2008 and 2009 respectively.^[147] Although the noise levels, in decibels, were comparable to those of prior fighters such as the F-16, the F-35's sound power is stronger—particularly at lower frequencies.^[148] Subsequent surveys and studies have indicated that the noise of the F-35 was not perceptibly different from the F-16 and F/A-18E/F, though the greater low-frequency noise was noticeable for some observers.^{[149][150][151]}

Cockpit

F-35 cockpit simulator

The glass cockpit was designed to give the pilot good situational awareness. The main display is a 20-by-8-inch (50 by 20 cm) panoramic touchscreen, which shows flight instruments, stores management, CNI information, and integrated caution and warnings; the pilot can customize the arrangement of the information. Below the main display is a smaller stand-by display.^[152] The cockpit has a speech-recognition system developed by Adacel.^[153] The F-35 does not have a head-up display; instead, flight and combat information is displayed on the visor of the pilot's helmet in a helmet-mounted display system (HMDS).^[154] The one-piece tinted canopy is hinged at the front and has an internal frame for structural strength. The Martin-Baker US16E ejection seat is launched by a twin-catapult system housed on side rails.^[155] There is a right-hand side stick and throttle hands-on throttle-and-stick system. For life support, an onboard oxygen-generation system (OBOGS) is fitted and powered by the Integrated Power Package (IPP), with an auxiliary oxygen bottle and backup oxygen system for emergencies.^[156]

The F-35's helmet-mounted display system

The Vision Systems International^{[N 13]} helmet display is a key piece of the F-35's human-machine interface. Instead of the head-up display mounted atop the dashboard of earlier fighters, the HMDS puts flight and combat information on the helmet visor, allowing the pilot to see it no matter which way they are facing.^[157] Infrared and night vision imagery from the Distributed Aperture System can be displayed directly on the HMDS and enables the pilot to "see through" the aircraft. The HMDS allows an F-35 pilot to fire missiles at targets even when the nose of the aircraft is pointing elsewhere by cuing missile seekers at high angles off-boresight.^[158][159] Each helmet costs $400,000.^[160] The HMDS weighs more than traditional helmets, and there is concern that it can endanger lightweight pilots during ejection.^[161]

Due to the HMDS's vibration, jitter, night-vision and sensor display problems during development, Lockheed Martin and Elbit issued a draft specification in 2011 for an alternative HMDS based on the AN/AVS-9 night vision goggles as backup, with BAE Systems chosen later that year.^[162][163] A cockpit redesign would be needed to adopt an alternative HMDS.^[164][165] Following progress on the baseline helmet, development on the alternative HMDS was halted in October 2013.^[166][167] In 2016, the Gen 3 helmet with improved night vision camera, new liquid crystal displays, automated alignment and software enhancements was introduced with LRIP lot 7.^[166]

Armament

F-35A with all weapon bay doors open

To preserve its stealth shaping, the F-35 has two internal weapons bays each with two weapons stations. The two outboard weapon stations each can carry ordnance up to 2,500 lb (1,100 kg), or 1,500 lb (680 kg) for the F-35B, while the two inboard stations carry air-to-air missiles. Air-to-surface weapons for the outboard station include the Joint Direct Attack Munition (JDAM), Paveway series of bombs, Joint Standoff Weapon (JSOW), and cluster munitions (Wind Corrected Munitions Dispenser). The station can also carry multiple smaller munitions such as the GBU-39 Small Diameter Bombs (SDB), GBU-53/B SDB II, and SPEAR 3; up to four SDBs can be carried per station for the F-35A and F-35C, and three for the F-35B.^{[168][169][170]} The F-35A achieved certification to carry the B61 Mod 12 nuclear bomb in October 2023.^[171] The inboard station can carry the AIM-120 AMRAAM and eventually the AIM-260 JATM. Two compartments behind the weapons bays contain flares, chaff, and towed decoys.^[172]

An F-35A from the 4th Fighter Squadron, 388th Fighter Wing, Hill AFB, Utah, flies a strafing run at the Utah Test & Training Range in August 2018. This was the first operation use of the GAU-22/A of the F-35A aircraft.

The aircraft can use six external weapons stations for missions that do not require stealth.^[173] The wingtip pylons each can carry an AIM-9X or AIM-132 ASRAAM and are canted outwards to reduce their radar cross-section.^[174][175] Additionally, each wing has a 5,000 lb (2,300 kg) inboard station and a 2,500 lb (1,100 kg) middle station, or 1,500 lb (680 kg) for F-35B. The external wing stations can carry large air-to-surface weapons that would not fit inside the weapons bays such as the AGM-158 Joint Air to Surface Standoff Missile (JASSM) or AGM-158C LRASM cruise missile. An air-to-air missile load of eight AIM-120s and two AIM-9s is possible using internal and external weapons stations; a configuration of six 2,000 lb (910 kg) bombs, two AIM-120s and two AIM-9s can also be arranged.^{[158][176][177]} The F-35 is armed with a 25 mm GAU-22/A rotary cannon, a lighter four-barrel variant of the GAU-12/U Equalizer.^[178] On the F-35A this is mounted internally near the left wing root with 182 rounds carried;^{[citation needed]} the gun is more effective against ground targets than the 20 mm gun carried by other USAF fighters.^{[dubious – discuss][citation needed]} In 2020, a USAF report noted "unacceptable" accuracy problems with the GAU-22/A on the F-35A. These were due to "misalignments" in the gun's mount, which was also susceptible to cracking.^[179] These problems were resolved by 2024.^[180] The F-35B and F-35C have no internal gun and instead can use a Terma A/S multi-mission pod (MMP) carrying the GAU-22/A and 220 rounds; the pod is mounted on the centerline of the aircraft and shaped to reduce its radar cross-section.^{[178][181][verification needed]} In lieu of the gun, the pod can also be used for different equipment and purposes, such as electronic warfare, aerial reconnaissance, or rear-facing tactical radar.^[182][183] The pod was not susceptible to the accuracy issues that once plagued the gun on the F-35A variant,^[179] though was apparently not problem-free.^[180]

Lockheed Martin is developing a weapon rack called Sidekick that would enable the internal outboard station to carry two AIM-120s, thus increasing the internal air-to-air payload to six missiles, currently offered for Block 4.^[184][185] Block 4 will also have a rearranged hydraulic line and bracket to allow the F-35B to carry four SDBs per internal outboard station; integration of the MBDA Meteor is also planned.^[186][187] The USAF and USN are planning to integrate the AGM-88G AARGM-ER internally in the F-35A and F-35C.^[188] Norway and Australia are funding an adaptation of the Naval Strike Missile (NSM) for the F-35; designated Joint Strike Missile (JSM), two missiles can be carried internally with an additional four externally.^[189] Both hypersonic missiles and direct energy weapons such as solid-state laser are currently being considered as future upgrades; in 2024, Lockheed Martin disclosed its proposed Mako hypersonic missile, which can be carried internally in the F-35A and C and externally on the B.^{[190][N 14][194]} Additionally, Lockheed Martin is studying integrating a fiber laser that uses spectral beam combining multiple individual laser modules into a single high-power beam, which can be scaled to various levels.^[195]

F-35A weapon bays with two B61 nuclear bombs and 2 AIM-120 AMRAAM

The USAF plans for the F-35A to take up the close air support (CAS) mission in contested environments; amid criticism that it is not as well suited as a dedicated attack platform, USAF chief of staff Mark Welsh placed a focus on weapons for CAS sorties, including guided rockets, fragmentation rockets that shatter into individual projectiles before impact, and more compact ammunition for higher capacity gun pods.^[196] Fragmentary rocket warheads create greater effects than cannon shells as each rocket creates a "thousand-round burst", delivering more projectiles than a strafing run.^[197]

Engine

The aircraft is powered by a single Pratt & Whitney F135 low-bypass augmented turbofan with rated thrust of 28,000 lbf (125 kN) at military power and 43,000 lbf (191 kN) with afterburner. Derived from the Pratt & Whitney F119 used by the F-22, the F135 has a larger fan and higher bypass ratio to increase subsonic thrust and fuel efficiency, and unlike the F119, is not optimized for supercruise.^[198] The engine contributes to the F-35's stealth by having a low-observable augmenter, or afterburner, that incorporates fuel injectors into thick curved vanes; these vanes are covered by ceramic radar-absorbent materials and mask the turbine. The stealthy augmenter had problems with pressure pulsations, or "screech", at low altitude and high speed early in its development.^[199] The low-observable axisymmetric nozzle consists of 15 partially overlapping flaps that create a sawtooth pattern at the trailing edge, which reduces radar signature and creates shed vortices that reduce the infrared signature of the exhaust plume.^[200] Due to the engine's large dimensions, the U.S. Navy had to modify its underway replenishment system to facilitate at-sea logistics support.^[201] The F-35's Integrated Power Package (IPP) performs power and thermal management and integrates environment control, auxiliary power unit, engine starting, and other functions into a single system.^[202]

Illustration of the STOVL swivel nozzle, lift fan, and roll-control posts

The F135-PW-600 variant for the F-35B incorporates the Shaft-Driven Lift Fan (SDLF) to allow STOVL operations. Designed by Lockheed Martin and developed by Rolls-Royce, the SDLF, also known as the Rolls-Royce LiftSystem, consists of the lift fan, drive shaft, two roll posts, and a "three-bearing swivel module" (3BSM). The nozzle features three bearings resembling a short cylinder with nonparallel bases. As the toothed edges are rotated by motors, the nozzle swivels from being linear with the engine to being perpendicular. The thrust vectoring 3BSM nozzle allows the main engine exhaust to be deflected downward at the tail of the aircraft and is moved by a "fueldraulic" actuator that uses pressurized fuel as the working fluid.^{[203][204][205]} Unlike the Harrier's Pegasus engine that entirely uses direct engine thrust for lift, the F-35B's system augments the swivel nozzle's thrust with the lift fan; the fan is powered by the low-pressure turbine through a drive shaft when engaged with a clutch and placed near the front of the aircraft to provide a torque countering that of the 3BSM nozzle.^{[206][207][208]} Roll control during slow flight is achieved by diverting unheated engine bypass air through wing-mounted thrust nozzles called roll posts.^[209][210]

An alternative engine, the General Electric/Allison/Rolls-Royce F136, was being developed in the 1990s and 2000s; originally, F-35 engines from Lot 6 onward were competitively tendered. Using technology from the General Electric YF120, the F136 was claimed to have a greater temperature margin than the F135 due to the higher mass flow design making full use of the inlet.^[37][211] The F136 was canceled in December 2011 due to lack of funding.^[212][213]

The F-35 is expected to receive propulsion upgrades over its lifecycle to adapt to emerging threats and enable additional capabilities. In 2016, the Adaptive Engine Transition Program (AETP) was launched to develop and test adaptive cycle engines, with one major potential application being the re-engining of the F-35; in 2018, both GE and P&W were awarded contracts to develop 45,000 lbf (200 kN) thrust class demonstrators, with the designations XA100 and XA101 respectively.^[76] In addition to potential re-engining, P&W is also developing improvements to the baseline F135; the Engine Core Upgrade (ECU) is an update to the power module, originally called Growth Option 1.0 and then Engine Enhancement Package, that improves engine thrust and fuel burn by 5% and bleed air cooling capacity by 50% to support Block 4.^{[214][215][216]} The F135 ECU was selected over AETP engines in 2023 to provide additional power and cooling for the F-35. Although GE had expected that the more revolutionary XA100 could enter service with the F-35A and C by 2027 and could be adapted for the F-35B, the increased cost and risk caused the USAF to choose the F135 ECU instead.^[217][78]

Maintenance and logistics

The F-35 is designed to require less maintenance than prior stealth aircraft. Some 95% of all field-replaceable parts are "one deep"—that is, nothing else needs to be removed to reach the desired part; for instance, the ejection seat can be replaced without removing the canopy. The F-35 has a fibermat radar-absorbent material (RAM) baked into the skin, which is more durable, easier to work with, and faster to cure than older RAM coatings; similar coatings are being considered for application on older stealth aircraft such as the F-22.^{[138][218][219]} Skin corrosion on the F-22 led to the F-35 using a less galvanic corrosion-inducing skin gap filler, fewer gaps in the airframe skin needing filler, and better drainage.^[220] The flight control system uses electro-hydrostatic actuators rather than traditional hydraulic systems; these controls can be powered by lithium-ion batteries in case of emergency.^[221][222] Commonality between variants led to the USMC's first aircraft maintenance Field Training Detachment, which applied USAF lessons to their F-35 operations.^[223]

The F-35 was initially supported by a computerized maintenance management system named Autonomic Logistics Information System (ALIS). In concept, any F-35 can be serviced at any maintenance facility and all parts can be globally tracked and shared as needed.^[224] Due to numerous problems,^[225] such as unreliable diagnoses, excessive connectivity requirements, and security vulnerabilities, ALIS is being replaced by the cloud-based Operational Data Integrated Network (ODIN).^{[226][227][228]} From September 2020, ODIN base kits (OBKs)^[229] were running ALIS software, as well as ODIN software, first at Marine Corps Air Station (MCAS) Yuma, Arizona, then at Naval Air Station Lemoore, California, in support of Strike Fighter Squadron (VFA) 125 on 16 July 2021, and then Nellis Air Force Base, Nevada, in support of the 422nd Test and Evaluation Squadron (TES) on 6 August 2021. In 2022, over a dozen more OBK sites will replace the ALIS's Standard Operating Unit unclassified (SOU-U) servers.^[230] OBK performance is double that of ALIS.^{[231][230][229]}

Operational history

Testing

The first F-35A, AA-1, conducted its engine run in September 2006 and first flew on 15 December 2006.^[232] Unlike all subsequent aircraft, AA-1 did not have the weight optimization from SWAT; consequently, it mainly tested subsystems common to subsequent aircraft, such as the propulsion, electrical system, and cockpit displays. This aircraft was retired from flight testing in December 2009 and was used for live-fire testing at NAS China Lake.^[233]

The first delivered USAF F-35A on its delivery flight to Eglin AFB, July 2011

The first F-35B, BF-1, flew on 11 June 2008, while the first weight-optimized F-35A and F-35C, AF-1 and CF-1, flew on 14 November 2009 and 6 June 2010 respectively. The F-35B's first hover was on 17 March 2010, followed by its first vertical landing the next day.^[234] The F-35 Integrated Test Force (ITF) consisted of 18 aircraft at Edwards Air Force Base and Naval Air Station Patuxent River. Nine aircraft at Edwards, five F-35As, three F-35Bs, and one F-35C, performed flight sciences testing such as F-35A envelope expansion, flight loads, stores separation, as well as mission systems testing. The other nine aircraft at Patuxent River, five F-35Bs and four F-35Cs, were responsible for F-35B and C envelope expansion and STOVL and CV suitability testing. Additional carrier suitability testing was conducted at Naval Air Warfare Center Aircraft Division at Lakehurst, New Jersey. Two non-flying aircraft of each variant were used to test static loads and fatigue.^[235] For testing avionics and mission systems, a modified Boeing 737-300 with a duplication of the cockpit, the Lockheed Martin CATBird has been used.^[185] Field testing of the F-35's sensors were conducted during Exercise Northern Edge 2009 and 2011, serving as significant risk-reduction steps.^[236][237]

Flight tests revealed several serious deficiencies that required costly redesigns, caused delays, and resulted in several fleet-wide groundings. In 2011, the F-35C failed to catch the arresting wire in all eight landing tests; a redesigned tail hook was delivered two years later.^[238][239] By June 2009, many of the initial flight test targets had been accomplished but the program was behind schedule.^[240] Software and mission systems were among the biggest sources of delays for the program, with sensor fusion proving especially challenging.^[121] In fatigue testing, the F-35B suffered several premature cracks, requiring a redesign of the structure.^[241] A third non-flying F-35B is currently planned to test the redesigned structure. The F-35B and C also had problems with the horizontal tails suffering heat damage from prolonged afterburner use.^{[N 15][244][245]} Early flight control laws had problems with "wing drop"^{[N 16]} and also made the airplane sluggish, with high angles-of-attack tests in 2015 against an F-16 showing a lack of energy.^[246][247]

U.S. Marine Corps F-35B lands on JS Izumo.

At-sea testing of the F-35B was first conducted aboard USS Wasp. In October 2011, two F-35Bs conducted three weeks of initial sea trials, called Development Test I.^[248] The second F-35B sea trials, Development Test II, began in August 2013, with tests including nighttime operations; two aircraft completed 19 nighttime vertical landings using DAS imagery.^[249][250] The first operational testing involving six F-35Bs was done on the Wasp in May 2015. The final Development Test III on USS America involving operations in high sea states was completed in late 2016.^[251] A Royal Navy F-35 conducted the first "rolling" landing on board HMS Queen Elizabeth in October 2018.^[252]

USN F-35C makes the aircraft's first arrested landing aboard the carrier USS Nimitz off the coast of San Diego

After the redesigned tail hook arrived, the F-35C's carrier-based Development Test I began in November 2014 aboard USS Nimitz and focused on basic day carrier operations and establishing launch and recovery handling procedures.^[253] Development Test II, which focused on night operations, weapons loading, and full power launches, took place in October 2015. The final Development Test III was completed in August 2016, and included tests of asymmetric loads and certifying systems for landing qualifications and interoperability.^[254] Operational test of the F-35C was conducted in 2018 and the first operational squadron achieved safe-for-flight milestone that December, paving the way for its introduction in 2019.^[4][255]

The F-35's reliability and availability have fallen short of requirements, especially in the early years of testing. The ALIS maintenance and logistics system was plagued by excessive connectivity requirements and faulty diagnoses. In late 2017, the GAO reported the time needed to repair an F-35 part averaged 172 days, which was "twice the program's objective," and that shortage of spare parts was degrading readiness.^[256] In 2019, while individual F-35 units have achieved mission-capable rates of over the target of 80% for short periods during deployed operations, fleet-wide rates remained below target. The fleet availability goal of 65% was also not met, although the trend shows improvement. Internal gun accuracy of the F-35A was unacceptable until misalignment issues were addressed by 2024.^[244][257] As of 2020, the number of the program's most serious issues have been decreased by half.^[258][180]

Operational test and evaluation (OT&E) with Block 3F, the final configuration for SDD, began in December 2018, but its completion was delayed particularly by technical problems in integration with the DOD's Joint Simulation Environment (JSE);^[259] the F-35 finally completed all JSE trials in September 2023.^[70]

United States

Training

The first F-35C Lightning II sortie takes off from VFA-101 at Eglin Air Force Base.

The F-35A and F-35B were cleared for basic flight training in early 2012, although there were concerns over safety and performance due to lack of system maturity at the time.^{[260][261][262]} During the Low Rate Initial Production (LRIP) phase, the three U.S. military services jointly developed tactics and procedures using flight simulators, testing effectiveness, discovering problems and refining design. On 10 September 2012, the USAF began an operational utility evaluation (OUE) of the F-35A, including logistical support, maintenance, personnel training, and pilot execution.^[263][264]

A pair of F-35Cs and F/A-18E/Fs fly over NAS Fallon, home of TOPGUN, in September 2015.

The USMC F-35B Fleet Replacement Squadron (FRS) was initially based at Eglin AFB in 2012 alongside USAF F-35A training units, before moving to MCAS Beaufort in 2014 while another FRS was stood up at MCAS Miramar in 2020.^[265][266] The USAF F-35A basic course is held at Eglin AFB and Luke AFB; in January 2013, training began at Eglin with capacity for 100 pilots and 2,100 maintainers at once.^[267] Additionally, the 6th Weapons Squadron of the USAF Weapons School was activated at Nellis AFB in June 2017 for F-35A weapons instructor curriculum while the 65th Aggressor Squadron was reactivated with the F-35A in June 2022 to expand training against adversary stealth aircraft tactics.^[268] The USN stood up its F-35C FRS in 2012 with VFA-101 at Eglin AFB, but operations would later be transferred and consolidated under VFA-125 at NAS Lemoore in 2019.^[269] The F-35C was introduced to the Strike Fighter Tactics Instructor course, or TOPGUN, in 2020 and the additional capabilities of the aircraft greatly revamped the course syllabus.^[270]

U.S. Marine Corps

On 16 November 2012, the USMC received the first F-35B of VMFA-121 at MCAS Yuma.^[271] The USMC declared Initial Operational Capability (IOC) for the F-35B in the Block 2B configuration on 31 July 2015 after operational trials, with some limitations in night operations, mission systems, and weapons carriage.^[2][272] USMC F-35Bs participated in their first Red Flag exercise in July 2016 with 67 sorties conducted.^[273] The first F-35B deployment occurred in 2017 at MCAS Iwakuni, Japan; combat employment began in July 2018 from the amphibious assault ship USS Essex, with the first combat strike on 27 September 2018 against a Taliban target in Afghanistan.^[274]

In addition to deploying F-35Bs on amphibious assault ships, the USMC plans to disperse the aircraft among austere forward-deployed bases with shelter and concealment to enhance survivability while remaining close to a battlespace. Known as distributed STOVL operations (DSO), F-35Bs would operate from temporary bases in allied territory within hostile missile engagement zones and displace inside the enemy's 24- to 48-hour targeting cycle; this strategy allows F-35Bs to rapidly respond to operational needs, with mobile forward arming and refueling points (M-FARPs) accommodating KC-130 and MV-22 Osprey aircraft to rearm and refuel the jets, as well as littoral areas for sea links of mobile distribution sites. For higher echelons of maintenance, F-35Bs would return from M-FARPs to rear-area friendly bases or ships. Helicopter-portable metal planking is needed to protect unprepared roads from the F-35B's exhaust; the USMC are studying lighter heat-resistant options.^[275] These operations have become part of the larger USMC Expeditionary Advanced Base Operations (EABO) concept.^[276]

The first USMC F-35C squadron, VMFA-314, achieved Full Operational Capability in July 2021 and was first deployed on board USS Abraham Lincoln as a part of Carrier Air Wing 9 in January 2022.^[277]

In 2024, Lt. Gen. Sami Sadat of Afghanistan described an operation using F-35Bs from USS Essex which bombed a Taliban position through cloud cover. "The impact [the F-35] left on my soldiers was amazing. Like, whoa, you know, we have this technology," Sadat said. "But also the impact on the Taliban was quite crippling, because they have never seen Afghan forces move in the winter, and they have never seen planes that could bomb through the clouds."^[278]

On 9 November 2024 Marine F-35Cs carried out strikes on the Houthi movement in Yemen in the context of the Red Sea crisis.^[279]

U.S. Air Force

USAF F-35A in the Block 3i configuration achieved IOC with the USAF's 34th Fighter Squadron at Hill Air Force Base, Utah on 2 August 2016.^[3] F-35As conducted their first Red Flag exercise in 2017; system maturity had improved and the aircraft scored a kill ratio of 15:1 against an F-16 aggressor squadron in a high-threat environment.^[280] The first USAF F-35A deployment occurred on 15 April 2019 to Al Dhafra Air Base, UAE.^[281] On 27 April 2019, USAF F-35As were first used in combat in an airstrike on an Islamic State tunnel network in northern Iraq.^[282]

For European basing, RAF Lakenheath in the UK was chosen as the first installation to station two F-35A squadrons, with 48 aircraft adding to the 48th Fighter Wing's existing F-15C and F-15E squadrons. The first aircraft of the 495th Fighter Squadron arrived on 15 December 2021.^[283][284]

The F-35's operating cost is higher than some older USAF tactical aircraft. In fiscal year 2018, the F-35A's cost per flight hour (CPFH) was $44,000, a number that was reduced to $35,000 in 2019.^[285] For comparison, in 2015 the CPFH of the A-10 was $17,716; the F-15C, $41,921; and the F-16C, $22,514.^[286] Lockheed Martin hopes to reduce it to $25,000 by 2025 through performance-based logistics and other measures.^[287]

VFA-147 F-35C catches the wire on USS George Washington.

U.S. Navy

The USN achieved operational status with the F-35C in Block 3F on 28 February 2019.^[4] On 2 August 2021, the F-35C of VFA-147, as well as the CMV-22 Osprey, embarked on their maiden deployments as part of Carrier Air Wing 2 on board USS Carl Vinson.^[288]

United Kingdom

F-35B ZM148 of No. 617 Squadron landing on HMS Queen Elizabeth, 2019

The United Kingdom's Royal Air Force and Royal Navy operate the F-35B. Called Lightning in British service,^[289] it has replaced the Harrier GR9, retired in 2010, and Tornado GR4, retired in 2019. The F-35 is to be Britain's primary strike aircraft for the next three decades. One of the Royal Navy's requirements was a Shipborne Rolling and Vertical Landing (SRVL) mode to increase maximum landing weight by using wing lift during landing.^[290][291] Like the Italian Navy, British F-35Bs use ski-jumps to fly from their aircraft carriers, HMS Queen Elizabeth and HMS Prince of Wales. British F-35Bs are not intended to use the Brimstone 2 missile.^[292] In July 2013, Chief of the Air Staff Air Chief Marshal Sir Stephen Dalton announced that No. 617 (The Dambusters) Squadron would be the RAF's first operational F-35 squadron.^[293][294]

The first British F-35 squadron was No. 17 (Reserve) Test and Evaluation Squadron (TES), which stood up on 12 April 2013 as the plane's Operational Evaluation Unit.^[295] By June 2013, the RAF had received three F-35s of the 48 on order, initially based at Eglin Air Force Base.^[296] In June 2015, the F-35B undertook its first launch from a ski-jump at NAS Patuxent River.^[297] On 5 July 2017, it was announced the second UK-based RAF squadron would be No. 207 Squadron,^[298] which reformed on 1 August 2019 as the Lightning Operational Conversion Unit.^[299] No. 617 Squadron reformed on 18 April 2018 during a ceremony in Washington, D.C., becoming the first RAF front-line squadron to operate the type;^[300] receiving its first four F-35Bs on 6 June, flying from MCAS Beaufort to RAF Marham.^[301] On 10 January 2019, No. 617 Squadron and its F-35s were declared combat-ready.^[302]

April 2019 saw the first overseas deployment of a UK F-35 squadron when No. 617 Squadron went to RAF Akrotiri, Cyprus.^[303] This reportedly led on 25 June 2019 to the first combat use of an RAF F-35B: an armed reconnaissance flight searching for Islamic State targets in Iraq and Syria.^[304] In October 2019, the Dambusters and No. 17 TES F-35s were embarked on HMS Queen Elizabeth for the first time.^[305] No. 617 Squadron departed RAF Marham on 22 January 2020 for their first Exercise Red Flag with the Lightning.^[306] As of November 2022, 26 F-35Bs were based in the United Kingdom (with 617 and 207 Squadrons) and a further three were permanently based in the United States (with 17 Squadron) for testing and evaluation purposes.^[307]

The UK's second operational squadron is the Fleet Air Arm's 809 Naval Air Squadron, which stood up in December 2023.^{[308][309][310]}

Australia

Four F-35As assigned to No. 3 Squadron RAAF in 2023

Australia's first F-35, designated A35-001, was manufactured in 2014, with flight training provided through international Pilot Training Centre (PTC) at Luke Air Force Base in Arizona.^[311] The first two F-35s were unveiled to the Australian public on 3 March 2017 at the Avalon Airshow.^[312] By 2021, the Royal Australian Air Force had accepted 26 F-35As, with nine in the US and 17 operating at No 3 Squadron and No 2 Operational Conversion Unit at RAAF Base Williamtown.^[311] With 41 trained RAAF pilots and 225 trained technicians for maintenance, the fleet was declared ready to deploy on operations.^[313] It was originally expected that Australia would receive all 72 F-35s by 2023.^[312] Its final nine aircraft, which were the TR-3 version, arrived in Australia in December 2024.^[314]

Israel

The Israeli Air Force (IAF) declared the F-35 operationally capable on 6 December 2017.^[315] According to Kuwaiti newspaper Al Jarida, in July 2018, a test mission of at least three IAF F-35s flew to Iran's capital Tehran and back to Tel Aviv. While publicly unconfirmed, regional leaders acted on the report; Iran's supreme leader Ali Khamenei reportedly fired the air force chief and commander of Iran's Revolutionary Guard Corps over the mission.^[316][317]

On 22 May 2018, IAF chief Amikam Norkin said that the service had employed their F-35Is in two attacks on two battle fronts, marking the first combat operation of an F-35 by any country.^[13][318] Norkin said it had been flown "all over the Middle East", and showed photos of an F-35I flying over Beirut in daylight.^[319] In July 2019, Israel expanded its strikes against Iranian missile shipments; IAF F-35Is allegedly struck Iranian targets in Iraq twice.^[320]

In November 2020, the IAF announced the delivery of a unique F-35I testbed aircraft among a delivery of four aircraft received in August, to be used to test and integrate Israeli-produced weapons and electronic systems on F-35s received later. This is the only example of a testbed F-35 delivered to a non-US air force.^[321][322]

On 11 May 2021, eight IAF F-35Is took part in an attack on 150 targets in Hamas' rocket array, including 50–70 launch pits in the northern Gaza Strip, as part of Operation Guardian of the Walls.^[323]

On 6 March 2022, the IDF stated that on 15 March 2021, F-35Is shot down two Iranian drones carrying weapons to the Gaza Strip.^[324] This was the first operational shoot down and interception carried out by the F-35. They were also used in the Israel–Hamas war.^{[325][326][327]}

On 2 November 2023, the IDF posted on social media that they used an F-35I to shoot down a Houthi cruise missile over the Red Sea that was fired from Yemen during the Israel-Hamas War.^[328]

The F-35I Adir was used in the 29 September 2024 Israeli attacks on Yemen.^[329] F-35Is were also reportedly involved in the October 2024 Israeli strikes on Iran.^[330]

Italy

Italy's F-35As were declared to have reached initial operational capability (IOC) on 30 November 2018. At the time Italy had taken delivery of 10 F-35As and one F-35B, with 2 F-35As and the one F-35B being stationed in the U.S. for training, the remaining 8 F-35As were stationed in Amendola.^[331]

Japan

F-35A in afterburner at JASDF Misawa Air Base

Japan's F-35As were declared to have reached initial operational capability (IOC) on 29 March 2019. At the time Japan had taken delivery of 10 F-35As stationed in Misawa Air Base. Japan plans to eventually acquire a total of 147 F-35s, which will include 42 F-35Bs. It plans to use the latter variant to equip Japan's Izumo-class multi-purpose destroyers.^[332][333]

Norway

First Norwegian F-35A Lightning II at Luke Air Force Base

On 6 November 2019 Norway declared initial operational capability (IOC) for its fleet of 15 F-35As out of a planned 52 F-35As.^[334] On 6 January 2022 Norway's F-35As replaced its F-16s for the NATO quick reaction alert mission in the high north.^[335]

On 22 September 2023, two F-35As from the Royal Norwegian Air Force landed on a motorway near Tervo, Finland, showing, for the first time, that F-35As can operate from paved roads. Unlike the F-35B they cannot land vertically. The fighters were also refueled with their engines running. Commander of the Royal Norwegian Air Force, Major General Rolf Folland, said: "Fighter jets are vulnerable on the ground, so by being able to use small airfields – and now motorways – (this) increases our survivability in war,"^[336]

Netherlands

On 27 December 2021 the Netherlands declared initial operational capability (IOC) for its fleet of 24 F-35As that it has received to date from its order for 46 F-35As.^[337] In 2022, the Netherlands announced they will order an additional six F-35s, totaling 52 aircraft ordered.^[338]

Variants

The F-35 was designed with three initial variants – the F-35A, a CTOL land-based version; the F-35B, a STOVL version capable of use either on land or on aircraft carriers; and the F-35C, a CATOBAR carrier-based version. Since then, there has been work on the design of nationally specific versions for Israel and Canada.

F-35A

The F-35A is the conventional take-off and landing (CTOL) variant intended for the USAF and other air forces. It is the smallest, lightest version and capable of 9 g, the highest of all variants.

Although the F-35A currently conducts aerial refueling via boom and receptacle method, the aircraft can be modified for probe-and-drogue refueling if needed by the customer.^[339][340] A drag chute pod can be installed on the F-35A, with the Royal Norwegian Air Force being the first operator to adopt it.^[341]

F-35B

See also: Joint Combat Aircraft

F-35B cutaway with lift fan

F-35B conducting a vertical landing (note the rotated nozzle and the lift fan vent duct)

The F-35B is the short take-off and vertical landing (STOVL) variant of the aircraft. Similar in size to the A variant, the B sacrifices about a third of the A variant's fuel volume to accommodate the shaft-driven lift fan (SDLF).^[342][343] This variant is limited to 7 g. Unlike other variants, the F-35B has no landing hook. The "STOVL/HOOK" control instead engages conversion between normal and vertical flight.^[344][345] The F-35B is capable of Mach 1.6 (1,976 km/h) and can perform vertical and/or short take-off and landing (V/STOL).^[209]

F-35C

The F-35C is a carrier-based variant designed for catapult-assisted take-off, barrier arrested recovery operations from aircraft carriers. Compared to the F-35A, the F-35C features larger wings with foldable wingtip sections, larger control surfaces for improved low-speed control, stronger landing gear for the stresses of carrier arrested landings, a twin-wheel nose gear, and a stronger tailhook for use with carrier arrestor cables.^[239] The larger wing area allows for decreased landing speed while increasing both range and payload. The F-35C is limited to 7.5 g.^[346]

F-35I "Adir"

Main article: Lockheed Martin F-35 Lightning II Israeli procurement

The F-35I Adir (Hebrew: אדיר, meaning "Awesome",^[347] or "Mighty"^[348]) is an F-35A with unique Israeli modifications. The US initially refused to allow such changes before permitting Israel to integrate its own electronic warfare systems, including sensors and countermeasures. The main computer has a plug-and-play function for add-on systems; proposals include an external jamming pod, and new Israeli air-to-air missiles and guided bombs in the internal weapon bays.^[349][350] A senior IAF official said that the F-35's stealth may be partly overcome within 10 years despite a 30 to 40-year service life, thus Israel's insistence on using their own electronic warfare systems.^[351] In 2010, Israel Aerospace Industries (IAI) considered a two-seat F-35 concept; an IAI executive noted that there was a "known demand for two seats not only from Israel but from other air forces".^[352] In 2008, IAI planned to produce conformal fuel tanks.^{[353][needs update]}

Israel had ordered a total of 75 F-35Is by 2023, with 36 already delivered as of November 2022.^[354][355]

Proposed variants

CF-35

Main article: Lockheed Martin F-35 Lightning II Canadian procurement

The Canadian CF-35 was a proposed variant that would differ from the F-35A through the addition of a drogue parachute and the potential inclusion of an F-35B/C-style refueling probe.^[341][356] In 2012, it was revealed that the CF-35 would employ the same boom refueling system as the F-35A.^[357] One alternative proposal would have been the adoption of the F-35C for its probe refueling and lower landing speed; however, the Parliamentary Budget Officer's report cited the F-35C's limited performance and payload as being too high a price to pay.^[358] Following the 2015 Federal Election the Liberal Party, whose campaign had included a pledge to cancel the F-35 procurement,^[359] formed a new government and commenced an open competition to replace the existing CF-18 Hornet.^[360] The CF-35 variant was deemed too expensive to develop, and was never considered. The Canadian government decided to not pursue any other modifications in the Future Fighter Capability Project, and instead focused on the potential procurement of the existing F-35A variant.^[361]

On 28 March 2022, the Canadian Government began negotiations with Lockheed Martin for 88 F-35As^[362] to replace the aging fleet of CF-18 fighters starting in 2025.^[363] The aircraft are reported to cost up to CA$19bn total with a life-cycle cost estimated at CA$77bn over the course of the F-35 program.^[364][365] On 9 January 2023, Canada formally confirmed the purchase of 88 aircraft. The initial delivery to the Royal Canadian Air Force in 2026 will be 4 aircraft, followed by 6 aircraft each in 2027–2028, and the rest to be delivered by 2032.^[366][367] The additional characteristics confirmed for the CF-35^{[inconsistent]} included the drag chute pod for landings at short/icy arctic runways, as well as the 'sidekick' system, which allows the CF-35 to carry up to 6 x AIM-120D missiles internally (instead of the typical internal capacity of 4 x AIM-120 missiles on other variants).^[368]

New export variant

In December 2021, it was reported that Lockheed Martin was developing a new variant for an unspecified foreign customer. The Department of Defense released US$49 million in funding for this work.^[369]

Operators

Main articles: Lockheed Martin F-35 Lightning II operators and Lockheed Martin F-35 Lightning II procurement

One of the RAAF's first two F-35As in December 2014

A Japan Air Self-Defense Force F-35A in flight

Republic of Korea Air Force F-35A

An F-35A Lightning II of the Royal Norwegian Air Force conducts a test flight over Fort Worth in October 2015.

First four RAF F-35Bs on a delivery flight to RAF Marham, June 2018

USN F-35C performs a touch-and-go landing aboard USS Abraham Lincoln.

 Australia

• Royal Australian Air Force – 72 F-35A delivered as of December 2024^[update], of 72 ordered.^[314]

 Belgium

• Belgian Air Component – 1 officially delivered^[370] (but none has left the US as of March 2024^{[update][371]}), 34 F-35A planned as of 2019^[update].^[372][373]

 Denmark

• Royal Danish Air Force – 10 F-35As delivered (including 6 stationed at Luke AFB for training) of the 27 planned for the RDAF.^{[374][375][376][377]}

 Israel

• Israeli Air Force – 39 delivered as of July 2023^[update] (F-35I "Adir").^[378] Includes one F-35 testbed aircraft for indigenous Israeli weapons, electronics and structural upgrades, designated (AS-15).^[379][380] A total of 75 ordered.^[381]

 Italy

• Italian Air Force – 17 F-35As and 3 F-35B delivered as of April 2023^{[update][382]} of 75 F-35As and 20 F-35Bs ordered for the Italian Air Force.^{[383][384][385][386][387]}
• Italian Navy – 3 delivered as of April 2023^[update], out of 20 F-35Bs ordered for the Italian Navy.^{[383][384][385][387]}

 Japan

• Japan Air Self-Defense Force – 27 F-35As operational as of March 2022^[update] with a total order of 147, including 105 F-35As and 42 F-35Bs.^{[388][389][390][391]}

 Netherlands

• Royal Netherlands Air Force – 39 F-35As delivered and operational, of which 8 trainer aircraft based at Luke Air Force Base in the USA.^[337] 52 F-35As ordered in total.^{[392][393][394]} The RNLAF is the second air force with a 5th gen-only fighter fleet after the retirement of its F-16s.^[395]

 Norway

• Royal Norwegian Air Force – 40^[396] F-35As delivered and operational, of which 21 are in Norway and 10 are based in the US for training as of 11 August 2021^{[update][397]} of 52 F-35As planned in total.^[398] They differ from other F-35A through the addition of a drogue parachute.^[399]

 South Korea

• Republic of Korea Air Force – 40 F-35As ordered and delivered as of January 2022^[update],^[400] with 25 more ordered in September 2023.^{[401][402][403][404]}
• Republic of Korea Navy – about 20 F-35Bs planned.^[405][406] It has not yet been approved by South Korean parliament.^[407]

 United Kingdom

• Royal Air Force and Royal Navy (owned by the RAF but jointly operated) – 34 F-35Bs received^{[408][409][410]} with 30 in the UK after the loss of one aircraft in November 2021;^{[307][411][412][413]} the other three are in the US where they are used for testing and training.^[414] 42 (24 FOC fighters and 18 training aircraft) originally intended to be fast-tracked by 2023;^[415][416] A total of 48 ordered as of 2021^[update]; a total of 138 were originally planned, the expectation in 2021 was to eventually reach around 60 or 80.^[417] In 2022, it was announced that the UK would acquire 74 F-35Bs, with a decision on whether or not to go beyond that number, including the possibility of reviving the original plan of 138 aircraft, to be made in the mid-2020s.^[418] In February 2024 the United Kingdom appeared to signal a reaffirmation of its commitment to procure 138 F-35B aircraft, as per the original plan.^[419]

 United States

• United States Air Force – 302 delivered with 1,763 F-35As planned^[420]
• United States Marine Corps – 112 F-35B/C delivered^[421] with 353 F-35Bs and 67 F-35Cs planned^[422]
• United States Navy – 30 delivered^[421] with 273 F-35Cs planned^[422]

Future operators

 Canada

Further information: Lockheed Martin F-35 Lightning II Canadian procurement

• Royal Canadian Air Force - 88 F-35As (Block 4) ordered on 9 January 2023. The first 4 are expected to be delivered in 2026, 6 in 2027, another 6 in 2028, and the rest delivered by 2032.^[423] This will phase out the CF-18s that were delivered in the 1980s.^[424][425]

 Czech Republic

• Czech Air Force – The U.S. State Department approved a possible sale to the Czech Republic of F-35 aircraft, munitions and related equipment worth up to $5.62 billion, according to a 29 June 2023 announcement.^[426] On 29 January 2024, the Czech government signed a memorandum of understanding with the U.S. for the purchase of 24 F-35A fighters.^[427] In September 2024, the Czech Republic signed a contract for the logistic support of the F-35A.^[428]

 Finland

• Finnish Air Force – 64 F-35As on order as of 2022^[update].^[429] F-35A Block 4 selected via the HX Fighter Program to replace the current F/A-18 Hornets.^[430][431]

 Germany

• German Air Force – 35 F-35A ordered as of 2023^[update],^[432][433] with an order for 10 more being considered as of 2024^[update].^[434]

 Greece

• Hellenic Air Force – 20 F-35As on order, with expected delivery in late 2027 to early 2028.^[435][436] An option for another additional 20 aircraft is also included.^[437]

 Poland

• Polish Air Force – 32 F-35A “Husarz” Block 4 jets with "Technology Refresh 3" software update and drogue parachutes were ordered on 31 January 2020.^[438][439] The deliveries are expected to begin in 2024 and conclude in 2030. There are plans for two more squadrons consisting of 16 jets each, for a total of 32 additional F-35s.^[440]

 Romania

• Romanian Air Force – Romania signed the contract for 32 F-35A worth $6.5 billion on 21 November 2024.^[441] The plan is to buy 48 F-35A aircraft in two phases – first phase of 32 and second phase of 16. The first F-35s will arrive after 2030 and will replace the current Romanian F-16 fleet between 2034 and 2040.^[442][443]

 Singapore

• Republic of Singapore Air Force – 12 F-35Bs on order as of February 2024^[update] with first 4 to be delivered in 2026; The other 8 are to be delivered in 2028. 8 F-35As have been ordered, and are expected to arrive by 2030.^[444][445]

 Switzerland

• Swiss Air Force – 36 F-35A ordered to replace the current F-5E/F Tiger II and F/A-18C/D Hornet. Deliveries will begin in 2027 and conclude in 2030.^[446][447]

Order and approval cancellations

 Republic of China

• Republic of China Air Force – Taiwan has requested to buy the F-35 from the US. However this has been rejected by the US in fear of a critical response from China.^[448] In March 2009 Taiwan again was looking to buy U.S. fifth-generation fighter jets. However, in September 2011, during a visit to the US, the Deputy Minister of National Defense of Taiwan confirmed that while the country was busy upgrading its current F-16s it was still also looking to procure a next-generation aircraft such as the F-35. This received the usual critical response from China.^[449] Taiwan renewed its push for an F-35 purchase during Donald Trump's presidency in early 2017, again causing criticism from China.^[450] In March 2018, Taiwan once again reiterated its interest in the F-35 in light of an anticipated round of arms procurement from the United States. The F-35B STOVL variant is reportedly the political favorite as it would allow the Republic of China Air Force to continue operations after its limited number of runways were to be bombed in an escalation with the People's Republic of China.^[451] In April 2018 however it became clear that the U.S. government was reluctant about selling the F-35 to Taiwan over worries of Chinese spies within the Taiwanese Armed Forces, possibly compromising classified data concerning the aircraft and granting Chinese military officials access. In November 2018, it was reported that Taiwanese military leadership had abandoned the procurement of the F-35 in favor of a larger number of F-16V Viper aircraft. The decision was reportedly motivated by concerns about industry independence, as well as cost and previously raised espionage concerns.^[452]

 Thailand

• Royal Thai Air Force – 8 or 12 planned to replace F-16A/B Block 15 ADF in service. On 12 January 2022, Thailand's cabinet approved a budget for the first four F-35A, estimated at 13.8 billion baht in FY2023.^{[453][454][455]} On 22 May 2023, the United States Department of Defense implied it will turn down Thailand's bid to buy F-35 fighters, and instead offer F-16 Block 70/72 Viper and F-15EX Eagle II fighters, a Royal Thai Air Force source said.^[456]

 Turkey

• Turkish Air Force – 30 were ordered,^[457] of up to 100 total planned.^[458][459] Future purchases have been banned by the U.S. with contracts canceled by early 2020, following Turkey's decision to buy the S-400 missile system from Russia.^[460] Six of Turkey's 30 ordered F-35As were completed as of 2019^[update] (they are still kept in a hangar in the United States as of 2023^{[update][461][462]} and so far haven't been transferred to the USAF, despite a modification in the 2020 Fiscal Year defense budget by the U.S. Congress which gives authority to do so if necessary),^[463][464] and two more were at the assembly line in 2020.^[463][464] The first four F-35As were delivered to Luke Air Force Base in 2018^[465] and 2019^[466] for the training of Turkish pilots.^[467][468] On 20 July 2020, the U.S. government had formally approved the seizure of eight F-35As originally bound for Turkey and their transfer to the USAF, together with a contract to modify them to USAF specifications.^[469] The U.S. has not refunded the $1.4 billion payment made by Turkey for purchasing the F-35A fighters as of January 2023^[update].^[461][462] On 1 February 2024, the United States expressed willingness to readmit Turkey into the F-35 program if Turkey agrees to give up its S-400 system.^[470]

 United Arab Emirates

• United Arab Emirates Air Force – Up to 50 F-35As planned.^[471] But on 27 January 2021, the Biden administration temporarily suspended the F-35 sales to the UAE.^[472] After pausing the bill to review the sale, the Biden administration confirmed to move forward with the deal on 13 April 2021.^[473] In December 2021 UAE withdrew from purchasing F-35s as they did not agree to the additional terms of the transaction from the US.^[474][475] On 14 September 2024, a senior UAE official said that the United Arab Emirates does not expect to resume talks with the U.S. about the F-35.^[476]

Accidents and notable incidents

Main article: List of accidents and incidents involving the Lockheed Martin F-35 Lightning II

Various models of the F-35 have been involved in incidents since 2014. They have often involved operator error or mechanical issues, which has set back the program.^[477] In comparison to most military aircraft, however, it is described as being safe.^[478]

Specifications (F-35A)

F-35A three-view drawing

Data from Lockheed Martin: F-35 specifications,^{[479][480][481][482]} Lockheed Martin: F-35 weaponry,^[483] Lockheed Martin: F-35 Program Status,^[109] F-35 Program brief,^[158] FY2019 Select Acquisition Report (SAR),^[346] Director of Operational Test & Evaluation^[484]

General characteristics

• Crew: 1
• Length: 51.4 ft (15.7 m)
• Wingspan: 35 ft (11 m)
• Height: 14.4 ft (4.4 m)
• Wing area: 460 sq ft (43 m²)
• Aspect ratio: 2.66
• Empty weight: 29,300 lb (13,290 kg)
• Gross weight: 49,540 lb (22,471 kg)
• Max takeoff weight: 65,918 lb (29,900 kg) ^[485]
• Fuel capacity: 18,250 lb (8,278 kg) internal
• Powerplant: 1 × Pratt & Whitney F135-PW-100 afterburning turbofan, 28,000 lbf (120 kN) thrust dry, 43,000 lbf (190 kN) with afterburner

Performance

• Maximum speed: Mach 1.6 at high altitude
  • Mach 1.06, 700 knots (806 mph; 1,296 km/h) at sea level
• Range: 1,500 nmi (1,700 mi, 2,800 km)
• Combat range: 669 nmi (770 mi, 1,239 km) interdiction mission (air-to-surface) on internal fuel
  • 760 nmi (870 mi; 1,410 km), air-to-air configuration on internal fuel^[486]
• Service ceiling: 50,000 ft (15,000 m)
• g limits: +9.0
• Wing loading: 107.7 lb/sq ft (526 kg/m²) at gross weight
• Thrust/weight: 0.87 at gross weight (1.07 at loaded weight with 50% internal fuel)

Armament

• Guns: 1 × 25 mm GAU-22/A 4-barrel rotary cannon, 180 rounds^{[N 17]}
• Hardpoints: 4 × internal stations, 6 × external stations on wings with a capacity of 5,700 pounds (2,600 kg) internal, 15,000 pounds (6,800 kg) external, 18,000 pounds (8,200 kg) total weapons payload, with provisions to carry combinations of:
  • Missiles:
    
    • Air-to-air missiles:
      • AIM-9X Sidewinder
      • AIM-120 AMRAAM
      • AIM-132 ASRAAM
      • AIM-260 JATM (being integrated)^[487]
      • MBDA Meteor (Block 4, for F-35B, not before 2027)^{[488][186][489]}
    • Air-to-surface missiles:
      • AGM-88G AARGM-ER (Block 4)
      • AGM-158 JASSM^[177]
      • AGM-179 JAGM
      • SPEAR 3 (Block 4, in development, integration contracted)^[170][489]
      • Stand-in Attack Weapon (SiAW)^[490]
    • Anti-ship missiles:
      • AGM-158C LRASM^[491] (being integrated)
      • Joint Strike Missile (being integrated)^[492]
  • Bombs:
    
    • Joint Direct Attack Munition
    • Paveway
    • Precision-guided glide bomb:
      • AGM-154 JSOW
      • GBU-39 Small Diameter Bomb
      • GBU-53/B StormBreaker
    • B61 mod 12 nuclear bomb^[493][171]

Avionics

• AN/APG-81 or AN/APG-85 (Lot 17 onwards) AESA radar^[494][495]
• AN/AAQ-40 Electro-Optical Targeting System^[496]
• AN/AAQ-37 Electro-Optical Distributed Aperture System^[497]
• AN/ASQ-239 Barracuda electronic warfare/electronic countermeasures system^[498]
• AN/ASQ-242 CNI suite, which includes
  • Harris Corporation Multifunction Advanced Data Link (MADL) communication system
  • Link 16 data link
  • SINCGARS
  • An IFF interrogator and transponder
  • HAVE QUICK
  • AM, VHF, UHF AM, and UHF FM Radio
  • GUARD survival radio
  • A radar altimeter
  • An instrument landing system
  • A TACAN system
  • Instrument carrier landing system
  • A JPALS
  • TADIL-J JVMF/VMF

Differences between variants

	F-35A CTOL	F-35B STOVL	F-35C CV CATOBAR
Length	51.4 ft (15.7 m)	51.2 ft (15.6 m)	51.5 ft (15.7 m)
Wingspan	35 ft (10.7 m)	35 ft (10.7 m)	43 ft (13.1 m)
Height	14.4 ft (4.39 m)	14.3 ft (4.36 m)	14.7 ft (4.48 m)
Wing Area	460 sq ft (42.74 m2)	460 sq ft (42.74 m2)	668 sq ft (62.06 m2)
Empty weight	28,999 lb (13,154 kg)	32,472 lb (14,729 kg)	34,581 lb (15,686 kg)
Internal fuel	18,250 lb (8,278 kg)	13,500 lb (6,123 kg)	19,750 lb (8,958 kg)
Weapons payload	18,000 lb (8,160 kg)	15,000 lb (6,800 kg)	18,000 lb (8,160 kg)
Max takeoff weight	70,000 lb (31,800 kg) class	60,000 lb (27,200 kg) class	70,000 lb (31,800 kg) class
Range	>1,200 nmi (2,200 km)	>900 nmi (1,700 km)	>1,200 nmi (2,200 km)
Combat radius on internal fuel	669 nmi (1,239 km)	505 nmi (935 km)	670 nmi (1,241 km)
Thrust/weight  • full fuel:  • 50% fuel:	0.87 1.07	0.90 1.04	0.75 0.91
g limit	+9.0	+7.0	+7.5

Appearances in media

Main article: Aircraft in fiction § F-35 Lightning II

See also

• Aviation portal

Related development

• Lockheed Martin X-35 – Concept demonstrator aircraft for Joint Strike Fighter program

Aircraft of comparable role, configuration, and era

• Chengdu J-20 – Chinese fifth-generation fighter aircraft
• HAL AMCA – Indian fifth-generation fighter under development by Aeronautical Development Agency and Hindustan Aeronautics Limited
• KAI KF-21 Boramae – Advanced multirole fighter aircraft under development by South Korea and Indonesia
• Lockheed Martin F-22 Raptor – American fifth-generation air superiority fighter
• Shenyang J-35 – Chinese fifth-generation fighter aircraft
• Sukhoi Su-57 – Russian fifth-generation fighter aircraft
• Sukhoi Su-75 Checkmate – Russian single engine fifth-generation fighter under development by Sukhoi
• TAI TF Kaan – Turkish fifth-generation fighter under development by Turkish Aerospace Industries

Related lists

• List of fighter aircraft
• List of active United States military aircraft
• List of megaprojects, Aerospace
• List of military electronics of the United States

Notes

1. As of August 2023^[update], the program was 80% over budget and 10 years late.^[9]
2. Lockheed acquired General Dynamics fighter division at Fort Worth in 1993 and merged with Martin Marietta in 1995 to form Lockheed Martin.
3. As these were concept demonstrator aircraft for risk reduction, they did not need to have the internal structure or most subsystems of the final aircraft as a weapon system.
4. The F-35 swivel nozzle design was pioneered by the Convair Model 200.^[23]
5. The thrust vectoring nozzle would eventually be replaced by an axisymmetric low-observable nozzle to reduce weight.
6. FACO is also performed in Italy and Japan for some partner and export customers as part of the industrial benefits from international cooperation.
7. This first prototype lacked the weight optimization from SWAT.
8. Early F-35Bs have a service life as low as 2,100 hours before retrofits as seen on Lot 9 and later aircraft.
9. Adaptive cycle engine technology had been under development under Air Force Life Cycle Management Center's (AFLCMC) Adaptive Engine Transition Program (AETP) and its precursors.
10. Turkey was the sole supplier of several F-35 parts, thus forcing the program to find replacement vendors.^[91]
11. The F-35C has additional ailerons at the folding sections of the wings.
12. In 2014, Michael Gilmore, Director of Operational Test & Evaluation, stated that "software development, integration in the contractor labs, and delivery of mature capability to flight test continued to be behind schedule."^[119]
13. Rockwell Collins and Elbit Systems formed the joint venture Vision Systems International (VSI), later renamed Collins Elbit Vision Systems (CEVS).
14. In 2002, solid-state laser weapons were reportedly being developed for the F-35.^{[191][192][193]}
15. "Bubbling and blistering" of the horizontal tails and tail booms were observed once during flutter tests of the F-35B and C in late 2011; according to the program office, the problem has only occurred once despite numerous attempts to replicate it, and an improved spray-on coating has been implemented since as a mitigation measure. On 17 December 2019, the Pentagon program office closed the issue with no further actions planned, and instead is imposing a time limit on high-speed flight for the F-35B and C to reduce the risk of damaging the stealth coatings and antennas located on the back of the aircraft.^[242][243]
16. Wing drop is an uncommanded roll that can occur during high-g transsonic maneuvering.
17. F-35B and F-35C have the cannon in an external pod with 220 rounds.

References

1. Finnerty, Ryan (19 January 2024). "Lockheed completes assembly of 1,000th F-35". FlightGlobal. Archived from the original on 18 January 2024. Retrieved 19 January 2024.
2. Drew, James (31 July 2015). "First operational F-35 squadron declared ready for combat". FlightGlobal. Archived from the original on 4 December 2020.
3. Insinna, Valerie (2 August 2016). "Air Force Declares F-35A Ready for Combat". Defense News.
4. Eckstein, Megan (28 February 2019). "Navy Declares Initial Operational Capability for F-35C Joint Strike Fighter". USNI News.
5. "F-35 Global Partnerships". Lockheed Martin. Archived from the original on 2 September 2012. Retrieved 31 October 2012.
6. Dudley, Richard (5 March 2012). "Program Partners Confirm Support for F-35 Joint Strike Fighter". Defence Update.
7. Pawlyk, Oriana (28 December 2020). "Key US Ally Declares Its F-35s Ready for Combat". Military.com. 10th paragraph. Retrieved 29 December 2020.
8. Boehm, Eric (26 April 2022). "The $1.7 Trillion F-35 Fighter Jet Program Is About To Get More Expensive". reason.com. Reason. Retrieved 27 April 2022.
9. "Lockheed Martin's $1.7 trillion F-35 fighter jet is 10 years late and 80% over budget—and it could be one of the Pentagon's biggest success stories". Fortune. 2 August 2023. Retrieved 30 November 2024.
10. Miller, Kathleen; Capaccio, Tony & Ivory, Danielle (22 February 2013). "Flawed F-35 Too Big to Kill as Lockheed Hooks 45 States". Bloomberg L.P.
11. Ciralsky, Adam (16 September 2013). "Will the F-35, the U.S. Military's Flaw-Filled, Years-Overdue Joint Strike Fighter, Ever Actually Fly?". Vanity Fair. Retrieved 29 September 2015.
12. "F-35's price might rise, Lockheed warns". Defense One. 25 July 2024. Retrieved 30 November 2024.
13. Ahronheim, Anna (22 May 2018). "IAF Commander: Israel First To Use F-35 Jet In Combat". The Jerusalem Post.
14. "Select Acquisition Report: F-35 Lightning II Joint Strike Fighter (JSF) Program (F-35) as of FY 2020 President's Budget" (PDF). Washington Headquarters Services. 17 April 2019. Archived from the original (PDF) on 6 June 2020. Retrieved 5 February 2020.
15. "US European Command/NATO May Have 450 F-35s by 2030". Aviation Today. 14 June 2021.
16. Drew, James (25 March 2016). "Lockheed F-35 service life extended to 2070". FlightGlobal.
17. Rich, Stadler (October 1994). "Common Lightweight Fighter" (PDF). Code One Magazine. Lockheed. Archived (PDF) from the original on 29 January 2020.
18. "History (Pre-JAST)". Joint Strike Fighter. Archived from the original on 6 December 2019. Retrieved 24 January 2020.
19. "History (JAST)". Joint Strike Fighter. Archived from the original on 15 July 2019. Retrieved 24 January 2020.
20. Barrie, Douglas; Norris, Guy & Warwick, Graham (4 April 1995). "Short take-off, low funding". FlightGlobal. Archived from the original on 17 July 2015. Retrieved 24 January 2020.
21. "The JSF UK Industry Team". Martin Baker Aircraft Company Limited. Archived from the original on 27 April 2006.
22. "US, UK sign JAST agreement". Aerospace Daily. New York: McGraw-Hill. 25 November 1995. p. 451.
23. Renshaw, Kevin (12 August 2014). "F-35B Lightning II Three-Bearing Swivel Nozzle". Code One Magazine.
24. Wilson, George C. (22 January 2002). "The engine that could". Government Executive. Archived from the original on 19 October 2013.
25. "Propulsion system for a vertical and short takeoff and landing aircraft, United States Patent 5209428". PatentGenius.com. 7 May 1990. Archived from the original on 25 February 2012.
26. Gunston, Bill (1997). Yakovlev Aircraft since 1924. London: Putnam Aeronautical Books. p. 16. ISBN 1-55750-978-6.
27. Welt, Flying (29 October 2023). "Lockheed Martin F-35 Lightning II: Top 10 things to know". Flying Welt. Retrieved 21 November 2023.
28. Sheridan, Arthur E.; Burnes, Robert (13 August 2019). "F-35 Program History: From JAST to IOC". American Institute of Aeronautics and Astronautics (AIAA): 50. doi:10.2514/5.9781624105678.0001.0076. ISBN 978-1-62410-566-1.
29. Bevilaqua, Paul M. (September 2005). "Joint Strike Fighter Dual-Cycle Propulsion System". Journal of Propulsion and Power. 21 (5): 778–783. doi:10.2514/1.15228. ISSN 0748-4658.
30. "History (JSF)". Joint Strike Fighter. Archived from the original on 15 July 2019. Retrieved 24 January 2020.
31. Schreiber, Liev (3 February 2003). "Battle of the X-Planes". NOVA. PBS. Archived from the original on 29 June 2019. Battle of the X-Planes. Retrieved 25 January 2020.
32. "History (F-35 Acquisition)". Joint Strike Fighter. Archived from the original on 6 July 2019. Retrieved 23 January 2021.
33. Parsch, Andreas (27 April 2006). "Non-Standard DOD Aircraft Designations". Designation Systems.
34. Keijsper 2007, pp. 122, 124.
35. Hehs, Eric (15 May 2008). "X to F: F-35 Lightning II And Its X-35 Predecessors". Code One Magazine. Lockheed Martin.
36. Keijsper 2007, p. 119
37. Norris, Guy (13 August 2010). "Alternate JSF Engine Thrust Beats Target". Aviation Week.
38. Fulghum, David A.; Wall, Robert (19 September 2004). "USAF Plans for Fighters Change". Aviation Week & Space Technology.
39. Keijsper 2007, p. 124,
40. Pappalardo, Joe (November 2006). "Weight Watchers: How a team of engineers and a crash diet saved the Joint Strike Fighter". Air & Space Magazine. Archived from the original on 25 May 2014.
41. Knotts, Keith P. (9 July 2013). "CF-35 Lightning II: Canada's Next Generation Fighter" (PDF). Westdef.com. Archived from the original (PDF) on 21 February 2014.
42. "'Lightning II' moniker given to Joint Strike Fighter". U.S. Air Force. 7 June 2006.
43. Rogoway, Tyler (17 May 2018). "The Air Force's Elite Weapons School Has Given The F-35 A New Nickname". The War Zone. Archived from the original on 13 August 2018.
44. Tegler, Eric (30 December 2023). "5 Things That Happened In 2023 - The Fighter Pilot's Quick-Take". Forbes.
45. @nellisafb (25 April 2024). "It's World Penguin day! Here are some awesome shots of the F-35 Lightning II, a.k.a. "Battle Penguin"" – via Instagram.
46. "F-35 Software Development". Lockheed Martin. Archived from the original on 2 July 2020. Retrieved 2 February 2020.
47. "GAO-06-356: DOD Plans to Enter Production before Testing Demonstrates Acceptable Performance" (PDF). Government Accountability Office. March 2006. Archived from the original (PDF) on 1 August 2020. Retrieved 4 December 2011.
48. Insinna, Valerie (28 April 2018). "F-35 program office wraps up final developmental flight test". Defense News.
49. Haynes, Deborah (15 June 2019). "F-35 jets: Chinese-owned company making parts for top-secret UK-US fighters". Sky News.
50. Doffman, Zak (15 June 2019). "U.S. and U.K. F-35 Jets Include 'Core' Circuit Boards From Chinese-Owned Company". Forbes.
51. Minnick, Wendell (24 March 2016). "Chinese Businessman Pleads Guilty of Spying on F-35 and F-22". Defense News. Retrieved 9 April 2019.
52. Cox, Bob (1 March 2010). "Internal Pentagon memo predicts that F-35 testing won't be complete until 2016". Fort Worth Star-Telegram.
53. Capaccio, Tony (6 January 2010). "Lockheed F-35 Purchases Delayed in Pentagon's Fiscal 2011 Plan". Bloomberg BusinessWeek. Archived from the original on 10 January 2010.
54. Charette, Robert (12 September 2012). "F-35 Program Continues to Struggle with Software". IEEE Spectrum.
55. "FY18 DOD Programs F-35 Joint Strike Fighter (JSF)" (PDF). Director, Operational Test and Evaluation. 2018. p. 25. Archived from the original (PDF) on 26 June 2019.
56. "Is the F-35 worth it?". 60 Minutes. 16 February 2014. CBS News.
57. Tirpak, John (14 March 2016). "All For One and One for All". Air Force.
58. Shalal, Andrea (27 April 2015). "U.S. watchdog finds quality violations in Pratt work on F-35 engine". Reuters.
59. Barrett, Paul (10 April 2017). "Danger Zone". Bloomberg Businessweek. pp. 50–55.
60. Leonard, Christopher. "Lockheed Martin's $1.7 trillion F-35 fighter jet is 10 years late and 80% over budget—and it could be one of the Pentagon's biggest success stories". Fortune. Retrieved 1 December 2024.
61. Schneider, Greg (27 October 2001). "Lockheed Martin Beats Boeing for Fighter Contract". The Washington Post.
62. Dao, James (27 October 2001). "Lockheed Wins $200 Billion Deal for Fighter Jet". The New York Times.
63. Merle, Renae (15 March 2005). "GAO Questions Cost Of Joint Strike Fighter". The Washington Post.
64. Shalal-Esa, Andrea (17 September 2012). "Pentagon tells Lockheed to shape up on F-35 fighter". Reuters.
65. Tirpak, John A. (8 January 2014). "The Cost of Teamwork". Air Force. Arlington, Virginia: Air Force Association. Archived from the original on 25 May 2014. Retrieved 12 January 2014.
66. Capaccio, Anthony (10 July 2017). "F-35 Program Costs Jump to $406.5 Billion in Latest Estimate". Bloomberg.
67. Astore, William J. (16 September 2019). "The Pentagon's $1.5 Trillion Addiction to the F-35 Fighter". The Nation. Archived from the original on 6 December 2019. Retrieved 30 October 2019.
68. Tirpak, John (29 October 2019). "Massive $34 Billion F-35 Contract Includes Price Drop as Readiness Improves". Air Force.
69. "F-35 Joint Strike Fighter Development Is Nearly Complete, but Deficiencies Found in Testing Need to Be Resolved" (PDF). GAO. June 2018. Archived (PDF) from the original on 6 June 2018. Retrieved 12 June 2019.
70. Insinna, Valerie (12 March 2024). "Pentagon finally approves F-35 for full rate production after 5-year delay". Breaking Defense.
71. Insinna, Valerie (6 December 2019). "After a couple months delay, the F-35 moves into operational tests". Defense News.
72. Tirpak, John (25 February 2019). "Keeping the F-35 Ahead of the Bad Guys". Air Force.
73. "Lockheed Martin Awarded $1.8 Billion for F-35 Block 4 Development". Defense World. 8 June 2019. Archived from the original on 31 July 2020. Retrieved 25 June 2024.
74. Tegler, Eric. "International F-35 Customers, Your Airplanes Will Be Delayed". Forbes.
75. Zazulia, Nick (19 March 2019). "U.S. Defense Department Plans to Spend $6.6B on F-35 Continuing Development Through 2024". Avionics International.
76. Trimble, Steven (9 July 2018). "USAF starts work on defining adaptive engine for future fighter". FlightGlobal. Archived from the original on 11 January 2020.
77. "USAF Launches F-35 Advanced Engine Effort". Janes. 31 January 2022.
78. Marrow, Michael (13 March 2023). "Air Force will not develop new F-35 engine, keeping Pratt as sole contractor". Breaking Defense.
79. Decker, Audrey (13 July 2023). "F-35 test squadron works to wring out upgrade problems". Defense One. Retrieved 17 April 2024.
80. Losey, Stephen (21 July 2024). "F-35 deliveries resume, but upgrade delays have ripple effects". Defense News. Retrieved 6 October 2024.
81. Warwick, Graham (12 September 2013). "Northrop Develops Laser Missile Jammer For F-35". Aviation Week. Archived from the original on 20 April 2014. Retrieved 2 February 2020.
82. "Israel Wants To Put New Equipment Inside The F-35: Exclusive Q&A With Top Officer". 21 September 2021.^{[permanent dead link‍]}
83. "Estimated JSF Air Vehicle Procurement Quantities" (PDF). Joint Strike Fighter. April 2010. Archived from the original (PDF) on 27 June 2011.
84. "F-35 Lightning: The Joint Strike Fighter Program, 2012". Defense Industry Daily. 30 October 2012. Archived from the original on 25 January 2013.
85. Schnasi, Katherine V. (May 2004). "Joint Strike Fighter Acquisition: Observations on the Supplier Base" (PDF). US General Accounting Office. Archived from the original (PDF) on 16 August 2020. Retrieved 8 February 2006.
86. "Industry Canada F-35 Joint Strike Fighter (JSF) Canada's Next Generation Fighter Capability". Government of Canada. 18 November 2002. Archived from the original on 22 September 2010. Retrieved 25 November 2010.
87. Combat Aircraft Monthly, September 2010, p. 24.
88. Winters, Vice Adm. Mat (9 December 2018). "Head of F-35 Joint Program Office: Stealth fighter enters the new year in midst of a growing phase". Defense News. Retrieved 5 February 2020.
89. Manson, Katrina; Pitel, Laura (19 June 2018). "US Senate blocks F-35 sales to Turkey". Financial Times. Archived from the original on 10 December 2022. Retrieved 19 June 2018.
90. Liptak, Kevin; Gaouette, Nicole (17 July 2019). "Trump blames Obama as he reluctantly bans F-35 sales to Turkey". CNN. Retrieved 17 July 2019.
91. Host, Pat (1 October 2018). "F-35 chief reaffirms Turkey's status as committed programme partner". Jane's 360. Archived from the original on 3 October 2018.
92. "Capabilities: F-35 Lightning II". Lockheed Martin. Archived from the original on 24 July 2010.
93. Kent, John R.; Geisel, Chris (16 November 2010). "F-35 STOVL supersonic". Lockheed Martin.
94. "Open System Architecture (OSA) Secure Processing" (PDF). L3 Technologies. March 2011. Archived from the original (PDF) on 4 November 2016.
95. Adams, Charlotte (1 September 2003). "JSF: Integrated Avionics Par Excellence". Aviation Today. Archived from the original on 16 November 2016. Retrieved 25 October 2015.
96. Amaani, USAF Tech. Sgt. Lyle (3 April 2009). "Air Force takes combat air acquisitions priorities to Hill". U.S. Air Force. Archived from the original on 18 October 2023.
97. CFD predictions of wing pressure distributions on the F-35 at angles-of-attack for transonic maneuvres AIAA 2007 4433
98. Ryberg, Eric S. (26 February 2002). "The Influence of Ship Configuration on the Design of the Joint Strike Fighter" (PDF). Naval Surface Warfare Center Dahlgren Division. p. 5. Archived (PDF) from the original on 9 December 2016. Retrieved 1 December 2013.
99. Whittle, Richard (February 2012). "The Ultimate Fighter?". Air & Space/Smithsonian Magazine. Archived from the original on 30 September 2023. Retrieved 24 February 2013.
100. Hehs, Eric (15 July 2000). "JSF Diverterless Supersonic Inlet". Code One Magazine. Archived from the original on 30 September 2023. Retrieved 28 December 2012.
101. Sloan, Jeff (19 October 2009). "Skinning the F-35 fighter". Composites World. Archived from the original on 23 October 2023. Retrieved 24 November 2016.
102. "Contract Awarded To Validate Process For JSF". Aerospace Manufacturing and Design. 17 May 2010. Archived from the original on 14 March 2012.
103. Trimble, Stephen (26 May 2011). "Lockheed Martin reveals F-35 to feature nanocomposite structures". FlightGlobal. Archived from the original on 30 May 2011.
104. Nativi, Andy (5 March 2009). "F-35 Air Combat Skills Analyzed". Aviation Week. Archived from the original on 26 December 2010.
105. Crébas, Frank (May 2018). "F-35 – Out of the Shadows". Combat Aircraft Monthly. Key Publishing. Archived from the original on 10 March 2021. Retrieved 8 February 2020.
106. "The F-35's Race Against Time". Air & Space Forces Magazine. Retrieved 7 June 2024.
107. "Flying The F-35: An Interview With Jon Beesley, F-35 Chief Test Pilot". Lockheed Martin. Archived from the original on 18 December 2014. Retrieved 25 November 2010.
108. Seligman, Lara (1 March 2016). "Norwegian F-35 Pilot Counters Controversial Dogfighting Report". Defense News. Archived from the original on 26 November 2017.
109. "F-35 Lightning II Program Status and Fast Facts" (PDF). F-35.ca. Lockheed Martin. 13 March 2012. Archived from the original (PDF) on 24 May 2013.
110. George, Eric (1 May 2010). "F-35 avionics: an interview with the Joint Strike Fighter's director of mission systems and software". Military & Aerospace Electronics (Interview). Vol. 21, no. 5. PennWell Corporation. Archived from the original on 1 January 2016.
111. Sherman, Ron (1 July 2006). "F-35 Electronic Warfare Suite: More Than Self-Protection". Aviation Today. Archived from the original on 18 October 2023. Retrieved 4 August 2010.
112. Robb, John H. (11 February 2001). "Hey C and C++ Can Be Used In Safety Critical Applications Too!". Journal of Cyber Security and Information Systems. Archived from the original on 16 February 2013.
113. Warwick, Graham (7 June 2010). "Flight Tests Of Next F-35 Mission-System Block Underway". Aviation Week. Archived from the original on 10 October 2023.
114. "Raytheon Selects RACE++ Multicomputers for F-35 Joint Strike Fighter". EmbeddedStar.com. Archived from the original on 27 October 2015. Retrieved 25 October 2015.
115. McHale, John (1 February 2010). "F-35 Joint Strike Fighter leverages COTS for avionics systems". Military & Aerospace Electronics. PennWell Corporation. Archived from the original on 21 September 2013.
116. Philips, E. H. (5 February 2007). "The Electric Jet". Aviation Week & Space Technology.
117. Parker, Ian (1 June 2007). "Reducing Risk on the Joint Strike Fighter". Aviation Today. Archived from the original on 18 October 2023. Retrieved 8 July 2007.
118. Keller, John (16 June 2013). "Tens of thousands of Xilinx FPGAs to be supplied by Lockheed Martin for F-35 Joint Strike Fighter avionics". Intelligent Aerospace. Archived from the original on 12 January 2014. Retrieved 16 June 2013.
119. FY2013 DOD PROGRAMS F-35 Joint Strike Fighter (JSF)
120. Reed, John (23 November 2010). "Schwartz Concerned About F-35A Delays". DoD Buzz. Archived from the original on 26 November 2010.
121. Lyle, Amaani (6 March 2014). "Program executive officer describes F-35 progress". U.S. Air Force. Archived from the original on 18 October 2023.
122. "APG-81 (F-35 Lightning II)". Northrop Grumman Electronic Systems. Archived from the original on 23 January 2013. Retrieved 4 August 2007.
123. "F-35 Distributed Aperture System (EO DAS)". Northrop Grumman. Archived from the original on 2 April 2010. Retrieved 6 April 2010.
124. Lemons, Greg; Carrington, Karen; Frey, Dr. Thomas; Ledyard, John (24 June 2018). "F-35 Mission Systems Design, Development, and Verification" (PDF). American Institute of Aeronautics and Astronautics. doi:10.2514/6.2018-3519. ISBN 978-1-62410-556-2. S2CID 115841087. Archived (PDF) from the original on 26 May 2019. Retrieved 1 February 2020.
125. "Lockheed Martin Missiles and Fire Control: Joint Strike Fighter Electro-Optical Targeting System". Lockheed Martin. Archived from the original on 6 January 2009. Retrieved 11 April 2008.
126. "ASQ242 Datasheet" (PDF). Northrop Grumman. Archived from the original (PDF) on 23 February 2014.
127. "F-35 jet fighters to take integrated avionics to a whole new level". Military & Aerospace Electronics. PennWell Corporation. 1 May 2003.
128. "Israel, US Negotiate $450 Million F-35I Avionic Enhancements". Defense Update. 27 July 2012. Archived from the original on 30 July 2012.
129. Donald, David (17 June 2019). "F-35 Looks to the Future". Aviation International News. Archived from the original on 1 October 2023. Retrieved 1 February 2020.
130. Drew, James (10 September 2015). "Lockheed reveals Advanced EOTS targeting sensor for F-35 Block 4". FlightGlobal. Archived from the original on 25 February 2020.
131. Abbott, Rich (18 June 2018). "Raytheon Picked to Produce F-35 Sensor". Aviation Today. Archived from the original on 20 March 2023.
132. Clark, Colin (15 December 2014). "Pawlikowski On Air Force Offset Strategy: F-35s Flying Drone Fleets". Breaking Defense. Archived from the original on 18 October 2023.
133. Helfrich, Emma (3 January 2023). "F-35 Will Get New Radar Under Massive Upgrade Initiative". The Drive. Archived from the original on 19 January 2024. Retrieved 4 January 2023.
134. "Fast History: Lockheed's Diverterless Supersonic Inlet Testbed F-16". Aviation Intel. 22 October 2012. Archived from the original on 7 September 2013.
135. Tirpak, John A. (26 November 2014). "The F-35 on Final Approach". Air & Space Forces Magazine. Archived from the original on 25 June 2023. Retrieved 1 February 2020.
136. Clark, Colin (11 March 2015). "Threat Data Biggest Worry For F-35A's IOC; But It 'Will Be On Time'". Breaking Defense. Archived from the original on 18 October 2023. Retrieved 31 March 2015.
137. Clark, Colin (6 June 2014). "Gen. Mike Hostage On The F-35; No Growlers Needed When War Starts". Breaking Defense. Archived from the original on 11 June 2023.
138. Butler, Amy (17 May 2010). "New, Classified Stealth Concept Could Affect JSF Maintenance Costs". Aviation Week. Archived from the original on 10 March 2021.
139. "USAF FY00 activity on the JSF". Director, Operational Test & Evaluation. Archived from the original on 23 July 2011.
140. "Request for Binding Information Response to the Royal Norwegian Ministry of Defence" (PDF). Lockheed Martin. April 2008. Archived from the original (PDF) on 12 October 2012 – via Government.no.
141. Capaccio, Tony (4 May 2011). "Lockheed Martin's F-35 Fighter Jet Passes Initial Stealth Hurdle". Bloomberg. Archived from the original on 25 February 2015.
142. "F-35 – Beyond Stealth". Defense-Update. 14 June 2015. Archived from the original on 18 October 2023. Retrieved 5 April 2019.
143. Ralston, James; Heagy, James; Sullivan, Roger (September 1998). "Environmental/Noise Effects on UHF/VHF UWB SAR" (PDF). Defense Technical Information Center. Archived (PDF) from the original on 2 January 2015. Retrieved 2 January 2015.
144. Plopsky, Guy; Bozzato, Fabrizio (21 August 2014). "The F-35 vs. The VHF Threat". The Diplomat. Archived from the original on 6 June 2023.
145. Brewer, Jeffrey; Meadows, Shawn (Summer 2006). "Survivability of the Next Strike Fighter". Aircraft Survivability: Susceptibility Reduction. Joint Aircraft Survivability Program Office. p. 23. Archived from the original on 1 December 2012. Retrieved 22 November 2010 – via Defense Technical Information Center.
146. Lockie, Alex (5 May 2017). "This strange mod to the F-35 kills its stealth near Russian defenses – and there's good reason for that". Business Insider. Archived from the original on 25 December 2023.
147. Alaimo, Carol Ann (30 November 2008). "Noisy F-35 Still Without A Home". Arizona Daily Star. Archived from the original on 7 April 2023.
148. "Report on Jet Engine Noise Reduction" (PDF). Naval Research Advisory Committee. April 2009. Archived (PDF) from the original on 31 July 2020. Retrieved 31 May 2022.
149. "F-35 Acoustics Based on Edwards AFB Acoustics, Test". JSF Program Office & Lockheed Martin. April 2009.
150. "F-35, F-16 noise difference small, Netherlands study shows". Aviation Week. 31 May 2016.
151. Ledbetter, Stewart (31 May 2019). "Wonder no more: F-35 jet noise levels finally confirmed at BTV". NBC News. Archived from the original on 29 May 2023.
152. Hensley, Senior Airman James (19 May 2015). "F-35 pilot training begins at Luke". U.S. Air Force. Archived from the original on 5 April 2023. Retrieved 30 January 2020.
153. Schutte, John (10 October 2007). "Researchers fine-tune F-35 pilot-aircraft speech system". U.S. Air Force Materiel Command. Archived from the original on 22 January 2024. Retrieved 26 January 2024.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
154. "VSI's Helmet Mounted Display System flies on Joint Strike Fighter". Rockwell Collins. 10 April 2007. Archived from the original on 17 July 2011.
155. "Martin-Baker". The JSF UK Industry Team. Archived from the original on 21 October 2008. Retrieved 23 November 2009.
156. Lowell, Capt. Jonathan (25 August 2019). "Keeping cool over Salt Lake". U.S. Air Force. Archived from the original on 13 August 2023. Retrieved 30 January 2020.
157. Zazulia, Nick (24 August 2018). "F-35: Under the Helmet of the World's Most Advanced Fighter". Avionics International. Archived from the original on 27 December 2023.
158. Davis, Brigadier General Charles R. (26 September 2006). "F-35 Program Brief" (PDF). U.S. Air Force. Archived from the original (PDF) on 25 July 2020 – via Joint Strike Fighter.
159. "F-35 Distributed Aperture System EO DAS". YouTube (Video). F35JSFVideos. 4 May 2009. Archived from the original on 17 November 2009. Retrieved 23 November 2009.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
160. Davenport, Christian (1 April 2015). "Meet the most fascinating part of the F-35: The $400,000 helmet". The Washington Post. Archived from the original on 1 April 2015. Retrieved 2 August 2015.
161. Seligman, Lara (14 October 2015). "F-35's Heavier Helmet Complicates Ejection Risks". Defense News. Archived from the original on 17 November 2017.
162. "Lockheed Martin Awards F-35 Contract". Zack's Investment Research. 17 November 2011. Archived from the original on 30 April 2012.
163. Warwick, Graham (21 April 2011). "Lockheed Weighs Alternate F-35 Helmet Display". Aviation Week.
164. Carey, Bill (15 February 2012). "BAE Drives Dual Approach To Fixing F-35 Helmet Display Issues". Aviation International News. Archived from the original on 27 January 2023. Retrieved 16 February 2012.
165. "Lockheed Martin Selects BAE Systems to Supply F-35 Joint Strike Fighter (JSF) Helmet Display Solution". BAE Systems. 10 October 2011. Archived from the original on 18 October 2023.
166. Majumdar, Dave (10 October 2013). "F-35 JPO drops development of BAE alternative helmet". FlightGlobal. Archived from the original on 29 April 2014.
167. Williams, Dan (30 October 2012). "Lockheed Cites Good Reports on Night Flights of F-35 Helmet". Reuters. Archived from the original on 24 September 2015. Retrieved 1 July 2017.
168. Eshel, Noam (25 August 2010). "Small Diameter Bomb II – GBU-53/B". Defense Update. Archived from the original on 24 September 2023. Retrieved 28 August 2010.
169. "F-35B STOVL Variant". Lockheed Martin. Archived from the original on 23 February 2009. Retrieved 25 November 2010.
170. "Spear Capability 3". MBDA Systems. 9 June 2019. Archived from the original on 11 May 2023. This new, F-35 Lightning II internal bay compatible, air-to-surface missile
171. Marrow, Michael (8 March 2024). "F-35A officially certified to carry nuclear bomb". Breaking Defense.
172. Keller, John (17 August 2018). "Navy asks BAE Systems to build T-1687/ALE-70(V) electronic warfare (EW) towed decoys for F-35". Military Aerospace Electronics. Archived from the original on 22 January 2024.
173. Keijsper 2007, pp. 220, 239.
174. Hewson, Robert (4 March 2008). "UK changes JSF configuration for ASRAAM". Jane's. Archived from the original on 16 September 2012.
175. Tran, Pierre (22 February 2008). "MBDA Shows Off ASRAAM". Defense News.
176. "JSF Suite: BRU-67, BRU-68, LAU-147 – Carriage Systems: Pneumatic Actuated, Single Carriage". ITT.com. 2009.^{[dead link‍]}
177. Digger, Davis (30 October 2007). "JSF Range & Airspace Requirements" (PDF). Headquarters Air Combat Command. Archived from the original (PDF) on 19 December 2008 – via Defense Technical Information Center.
178. "F-35 gun system". General Dynamics Armament and Technical Products. Archived from the original on 6 June 2011.{{cite web}}: CS1 maint: unfit URL (link)"GAU-22/A" (PDF). General Dynamics Armament and Technical Products. Archived from the original on 17 July 2011.{{cite web}}: CS1 maint: unfit URL (link) Retrieved 7 April 2011.
179. Capaccio, Tony (30 January 2020). "The Gun On the Air Force's F-35 Has 'Unacceptable' Accuracy". Bloomberg. Retrieved 25 March 2024.
180. Trevithick, Joseph (22 March 2024). "F-35A's Beleaguered 25mm Cannon Is Finally "Effective"". The War Zone. Retrieved 25 March 2024.
181. Keijsper 2007, p. 233.
182. Donald, David (11 July 2012). "Terma Highlights F-35 Multi-Mission Pod". Aviation International News. Archived from the original on 11 October 2023.
183. Bolsøy, Bjørnar (17 September 2009). "F-35 Lightning II status and future prospects". F-16.net. Archived from the original on 28 December 2023. Retrieved 23 November 2009.^{[unreliable source?]}
184. Everstine, Brian W. (17 June 2019). "Lockheed Looking at Extending the F-35's Range, Weapons Suite". Air & Space Forces Magazine. Archived from the original on 28 May 2023. Retrieved 31 January 2020.
185. Lake 2010, pp. 37–45.
186. Trimble, Stephen (17 September 2010). "MBDA reveals clipped-fin Meteor for F-35". FlightGlobal. Archived from the original on 21 September 2010.
187. Drew, James (25 February 2015). "F-35B Internal Weapons Bay Can't Fit Required Load of Small Diameter Bomb IIs". Inside Defense.com. Archived from the original on 18 October 2023.
188. "Air Force President's Budget FY20". Assistant Secretary of the Air Force, Financial Management and Comptroller.
189. "Important cooperative agreement with Lockheed Martin". Kongsberg Defence & Aerospace. 9 June 2009. Archived from the original on 14 April 2012.
190. "A Hypersonic Missile That's More Than Ready" (Press release). Lockheed Martin. 22 July 2024.
191. Fulghum, David A. (8 July 2002). "Lasers being developed for F-35 and AC-130". Aviation Week and Space Technology. Archived from the original on 26 June 2004.
192. Morris, Jefferson (26 September 2002). "Keeping cool a big challenge for JSF laser, Lockheed Martin says". Aerospace Daily. Archived from the original on 4 June 2004.
193. Fulghum, David A. (22 July 2002). "Lasers, HPM weapons near operational status". Aviation Week and Space Technology. Archived from the original on 13 June 2004.
194. Norris, Guy (20 May 2013). "High-Speed Strike Weapon To Build On X-51 Flight". Aviation Week. Archived from the original on 20 May 2013.
195. Drew, James (5 October 2015). "Lockheed considering laser weapon concepts for F-35". FlightGlobal. Archived from the original on 31 October 2020.
196. Parsons, Dan (15 February 2015). "USAF chief keeps sights on close air support mission". FlightGlobal. Archived from the original on 20 February 2020.
197. "Long Road Ahead For Possible A-10 Follow-On". Aviation Week. 24 March 2015. Archived from the original on 18 October 2023.
198. "Frequently Asked Questions about JSF". Joint Strike Fighter. Archived from the original on 1 August 2010. Retrieved 6 April 2010.
199. Warwick, Graham (17 March 2011). "Screech, the F135 and the JSF Engine War". Aviation Week. Archived from the original on 21 March 2010. Retrieved 20 December 2017.
200. Katz, Dan (7 July 2017). "The Physics And Techniques Of Infrared Stealth". Aviation Week. Archived from the original on 18 October 2023. Retrieved 12 April 2019.
201. Majumdar, Dave (1 October 2012). "US Navy works through F-35C air-ship integration issues". FlightGlobal. Archived from the original on 2 February 2020. Retrieved 1 February 2020.
202. Chris Wiegand; Bruce A. Bullick; Jeffrey A. Catt; Jeffrey W. Hamstra; Greg P. Walker; Steve Wurth (13 August 2019). "F-35 Air Vehicle Technology Overview". American Institute of Aeronautics and Astronautics (AIAA). Progress in Astronautics and Aeronautics. 257: 121–160. doi:10.2514/5.9781624105678.0121.0160. ISBN 978-1-62410-566-1.
203. "Custom tool to save weeks in F-35B test and evaluation". U.S. Naval Air Systems Command. 6 May 2011. Archived from the original on 22 January 2024. Retrieved 1 March 2021.
204. Zolfagharifard, Ellie (28 March 2011). "Rolls-Royce's LiftSystem for the Joint Strike Fighter". The Engineer. Archived from the original on 19 December 2013. Retrieved 18 April 2011.
205. "LiftSystem". Rolls-Royce. Archived from the original on 3 July 2023. Retrieved 23 November 2009.
206. "Swivel nozzle VJ101D and VJ101E". Vertical Flight Society. 20 June 2009.
207. Hirschberg, Mike (1 November 2000). "V/STOL Fighter Programs in Germany: 1956–1975" (PDF). International Powered Lift Conference. p. 50. Archived (PDF) from the original on 27 October 2013. Retrieved 3 October 2012 – via robertcmason.com.
208. "How the Harrier hovers". Harrier.org. Archived from the original on 7 July 2010. Retrieved 16 November 2010.
209. Kjelgaard, Chris (21 December 2007). "From Supersonic to Hover: How the F-35 Flies". Space.com. Archived from the original on 26 September 2023.
210. Hutchinson, John. "Going Vertical: Developing a STOVL system" (PDF). Ingenia.org.uk. Archived from the original (PDF) on 20 July 2015. Retrieved 23 November 2009.
211. "GE Rolls-Royce Fighter Engine Team completes study for Netherlands". Rolls-Royce plc. 16 June 2009. Archived from the original on 22 January 2024. Retrieved 23 November 2009.
212. Trimble, Stephen (11 June 2009). "Rolls-Royce: F136 survival is key for major F-35 engine upgrade". FlightGlobal. Archived from the original on 14 June 2009.
213. Majumdar, Dave (2 December 2011). "GE, Rolls Royce Stop Funding F-35 Alt Engine". Defense News. Archived from the original on 29 July 2012.
214. "Pratt & Whitney Validates Growth Option for F135 Engine". Pratt & Whitney. 31 May 2017. Archived from the original on 22 January 2024. Retrieved 25 November 2017.
215. Kjelgaard, Chris (15 June 2017). "P&W Outlines Three-step F135 Development Pathway". Aviation International News. Archived from the original on 20 January 2024. Retrieved 11 January 2020.
216. Trimble, Steve (21 July 2020). "F-35 Propulsion Upgrade Moves Forward Despite Uncertainty". Aviation Week. Archived from the original on 10 October 2023. Retrieved 24 July 2021.
217. Tirpak, John A. (5 November 2021). "Next-Generation Power for Air Force Fighters". Air & Space Forces Magazine. Archived from the original on 15 October 2023.
218. Zazulia, Nick (11 October 2018). "Rejuvenating the Raptor: Roadmap for F-22 Modernization". Avionics Today. Archived from the original on 16 February 2019. Retrieved 15 February 2019.
219. Majumdar, Dave (6 November 2012). "US Air Force praises early performance of Lockheed Martin F-35". FlightGlobal. Archived from the original on 20 February 2020.
220. Edwards, Jack E. (16 December 2010). "Defense Management: DOD Needs to Monitor and Assess Corrective Actions Resulting from Its Corrosion Study of the F-35 Joint Strike Fighter" (PDF). Government Accountability Office. Archived from the original (PDF) on 5 August 2020. Retrieved 17 December 2010.
221. Trimble, Stephen (12 July 2010). "Farnborough: Lockheed encouraged by pace of F-35 testing". FlightGlobal. Archived from the original on 12 December 2019.
222. "Li-Ion Battery in Production for F-35s". Avionics International. 23 July 2013. Archived from the original on 25 January 2020. Retrieved 25 January 2020.
223. Hawkins, Dan (27 July 2012). "F-35 maintenance training spawns USMC's first air FTD". U.S. Air Force. Archived from the original on 10 October 2023.
224. "F-35, Maintenance and the Challenge of Service Standardization". Second Line of Defense. 9 June 2011. Archived from the original on 4 July 2011.
225. Marrow, Michael (21 September 2023). "Only 55 percent of F-35s mission capable, putting depot work in spotlight: GAO". Breaking Defense. Archived from the original on 17 December 2023.
226. Majumdar, Dave (20 November 2012). "USMC finds workaround for cyber vulnerability on F-35 logistics system". FlightGlobal. Archived from the original on 12 December 2019.
227. Tucker, Patrick (8 January 2015). "The F-35 Has To Phone Texas Before Taking Off". Defense One. Archived from the original on 18 October 2023.
228. Host, Pat (22 January 2020). "Pentagon announces replacement for F-35's ALIS". Jane's. Archived from the original on 23 January 2020.
229. Land, Michael (29 July 2021). "F-35 testers recommend fielding logistics software update". DC Military. Archived from the original on 10 October 2023.
230. Clark, Colin (13 August 2021). "ALIS Is Dying; Long Live F-35's ODIN". Breaking Defense. Archived from the original on 15 October 2023.
231. "F-35 Joint Program Office begins deployment of new logistics hardware to F-35 squadrons". Defense Visual Information Distribution Service. 9 August 2021. Archived from the original on 10 October 2023.
232. "Mighty F-35 Lightning II Engine Roars to Life". Lockheed Martin. 20 September 2006.
233. Department of Defense Authorization for Appropriations for Fiscal Year 2011 (Report).
234. Wolf, Jim (18 March 2010). "F-35 fighter makes first vertical landing". Reuters. Archived from the original on 10 October 2023.
235. Hudson, Mary L.; Glass, Michael L.; Tucker, Lt Col Tucker; Somers, C. Eric; Caldwell, Robert C. (24 June 2018). "F-35 System Development and Demonstration Flight Testing at Edwards Air Force Base and Naval Air Station Patuxent River". American Institute of Aeronautics and Astronautics (AIAA): 27. doi:10.2514/6.2018-3371. ISBN 978-1-62410-556-2. S2CID 116177609.
236. Branch, Ricardo (8 March 2012). "Northern Edge fields new radar system". Northern Edge Joint Information Bureau. Archived from the original on 27 October 2013.
237. Saiki, Tracey (28 June 2011). "Continued testing of F-35 JSF sensors a success at Northern Edge 2011". U.S. Air Force. Archived from the original on 18 October 2023. Retrieved 18 April 2012.
238. Majumdar, Dave (17 January 2012). "F-35C Tailhook Design Blamed for Landing Issues". Defense News. Archived from the original on 2 January 2013.
239. Majumdar, Dave (12 December 2013). "Lockheed: New Carrier Hook for F-35". U.S. Naval Institute. Archived from the original on 18 October 2023. Retrieved 12 December 2013.
240. Sweetman, Bill (June 2009). "Get out and fly". Defense Technology International. pp. 43–44. Archived from the original on 18 August 2009.
241. Trimble, Stephen (22 November 2010). "Fatigue cracks raise questions about key decision in F-35 redesign". FlightGlobal. Archived from the original on 3 February 2020.
242. Insinna, Valerie & Larter, David (12 June 2019). "Supersonic speeds could cause big problems for the F-35's stealth coatings". Defense News.
243. Larter, David B.; Insinna, Valerie & Mehta, Aaron (24 April 2020). "The Pentagon will have to live with limits on F-35's supersonic flights". Defense News. Retrieved 25 April 2020.
244. "FY2019 DOT&E Report – F-35 Joint Strike Fighter Aircraft (F-35)" (PDF). dote.osd.mil. 2020. Archived (PDF) from the original on 5 February 2020.
245. Capaccio, Tony (21 February 2014). "Lockheed F-35 for Marines Delayed as Test Exposes Cracks". Bloomberg. Archived from the original on 14 July 2015.
246. F-35A High Angle of Attack Operational Maneuvers. Lockheed Martin (Report). 14 January 2015.
247. Clark, Colin (19 July 2017). "Pilots Say F-35 Superior Within Visual Range: Dogfight Criticisms Laid To Rest". Breaking Defense. Archived from the original on 26 December 2022.
248. "F-35B completes first sea trials on USS Wasp". Naval Air Systems Command. 24 October 2011. Archived from the original on 10 March 2021. Retrieved 17 July 2012.
249. Shalal-Esa, Andrea (29 August 2013). "U.S. Marines see progress in F-35 testing despite challenges". Reuters. Archived from the original on 15 October 2015. Retrieved 1 July 2017.
250. "F-35B Pilots Conduct Night Shipboard Landing Without Night-Vision". Inside the Navy. Inside Washington Publishers. 9 February 2013. Retrieved 19 September 2013.^{[dead link‍]}
251. "F-35B Complete At-Sea Developmental Testing". Naval Aviation News. 14 March 2017. Archived from the original on 31 July 2020. Retrieved 5 February 2020.
252. "Navy jets trial new 'rolling' landing". BBC News. 15 October 2018. Archived from the original on 7 April 2023. Retrieved 12 August 2019.
253. "F-35C Completes First Night Flight Aboard Aircraft Carrier". U.S. Navy. 13 November 2014. Archived from the original on 10 July 2017. Retrieved 29 November 2014.
254. Cavas, Christopher (17 August 2016). "F-35C Back at Sea for 3rd Round of Carrier Tests". Defense News. Archived from the original on 22 January 2024.
255. Grady, John (11 October 2018). "Preliminary F-35C Feedback is Positive, As Formal Operational Testing Begins This Fall". U.S. Naval Institute. Archived from the original on 21 March 2023.
256. Capaccio, Anthony (23 October 2017). "F-35s Hobbled by Parts Shortages, Slow Repairs, Audit Finds". Bloomberg. Archived from the original on 23 October 2017.
257. "The Hidden Troubles of the F-35". Defense News.
258. Insinna, Valerie (24 April 2020). "The Pentagon has cut the number of serious F-35 technical flaws in half". Defense News. Archived from the original on 27 April 2020.
259. "F-35 Finally Can Use All Its Weapons In Combat". Aviation Week. 5 March 2018.
260. "Air Force issues flight release for Eglin AFB F-35A". U.S. Air Force. 28 February 2012. Archived from the original on 2 August 2013.
261. Capaccio, Tony (28 September 2012). "Air Force Expands F-35 Trials Over Tester's Objections". Bloomberg BusinessWeek. Archived from the original on 18 January 2013.
262. Clark, Colin (28 August 2012). "Pentagon's Testing Czar Questions F-35 Program's OTE Plan". Breaking Defense. Archived from the original on 31 August 2012.
263. Shalal-Esa, Andrea (10 September 2012). "More problems raised at Pentagon F-35 fighter review". Reuters. Archived from the original on 10 October 2023.
264. Majumdar, Dave (16 November 2012). "USAF unit completes F-35 OUE activity". FlightGlobal. Archived from the original on 25 May 2014.
265. Shalal-Esa, Andrea (27 February 2012). "USMC Near Start of F-35 Training Flights". Reuters. Archived from the original on 10 October 2023.
266. Majumdar, Dave (21 November 2012). "Simulation plays vital role in building F-35 tactics and aircraft development". FlightGlobal. Archived from the original on 15 September 2020.
267. Everstine, Brian (17 December 2012). "F-35 pilot training starts next month at Eglin". Military Times. Archived from the original on 10 March 2013.
268. "65th Aggressor Squadron reactivates at Nellis with aggressor force of F-35s". U.S. Air Force. 9 June 2022. Archived from the original on 10 October 2023.
269. Burgess, Richard R. (28 May 2019). "Navy Deactivates First F-35C Replacement Squadron, Merges With Second". Sea Power Magazine. Archived from the original on 10 October 2023.
270. Hunter, Jamie (10 July 2020). "How The F-35 Triggered Topgun's Biggest Syllabus Revamp In Nearly Four Decades". The Drive. Archived from the original on 10 October 2023.
271. Reidinger, Staci (21 November 2012). "First Operational F-35 Squadron honored in historic ceremony". Defense Visual Information Distribution Service. Archived from the original on 23 May 2023. Retrieved 22 January 2024.
272. Davenport, Christian (15 September 2015). "Pentagon weapons tester calls F-35 evaluation into question". The Washington Post. Archived from the original on 30 September 2015.
273. Bardo, J. T. (1 August 2016). "Executive Summary of VMFA-121 Support of Red Flag 16-3". DocumentCloud. United States Marine Corps. Archived from the original on 26 March 2019.
274. Ali, Idrees; Stone, Mike (27 September 2018). "F-35 jet used by U.S. in combat for first time". Reuters. Archived from the original on 27 September 2018. Retrieved 27 September 2018.
275. "Marines Propose Rapidly Mobile F-35 Operations". Aviation Week. 16 December 2014.
276. Eckstein, Megan (23 April 2019). "Marines Folding F-35B into New Pacific Island-Hopping Concept". U.S. Naval Institute. Archived from the original on 26 December 2023.
277. Jennings, Gareth (6 January 2022). "USMC deploys F-35C for first time". Janes. Archived from the original on 18 January 2024.
278. Seck, Hope Hodge (26 September 2024). "'Cool Birds': Afghan general describes awe of first F-35 encounter". Military Times. Retrieved 29 September 2024.
279. Trevithick, Joseph (12 November 2024). "F-35C Naval Joint Strike Fighters Fly Combat Missions Against Houthis In Yemen". The War zone. Retrieved 13 November 2024.
280. Lockie, Alex (8 February 2017). "The F-35 slaughtered the competition in its latest test". Business Insider. Archived from the original on 26 July 2021.
281. "U.S. Air Force's F-35A Lightning II arrives for first Middle East deployment". U.S. Air Forces Central. 15 April 2019. Archived from the original on 3 June 2023.
282. "U.S. Air Force F-35As conduct first combat employment". U.S. Air Force. 30 April 2019. Archived from the original on 10 January 2024.
283. Hoyle, Craig (19 December 2021). "First European-based US Air Force F-35As arrive at Lakenheath home". FlightGlobal. Archived from the original on 19 December 2021.
284. Cenciotti, David (9 January 2015). "RAF Lakenheath was selected as the first base to host USAFE F-35s". The Aviationist. Archived from the original on 25 September 2023. Retrieved 13 January 2015.
285. Cohen, Rachel S. (2 May 2019). "JPO Seeks to Slash F-35A Flight-Hour Costs". Air & Space Forces Magazine. Archived from the original on 29 May 2023.
286. Thompson, Mark (2 April 2013). "Costly Flight Hours". Time. ISSN 0040-781X. Archived from the original on 17 January 2024. Retrieved 25 April 2020.
287. Reim, Garrett (30 January 2020). "Lockheed Martin sees F-35 production rising to 180 units per year, despite high flying costs". FlightGlobal. Archived from the original on 31 January 2020.
288. "Thousands of sailors deploy with USS Carl Vinson strike group". FOX 5 San Diego. 2 August 2021. Archived from the original on 6 January 2024.
289. "F-35B Lightning". Royal Air Force. Retrieved 30 August 2019.
290. "Major Projects Report 2008". Ministry of Defence. Archived from the original on 7 August 2012. Retrieved 23 November 2009.
291. "US Marines eye UK JSF shipborne technique". FlightGlobal. 15 June 2007. Archived from the original on 30 July 2012.
292. "Military Aircraft: Written question – 60456". UK Parliament. 17 January 2017. Archived from the original on 18 October 2023. Retrieved 4 July 2017.
293. "Royal Air Force's No. 617 Squadron to fly F-35B fighter". Airforce Technology. 19 July 2013. Archived from the original on 7 April 2023.
294. "Dambusters to be first Lightning II squadron". Ministry of Defence. 18 July 2013. Archived from the original on 18 January 2024.
295. "17 Squadron Standard Parade". Royal Air Force. 12 April 2013. Archived from the original on 28 August 2013. Retrieved 25 January 2020.
296. "Third Joint Strike Fighter for the UK arrives". Royal Air Force. 28 June 2013. Archived from the original on 1 July 2013.
297. "Navy's new F-35 jump jet flies from trademark ski ramp for first time". Royal Navy. 25 June 2015. Archived from the original on 7 July 2015. Retrieved 6 July 2015.
298. "Identity of F-35 Lightning Training Squadron Announced". Royal Air Force. 5 July 2017. Archived from the original on 28 July 2017.
299. "Second Lightning Fight Jet Squadron Arrives In UK". Royal Air Force. 17 July 2019. Archived from the original on 5 April 2023. Retrieved 25 January 2020.
300. "RAF's legendary Dambusters squadron reforms to fly F-35 jets". Ministry of Defence. 18 April 2018. Archived from the original on 6 April 2023.
301. "Britain's most advanced jets touch down on home soil". Ministry of Defence. 6 June 2018. Archived from the original on 13 July 2023.
302. Nicholls, Dominic (10 January 2019). "New RAF jet 'combat ready' in face of resurgent Russia threat". The Daily Telegraph. London. Archived from the original on 10 January 2022.
303. "UK's most advanced jets deploy overseas for the first time". Ministry of Defence. 8 April 2019. Archived from the original on 10 January 2024.
304. "F-35 fighter jets join fight against IS". BBC News. 25 June 2019. Archived from the original on 5 April 2023.
305. "First UK fighter jets land onboard HMS Queen Elizabeth". Ministry of Defence. 13 October 2019. Archived from the original on 18 January 2024.
306. "F-35 Lightnings depart for Exercise RED FLAG in USA". Royal Air Force. 22 January 2020. Archived from the original on 10 October 2023. Retrieved 25 January 2020.
307. Allison, George (21 November 2022). "Britain takes delivery of more F-35 jets". UK Defence Journal. Archived from the original on 10 April 2023.
308. "809 Squadron Stood Up". December 2023.
309. "Immortal air squadron to fly Royal Navy's newest jets". Royal Navy. 9 September 2013. Archived from the original on 1 October 2020. Retrieved 21 March 2015 – via National Archives.
310. Hunter, Jamie (15 March 2021). "Top British F-35 Pilot On How His Fledgling Team Is Forging Its Own Path Forward". The Drive. Archived from the original on 10 October 2023.
311. "RAAF F-35s achieve 1,000 flying hour milestone". Australian Aviation. 12 June 2020. Archived from the original on 10 October 2023. Retrieved 21 April 2021.
312. Wroe, David (3 March 2017). "Joint Strike Fighters: Australian military stealth unveiled at Avalon Airshow". The Sydney Morning Herald. Archived from the original on 10 October 2023. Retrieved 21 April 2021.
313. "PM's landing at Williamtown". Port Stephens Examiner. 10 February 2021. Archived from the original on 10 October 2023. Retrieved 21 April 2021.
314. "Final F-35A aircraft delivered". Department of Defence (Press release). 19 December 2024. Retrieved 20 December 2024.
315. "Israel Declares F-35I Adir Combat Capable". F-35 Lightning II. Archived from the original on 26 September 2020. Retrieved 9 December 2017.
316. Novak, Jake (18 July 2019). "The F-35 has already freaked out Iran and changed everything in the Middle East". CNBC. Archived from the original on 26 December 2022.
317. Okbi, Yasser; Hashavua, Maariv (29 March 2018). "Report: Israeli stealth fighters fly over Iran". The Jerusalem Post. Archived from the original on 29 March 2018.
318. Williams, Dan (22 May 2018). "Israel says it is the first country to use U.S.-made F-35 in combat". Reuters. Archived from the original on 6 November 2023.
319. Kubovich, Yaniv (23 May 2018). "A Message of Superiority: This Is the Israeli Army's Photo of an F-35 Over Beirut". Haaretz. Archived from the original on 7 December 2022.
320. Bachner, Michael (30 July 2019). "Israel said to hit Iranian sites in Iraq, expanding strikes on missile shipments". The Times of Israel. Archived from the original on 9 May 2023.
321. Trevithick, Joseph (25 May 2017). "Israel Is Getting A Single F-35 Test Jet Unlike Any Other". The Drive. Archived from the original on 6 November 2023. Retrieved 7 January 2021.
322. Jennings, Gareth (12 November 2020). "Israel receives F-35I testbed to develop national capabilities". Jane's. Archived from the original on 19 October 2023. Retrieved 7 January 2021.
323. "מבצע "שומר החומות" – סיכום 11.05". idf.il (in Hebrew). 11 May 2021. Archived from the original on 1 October 2021. Retrieved 7 November 2021.
324. Zitun, Yoav (6 March 2022). "Israel shot down Iranian drones en route to Gaza, IDF says". Ynetnews. Archived from the original on 7 November 2023.
325. D'Urso, Stefano (12 October 2023). "Configuration And Payload Of The Aircraft Employed By Israel In The Fight Against Hamas". The Aviationist. Archived from the original on 14 January 2024.
326. Carlin, Maya (12 October 2023). "Meet the F-35I Adir: Israel Has a 'Stealth' Fighter Not Even America Has". 19FortyFive. Archived from the original on 18 November 2023.
327. Osborn, Kris (18 October 2023). "Is Israel Using It's Special "Adir" F-35i Variant to Attack Hamas?". Warrior Maven: Center for Military Modernization. Archived from the original on 20 November 2023.
328. Frantzman, Seth J. (2 November 2023). "Israel uses F-35I to shoot down cruise missile, a first for Joint Strike Fighter". Breaking Defense. Archived from the original on 17 December 2023.
329. "Israel strikes Yemeni port with advanced F-35I Adir jets". MSN. Retrieved 26 October 2024.
330. "Behind the scenes of Israeli attack: Over 100 aircraft and a 2,000 km journey to Iran". The Jerusalem Post. 26 October 2024. Retrieved 26 October 2024.
331. Kington, Tom (30 November 2018). "Italy F-35s reach initial operating capability". Defense News. Archived from the original on 22 January 2024. Retrieved 13 January 2022.
332. Yeo, Mike (1 April 2019). "Asia allies take major steps forward with F-35 rollout". Defense News. Archived from the original on 22 January 2024. Retrieved 7 August 2022.
333. Gady, Franz-Stefan (1 April 2019). "Japan Air Self Defense Force Stands Up First F-35A Lightning II Fighter Squadron". The Diplomat. Archived from the original on 5 April 2023.
334. Host, Pat (7 November 2019). "Norway declares F-35A initial operational capability". Jane's. Archived from the original on 10 October 2023. Retrieved 13 January 2022.
335. Sprenger, Sebastian (6 January 2022). "Norway swaps in its F-35s for NATO quick-reaction mission in the High North". Defense News. Archived from the original on 22 January 2024. Retrieved 13 January 2022.
336. Fouche, Gwladys (23 September 2023). "Lockheed Martin F-35A fighter jets land on motorway". Reuters. Archived from the original on 24 October 2023. Retrieved 24 September 2023.
337. Jennings, Gareth (29 December 2021). "Netherlands declares IOC for F-35". Jane's. Archived from the original on 10 October 2023. Retrieved 13 January 2022.
338. Defense White Paper 2022 (PDF). Dutch Ministry of Defense. 19 July 2022. p. 28.
339. Waldron, Greg (2 August 2012). "In Focus: Tokyo casts wary eye on Chinese airpower developments". FlightGlobal. Archived from the original on 20 February 2020.
340. Ewing, Philip (19 June 2012). "Lockheed's comprehensive Q&A on the F-35". DoD Buzz. Archived from the original on 18 August 2012.
341. "F-35 Lightning Drag Chute". Code One Magazine. 13 August 2014. Archived from the original on 27 March 2023. Retrieved 20 January 2020.
342. Hancock, Ben D. (1997). "The STOVL Joint Strike Fighter in Support of the 21st Century Marine Corps". Defense Technical Information Center.
343. Bly, Peter (14 June 2011). "Constructability of a High Temperature Concrete Pad" (PDF). Geotechnical & Structures Laboratory, US Army Engineer Research & Development Center (ERDC). Archived from the original (PDF) on 25 April 2012. Retrieved 15 April 2014.
344. Norris, Guy (24 April 2014). "Pilot reaction to flying the F-35B". Aviation Week & Space Technology. Archived from the original on 27 July 2014. Retrieved 15 September 2014.
345. Dsouza, Larkins (16 March 2010). "F-35B STOVL-mode Flight". Defence Aviation. Archived from the original on 15 August 2020. Retrieved 25 November 2010.
346. "FY2019 President's Budget Selected Acquisition Report (SAR) – F-35 Joint Strike Fighter Aircraft (F-35)" (PDF). esd.whs.mil. Archived from the original (PDF) on 10 March 2019.
347. Kalman, Aaron (18 April 2013). "Jet's name is just plane 'Awesome'". The Times of Israel. Archived from the original on 26 December 2022.
348. "Israel's first F-35 Lightning II takes flight". Lockheed Martin. 26 July 2016. Archived from the original on 28 July 2017. Retrieved 4 August 2016.
349. Ben-David, Alon (27 August 2010). "Israel To Buy F-35s With Cockpit Mods". Aviation Week.^{[dead link‍]}
350. Ben-David, Alon; Butler, Amy & Wall, Robert (7 July 2011). "Israel, U.S. Strike F-35 Technology Deal". Aviation Week.^{[dead link‍]}
351. David, Eshel; Fulghum, David (6 August 2012). "Israel, U.S. Agree To $450 Million In F-35 EW Work". Aviation Week. Archived from the original on 10 May 2013.
352. Trimble, Stephen (22 January 2010). "Israel sets sights on two-seater F-35". FlightGlobal. Archived from the original on 11 August 2020.
353. Egozi, Arie (11 January 2008). "Israel to boost range of future F-35 fleet". FlightGlobal. Archived from the original on 9 April 2020.
354. Frankel, Julia (2 July 2023). "Israel to buy more F-35 fighter jets from US. Deal expands fleet by 50% and deepens partnership". AP News. Archived from the original on 19 December 2023.
355. Bob, Yonah Jeremy (30 April 2023). "As F-35 deals move forward in US, where does Israel stand? - analysis". The Jerusalem Post. Archived from the original on 21 January 2024.
356. Daly, Brian (1 September 2010). "Harper, Ignatieff spar over fighter jets". Calgary Sun. Archived from the original on 2 March 2014. Retrieved 2 March 2014.
357. Berthiaume, Lee (20 December 2012). "Military will contract out air-to-air refuelling if Canada goes with F-35". Canada.com. Archived from the original on 2 March 2014. Retrieved 2 March 2014.
358. Yalkin, Tolga R.; Weltman, Peter (10 March 2011). "An Estimate of the Fiscal Impact of Canada's Proposed Acquisition of the F-35 Lightning II Joint Strike Fighter". Office of the Parliamentary Budget Office. Archived (PDF) from the original on 2 March 2014.
359. "A New Plan For a Strong Middle Class" (PDF). Liberal Party of Canada. 5 October 2015. Archived from the original (PDF) on 14 October 2015. Retrieved 5 October 2015.
360. Drew, James (21 October 2015). "Canadian F-35 exit could signal wider air force review". FlightGlobal. Archived from the original on 8 November 2020. Retrieved 9 January 2023.
361. "Future Fighter Capability Project - Defence Capabilities Blueprint". Canadian Department of National Defence. 30 May 2018. Archived from the original on 22 January 2024.
362. Brewster, Murray (28 March 2022). "Liberals launch negotiations to buy F-35 fighter jets". CBC News. Archived from the original on 18 November 2022. Retrieved 9 January 2023.
363. "Future fighter capability project". National Defence (canada.ca). 9 January 2023. Retrieved 9 January 2023.
364. Dubois, Gastón (21 June 2022). "Nine fully operational Canadian F-35 stealth fighters by 2027?". Aviacionline.com. Archived from the original on 5 January 2023.
365. "Swedish jet maker complains Ottawa not following rules with F-35 negotiations". CTV News. 30 September 2022. Archived from the original on 8 March 2023.
366. Anita Anand, Minister of Defence (9 January 2023). "Announcement regarding the F-35 acquisition". National Defence (canada.ca). Retrieved 9 January 2023.
367. Berthiaume, Lee (9 January 2023). "Canada ends years-long search for new fighter jet with deal to buy F-35s". CTV News. Archived from the original on 10 October 2023. Retrieved 9 January 2023.
368. Parken, Oliver (9 January 2023). "Canada Closes Deal for 88 F35s to Finally Replace Its Aging CF18s". The Drive. Archived from the original on 24 March 2023. Retrieved 20 January 2021.
369. Jennings, Gareth (20 December 2021). "Lockheed Martin to design and develop F-35 variant 'tailored' for foreign customer". Janes. Archived from the original on 10 October 2023.
370. "Belgium receives first F-35". Janes.com. 11 December 2023. Retrieved 22 April 2024.
371. "F-35 delivery delays: a problem for European air forces - War Wings Daily". 25 March 2024. Retrieved 22 April 2024.
372. Emmott, Robin (25 October 2018). "Belgium picks Lockheed's F-35 over Eurofighter on price". Reuters. Brussels. Archived from the original on 25 October 2018.
373. "Luchtmachtbasissen moeten verbouwd worden voor F-35: 275 miljoen euro". Het Nieuwsblad (in Dutch). 8 July 2019. Archived from the original on 8 July 2019.
374. "Danish F-35 aircraft achieve new milestone in the USA". Air Recognition. Archived from the original on 8 December 2023. Retrieved 17 November 2021.
375. "Agreement on Procurement for New Fighters" (PDF). Danish Ministry of Defence (in Danish). Archived from the original (PDF) on 6 October 2019. Retrieved 9 June 2016.
376. "Det første F-35, der skal til Danmark, er nu leveret i USA" (in Danish). Forsvaret. 1 May 2023. Archived from the original on 1 October 2023. Retrieved 4 May 2023.
377. "Denmark's First F-35s Arrive at Skrydstrup Air Base". www.f35.com. 14 September 2023. Retrieved 15 September 2023.
378. "Israel receives new F-35 fighter jets from Lockheed Martin, bolstering arsenal". I24news. 23 July 2023. Archived from the original on 18 January 2024.
379. Mathew, Arun. "Unique F-35I Test Aircraft Arrives in Israel". DefPost. Archived from the original on 13 January 2021. Retrieved 7 January 2021.
380. Ahronheim, Anna (26 November 2018). "Air Force Bolsters Stealth Power as More F-35I Fighter Jets Land in Israel". The Jerusalem Post. Archived from the original on 26 December 2022.
381. Israel, David (2 July 2023). "Israel to Purchase 3rd F-35 Squadron, Will Up Number of Stealth Fighters to 75". Jewishpress. Archived from the original on 2 July 2023.
382. Kington, Tom (28 May 2020). "Italy defense minister commits to F-35 after calls to suspend program". Defense News. Archived from the original on 22 January 2024. Retrieved 13 January 2021.
383. Kington, Tom (21 October 2020). "Italy's Navy-Air Force tussle over the F-35 comes to a head". Defense News. Archived from the original on 21 October 2020. Retrieved 14 January 2021.
384. "F-35 Lightning II: Creating Jobs. Securing Italy's Future" (PDF). F35.com. Lockheed Martin. February 2017. Archived from the original (PDF) on 7 July 2017. Retrieved 14 January 2021. Aeronautica Militare is programmed to receive 60 F-35A CTOLs and 15 F-35B STOVLs, while Marina Militare is programmed to acquire 15 F-35B STOVLs.
385. Cenciotti, David (29 March 2023). "Future Base, Expected FOC And More About The Italian F-35 Fleet". The Aviationist. Archived from the original on 10 October 2023. Retrieved 7 April 2023.
386. "Italy announced its intentions to acquire Typhoons and 25 F-35s". 17 September 2024. Retrieved 18 September 2024.
387. Giansiracusa, Aurelio. "Ulteriori venticinque F-35 per Aeronautica e Marina Militare". Ares Difesa. Retrieved 22 December 2024.
388. Gady, Franz-Stefan (1 April 2019). "Japan Air Self Defense Force Stands Up First F-35A Lightning II Fighter Squadron". The Diplomat.
389. Kelly, Tim; Kubo, Nobuhiro (21 February 2018). "Exclusive: Japan to buy at least 20 more F-35A stealth fighters". Reuters. Archived from the original on 22 January 2024. Retrieved 21 February 2018.
390. Harding, Robin (18 December 2018). "Japan to expand military with 100 more F-35 stealth fighters". Financial Times. Archived from the original on 10 December 2022. Retrieved 10 January 2019.
391. "Defence of Japan 2022 (Annual White Paper)" (PDF). Ministry of Defence (Japan) (in Japanese). p. 53. Archived from the original (PDF) on 6 December 2022.
392. "World Air Forces 2014" (PDF). Flight Global Insight. 2014. Archived from the original (PDF) on 1 February 2014.
393. "Netherlands Orders Eight F-35s". Aviation Week. 26 March 2015. Retrieved 25 May 2015.
394. "Defence spending to be stepped up, more tanks and F-35 jets". DutchNews.nl. 14 December 2018. Archived from the original on 22 January 2024. Retrieved 15 December 2018.
395. Silvestris, Elia (27 September 2024). "End of an Era: Bidding Farewell to the F-16 in the RNLAF After 45 Years of Service". The Aviationist. Retrieved 28 September 2024.
396. "Norge har mottatt 37 F-35". Forsvaret (in Norwegian Bokmål). Retrieved 11 August 2024.
397. "Norway receives another three F-35As". key.aero. 13 August 2021. Archived from the original on 10 October 2023. Retrieved 17 November 2021.
398. "Northrop Grumman completes center fuselage for first Norwegian F-35 aircraft". F-35 Lightning II. Archived from the original on 24 June 2017. Retrieved 31 March 2015.
399. Insinna, Valerie (11 October 2019). "Norway's F-35s have a problem with a unique piece of gear". Defense News. Archived from the original on 13 October 2019.
400. Sang-ho, Song (27 January 2022). "S. Korea's Air Force completes deployment of 40 F-35A fighters: sources". Yonhap News Agency. Archived from the original on 10 October 2023. Retrieved 4 February 2022.
401. Vavasseur, Xavier (4 September 2020). "South Korea to Double Down on F-35 and Procure STOVL Variant for LPX-II". Naval News. Archived from the original on 10 October 2023. Retrieved 9 April 2021.
402. Waldron, Greg (13 April 2020). "USA approves $675 million support package for Korean F-35s". FlightGlobal. Archived from the original on 13 August 2020. Retrieved 13 January 2021.
403. Smith, Josh (20 December 2017). "South Korea plans to buy 20 additional F-35 aircraft: report". Reuters. Archived from the original on 18 October 2023.
404. Yeo, Mike (14 September 2023). "US State Department approves South Korea to buy 25 more F-35A jets". Defense News. Archived from the original on 22 January 2024. Retrieved 7 November 2023.
405. Farley, Robert (2 January 2018). "Who Wants to Operate Carrier-Based F-35Bs in Asia? Apparently, Japan and South Korea". The Diplomat. Archived from the original on 3 October 2023.
406. "S. Korea begins procedures to introduce F-35B fighters for light aircraft carrier". Yonhap News Agency. 5 August 2020. Archived from the original on 28 September 2023.
407. "'경항모' 기사회생했지만 탑재 전투기는 F-35B 뿐… 가성비 논란 '여전'" [The 'light aircraft carrier' was revived, but the only aircraft on board was the F-35B... The cost-effectiveness controversy 'still persists']. 한국일보 (in Korean). 6 December 2021. Archived from the original on 22 January 2024.
408. Allison, George (17 March 2024). "Britain takes delivery of more new F-35 stealth jets". UK Defence Journal. Retrieved 18 June 2024.
409. "UK receives final TR-2 standard F-35s". Janes. 26 March 2024. Retrieved 18 June 2024.
410. Allison, George (23 May 2024). "Britain takes delivery of more new F-35 jets". UK Defence Journal. Retrieved 18 June 2024.
411. "Probe after British F-35 fighter crashes in Mediterranean". BBC News. 17 November 2021. Archived from the original on 11 May 2022.
412. Allison, George (4 November 2021). "More F-35 jets delivered to the UK". UK Defence Journal. Archived from the original on 10 October 2023.
413. "Further five F-35 fighter jets land at new RAF Marham home". ITV News. 4 August 2018. Archived from the original on 6 April 2023.
414. "Lockheed Martin-Built F-35 Comes Home to RAF Marham". F35.com. Lockheed Martin. Archived from the original on 14 September 2020. Retrieved 19 June 2018.
415. "UK receives final F-35 test aircraft". Janes Defence Weekly. Vol. 53, no. 16. 20 April 2016.
416. Urban, Mark (24 November 2015). "Defence Review: Fighting old battles?". BBC News. Archived from the original on 20 January 2024. Retrieved 24 November 2015.
417. Allison, George (23 March 2021). "UK looking at '60 and then maybe up to 80′ F-35B jets". UK Defence Journal. Archived from the original on 26 March 2023.
418. Glaze, Ben (8 September 2022). "UK will buy a maximum of 74 Lightning stealth warplanes - 64 fewer than planned". Daily Mirror. Archived from the original on 22 January 2024.
419. Allison, George (6 February 2024). "UK appears to recommit to full order of 138 F-35Bs". Retrieved 6 February 2024.
420. Department of Defense Fiscal Year (FY) 2025 Budget Estimates: Air Force – Aircraft Procurement, Air Force Justification Book (PDF) (Report). Vol. 1. March 2024. p. 6. Retrieved 9 August 2024.
421. "2024 World Air Forces directory". Flightglobal Insight. 2024. Retrieved 21 January 2024.
422. Reim, Garrett (18 April 2018). "DOD reveals F-35 multiyear procurement strategy to start in 2021". FlightGlobal. Archived from the original on 8 March 2021.
423. Defence, National (9 January 2023). "Announcement regarding the F-35 acquisition". www.canada.ca. Retrieved 4 April 2024.
424. Berthiaume, Lee (20 December 2022). "Defence Department gets OK to spend $7 billion on 16 F-35 fighter jets: CP sources". CTV News. Archived from the original on 21 December 2022. Retrieved 21 December 2022.
425. Brewster, Murray (9 January 2023). "Federal government inks deal to buy fleet of F-35 fighter jets". CBC News. Archived from the original on 9 January 2023. Retrieved 9 January 2023.
426. Lehrfeld, Jonathan (30 June 2023). "US State Dept. clears $5.6 billion sale of F-35s for Czech Republic". Defense News.
427. Ferran, Lee (29 January 2024). "Czech Republic joins F-35 ranks, inks 'most important' deal with US for 24 aircraft". Breaking Defense. Retrieved 29 January 2024.^{[permanent dead link‍]}
428. McNeil, Harry (27 September 2024). "Lockheed Martin secures deal to integrate F-35s to Czech Republic". Airforce Technology. Retrieved 21 November 2024.
429. "Finland signs F-35 fighter jet deal". News. 11 February 2022.
430. "The Lockheed Martin F-35A Lightning II is Finland's next multi-role fighter". Ministry of Defence (Finland). 10 December 2021. Archived from the original on 3 January 2024.
431. Ristamäki, Juha; Nurmi, Lauri (5 December 2021). "IL:n tiedot: Puolustusvoimat esittää yhdysvaltalaista F-35:ttä Suomen uudeksi hävittäjäksi" [Information from IL: The Defense Forces presents the US F-35 as Finland's new fighter]. Iltalehti (in Finnish). Archived from the original on 10 October 2023.
432. Sabak, Juliusz (29 July 2022). "Niemcy: Wielki zakup F-35 z uzbrojeniem za 8,4 mld dolarów" [Germany: Major purchase of F-35 with weapons for $8.4 billion]. defence24.pl (in Polish). Archived from the original on 10 October 2023.
433. "Germany Becomes Latest Country to Join the F-35 Lightning II Global Team". Lockheed Martin. 14 December 2022. Archived from the original on 10 October 2023. Retrieved 15 December 2022.
434. "Germany Is in Talks to Buy 10 Additional F-35 Fighter Jets". Bloomberg, 7 June 2024.
435. Lee, Matthew (27 January 2024). "US approves sale of F-16 jets to Turkey, F-35s to Greece". Defense News. Retrieved 2 February 2024.
436. "Greece signs deal to buy 20 US-made F-35 jets in major military overhaul". AP News. 25 July 2024. Retrieved 16 August 2024.
437. "Greece Becomes Newest Member Of The F-35 Lightning II Global Alliance". news.lockheedmartin.com. 25 July 2024.
438. Adamowski, Jaroslaw (31 January 2020). "Poland inks $4.6 billion contract for F-35 fighter jets". Defense News. Archived from the original on 31 January 2020.
439. Kaleta, Włodzimierz (8 December 2023). "Amerykanie oblatują F-35 dla Polski" [Americans are test-flying the F-35 for Poland]. wnp.pl (in Polish). Archived from the original on 14 January 2024. Retrieved 14 January 2024.
440. Graf, Jędrzej (27 July 2022). "Poland to Buy 1,000 MBTs. Minister Błaszczak Also Outlines a Plan To Procure Extra F-35s or F-15s". Defence24. Archived from the original on 27 September 2023. Retrieved 10 August 2022.
441. "Romania Becomes the 20th Member of the F-35 Global Alliance". lockheedmartin.com. 21 November 2024.
442. Victor Cozmei (21 November 2024). "OFICIAL România a semnat contractul cu SUA pentru 32 de avioane de vânătoare F-35". HotNews (in Romanian).
443. Stan, Valentin (28 August 2024). "Armata Română a publicat proiectul de lege pentru achiziția de avioane F-35. Când vor fi scoase F-16 din dotarea Forțelor Aeriene". Digi24 (in Romanian).
444. "Singapore to buy 8 F-35A fighter jets, adding to 12 F-35Bs it ordered earlier: Ng Eng Hen". Today Online yea= 2024. Retrieved 28 February 2024.
445. Tham, Davina (24 February 2023). "Singapore to acquire 8 more F-35B fighter jets, growing fleet to 12". Channel News Asia. Archived from the original on 4 January 2024. Retrieved 25 February 2023.
446. "Air2030: Beschaffungsvertrag für die Kampfflugzeuge F-35A unterzeichnet" (in German). Federal Department of Defence, Civil Protection and Sport. 19 September 2022. Archived from the original on 27 February 2023. Retrieved 19 September 2022.
447. "Schweiz unterzeichnet Kaufvertrag für F-35" (in German). Tagesanzeiger. 19 September 2022. Archived from the original on 6 March 2023. Retrieved 19 September 2022.
448. Carlin, Maya (28 October 2023). "Why Won't America Sell F-35 Stealth Fighters to Taiwan?". The National Interest. Retrieved 15 June 2024.
449. "Taiwan plans to request F-35s from US". Taipei Times. 20 September 2011. Archived from the original on 8 December 2023. Retrieved 16 January 2012.
450. Shim, Elizabeth (28 April 2017). "Taiwan's plan to buy F-35 fighter jets riles China". United Press International. Archived from the original on 17 October 2017. Retrieved 17 October 2017.
451. Yeo, Mike (16 March 2018). "Taiwan renews interest in F-35 to counter Chinese first strike". Defense News. Melbourne. Archived from the original on 18 March 2018. Retrieved 18 March 2018.
452. Zhezheng, Hong (28 November 2018). "放棄F-35 我擬對美採購66架F-16V新戰機" (in Chinese). Archived from the original on 29 November 2018. Retrieved 29 November 2018.
453. Nanuam, Wassana (12 January 2022). "Air force eyes B13.8bn jets purchase". Bangkok Post. Archived from the original on 22 January 2024.
454. Nanuam, Wassana (31 December 2021). "Air force eyes F-35 stealth jets". Bangkok Post. Archived from the original on 22 January 2024.
455. "ผบ.ทอ. ประกาศซื้อ F-35 อีกครั้ง พร้อม MUM-T เผยเสนอในปีงบ 66 นี้เลย" [Air Force Commander announces purchase of F-35 again, with MUM-T revealed to be offered in fiscal year 2023.]. thaiarmedforce (in Thai). 31 December 2021. Archived from the original on 10 October 2023.
456. Nanuam, Wassana (22 May 2023). "US Pentagon set to rebuff Thailand's bid for F-35s". Bangkok Post. Archived from the original on 22 May 2023. Retrieved 23 May 2023.
457. Kelly, Fergus (21 June 2018). "Turkey receives F-35s from Lockheed, despite US Senate ban". The Defense Post. Archived from the original on 10 October 2023.
458. "Turkey to Order Four More F-35 Fighter Jets". F-35.com. Archived from the original on 21 November 2019. Retrieved 24 November 2016.
459. "Turkey Plans More F-35 Orders After Receiving First Batch in 2018". Haaretz. Reuters. 28 October 2016. Archived from the original on 26 December 2022.
460. Pawlyk, Oriana (16 June 2019). "Trump: Turkey Will Be Out of F-35 Fighter Jet Program After S-400 Buy". Military.com. Archived from the original on 16 March 2023.
461. Finnerty, Ryan (23 January 2023). "US, Turkish defence officials meet for second round of F-35 discussions". FlightGlobal. Archived from the original on 23 January 2023.
462. Jennings, Gareth (24 January 2023). "US, Turkey continue talks to settle F-35 dispute". Janes. Archived from the original on 3 August 2023.
463. "US to buy eight F-35 jets originally built for Turkey". TRT World. Reuters. 21 July 2020. Archived from the original on 9 December 2023.
464. Insinna, Valerie (21 July 2020). "It's official: US Air Force to buy Turkish F-35s". Defense News. Archived from the original on 21 July 2020.
465. "F-35'lerin ilk teslimat töreni ABD'de gerçekleşti" [The first delivery ceremony of F-35s took place in the USA]. trthaber.com (in Turkish). TRT Haber. 21 June 2018. Archived from the original on 10 October 2023.
466. Stone, Mike; Ali, Idrees (4 April 2019). "Turkish F-35 delivered to training base in Arizona, official says". Reuters. Archived from the original on 5 April 2023. Retrieved 17 July 2019.
467. "Turkish F35 takes flight". YouTube (Video). Kaparzo1453. 23 May 2018. Archived from the original on 4 March 2023. Retrieved 7 March 2023.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
468. "Turkish Air Force pilots training with Turkish F-35As at Luke Air Force Base". YouTube (Video). Tonk298. 26 February 2019. Archived from the original on 4 March 2023. Retrieved 7 March 2023.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
469. Tirpak, John A. (20 July 2020). "USAF Nets Turkey's F-35s Under $861.7M Contract Mod". Air & Space Forces Magazine. Archived from the original on 15 October 2023.
470. "US ready to greenlight Turkey's F-35 fighter jet program if Ankara gives up Russian S-300s and S-400s". February 2024. Archived from the original on 2 February 2024. Retrieved 3 July 2024.
471. "White House moves forward with sale of F-35s to UAE". Al Jazeera. 4 November 2020. Archived from the original on 10 October 2023.
472. "Biden suspends F-35 sale to UAE". Daily Sabah. 27 January 2021. Archived from the original on 10 October 2023.
473. Axelrod, Tal (13 April 2021). "Biden to move ahead with $23 billion UAE weapons sale approved by Trump". The Hill. Archived from the original on 14 April 2021. Retrieved 14 April 2021.
474. Ghantous, Ghaida; Ponnezhath, Maria; Stone, Mike; Ali, Idrees (14 December 2021). "UAE told the U.S. it will suspend talks on F-35 jets -Emirati official". Reuters. Archived from the original on 22 January 2024.
475. Palowski, Jakub (15 December 2021). "Emiraty bez F-35? Porozumienie zerwane" [Emirates without F-35? Agreement broken]. defence24.pl (in Polish). Archived from the original on 10 October 2023.
476. "UAE rules out reopening F-35 talks with US". Middle East Eye. Retrieved 18 September 2024.
477. Marrow, Michael (5 June 2024). "What a crashed jet means for an F-35 program already thin on test planes". Breaking Defense. Retrieved 15 June 2024.^{[permanent dead link‍]}
478. "An F-35 Went Down in New Mexico. It's Still One of the Safest Planes in the Skies". Popular Mechanics. 4 June 2024. Retrieved 15 June 2024.
479. Lockheed Martin. "F-35A Conventional Takeoff and Landing Variant". Archived from the original on 17 March 2011. Retrieved 13 July 2012.
480. "F-35A Lightning II". af.mil. Retrieved 25 November 2017.
481. "F-35B Short Takeoff/Vertical Landing Variant". Lockheed Martin. Archived from the original on 17 March 2011. Retrieved 13 July 2012.
482. "F-35C Carrier Variant". Lockheed Martin. Archived from the original on 17 March 2011. Retrieved 13 July 2012.
483. "F-35 Weaponry". F35.com. Lockheed Martin. Archived from the original on 18 April 2019. Retrieved 28 February 2019.
484. "FY2016 DOT&E Report – F-35 Joint Strike Fighter Aircraft (F-35)" (PDF). dote.osd.mil. 2017. p. 15. Archived from the original (PDF) on 13 July 2017.
485. "F-35A Lightning II". Royal Australian Air Force. Retrieved 14 November 2022.
486. North, Gary (April 2016). "Long Combat Radius" (PDF). F-35: The Future is Now. Fisher.org.il. Archived from the original (PDF) on 9 June 2016. Retrieved 9 June 2016.
487. "Air Force Developing AMRAAM Replacement to Counter China". 20 June 2019.
488. Allison, George (21 February 2022). "Integration of Meteor missile on F-35B slips to 2027".
489. Hoyle2021-09-17T10:33:00+01:00, Craig. "Italy, UK to complete Meteor, Spear missile integration on F-35 fleets". FlightGlobal.{{cite web}}: CS1 maint: numeric names: authors list (link)
490. Michael Marrow (25 Sep 2023) Northrop nabs $705M Air Force award for new F-35 air-to-ground missile IOC 2026
491. Ewing, Philip (3 July 2012). "The Navy's advanced weapons shopping list". DoD buzz.com. Archived from the original on 6 September 2012. Retrieved 2 February 2021.
492. "Update: JSM successfully released from F-35A". Janes.com. 12 April 2021.
493. "Nuclear Posture Review Report" (PDF). U.S. Department of Defense. Washington, D.C. April 2010. Archived from the original (PDF) on 7 December 2014.
494. "AN/APG-81 Active Electronically Scanned Array (AESA) Fire Control Radar". Northrop Grumman.
495. "Northrop Grumman Developing the Next Generation Radar for the F-35 Lightning II". Retrieved 4 February 2023.
496. "F-35 Electro Optical Targeting System (EOTS)". Lockheed Martin.
497. "Electro-Optical Distributed Aperture System | Raytheon Intelligence & Space". Archived from the original on 24 March 2023.
498. BAE Systems (November 2018). "AN/ASQ-239 Electronic warfare/countermeasure system" (PDF). www.baesystems.com. Archived (PDF) from the original on 14 May 2023. Retrieved 16 May 2023.

Bibliography

• Hamstra, Jeffrey (2019). Hamstra, Jeffrey W. (ed.). The F-35 Lightning II: From Concept to Cockpit. American Institute of Aeronautics and Astronautics (AIAA). doi:10.2514/4.105678. ISBN 978-1-62410-566-1. S2CID 212996081.
• Keijsper, Gerald (2007). Lockheed F-35 Joint Strike Fighter. London: Pen & Sword Aviation. ISBN 978-1-84415-631-3.
• Lake, Jon. "The West's Great Hope". AirForces Monthly, December 2010.
• Polmar, Norman (2005). The Naval Institute Guide to the Ships and Aircraft of the U.S. Fleet. Annapolis, MD: Naval Institute Press. ISBN 978-1-59114-685-8.

Further reading

• Borgu, Aldo (2004). A Big Deal: Australia's Future Air Combat Capability. Canberra: Australian Strategic Policy Institute. ISBN 1-920722-25-4.
• Spick, Mike (2002). The Illustrated Directory of Fighters. London: Salamander. ISBN 1-84065-384-1.
• Winchester, Jim (2005). Concept Aircraft: Prototypes, X-Planes, and Experimental Aircraft. San Diego, CA: Thunder Bay Press. ISBN 978-1-59223-480-6. OCLC 636459025.

External links

• Official JSF web site Archived 27 October 2007 at the Wayback Machine
• Official F-35 Team web site
• F35 Lightning II | Northrop Grumman
• F-35 page on U.S. Naval Air Systems Command site Archived 7 March 2010 at the Wayback Machine
• F-35 – Royal Air Force