The Sikorsky S-64 was designed as an enlarged version of the prototype flying crane helicopter, the Sikorsky S-60. The S-64 had a six-blade main rotor and was powered by two 4,050 shaft horsepower (3,020kW)Pratt & Whitney JFTD12Aturboshaft engines. The prototype S-64 first flew on 9 May 1962 and was followed by two further examples for evaluation by the German armed forces.[2] The Germans did not place an order, but the United States Army placed an initial order for six S-64A helicopters (with the designation YCH-54A Tarhe). Seven S-64E variants were built by Sikorsky for the civil market.
Under Erickson
Originally a Sikorsky Aircraft product, the type certificate and manufacturing rights were purchased from them by Erickson Air-Crane in 1992. Since that time, Erickson Air-Crane has become the manufacturer and world's largest operator of S-64 Aircranes and has made over 1,350 changes to the airframe, instrumentation, and payload capabilities of the helicopter. The Aircrane can be fitted with a 2,650USgal (10,000L) fixed retardant tank to assist in the control of bush fires.[3] The helicopter is capable of refilling its entire tank of water in 45 seconds from a water slide 18in (46cm) thick.[4]
S-64 Aircranes have been sold to the Italian and Korean Forest Services for fire suppression and emergency response duties. Those in the Erickson Air-Crane fleet are leased worldwide to organizations, companies, and federal government agencies for either short-term or longer term use in fire suppression, civil protection, heavy lift construction, and timber harvesting. Erickson is manufacturing new S-64s, as well as remanufacturing existing CH-54s.
Erickson gives each of its S-64s an individual name, the best-known being "Elvis", used in fighting fires in Australia alongside "The Incredible Hulk" and "Isabelle". Other operators, such as Siller Brothers, have followed with their Sikorsky S-64E, Andy's Pride. The Erickson S-64E nicknamed "Olga" was used to lift the top section of the CN Tower into place in Toronto, Ontario, Canada.[5]
Sikorsky Skycrane
Skycrane "Olga" lifting a CN Tower antenna segment
S-64
Twin-engined heavy-lift helicopter, 3 built. 1 rebuilt as S-64E.
S-64A
Six test and evaluation helicopters for the US Army.
S-64B
Civil version of CH-54A, 7 built.
Erickson
S-64E
Upgraded CH-54A helicopters, plus one new build aircraft; 17 aircraft in total.
S-64F
Upgraded CH-54B helicopters; powered by two Pratt & Whitney JFTD12-5A engines; 13 aircraft in total.
S-64F+
Proposed upgraded version with new engines, avionics, and optional piloting.[6]
An Erickson S-64 making a water dropItalian Forest Service S-64F
N189AC "Gypsy Lady" – crashed in Ojai, California on 1 October 2006. While operating for the USFS, the Erickson S-64 snagged a dip tank and the helicopter rolled over and crashed.[17]
N198AC "Shirley Jean" – S-64F; sold to European Air-Crane c.2006 as I-SEAD; crashed in Italy on 2007-04-26.[18] Aircraft was destroyed in a post-crash fire.[19]
N248AC "Aurora" – S-64E; named after Aurora State Airport, home to Columbia Helicopters, former owner of aircraft.[8] Crashed on 26 August 2004 in Corsica, killing its Canadian pilot and French co-pilot. The aircrane was chartered by the interior ministry to fight fires on the French Mediterranean island of Corsica. It had been fighting a wildfire as it went down near the village of Ventiseri, trying to return to a nearby military base, due to technical problems associated with inflight breakup.[20][21]
N173AC "Christine" – S-64E; ditched into a small dam within Melbourne's water catchment with no casualties during a firefighting operation in Gippsland, Victoria, Australia on 28 January 2019. The crew, consisting of 2 pilots and the flight engineer, were able to bail from the aircraft in 2-3m of water and swim to safety with no life-threatening injuries.[22] The aircraft was rebuilt at Erickson's Central Point, Oregon facility and flew again in early 2021.
N4037S - An S-64E operated by Siller Helicopters sustained damage to the right main landing gear wheel and tire assembly after a midair collision with a Bell 407 near Cabazon, California while both aircraft were responding to a reported fire on 6 August 2023. The S-64 landed near the collision site with no injuries to the two pilots on board. The Bell 407 sustained substantial damage in the collision, leaving a debris field approximately 1000 feet in length before coming to rest on a rocky hillside where it was consumed by a post-crash fire. The contract pilot along with a Cal Fire Assistant Chief and Cal Fire Captain on board the Bell 407 were killed. [23]
Data from The International Directory of Civil Aircraft[24]
General characteristics
Crew: 3 (pilot, co-pilot), plus one rear-facing aft-stick operator during external-load operations[lower-alpha 1]
Capacity: up to 5 total people[lower-alpha 2] / 20,000lb (9,100kg) payload
The minimum crew is two and the aft-stick operation can be done by the co-pilot
The helicopter has five seats but the two observer seats can not be used during external load operations, if the aft-stick seat is used when not used for external-load operations then the controls have to be disengaged and guarded.
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