Honeywell HTF7000
Aircraft engine From Wikipedia, the free encyclopedia
The Honeywell HTF7000 is a turbofan engine produced by Honeywell Aerospace. Rated in the 6,540–7,624 lbf (29.09–33.91 kN) range, the HTF7000 is used on the Bombardier Challenger 300/350, Gulfstream G280, Embraer Legacy 500/450 and the Cessna Citation Longitude. Its architecture could be extended for a range of 8,000 to 10,000 lbf (36 to 44 kN) thrust.[3]
| HTF7000 | |
|---|---|
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| Type | Turbofan |
| National origin | United States |
| Manufacturer | Honeywell Aerospace |
| First run | 1999[1] |
| Major applications | Bombardier Challenger 300/350 Cessna Citation Longitude Embraer Legacy 500/450 Gulfstream G280 |
| Number built | Approaching the 2,000th[2] |
Operational history
The engine was originally designated the AS907, which was changed in 2004 to HTF7000; the AS907 designation is still used for legal and regulatory use.[4] By October 2016, 2.6 million hours had been logged by 1,400 in service engines and it has a 99.9% dispatch reliability rate. Average fuel consumption is about 950 lb. per hour for a 7,765 lbf engine on a G280, to be compared to 875 lb. per hour for a 4,420 lbf TFE731 on a G150.[3] More than 3.5 million flight hours have been logged till October 2017, and the 2,000th engine should be delivered in 2018.[2]
Honeywell maintenance program is $447 for two engines per hour.[5] Borescope inspections extends time between overhaul and some engines have remained installed for up to 10,000 hr.[3] It has line replaceable components installed with hand tools and is designed for condition-based maintenance.[2]
Variants
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- HTF5000 / AS905
- A 5,000 lbf (22 kN; 2,300 kgf) thrust variant,[4] unsuccessfully targeted toward the Dassault Falcon 7X.[6]
- HTF7000 / AS907-1-1A[7]
- 6,826 lbf (30.36 kN) original variant of the engine. Developed for the Bombardier Challenger 300.
- AS977
- Higher thrust variant of the AS907, designed at the same time, intended to power BAE System's Avro RJX.[8] The aircraft was cancelled after three airframes were built and flown; subsequently this variant never entered production.
- HTF7250G / AS907-2-1G[7]
- 7,624 lbf (33.91 kN) variant developed for use on the Gulfstream G280.[9]
- HTF7350 / AS907-2-1A[7]
- 7,323 lbf (32.57 kN) Variant developed for use on the Bombardier Challenger 350.
- HTF7500E / AS907-3-1E[7]
- 6,540–7,036 lbf (29.09–31.30 kN) variant developed for the Embraer Legacy 500/450 business jets[10] and the Praetor 500/600.[7]
- HTF7700L / AS907-2-1S[7]
- 7,550 lbf (33.6 kN) for the Cessna Citation Longitude.[11]
- HTF10000
- A 10,000 lbf (44 kN; 4,500 kgf) nominal thrust variant.[12]
Applications
Specifications
Data from FAA.[13]
General characteristics
- Type: Turbofan
- Length: 92.4 in (234.7 cm)[14]
- Diameter: 34.2 in (87 cm) fan[15]
- Dry weight: 1,514–1,534 lb (687–696 kg)
Components
- Compressor: 22 internally reinforced blades fan,[3] 16:1 pressure ratio HP: four stage axial + one stage centrifugal[16]
- Combustors: Annular
- Turbine: Two stage HP turbine, three stage LP turbine
- Oil system: Pressure spray with scavenge and dry sump[verification needed]
Performance
- Maximum thrust: 6,944–7,638 lbf (30.89–33.98 kN)
- Cruise thrust: 1,910 lbf (8.5 kN)[17]
- Overall pressure ratio: 28.2[15]
- Bypass ratio: 4.4:1[15]
- Fuel consumption: 950 lb/h (430 kg/h)[3]
- Specific fuel consumption: Static sea level: 0.42 lb/(lbf⋅h) (12 g/(kN⋅s));[18] Cruise: 0.642 lb/(lbf⋅h) (18.2 g/(kN⋅s))[17]
- Power-to-weight ratio: 4.53 - 4.98
See also
Related development
Comparable engines
Related lists
References
External links
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