Honeywell HTF7000
| 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] |
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]
Operational history
[edit]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
[edit]Specifications
[edit]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
[edit]Related development
Comparable engines
Related lists
References
[edit]- ^ "AlliedSignal powers up AS900 turbofan". Flight Global. 18 August 1999.
- ^ a b c "Honeywell Engine Receives Certification for Textron Aviation's Cessna Citation Longitude" (Press release). Honeywell. October 5, 2017. Archived from the original on October 6, 2017. Retrieved October 6, 2017.
- ^ a b c d e David Esler (Oct 27, 2016). "Honeywell's Super-Midsize HTF7000 Engine". Business & Commercial Aviation. Aviation Week.
- ^ a b "Honeywell gives AS907 turbofan redesignation". Flight International. 13 January 2004.
- ^ Fred George (Nov 1, 2014). "Pilot Report: Bombardier Challenger 350". Business & Commercial Aviation. Aviation Week.
- ^ "The 7X factors". Flight Daily News. June 14, 2003. Retrieved July 17, 2020.
- ^ a b c d e f "Honeywell AS907 engine service bulletin: Reduced intervals for oil filter analysis & ECU". September 2019. Retrieved July 29, 2020.
- ^ Lowe, Paul (April 23, 2008). "Honeywell's AS907 gets nod, production begins". Aviation International News. Vol. 34, no. 18 (published August 2002). pp. 32–33.
- Lowe, Paul (31 July 2002). "Honeywell's AS907 gets Nod, Production Begins". Aviation International News (Catalog record).
- ^ "G280 Specifications" (PDF). Gulfstream. 2015. Archived from the original (PDF) on 2016-07-05. Retrieved 2016-06-27.
- ^ Guy Norris (24 May 2010). "Embraer's Legacy 450/500 Engine Enters Test At Honeywell". Aviation Week & Space Technology.
- ^ "Cessna showcases new Citation Longitude at NBAA 2015; announces large cabin Citation Hemisphere" (Press release). Textron Aviation. 16 November 2015.
- ^ Epstein, Curt (May 31, 2007). "HTF10000 moves toward late-'08 core run". Business Aviation. AINonline. Retrieved July 17, 2020.
- ^ "AS907 Type Certificate Data Sheet, Revision 7" (PDF). FAA. 22 March 2016. Archived from the original (PDF) on 15 November 2016. Retrieved 27 June 2016.
- ^ "Honeywell HTF7000". Flug Revue. 18 April 2013. Archived from the original on 1 December 2016. Retrieved 1 December 2016.
- ^ a b c "NBAA 2006: Engine giants power up for growth". Flight Global. 17 October 2006.
- ^ Fred George (Feb 25, 2016). "Honeywell HTF7700L Turbofans". Business & Commercial Aviation. Aviation Week.
- ^ a b "Honeywell HTF7000" (PDF). Aviation gas turbine forecast. Forecast International (Report). September 2010. p. 2.
- ^ Élodie Roux (2007). "AS907". Turbofan and turbojet engines: Database handbook. Elodie Roux. p. 67. ISBN 9782952938013. OCLC 879328119.
External links
[edit]
- "HTF7000 Turbofan Engine". Honeywell.
- Winstanley, David K. (September 25, 2013). HTF7000 engine design, development and uses. SAE 2013 AeroTech Congress & Exhibition. SAE International Journal of Aerospace. Vol. 6, no. 2. Montreal, Quebec, Canada: Society of Automotive Engineers (SAE). pp. 545–554. doi:10.4271/2013-01-2228. ISSN 1946-3855. OCLC 5817999777.