Engineering:Honeywell HTF7000
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Short description: Aircraft engine
| 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
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
- Honeywell ALF 502/Honeywell LF 507
Comparable engines
- Pratt & Whitney Canada PW300
- Rolls-Royce AE 3007
Related lists
References
- ↑ "AlliedSignal powers up AS900 turbofan". Flight Global. 18 August 1999. https://www.flightglobal.com/news/articles/alliedsignal-powers-up-as900-turbofan-55058/.
- ↑ 2.0 2.1 2.2 "Honeywell Engine Receives Certification for Textron Aviation's Cessna Citation Longitude" (Press release). Honeywell. October 5, 2017.
- ↑ 3.0 3.1 3.2 3.3 3.4 David Esler (Oct 27, 2016). "Honeywell's Super-Midsize HTF7000 Engine". Business & Commercial Aviation. Aviation Week. http://aviationweek.com/bca/honeywell-s-super-midsize-htf7000-engine.
- ↑ 4.0 4.1 "Honeywell gives AS907 turbofan redesignation". Flight International. 13 January 2004. https://www.flightglobal.com/news/articles/honeywell-gives-as907-turbofan-redesignation-176266/.
- ↑ Fred George (Nov 1, 2014). "Pilot Report: Bombardier Challenger 350". Business & Commercial Aviation (Aviation Week). http://aviationweek.com/business-aviation/pilot-report-bombardier-challenger-350.
- ↑ "The 7X factors". Flight Daily News. June 14, 2003. https://www.flightglobal.com/the-7x-factors/48820.article.
- ↑ 7.0 7.1 7.2 7.3 7.4 7.5 "Honeywell AS907 engine service bulletin: Reduced intervals for oil filter analysis & ECU". September 2019. https://www.duncanaviation.aero/intelligence/2019/September/honeywell-as907-engine-service-bulletin-reduced-intervals-for-oil-filter-analysis-ecu.
- ↑ Lowe, Paul (April 23, 2008). "Honeywell's AS907 gets nod, production begins". Aviation International News 34 (18): 32–33. August 2002. http://www.ainonline.com/?q=aviation-news/aviation-international-news/2008-04-23/honeywells-as907-gets-nod-production-begins.
- ↑ "G280 Specifications". Gulfstream. 2015. http://www.gulfstream.com/images/uploads/brochures/aircraft/G280SpecSheet.pdf.
- ↑ Guy Norris (24 May 2010). "Embraer's Legacy 450/500 Engine Enters Test At Honeywell.". Aviation Week & Space Technology. http://aviationweek.com/awin/embraer-s-legacy-450500-engine-enters-test-honeywell.
- ↑ "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". AINonline. https://www.ainonline.com/aviation-news/aviation-international-news/2007-05-31/htf10000-moves-toward-late-08-core-run.
- ↑ "AS907 Type Certificate Data Sheet, Revision 7". FAA. 22 March 2016. http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/0/71e6600430a5dd4086257f7d0078ab4d/$FILE/E00010LA_Rev_7.pdf.
- ↑ "Honeywell HTF7000". Flug Revue. 18 April 2013. http://www.flugrevue.de/flugzeugbau/triebwerke/honeywell-htf7000/470926.
- ↑ 15.0 15.1 15.2 "NBAA 2006: Engine giants power up for growth". Flight Global. 17 October 2006. https://www.flightglobal.com/news/articles/nbaa-2006-engine-giants-power-up-for-growth-210011/.
- ↑ Fred George (Feb 25, 2016). "Honeywell HTF7700L Turbofans". Business & Commercial Aviation (Aviation Week). http://aviationweek.com/bca/honeywell-htf7700l-turbofans.
- ↑ 17.0 17.1 "Aviation gas turbine forecast". Forecast International: 2. September 2010.
- ↑ Élodie Roux (2007). Turbofan and turbojet engines: Database handbook. p. 67. ISBN 9782952938013. OCLC 879328119.
External links
- "HTF7000 Turbofan Engine". Honeywell. https://aerospace.honeywell.com/en/products/engines/htf7000-turbofan-engine.
- Winstanley, David K. (September 25, 2013). "HTF7000 engine design, development and uses". SAE 2013 AeroTech Congress & Exhibition. 6. Montreal, Quebec, Canada: Society of Automotive Engineers (SAE). pp. 545–554. doi:10.4271/2013-01-2228. OCLC 5817999777.
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