|installed on a Bombardier Challenger 300|
|National origin||United States|
|Major applications||Bombardier Challenger 300/350
Embraer Legacy 500/450
|Number built||approaching the 2,000th|
The Honeywell HTF7000 is a turbofan engine produced by Honeywell Aerospace. Rated in the 6,540–7,624 pounds-force (29.09–33.91 kN) range, the HTF7000 is used on the Bombardier Challenger 300/350, Gulfstream G280 and Embraer Legacy 500/450 and is planned for the new Cessna Citation Longitude. Its architecture could be extended for a range of 8,000 to 10,000 lbf thrust.
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. In October 2016, 2.6 million hours have 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. More than 3.5 million flight hours have been logged till October 2017, and the 2,000th engine should be delivered in 2018.
Honeywell maintenance program is $447 for two engines per hour. Borescope inspections extends time between overhaul and some engines have remained installed for up to 10,000 hr. It has line replaceable components installed with hand tools and is designed for on-condition maintenance.
- HTF7000 / AS907
- 6,826 lbf (30.36 kN) original variant of the engine. Developed for the Bombardier Challenger 300.
- Higher thrust variant of the AS907, designed at the same time, intended to power BAE System's Avro RJX. The aircraft was cancelled after 3 airframes were built and flown and subsequently this engine variant never entered full production.
- 7,323 lbf (32.57 kN) Variant developed for use on the Bombardier Challenger 350.
- 6,540–7,036 lbf (29.09–31.30 kN) variant developed for the Embraer Legacy 500/450 business jets.
- Avro RJX
- Bombardier Challenger 300/350
- Cessna Citation Longitude
- Gulfstream G280
- Embraer Legacy 500/450
Data from FAA
- Type: Turbofan
- Length: 92.4 in (234.7 cm)
- Diameter: 34.2 in (87 cm) Fan
- Dry weight: 1,514–1,534 lb (687–696 kg)
- Compressor: 21 internally reinforced blades fan, 16:1 compression ratio HP: four stage axial + one stage centrifugal
- Combustors: annular combustor
- Turbine: two stage HP turbine, three stage LP turbine
- Oil system: pressure spray with scavenge and dry sump[verification needed]
- Maximum thrust: 6,944–7,638 lbf (30.89–33.98 kN)
- Overall pressure ratio: 28.2
- Bypass ratio: 4.4
- Fuel consumption: 950 lb. per hour
- Thrust-to-weight ratio: 4.53 - 4.98
- "AlliedSignal powers up AS900 turbofan". Flight Global. 18 August 1999.
- "Honeywell Engine Receives Certification for Textron Aviation's Cessna Citation Longitude" (Press release). Honeywell. October 5, 2017.
- David Esler (Oct 27, 2016). "Honeywell's Super-Midsize HTF7000 Engine". Business & Commercial Aviation. Aviation Week.
- "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.
- Paul Lowe (April 23, 2008). "Honeywell's AS907 gets nod, production begins". Aviation International News.
- "G280 Specifications" (PDF). Gulfstream. 2015.
- 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.
- "AS907 Type Certificate Data Sheet, Revision 7" (PDF). FAA. 22 March 2016.
- "Honeywell HTF7000". Flug Revue. 18 April 2013.
- "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.
- "HTF7000 Turbofan Engine". Honeywell.
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