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.
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 hr have been logged by 1,400 in service engines and it has a 99.9% dispatch reliability rate, Borescope inspections extends time between overhaul and some engines have remained installed for up to 10,000 hr. 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. Its architecture could be extended for a range of 8,000 to 10,000 lbf thrust.
HTF7000 / AS9076,826 lbf (30.36 kN) original variant of the engine. Developed for the
Bombardier Challenger 300.
AS977Higher 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.
HTF7250G7,624 lbf (33.91 kN) variant developed for use on the
Gulfstream G280HTF73507,323 lbf (32.57 kN) Variant developed for use on the Bombardier Challenger 350.
HTF7500E6,540–7,036 lbf (29.09–31.30 kN) variant developed for the Embraer Legacy 500/450 business jets.
HTF7700L7,550 lbf (33.6 kN) for the
Cessna Citation LongitudeAvro RJXBombardier Challenger 300/350Cessna Citation LongitudeGulfstream G280Embraer Legacy 500/450Data from FAA
Type: TurbofanLength: 92.4 in (234.7 cm)Diameter: 34.2 in (87 cm) FanDry 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 centrifugalCombustors: annular combustorTurbine: two stage HP turbine, three stage LP turbineOil system: pressure spray with scavenge and dry sumpMaximum thrust: 6,944–7,638 lbf (30.89–33.98 kN)Overall pressure ratio: 28.2Bypass ratio: 4.4Turbine inlet temperature: Maximum indicated Interturbine Temperature : continuous 1,702–1,742 °F (928–950 °C), Take-off 1,735–1,751 °F (946–955 °C)Fuel consumption: 950 lb. per hourThrust-to-weight ratio: 4.53 - 4.98 
