The Garrett TFE731 (now Honeywell TFE731) is a family of geared turbofan engines commonly used on

business jet A business jet, private jet, or bizjet is a jet aircraft designed for transporting small groups of people. Business jets may be adapted for other roles, such as the evacuation of casualties or express parcel deliveries, and some are used by pub ...

aircraft. Garrett AiResearch originally designed and built the engine, which due to mergers was later produced by

AlliedSignal AlliedSignal was an American aerospace, automotive and engineering company created through the 1985 merger of Allied Corp. and Signal Companies. It subsequently purchased Honeywell for $14.8 billion in 1999, and thereafter adopted the Honeywell n ...

and now Honeywell Aerospace. Since the engine was introduced in 1972, over 11,000 engines have been built, flying over 100 million flight-hours.

Development

Dassault Falcon 900EX, Italy - Air Force JP6346097

The TFE731 was based on the core of the TSCP700, which was specifically developed for use as the auxiliary power unit (APU) on the

McDonnell Douglas DC-10 The McDonnell Douglas DC-10 is an American trijet wide-body aircraft manufactured by McDonnell Douglas. The DC-10 was intended to succeed the DC-8 for long-range flights. It first flew on August 29, 1970; it was introduced on August 5, 1971, ...

. The design featured two important factors: low fuel consumption, and low noise profiles that met the newly established U.S. noise abatement regulations. The first test run of the TFE731 occurred in 1970 at Garrett's plant in

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. The first production model, the TFE731-2, began rolling off the assembly line in August, 1972, and was used on the

Learjet 35/36 The Learjet Model 35 and Model 36 are a series of American multi-role business jets and military transport aircraft manufactured by Learjet. When used by the United States Air Force they carry the designation C-21A. The aircraft are powered by ...

and Dassault Falcon 10, both of which entered production in 1973. The TFE731-3 was developed for use in the

Lockheed JetStar The Lockheed JetStar (company designations L-329 and L-1329; designated C-140 in US military service) is a business jet produced from the early 1960s to the 1970s. The JetStar was the first dedicated business jet to enter service, as well as t ...

re-engining program, and subsequent versions of it have been used on a number of aircraft, including the

Learjet 55 The Learjet 55 "Longhorn" is an American business jet manufactured by Learjet. Development and design The Learjet 50 series was first announced at the 1977 Paris air show with larger cabins than the existing Learjets. The series was to have thre ...

. In 1975, the TFE731 was named Aviation Product of the Year by

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. The -5 model was certified in 1982, and a decade later, an engine utilizing the TFE731-5 power section and a TFE731-3 fan was built and designated the TFE731-4, intended to power the Cessna Citation VII aircraft. The most recent version is the TFE731-50, based on the -60 used on the Falcon 900DX, which underwent its flight test program in 2005. Honeywell has developed this engine complete with nacelle as a candidate to retrofit a number of aircraft equipped with older engines.

Design

The TFE731-60 has an inlet diameter of 0.787 m. The fan consists of 22 fan blades, 52 exit-guide vanes, and ten struts, and is driven by a gearbox. The five-stage compressor has four axial (LP) stages and one radial or centrifugal (HP) stage.

Variants

;TFE731-2 ;TFE731-3 ;TFE731-4 ;TFE731-5 ;TFE731-20 ;TFE731-40 ;TFE731-50 ;TFE731-60 ;TFE731-1100

Applications

Jet trainers

Business jet A business jet, private jet, or bizjet is a jet aircraft designed for transporting small groups of people. Business jets may be adapted for other roles, such as the evacuation of casualties or express parcel deliveries, and some are used by pub ...

Specifications

Notes

References

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External links

Honeywell TFE731 official website
{{Garrett/Honeywell aeroengines Centrifugal-flow turbojet engines Geared turbofan engines

TFE731 The Garrett TFE731 (now Honeywell TFE731) is a family of geared turbofan engines commonly used on business jet aircraft. Garrett AiResearch originally designed and built the engine, which due to mergers was later produced by AlliedSignal and no ...

Medium-bypass turbofan engines Mixed-compressor gas turbines 1970s turbofan engines