| TFE731 | |
|---|---|
 | |
| TFE731-4R of aCessna Citation VII | |
| Type | Gearedturbofan |
| National origin | United States |
| Manufacturer | Garrett AiResearch Honeywell Aerospace |
| First run | 1970 |
| Major applications | AIDC AT-3 CASA C-101 Cessna Citation III Hongdu JL-8 |
| Number built | 11,000+ |
| Developed into | Honeywell/ITEC F124/F125 |
TheGarrett TFE731 (now Honeywell TFE731) is a family ofgeared turbofan engines commonly used onbusiness jet aircraft.Garrett AiResearch originally designed and built the engine, which due to mergers was later produced byAlliedSignal and nowHoneywell Aerospace.
Since the engine was introduced in 1972, over 11,000 engines have been built, flying over 100 million flight-hours.[1]
The TFE731 was based on the core of theTSCP700, which was specifically developed for use as theauxiliary power unit (APU) on theMcDonnell Douglas DC-10. 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 inTorrance, California.[2] The first production model, the TFE731-2, began rolling off the assembly line in August, 1972, and was used on theLearjet 35/36 andDassault Falcon 10, both of which entered production in 1973.
The TFE731-3 was developed for use in theLockheed JetStar re-engining program, and subsequent versions of it have been used on a number of aircraft, including theLearjet 55.
In 1975, the TFE731 was named Aviation Product of the Year byZiff-Davis Publishing Company.[3]
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 theCessna Citation VII aircraft.[4]
The most recent version is the TFE731-50, based on the -60 used on theFalcon 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.[5]
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.
Data from FAA[6]
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