TheGarrett TFE731(nowHoneywell TFE731) is a family ofgeared turbofanengines commonly used onbusiness jetaircraft.Garrett AiResearchoriginally designed and built the engine, which due to mergers was later produced byAlliedSignaland nowHoneywell Aerospace.
| 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 |
Since the engine was introduced in 1972, over 11,000 engines have been built, flying over 100 million flight-hours.[1]
Development
edit
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 35/36andDassault Falcon 10,both of which entered production in 1973.
The TFE731-3 was developed for use in theLockheed JetStarre-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 VIIaircraft.[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]
Design
editThe 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
edit- TFE731-2
- TFE731-3
- TFE731-4
- TFE731-5
- TFE731-20
- TFE731-40
- TFE731-50
- TFE731-60
- TFE731-1100
Applications
edit- BAe 125/Hawker 800
- Cessna Citation III/VI/VII
- Dassault Falcon 10
- Dassault Falcon 20(retrofit)
- Dassault Falcon 50
- Dassault Falcon 900
- Gulfstream G100(ex IAI Astra)
- IAI Westwind
- Learjet 31
- Learjet 35
- Learjet 40
- Learjet 45
- Learjet 55
- Learjet 70
- Lockheed JetStar/Jetstar II
- North American Sabreliner65
- ExperimentalYak-40MS upgrade
Specifications
editData fromFAA[6]
General characteristics
- Type:Geared turbofan
- Length:49.7in(126cm)[7]
- Diameter:39.4 in (100 cm)[7]
- Dry weight:743–899lb(337–408kg)
Components
- Compressor:1 stage fan, 1.8:1gearbox,[citation needed]4axialLP stages, 1centrifugalHP stage
- Combustors:Annular
- Turbine:1 stage HP turbine (N2 max. 29,692-30,540 RPM), 3 stage LP turbine (N1 max. 20,688-21,000 RPM)
Performance
- Maximumthrust:3,500–4,750lbf(15.6–21.1kN)
- Overall pressure ratio:13:1[7]
- Bypass ratio:2.8:1[citation needed]
- Fuel consumption:875 lb/h (397 kg/h)[8]
- Specific fuel consumption:0.469–0.517 lb/lbf/h (0.0133–0.0146 kg/kN/s)[7]
- Thrust-to-weight ratio:4.7-5.3
See also
editRelated development
Comparable engines
- IAE SuperFan
- Lycoming ALF 502/LF 507
- Pratt & Whitney PW1000G
- Rolls-Royce/SNECMA M45SD
- Turbomeca Aspin/Astafan
Related lists
Notes
edit- ^"TFE731".Honeywell. Archived fromthe originalon 2006-11-03.Retrieved2006-12-05.
- ^Schoneberger, William A.; Scholl, Robert R. H. (1985).Out of Thin Air: Garrett's First 50 Years.Phoenix: Garrett Corporation. p. 205.ISBN0-9617029-0-7.
- ^Schoneberger, p. 204.
- ^"An Historical Look at the TFE731 Engine"(PDF).Duncan Debrief.Summer 2001. p. 11.
- ^"Honeywell TFE731-50 Turbofan Engine Completes First Flight"(Press release). Honeywell. 2005-05-18. Archived fromthe originalon 2016-03-03.Retrieved2006-12-05.
- ^"type-certificate data sheet no. E6WE"(PDF).FAA. May 9, 2000. Archived fromthe original(PDF)on November 15, 2016.RetrievedSeptember 3,2020.
- ^abcd"Gas Turbine Engines".Aviation Week & Space Technology.Jan 26, 2009. p. 119.
- ^David Esler (Oct 27, 2016)."Honeywell's Super-Midsize HTF7000 Engine".Business & Commercial Aviation.Aviation Week.
References
edit- Gunston, Bill (2006).World Encyclopedia of Aero Engines, 5th Edition.Phoenix Mill, Gloucestershire, England, UK: Sutton Publishing Limited.ISBN0-7509-4479-X.
- Leyes II, Richard A.; William A. Fleming (1999). "10".The History of North American Small Gas Turbine Aircraft Engines.Washington, DC: Smithsonian Institution.ISBN1-56347-332-1.
External links
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- Honeywell TFE731 official websiteArchived2016-11-19 at theWayback Machine