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The Garrett TFE731
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 now Honeywell Aerospace. Since the engine was introduced in 1972, over 11,000 engines have been built, flying over 100 million flight-hours.[1]

Contents

1 Development 2 Design 3 Variants 4 Applications 5 Specifications (TFE731-2)

5.1 General characteristics 5.2 Components 5.3 Performance

6 See also 7 Notes 8 References 9 External links

Development[edit]

Honeywell TFE731 and S-duct intake of a Dassault Falcon 900EX exposed during maintenance

View of a TFE731-4R in maintenance with cowlings, afterbody and thrust reverser removed.

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 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 Torrance, California.[2] The first production model, the TFE731-2, began rolling off the assembly line in August, 1972, and was used on the Learjet 35/36 and Dassault Falcon 10, both of which entered production in 1973. The TFE731-3 was developed for use in the Lockheed JetStar
Lockheed JetStar
re-engining program, and subsequent versions of it have been used on a number of aircraft, including the Learjet 55. In 1975, the TFE731 was named Aviation Product of the Year by Ziff-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 the Cessna Citation VII aircraft.[4] 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.[5] Design[edit] 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[edit]

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

Applications[edit]

Aero L-139 (prototype only) AIDC AT-3 Boeing Skyfox British Aerospace BAe 125
British Aerospace BAe 125
Series 700 CASA C-101 Cessna Citation III/VI/VII Dassault Falcon 10 Dassault Falcon 20
Dassault Falcon 20
(retrofit) Dassault Falcon 50 Dassault Falcon 900 FMA IA 63 Pampa Gulfstream G100/G150/C-38 Courier (formerly IAI 1125 Astra SPX) Hawker 800/850XP/900XP Hongdu JL-8 IAI Westwind Learjet 31 Learjet 35/C-21 Learjet 40 Learjet 45 Learjet 55 Learjet 70 Lockheed JetStar/Jetstar II North American Sabreliner
North American Sabreliner
(NA-465 model) Textron AirLand Scorpion

Specifications (TFE731-2)[edit] Data from [6] General characteristics

Type: Turbofan Length: 50 in (127 cm) Diameter: 39 in (100 cm) Dry weight: 734 lb (333 kg)

Components

Compressor: 1 stage fan, 4 axial low pressure compressor stages, 1 centrifugal high pressure compressor stage Combustors: Annular Turbine: 1 stage high pressure turbine, 3 stage low pressure turbine

Performance

Maximum thrust: 3500 lbf (15.6 kN) Overall pressure ratio: 13:1 Fuel consumption: 875 lb. per hour[7] Specific fuel consumption: 0.5 lb/lbf-hr Thrust-to-weight ratio: 4.7:1

See also[edit]

Geared turbofan

Related development

Honeywell/ITEC F124/F125

Comparable engines

Honeywell ALF 502/LF 507 Pratt & Whitney PW1000G Turbomeca Aspin/Astafan IAE SuperFan Rolls-Royce/SNECMA M45SD

Related lists

List of aircraft engines

Notes[edit]

^ "TFE731". Honeywell.  ^ Schoneberger, William A.; Scholl, Robert R. H. (1985). Out of Thin Air: Garrett's First 50 Years. Phoenix: Garrett Corporation. p. 205. ISBN 0-9617029-0-7.  ^ Schoneberger, p. 204. ^ "An Historical Look at the TFE731 Engine" (PDF). Duncan Debrief. Summer 2001. p. 11.  ^ "Honeywell TFE731-50 Turbofan
Turbofan
Engine Completes First Flight" (Press release). Honeywell. 2005-05-18. Retrieved 2006-12-05.  ^ "Gas Turbine
Turbine
Engines" (PDF). Aviation Week & Space Technology Source Book. 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. ISBN 0-7509-4479-X.  Leyes II, Richard A.; William A. Fleming (1999). "10". The History of North American Small Gas Turbine
Turbine
Aircraft Engines. Washington, DC: Smithsonian Institution. ISBN 1-56347-332-1. 

External links[edit]

Wikimedia Commons has media related to Honeywell TFE731.

Honeywell TFE731 official website

v t e

Garrett/AlliedSignal/Honeywell aircraft engines

Turboprops/Turboshafts

AGT1500 HTS900 LTS101/LTP101* T53* T55* TPE331 TPF351

Turbofans

ALF 502* ATF3 F109 FX5 HTF7000 (AS907) LF507* TFE731

Joint development

CFE Company:

CFE738 (Turbofan)

General Electric/Honeywell:

LV100 (Turboshaft)

International Turbine
Turbine
Engine Corporation:

F124/TFE1042 F125 (Turbofans)

LHTEC:

CTS800 (Turboshaft)

Note: AVCO Lycoming/Textron Lycoming engines m

.