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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 now Honeywell Aerospace.

TFE731
TFE731-4R of a Cessna Citation VII
Type	Geared turbofan
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 Dassault Falcon 900 Hawker 800 Learjet 31 Textron AirLand Scorpion Lockheed Martin RQ-170 Sentinel
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

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 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

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 jets

Specifications

Data from FAA[6]

General characteristics

• Type: Geared turbofan
• Length: 49.7 in (126 cm)[7]
• Diameter: 39.4 in (100 cm)[7]
• Dry weight: 743–899 lb (337–408 kg)

Components

• Compressor: 1 stage fan, 1.8:1 gearbox,^{[citation needed]} 4 axial LP stages, 1 centrifugal HP 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

• Maximum thrust: 3,500–4,750 lbf (15.6–21.1 kN)
• 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

• Geared turbofan

Related development

• Honeywell/ITEC F124/F125

Comparable engines

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

Related lists

• List of aircraft engines

Notes

References

• 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 Aircraft Engines. Washington, DC: Smithsonian Institution. ISBN 1-56347-332-1.

External links

• Honeywell TFE731 official website

На других языках

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[de] Honeywell TFE731

Das Honeywell TFE731 (ursprünglich: Garrett AiResearch TFE731, militärische Ableitung ist das Honeywell F124) ist ein Turbofan-Triebwerk des US-amerikanischen Herstellers Honeywell. Es war das erste Turbofantriebwerk, das speziell für den Markt der Geschäftsreiseflugzeuge entwickelt wurde. Es ist ein Zweiwellentriebwerk, bei dem der Frontbläser (Fan) über ein Planetengetriebe von der Niederdruckturbine angetrieben wird. Das Bypassverhältnis lag zunächst zwischen 2,28 und 2,8. Das Triebwerk ist heute noch in Produktion und wird weiterentwickelt. Es ist wirtschaftlich außerordentlich erfolgreich. Bis 12/2006 wurden über 11.000 Einheiten der zivilen Varianten hergestellt.

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- [en] Garrett TFE731

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[es] Garrett TFE731

El Garrett TFE731, también conocido como Honeywell TFE731, es una familia de motores turbofán engranados. El motor fue desarrollado y fabricado por Garrett AiResearch, aunque debido a procesos de compra y fusión de la compañía, este mismo motor también ha sido fabricado por AlliedSignal y, actualmente, por Honeywell Aerospace. Desde su introducción al mercado aeronáutico, en el año 1972, se han fabricado más de 11.000 unidades, las cuales llevan acumuladas más de 100 millones de horas de vuelo.[1]

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[fr] Garrett TFE731

Les Garrett TFE731 (désormais « Honeywell TFE731 ») sont une famille de turbosoufflantes à engrenages couramment utilisées dans l'aviation d'affaires. Les moteurs furent à l'origine conçus et fabriqués par Garrett AiResearch, puis, en raison de fusions, furent produits plus tard par AlliedSignal, puis Honeywell Aerospace.

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[it] Garrett TFE731

I Garrett TFE731 (o Honeywell TFE731) compongono una famiglia di motori aeronautici turboventola, del tipo Geared Turbofan, comunemente usati su business jet. Originariamente il progetto venne ideato dalla Garrett Systems che a seguito di una serie di fusioni confluì nella Honeywell.

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