Garrett (Allied Signal) TFE731-3R Turbofan Engine


Display Status:

This object is on display in the Boeing Aviation Hangar at the Steven F. Udvar-Hazy Center in Chantilly, VA.

Garrett (Allied Signal) TFE731-3R Turbofan Engine

Collection Item Summary:

The AlliedSignal TFE731 was largely responsible for the broad-scale introduction of medium-size corporate fanjet aircraft, a trend that began in the early 1970s. The engine's low specific fuel consumption greatly increased the range of corporate jet aircraft. The TFE731 is used on many types of business jets, including Bombardier Learjets, Dassault Falcons, Cessna Citations, Raytheon Hawker 800s, and Israel Aircraft Industries 1125 Astras.

As one of the first development engines for the TFE731-3 engine series, this engine has been rebuilt nearly 200 times for various development and certification testing programs. It has undergone more than 2,000 hours of hard testing in the manufacturer's test cell facilities in Phoenix, Arizona, and on a Falcon 20 jet aircraft. This testing resulted in many improvements to the TFE731 series, including the development of a low-smoke combustion system and enhanced engine controls.

Collection Item Long Description:



Inventory Number


Physical Description

  • Type: Turbofan, two-shaft, geared
  • Thrust/speed: 16,500 N (3,700 lb) at 29,692 rpm
  • Fan: Bypass ratio 2.8:1, single-stage,
  • Compressor: 4-stage low-pressure axial, 1-stage high-pressure centrifugal
  • Combustor: Annular reverse flow
  • Turbine: Single-stage high-pressure, 3-stage low-pressure
  • Weight: 342 kg (754 lb)

Credit Line

Gift of AlliedSignal Aerospace



Ivan Speer

Country of Origin

United States of America


  • Engine Components - Various alloys of aluminum, steel, etc.
  • Hoses/Clamps - Rubber
  • Protective Caps - Plastic


  • Overall: 754lb. (342kg)
  • Other: 28 3/16in. (71.6cm)
  • Other (Core length): 49 3/4in. (126.3cm)
  • Display (Engine on Stand): 1 ft. 11 7/16 in. × 1 ft. 2 3/8 in. × 1 ft. 10 15/16 in., 446.8kg (59.5 × 36.5 × 58.3cm, 985lb.)

Data Source

National Air and Space Museum

Restrictions & Rights

Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum


PROPULSION-Turbines (Jet)

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