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The Garrett F109 (Company designation TFE109) was a small turbofan engine developed for the Fairchild T-46 by Garrett AiResearch. With the United States Air Force's cancellation of the T-46 program in 1986, further development of the engine ceased, and with it the civil TFE109 version.

F109 / TFE109
Type	Turbofan
National origin	United States
Manufacturer	Garrett AiResearch
First run	1980s
Major applications	Fairchild T-46
Developed into	LHTEC T800

Variants

ATE109

The Advanced Technology Engine (ATE) turboshaft, which was built jointly with Allison for the Light Helicopter Experimental (LHX) powerplant program and included the F109 power section.[1]

TSE109

A turboshaft demonstrator in the 1,200 shaft horsepower (890 kilowatts) power class that first ran on August 2, 1984.[1]

TFE109

The civil version of the F109.

F109-GA-100

The full military designation for the TFE109 turbofan.

Applications

• Fairchild T-46
• Promavia Jet Squalus

Specifications

General characteristics

• Type: Turbofan
• Length: 942 mm (37.1 in)
• Diameter: 523 mm (20.6 in)
• Dry weight: 182 kg (400 lb)

Components

• Compressor: Dual high pressure centrifugal, driven off high pressure turbine.
• Combustors: Annular
• Fuel type: JET A

Performance

• Maximum thrust: (Max takeoff) 5.92 kN (1,330 lb st), (max continuous at 9,145 M/30,000 ft at Mach 0.5) 1.78 kN (400 lb st)
• Specific fuel consumption: (At max takeoff) 11.10 mg/Ns (0.392 lb/hr/lb st)
• Thrust-to-weight ratio: 3.33 (max takeoff), 1 (max continuous at 30,000 feet (9,100 m) at Mach 0.5)

See also

Related development

• Garrett TPE331
• LHTEC T800

Comparable engines

• Williams FJ33
• Williams FJ44

Related lists

• List of aircraft engines

References

• Gunston, Bill (2006). World Encyclopedia of Aero Engines, 5th Edition. Phoenix Mill, Gloucestershire, England, UK: Sutton Publishing Limited. ISBN 0-7509-4479-X.
• Gunston, Bill (1988). Jane's All the World's Aircraft 1988-89, 79th Edition. Jane's Information Group, Coulsdon, Surrey, England, UK: Jane's Information Group Limited ISBN 0-7106-0867-5

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- [en] Garrett F109

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[fr] Garrett F109

Le Garrett F109 (désignation de la compagnie TFE109) était un petit turbofan, développé pour l'avion d'entraînement Fairchild T-46 par la société américaine Garrett AiResearch. Après l'abandon du programme T-46 en 1986 (après la production de seulement trois exemplaires de l'avion), le développement ultérieur du moteur fut également stoppé, ainsi que celui de sa version civile TFE109.

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