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

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.

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

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)

References

^ ^a ^b Garrett Turbine Engine Company (October 1984). "Our demonstrator engine for the LHX is running and sized right for the Army's requirement". Army: The Magazine of Landpower. Vol. 34, no. 10. p. 151. ISSN 0004-2455.

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