General Electric TF34

TF34
A TF34 mounted on the starboard pylon of an S-3B Viking aboard USS Kitty Hawk (CV-63)
Type	Turbofan
National origin	United States
Manufacturer	General Electric
First run	1971
Major applications	A-10 Thunderbolt II S-3 Viking
Unit cost	TF34-GE-400: $1.95 million (in 2015)
Variants	General Electric CF34

The General Electric TF34 is a military turbofan engine used on the A-10 Thunderbolt II and S-3 Viking. Developed by GE Aircraft Engines during the late 1960s, the original engine comprises a single stage fan, driven by a 4-stage low pressure (LP) turbine, supercharging a 14-stage high pressure (HP) compressor, driven by a 2-stage HP turbine. An annular combustor is featured. The TF34-GE-400A is rated at 9,275 lbf (41.26 kN) static thrust.

The civilian variant, the CF34, is used on a number of business and regional jets.

A TF34 attached to an A-10 Thunderbolt II

Applications

• A-10 Thunderbolt^[1]
• S-3 Viking
• Sikorsky S-72
• Lockheed Martin RQ-170 Sentinel - possible, not confirmed.^[2]

Specifications (TF34-GE-100A)

General characteristics

• Type: twin-shaft, bypass turbofan engine
• Length: 100 in (2.54 m)
• Diameter: 48.5 in (1.23 m)
• Dry weight: 1,443 lb (654 kg)

Components

• Compressor: single-stage fan, 14 stage HP axial flow compressor
• Combustors: axial, annular
• Turbine: 4 stage LP, 2 stage HP

Performance

• Maximum thrust: 9,065 lbf (40.3 kN, 4.111 kgf)
• Turbine inlet temperature: 1,495 °F (812 °C)
• Fuel consumption: 3,363 lb/h (1.525 kg/h) at sea level, static conditions
• Specific fuel consumption: 0.371 lb/(h·lbf)
• Thrust-to-weight ratio: 6.35:1