General Electric TF34

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Lockheed S-3 Viking.jpg
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


Specifications (TF34-GE-100A)[edit]

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)


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


  • Bypass Ratio: 6.22:1 Related development Comparable engines Related lists


    1. ^ "Fact Sheet: A-10 THUNDERBOLT II". USAF. 2012-05-21. Archived from the original on 30 May 2012. Retrieved 27 May 2012.
    2. ^ Fulghum, David A.; Bill Sweetman (14 December 2009). "Stealth over Afghanistan". Aviation Week. McGraw-Hill: 26–27.

    External links[edit]