General Electric TF34

The General Electric TF34 is an American military turbofan engine used on the A-10 Thunderbolt II and S-3 Viking.

Design and development

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 9,275lbf (41.26kN) static thrust.

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

Variants

TF34-GE-2

Initial variant for Lockheed S-3, entered production in August 1972.

TF34-GE-100

Variant for Fairchild A-10A, first flown in A-10 during May 1972. Production began in October 1974.

TF34-GE-400A

Improved version of GE-2 for Lockheed S-3.

Applications

Specifications (TF34-GE-400A)

Data from Jane's.

General characteristics

Type: Twin-shaft, high-bypass turbofan engine
Length: 100in (250cm)
Diameter: 52.2in (133cm)
Dry weight: 1,478lb (670kg)

Components

Compressor: Single-stage fan, 14 stage HP axial compressor
Combustors: Axial, annular
Turbine: 4 stage LP, 2 stage HP

Performance

Maximum thrust: 9,275lbf (41kN; 4,207kgf)
Thrust-to-weight ratio: 6.28