General Electric TF34/CF34
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The General Electric TF34 is a military turbofan engine used on the A-10 Thunderbolt and S-3 Viking. Developed by GE's GE Aircraft Engines division during the late 1960s, the original engine comprises a single stage fan, driven by a 4-stage LP turbine, supercharging a 14-stage HP compressor, driven by a 2-stage HP turbine. An annular combustor is featured. The TF34-GE-400A is rated at 41.26KN (9275lbf) static thrust.
The civilian variant, the CF34, is used on a number of regional jets, including the Bombardier CRJ series and the 'E-Jets' from Embraer. Originally based on the TF34, later higher thrust versions of the CF34 feature an advanced technology core, with only 10 HP compressor stages. Latest variants, the -10A and -10E, have a radically different HP spool, comprising a 9 stage compressor driven by a single stage turbine. The LP spool has 3 core booster stages behind the fan. Static thrust is 18500lbf (i.e. -10E)
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