General Electric CF34
| CF34 | |
|---|---|
 |
|
| A CF34 installed on a Bombardier CRJ200 | |
| Type | Turbofan |
| National origin | United States |
| Manufacturer | General Electric |
| First run | 1982 |
| Major applications |
Bombardier Challenger 601/604/605 Bombardier Challenger 850 Bombardier CRJ Comac ARJ21 Embraer E-Jets |
| Unit cost | CF34-8C5: $4 million (2012) CF34-10E: $7.3 Million (2012) |
| Developed from | General Electric TF34 |
| Developed into | General Electric NG34 |
The General Electric CF34 is a civilian turbofan developed by GE Aircraft Engines from its TF34 military engine. The CF34 is used on a number of jet airliners, including the Bombardier CRJ series, the Embraer E-Jets, and the Chinese ARJ21 under development. As of 2012, there are over 5,600 engines in service.
The original engines comprise a single stage fan, driven by a 4-stage low pressure (LP) turbine, supercharging a 14-stage HP compressor, driven by a 2-stage high pressure (HP) turbine, with an annular combustor. Later higher thrust versions of the CF34 feature an advanced technology core, with only 10 HP compressor stages. Latest variants, the -10A and -10E, were derived from the CFM56 engine family, and 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 82 kilonewtons (18,500 lbf) for the -10E variant.
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