General Electric CF34

The General Electric CF34 is a civilian high-bypass turbofan developed by GE Aviation from its TF34 military engine, and it is used on a number of business and regional jets including the Bombardier CRJ series, the Embraer E-Jets and the Comac ARJ21 and C909, with some 7,500 engines in service. The original engine had a single stage fan driven by a four stage low pressure turbine, supercharging a 14-stage high pressure compressor driven by a two stage turbine, with an annular combustor. Later higher thrust versions use an advanced technology core with only ten high pressure compressor stages, and the latest -10A and -10E variants were derived from the CFM56 family with a very different high pressure spool. GE invested 200 million dollars in 1995 to develop the -8C derivative for the CRJ700, and the -10E produces 82 kilonewtons of static thrust.