General Electric CF34-8C is a turbofan model grouping covering the certified -8C5B1 and -8C5 variants. GE's propulsion datasheet lists 13,790 lbf maximum takeoff thrust for -8C5B1 and 14,500 lbf for -8C5, with a 5:1 bypass ratio; overall pressure ratio is 28:1 for -8C5B1 and 28.5:1 for -8C5. The family is applied to CRJ700/900/1000 and Challenger 870/890; exact dash variants and vehicle-family relationships remain separately modeled.