Model Variants (Including Prototypes)
YCH-54A - Six Pre-Production Aircraft
CH-54A - Initial Production Model; fitted with 2 x T-73-P1 series turboshaft engines of 4,500 shaft horsepower; 54 examples produced.
CH-54B - Second Production Model; increased weight; based on the CH-54A; fitted with 2 x T-73-P700 turboshaft engines of 4,800 shaft horsepower; 29 examples produced.
S-64 "Skycrane" - Civilian Variant of the US Army CH-54 Tarhe; 3 examples produced.
S-64A - Evaluation Models for the US Army; 6 examples delivered.
S-64E - Civilian Version based on the CH-54A production model for the US Army; 7 examples produced.
S-64 "Aircrane" - Current Civilian Production Form.
S-64E - Upgraded CH-54A production models; single new-build example.
S-64F - UPgraded CH-54B production models; fitted with 2 x Pratt & Whitney JFTD12-5A series engines.