Utility transport version for the US Army. The aircraft was re-designated to CH-37A in 1962 as part of the overall rationalization of designations for US Armed Forces aircraft.
The aircraft included a manually folded main rotor and hydraulically folded tail rotor pylon.
Design authority: Sikorsky Aircraft Division, United Aircraft and Transport Corporation
Primary manufacturer: Sikorsky Aircraft Division, United Aircraft and Transport Corporation
Parent type: Sikorsky S-56/H-37
Aircraft status: No longer flying
VTOL type: Helicopter
Lift configuration: Single main rotor
Dedicated control device: Tail rotor
Crew required: 2
Crew seating: Side-by-side
Landing gear: Wheels (all retractable)
Total number of engines: 2