Twin piston engined, 5 bladed rotor, heavy-lift helicopter for USMC & US Army. 
The S-56 first flew on 18 Dec 1953.
Specifications | |
Derivatives & Versions | |
| Model | Year | History |
| XHR2S-1 | 1953 | |
| H-37A Mojave | 1955 | Military transport variant for US Army. Redesignated CH-37A/B in 1962 |
| HR2S-1 | 1955 | Production model for USMC. Redesignated CH-37C in 1962 |
| HR2S-1W | 1956 | Airborne early warning (AEW) helicopter for the US Navy fitted with AN/APS-20E radar. Two built. |
List of Operators of Sikorsky S-56 H-37 | |
| From | Organisation with model S-56 H-37 | ||
| 1956 |
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| 1978 |
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| Construction Numbers on database of S-56 H-37 or its versions | ||||||||||||
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