Sikorsky S-56 / H-37 Mojave Family
The Sikorsky S-56 was a large twin-engine assault and heavy-lift helicopter family that pushed piston-powered rotorcraft into transport loads approaching those of a fixed-wing aircraft. First flown in 1953, its HR2S and H-37 variants used a five-blade rotor, retractable landing gear, a cargo winch, and a spacious cabin for utility transport, external loads, rescue, and airborne early-warning experiments.
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Identity
- Aliases
- S-56XHR2S-1HR2S-1H-37 MojaveCH-37 MojaveH-37AH-37B
- Family Name
- Sikorsky S-56
- Full Name
- Sikorsky S-56 / H-37 Mojave Family
- Roles
- utilitycargosearch_and_rescuemilitary
- Status
- active
- Type
- aircraft
Details
- Aircraft Specs
- Configuration
- rotorcraft
- Operating Modes
- land
- Takeoff Landing Capabilities
- vtol
- Description
- The Sikorsky S-56 was a large twin-engine assault and heavy-lift helicopter family that pushed piston-powered rotorcraft into transport loads approaching those of a fixed-wing aircraft. First flown in 1953, its HR2S and H-37 variants used a five-blade rotor, retractable landing gear, a cargo winch, and a spacious cabin for utility transport, external loads, rescue, and airborne early-warning experiments.
- First Flight Year
- 1,953
- Manufacturer
- Propulsion Configurations
- Entries
- Count
- 2
- Placement
- nacelle
- Propulsion System
- Role
- main
- Variant Notes
- R-2800-54 production fit; earlier R-2800-50 fit also documented. Canonical node is the R-2800 family.
- Name
- S-56 R-2800 family installation
- Notes
- Sikorsky Archives specifies two Pratt & Whitney R-2800-54 engines in nacelles on the S-56, with earlier R-2800-50 production fit documented; the family-level canonical node preserves that boundary without inventing dash variants or the separate XT-38 concept.
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- Creation Time
- July 31, 2026 at 07:36:21 UTC
- Updated Time
- August 14, 2026 at 16:19:29 UTC