Sikorsky H-5
The Sikorsky S-51 is a further development of the Sikorsky R- 5th The S-51 is larger and intended for civilian purposes. The military model called H- 5 and R-5, HO3S -1, or Horse and was stationed on aircraft carriers.
Military user
- Canada 1921 Canada
- Iraq 1924 Iraq
- Japan Japan
- Netherlands The Netherlands
- Philippines Philippines
- South Africa 1961 South Africa
- Thailand Thailand
- Venezuela Venezuela
- United Kingdom United Kingdom
- United States United States
- United States Army
- United States Air Force
- United States Coast Guard
- United States Navy