Sikorsky S-72
| S-72 RSRA | |
|---|---|
| The S-72 in flight with a main rotor | |
| General information | |
| Type | Experimental compound helicopter |
| Manufacturer | Sikorsky Aircraft |
| Number built | 2 |
| History | |
| First flight | 12 October 1976 |
The Sikorsky S-72 was an experimental Sikorsky Aircraft compound helicopter developed as the Rotor Systems Research Aircraft (RSRA) for the National Aeronautics and Space Administration (NASA) and the United States Army. The RSRA was a testbed for rotor and propulsion systems for high-speed.