| S-75 ACAP | |
|---|---|
 Sikorsky S-75 ACAP all-composite test aircraft | |
| General information | |
| Type | Experimental helicopter |
| Manufacturer | Sikorsky Aircraft |
| Primary user | United States Army |
| Number built | 2 |
| History | |
| First flight | 27 July 1984 |
| Developed from | Sikorsky S-76 |
The Sikorsky S-75 was a proof-of-concept all-composite helicopter. Sikorsky Aircraft used all-composite materials to replace metal to provide greater strength, lighter weight, lower manufacturing costs, and reduce maintenance costs.