| Bell 309 KingCobra | |
|---|---|
.jpg) A Bell 309 twin-engine variant | |
| General information | |
| Type | Attack helicopter prototype |
| Manufacturer | Bell Helicopter |
| Primary user | United States Army |
| Number built | 2 |
| History | |
| First flight | 10 September 1971 (Twin-engine) January 1972 (Single engine)[1] |
| Developed from | Bell AH-1 Cobra |
The Bell Model 309 KingCobra was an experimental attack helicopter developed by Bell Helicopter, based on the Bell AH-1 Cobra.
- ^ Attack Helicopter Evaluation, Model 309 KingCobra - Paul G. Stinger (Army Aviation Systems Test Activity Edwards Air Force Base, California; National Technical Information Service), July 1972