Bell 309 KingCobra
| Bell 309 KingCobra | |
|---|---|
|   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) | 
| 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.