The Bell 207 Sioux Scout is a modified Bell 47 helicopter, developed by Bell Helicopter under contract from the United States Army, as a proof-of-concept demonstrator for the Bell D-255 helicopter gun
Bell 207 prototype during flight testing
The 207 prototype (N73927) in flight
Bell 207 Sioux Scout in the United States Army Aviation Museum
The Lockheed AH-56 Cheyenne is an attack helicopter developed by Lockheed for the United States Army. It rose from the Army's Advanced Aerial Fire Support System program to field the service's first d
AH-56 Cheyenne during testing
Prototype #7 on display at the U.S. Army Aviation Museum, Ft. Rucker, Alabama
View of AH-56 nose and canopy
Three-quarter view of AH-56 Cheyenne.