The Bell UH-1 is perhaps the best-known American helicopter in the world. Made famous by its use in Vietnam, versions of the “Huey” remain in both military and civil service today. Designated HU-1 by the Army and H-40 by the Air Force, the first Hueys flew in 1958. In 1962, the designations were changed to UH-1. By the mid-1960s, Hueys could be found in every branch of the U.S. military and were entering the civil and foreign military markets. The “F” model of the UH-1 was built for the Air Force specifically to provide support for the Titan and Minuteman missile sites. It featured a new engine and gearbox system that initially gave it a new designation of XH-48A. The UH-1F now on display is the first prototype of this version of the Huey. A total of 119 UH-1Fs were built between 1964 and 1967.
Diameter of Main Rotor
Air Force Flight Test Center, Edwards AFB, California, 1966
Pima Air & Space Museum