The Air Zoo's HUP-3 was built in 1953 as an H-25A. By 1958, the US Navy redesignated it as HUP-3. In the 1970s, the helicopter entered the National Naval Aviation Museum’s collection. They loaned it to the Air Zoo in 1992.
Piasecki HUP-3
Retriever
The Piasecki HUP Retriever or H-25 Army Mule, later UH-25, is a compact single radial engine, twin overlapping tandem rotor utility helicopter developed by the Piasecki Helicopter Corporation of Morton, Pennsylvania. Designed to a US Navy specification, the helicopter was produced from 1949 to 1954, and was also used by the United States Army and foreign navies.