Piasecki HUP Retriever
The Piasecki HUP Retriever/H-25 Army Mule is a compact single radial engine, twin overlapping tandem rotor utility helicopter developed by the Piasecki Helicopter Corporation of Morton, Pennsylvania. Designed to a United States Navy specification, the helicopter was produced from 1949 to 1954, and was also used by the United States Army and foreign navies. The HUP/H-25 was the first helicopter to be produced with an autopilot and also the first to perform a loop.
| H-25/HUP Retriever | |
|---|---|
| A U.S. Navy HUP-2 from USS Franklin D. Roosevelt | |
| Role | Utility helicopter |
| Manufacturer | Piasecki Helicopter |
| First flight | March 1948 |
| Introduction | February 1949 |
| Retired | 1958 US Army January 1964 RCN 1964 USN 1965 French Navy |
| Primary users | United States Navy United States Army Royal Canadian Navy French Navy |
| Produced | 1949–1954 |
| Number built | 339 |
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