Piasecki HUP Retriever
HELICOPTER SERIES BY PIASECKI HELICOPTER, LATER VERTOL
Piasecki H-25 Army Mule; Piasecki HUP; H-25 Army Mule; HUP Retriever; Piasecki H-25/HUP; HUP-3; HUP-2; Piasecki HJP; H-25A Army Mule; Vertol H-25 Retriever; H-25/HUP Retriever; Piasecki HUP-1; HUP-1; Vertol HUP; Piasecki PV-14; Piasecki PV-18; Piasecki Retriever; Piasecki H-25; Piasecki HUP-3; Piasecki HUP-3 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.