Piasecki H-25, HUP Retriever/Army Mule US Army Aviation Museum Ft. Rucker, Alabama, USA November 19, 2014
Piasecki changed its name to Vertol in 1956 and was bought by Boeing in 1960, becoming Boeing-Vertol. The US Army and the navies of France, Canada, and the US used the 339 units of this aircraft which were produced. It was introduced in 1949 and retired in 1964.