Used by both the Army and Navy, this water-cooled engine powered practically all American and Canadian training airplanes during World War. When cancellation of production contracts after the Armistice resulted in a huge surplus of OX-5 engines, they were offered for sale at a fraction of their original cost. Many were sold for well under $300. Although it was not a reliable engine, the OX-5's low cost and availability made it popular with many aircraft builders in the early 1920s.
On Loan from the War Department, Air Service, Washington, D.C.
Weight (dry): 145 kg (320 lb)