The XP-48 was designed as a small, lightweight fighter by Douglas Aircraft Company in 1939. The Model 312 was to be powered by a Ranger inverted-vee SGV-770 of 525 hp. The Army Air Corps canceled the contract before any aircraft were built because of doubt about the XP-48 performance.
TECHNICAL NOTES (as designed): Engine: Ranger SGV-770 inverted vee of 525 hp Armament: One .30-cal. and one .50-cal. machine gun Span: 32 ft. Length: 21 ft. 9 in. Height: 9 ft.