Vultee V-70 / V-84 / XP-54
The XP-54, Vultee Model 70, was designed as a fast interceptor using the Pratt & Whitney X-1800-4AG engine. When the engine program was canceled, the aircraft was redesigned for the Lycoming XH-2470 and redesignated Vultee Model 84. The first of two XP-54s built (S/N 41-1210) made its initial flight on 15 January 1943 and flew 86 times before it was grounded by engine problems. The second aircraft (S/N 41-108994) flew only once.
The XP-54 nose section had a very unusual design feature. It tilted slightly upwards when firing its 37mm cannon to increase the firing range while the .50-cal. machine guns were tilted down at the same time.
Span: 53 ft. 10 in.
Length: 54 ft. 9 in.
Height: 13 ft. 0 in.
Weight: 15,262 lbs. empty/18,233 lbs. gross
Armament: Two 37mm cannon and two .50-cal. machine guns
Engine: Lycoming XH-2470 of 2,200 hp.
Maximum speed: 381 mph. at 28,500 ft.
Service ceiling: 37,000 ft.
Range: 500 miles