07/31/2011. A land-based version of the shipboard XF5F-1 was offered to the USAAC as the G-45 while the prototype naval fighter was still under construction. Ordered as the XP-50 on November 25, 1939, it was essentially similar to its shipboard counterpart, apart from having a lengthened nose to accommodate the nose-wheel member of a tricycle undercarriage.

Powered by two turbo-supercharged Wright R-1820-67/69 engines, it was intended to carry an armament of two 0.787 in (20 mm) cannon and two 0.50 in (12.7 mm) machineguns. The XP-50 flew for the first time on May 14, 1941, but the aircraft was destroyed after 20 hours of flight testing as a result of a turbo-supercharger explosion. Further development was abandoned in favor of the more advanced XP-65 (Model G-51), which, in the event, was also to be discontinued.

Span: 42 ft 0 in (12.80 m)
Length: 31 ft 11 in (9.73 m)
Height: 12 ft 0 in (3.66 m)
Wing area: 304 sq.ft (28.24 sq.m)
Empty weight: 8,307 lb (3,768 kg)
Max takeoff weight: 13,060 lb (5,924 kg)
Max speed: 424 mph (682 kmh) at 25,000 ft (7,620 m)
Climb: to 20,000 ft (6,100 m) 5 min
Range: 585 mls (941 km)