Designed by W G Carter to Specification F.9/37 calling for a twin-engined single-seater, this Gloster fighter was of all-metal stressed skin construction. It was intended to carry a fuselage-mounted armament of two 20mm Hispano cannon and four 7.7mm Browning machine guns.
Two prototypes were ordered, the first of these, powered by two 1050hp Bristol Taurus T-S(a) 14-cylinder radials, being flown on 3 April 1939. The aircraft attained a maximum speed of 579km/h at 4575m, but was badly damaged in a landing accident early in its flight test programme. When testing was resumed in April 1940, it had been re-engined with 900hp Taurus T-S(a) IIIs with the result that performance suffered, maximum attainable speed in level flight being reduced to 534km/h at 4630m. The second prototype, meanwhile, had been completed with 885hp Rolls-Royce Peregrine liquid-cooled engines, flying for the first time on 22 February 1940, and attaining a maximum speed of 531km/h during subsequent flight testing. Although the handling characteristics of Gloster's F.9/37 contender were considered highly satisfactory and performance with the original engines had proved spectacular, no production was ordered.
Engine: 2 x Bristol Taurus T-S(a), 1050hp
Max take-off weight: 5269 kg / 11616 lb
Empty weight: 4004 kg / 8827 lb
Wingspan: 15.24 m / 50 ft 0 in
Length: 11.27 m / 36 ft 12 in
Height: 3.53 m / 11 ft 7 in
Wing area: 35.85 sq.m / 385.89 sq ft
Max. speed: 579 km/h / 360 mph