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Folland Fo.108 / 43/37


After the foundation of Folland Aircraft Ltd a series of projects beginning with Fo.101 remained paper designs only, and the firm's first real aircraft was the Folland Fo.108, designed to meet Specification 43/37 for an engine testbed. Percival and General Aircraft also tendered, but Folland won the contract for a batch of 12.
A large, single-engined, low-wing monoplane with fixed landing gear, the Folland 43/37 accommodated a pilot and two observers in a large cabin with complete instrumentation for monitoring engine performance in flight. Construction was mixed, the semi-monocoque fuselage of light alloy while the wings and tail were plywood-covered. Split trailing-edge flaps and automatic wingtip slots were fitted.

The first was delivered in 1940, and the first recorded loss was on 28 April 1944 when the eighth aircraft crashed on take-off from Heston during Bristol Centaurus IV tests. Centaurus Is and IVs rapidly disposed of three more Folland 43/37s in only three weeks, the third, first and second aircraft being lost on 28 August and 14 and 18 September 1944 respectively. The sixth aircraft was also lost on 14 September while fitted with a Sabre I. The only other recorded fates are two struck off charge in 1945: the eleventh on 5 March after testing the Hercules XI and the fifth on 27 March after Rolls-Royce Griffon tests.

The testbed aircraft engine installations included differing versions of the Napier Sabre, Bristol Hercules and Centaurus, and Rolls-Royce Griffon. The fifth aircraft was used later by de Havilland for propeller tests.

Engine: 1 x Centaurus
Max take-off weight: 6800 kg / 14992 lb
Wingspan: 17.68 m / 58 ft 0 in
Length: 13.21 m / 43 ft 4 in
Height: 4.95 m / 16 ft 3 in
Wing area: 54.63 sq.m / 588.03 sq ft
Max. speed: 470 km/h / 292 mph
Cruise speed: 430 km/h / 267 mph


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