POWER PLANT: One Rolls-Royce Griffon liquid cooled engine, rated at 1,600 hp
PERFORMANCE: 470 mph at 15.000 ft
COMMENT: In 1941 a proposal was submitted to the Ministry of Aircraft Production for a high-speed single-seat fighter powered initially by a Rolls-Royce Merlin engine, and later – when in full production – by a more powerful Rolls-Royce Griffon engine. The aircraft was of wooden construction with the exception of the wing spars, which were of metal. Rather unusual it was fitted with a reverse tricycle undercarriage, the rear unit of which was provided with two positions, giving either a horizontal or a tail down attitude to the fuselage. The main undercarriage was folded inwards into the wings, giving a wide track. In order to reduce the frontal area, the windscreen and canopy were very low. To enable the pilot to have an adequate view for take-off and landing, he could raise his seat, the top of the canopy hinging up to form a windscreen. The wings were of elliptical planform, the root thickness rather high. The wing area was substantially less than on other existing fighter, resulting in a higher wing loading. The M.23 was not ordered, possibly because it was of wooden construction and possibly because the Ministry did not believe that, even with a Rolls-Royce Griffon engine, a speed of 470 mph would be attainable with a 20 percent thick wing (Ref.: Unicraft).
POWER PLANT: One Rolls-Royce R. 46 supercharged, liquid-cooled engine, rated at 2.500 to 4.000 hp
PERFORMANCE: 508 mph at 25.000 ft
COMMENT: In 1944, in response to F.13/44 specification of the Air Ministry Sydney Camm, chief designer of the Hawker Aircraft Company, started a design, the P.1027, for a slightly enlarged “Tempest” fighter powered by a Rolls-Royce R. 46 engine, which was projected to develop around 2.500 to 4.000 hp. The engine would have driven eight-blade contra-rotating propellers. The radiator was to be moved into a ventral bath under the rear fuselage and wing center section. This design was soon rejected in favour of the P.1030, which featured wing leading edge radiators and larger overall dimensions. Top speed was expected to be app. 508 mph with a rate of climb of 6.400 ft/min and a service ceiling of about 42.000 ft. Both projects were dropped in favour of more promising turbojet engine designs Camm and his team was working on (Hawker P.1048) (Ref.: Unicraft)
POWER PLANT: One Rolls-Royce Griffon inline engine, rated at 1,730 hp, and one Whittle W.1A turbojet engine, rated at 390 kp
PERORMANCE: No data available
COMMENT: In 1939 the British Air Ministry issued Specification F.18/37 for a heavily armed interceptor. Beside the Bristol Aircraft Company, Gloster Aircraft proposed a design that, a novelty at that time, was to be powered by a Rolls-Royce Griffon piston engine and additionally by the brand new Whittle W.1A turbo engine. At least Hawker Aircraft Company submitted the best design that later became the Hawker Tornado. So in 1940 development of the Gloster Boosted Fighter was cancelled.
POWER PLANT: Two Rolls-Royce Merlin III engines, rated at 1,030 hp each
PERFORMANCE: No data available
COMMENT: Prior to WWII, the major world powers knew they needed long-range fighters to escort their bombers deep into enemy territory. To this end, the British aircraft company Martin Baker submitted an innovative design for a tailless, twin-engine fighter armed with 12 heavy machine guns. Its rudder gone to help reduce drag, the plane would use the trailing ends of its engine nacelles for lateral control supplemented with ducted engine exhaust gases as well as propeller induced air stream. Although seriously evaluated by the RAF, the Martin Baker 12 Gun Fighter never made it past the design stage.
POWER PLANT: One Rolls Royce “Griffon II”, rated at 1,760 h.p., driving contra-rotating three-bladed propellers
PERFORMANCE: 335 m.p.h. at 17,000 ft
COMMENT: In 1942 the Air Ministry’s Specification F. 6/42 called for a highly maneuverable, single seat, low attack aircraft and the P.100 was one of several designs submitted by Boulton Paul. The P.100 was one of the most advanced and unorthodox projects the aircraft industry responded with at that time. It had a canard – pusher layout to give the pilot the best possible view. The project was never realized. Instead, for ground fighting roles the Hawker “Hurricane” and “Typhoon” as well as the Supermarine “Spitfire” were used.
POWER PLANT: One Rolls-Royce “Griffon II” engine, rated at 2,220 hp
PERFORMANCE: 315 m.p.h. at 17,000 ft
COMMENT: The Boulton Paul P.99 was one of several high-performance fighter projects of the Royal Air Force during WW II. The P. 99 was a twin-boom design, the Griffon engine was mounted in the rear driving two contra-rotating pusher propellers. This arrangement allowed the pilot an excellent visibility.
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