In 1934 the Air Ministry announced that it was looking for a new fighter plane. Mitchell, whose company was now part of Vickers Aviation, decided to adapt his Supermarine seaplane, in an attempt to meet the requirements of the Royal Air Force.

The new all-metal single-seat fighter plane, the Supermarine Spitfire Mk. I, had several technical features of the earlier racing seaplane. It had the same structure and aerodynamic lines. However, it had a new engine, the 1,030 hp Rolls Royce Merlin and carried 8 machine-guns.

The first Spitfire prototype appeared on 5th March, 1936 and flew at 350 mph (563 km/h) and could ascend at approximately 2,500 ft (762 m) per minute. With its slender aerodynamic lines and elliptical-plan wings, it was claimed at the time, to be the smallest and cleanest aircraft that could be constructed around a man and an engine.

The Royal Air Force was impressed with its performance and in June, 1936, it ordered 310 aircraft. The Supermarine Spitfire Mk. I went into production in 1937 and was operational in June, 1938. Vickers Aviation could not keep up with demand and most of Britain’s manufacturers began building Spitfires. By October, 1939, the Air Ministry had ordered over 4,000 of these airplanes.

Supermarine Spitfire Mk. II went into service in late 1940. These had a 1,150 hp Rolls Royce Merlin engine. Other versions appeared throughout the Second World War. This included Spitfire Mk. IV that was a photographic reconnaissance aircraft. The Spitfire Mk. VC was the first model to be used as a fighter-bomber and carried 500 pounds (226 kg) of bombs.

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