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Reginald J. Mitchell was born in Talke, Staffordshire, on 20th May, 1895. After leaving school he worked as an apprentice at a locomotive works and attended night classes at technical college.
In 1916 Mitchell went to work at Supermarine Aviation Works in Southampton. He began designing seaplanes and by 1922 they began breaking speed records. Now chief designer at the company, his Supermarine S6B, won the Schneider Trophy on 13th September, 1931. During the contest the aircraft reached 340 mph (547 km/h).
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-seater 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 II 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. Reginald J. Mitchell died of cancer in Southampton on 11th June, 1937. He was the subject of the feature film First of the Few (1942).