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Jersey, 2008 Five Pounds RAF "SIR FRANK WHITTLE" Silver Proof in Capsule FDC

£39.00

Jersey, 2008 Five Pounds RAF "SIR FRANK WHITTLE" Silver Proof.

Born in 1907, Frank Whittle qualified as a pilot officer in 1928. While a cadet he produced a thesis on high speed, high altitude flight, proposing the use of a motor-jet, using a conventional piston engine to provide compressed air to a combustion chamber, whose exhaust was used directly for thrust. Whittle pursued the idea, but decided it was impractical . Then he thought, "Why not substitute a turbine for the piston engine" In 1929 he sent the idea to Air Ministry who rejected it. Whittle continued working on it, however, and in 1935 formed Power Jets Ltd. He had to wait until 1940 for Air Ministry backing. By April 1941 the engine was ready and on May 15, 1941 the W.1- powered E.28/39 took off from Cranwell, reaching a maximum speed of around 545 km/h (340 mph). 600 km/h), faster than the latest Spitfires.

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Stock no 76604

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