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The main variant of the Spitfire Mk. IA was powered by the famous Rolls Royce V-12 Merlin II engine. This produced 1,230 h.p. and drove a two bladed wooden propeller, giving the early Spitfire a top level speed of about 360 m.p.h., and a best climb rate of 2,530 ft/min. By the time of the battle of Britain, a three-bladed constant speed propeller had been installed, which markedly improved climb and acceleration.

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16y ago

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