The initial version of the Curtiss P-40, designated by the manufacturer as the Hawk H-81, combined the established airframe of the earlier radial-powered H-75 (P-36) fighter with the Allison V-1710 liquid-cooled engine. The year was 1939, and the marriage was one of expediency. With the threat of war in Europe growing by the day, the US Army Air Corps brass wanted a modern fighter that would combine the sterling handling qualities of the P-36 with...
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