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Riddle Airlines Inc

Operator of a large fleet of Curtiss C-46 twin-engine transports, Riddle produced a modification kit in the mid-1950s which added 40mph (64kmh) to cruising speed and 2,204 lb (1,000 kg) to the payload. The improved model was designated C-46R, and Riddle subsequently converted its own fleet of 32 to have 2,100 hp Pratt & Whitney engines.



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