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3. Rolls-Royce Merlin
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Rising to power famous aircraft like the Spitfire and Hurricane, the Rolls-Royce Merlin engine was vital throughout World War II. Its innovative cooling system and clever two-stage supercharger allowed remarkable high-altitude performance. New benchmarks for aircraft engine design are set by Merlin's capacity to provide over 1,500 horsepower while preserving dependability under demanding conditions. One of the most successful piston engines ever built, its constant development during the war years brought forth many advancements including improved fuel economy and higher power output.
