Rolls-Royce Merlin Engine

If ever it can be said that an engine steered the course of war, it would be the Rolls-Royce Merlin that would be mentioned as the one having done it. The Merlin was the heart of some of the most effective combat aircraft of World War II including the Supermarine Spitfire, de Havilland Mosquito, Hawker Hurricane, Avro Lancaster and, of course, the P51 Mustang.