Allison V-1710
The Allison V-1710 was an American V12 aircraft engine designed and produced by the Allison Engine Company. Liquid-cooled, it was the most common US-developed engine of its type in service during World War II. Versions equipped with turbo-superchargers gave excellent performance at high altitude in the twin-engined Lockheed P-38 Lightning, and turbo-superchargers were also fitted to experimental single-engined fighters with similar results.