The P-51 Mustang was initially designed for the British Royal Air Force for fighter reconnaissance and was the first single-engine aircraft based in England to penetrate Nazi Germany. North American built 15,575 P-51 Mustangs. Superior aerodynamics allowed them to outperform enemy fighters. The P-51D Mustang had a wingspan of 37 feet and was 32 feet long. Powered by one 1,490-horsepower Rolls-Royce V-1650-3 engine, it flew 437 mph with a range of 2,300 miles.