The Wright J-5 Whirlwind is a notable aircraft engine developed in the 1920s by the Wright Aeronautical Corporation. It is a five-cylinder, air-cooled radial engine known for its reliability and performance. The J-5 was widely used in various aircraft during the early years of aviation, contributing to the growth of commercial and military flight. This engine produced around 220 horsepower and was instrumental in powering several famous aircraft, including the Ford Trimotor and the P-26 Peashooter. Its design and engineering set a standard for future radial engines, making it a significant milestone in aviation history.