The Mikulin AM-11 is a Soviet aircraft engine developed in the late 1940s. It is a liquid-cooled, V-12 piston engine known for its reliability and power output, making it suitable for various military aircraft during its time. The engine was designed to enhance performance in fighter and bomber planes. This engine was primarily used in the Tupolev Tu-4, a Soviet copy of the American B-29 Superfortress. The AM-11 contributed to the aircraft's capabilities, allowing it to achieve significant speeds and altitudes, which were essential for strategic bombing missions during the early Cold War era.