The Mikulin M-40 is a Soviet aircraft engine designed in the late 1930s. It is a liquid-cooled V12 engine, known for its reliability and power output, making it suitable for various military aircraft during World War II. The M-40 was capable of producing around 1,000 horsepower, which contributed to the performance of several fighter planes. This engine was primarily used in aircraft like the Tupolev Tu-2 and the Ilyushin Il-4. Its design emphasized durability and efficiency, allowing it to operate effectively in challenging conditions. The M-40 played a significant role in enhancing the capabilities of Soviet aviation during its time.