The Mikulin M-34 is a Soviet aircraft engine designed in the 1930s. It is a liquid-cooled V-12 engine, known for its reliability and performance in various aircraft during its time. The M-34 produced around 1,000 horsepower and was primarily used in military planes, contributing to the Soviet aviation industry during World War II. This engine was notable for its role in several aircraft, including the Tupolev TB-3 and the Ilyushin Il-4. Its design and engineering helped establish the foundation for future developments in Soviet aviation technology, making it a significant part of aviation history.