The Mikulin AI-20 is a Soviet-era turbojet engine designed for use in various aircraft. It was developed in the 1950s by the Mikulin Design Bureau and is known for its reliability and performance. The engine features a single-shaft design and is capable of producing significant thrust, making it suitable for both military and civilian applications. This engine was primarily used in aircraft such as the Tupolev Tu-104 and the Tupolev Tu-16. Its design contributed to the advancement of jet propulsion technology in the Soviet Union, influencing future engine developments. The AI-20 remains a notable example of mid-20th-century aviation engineering.