The Mikulin AI-30 is a Soviet-era aircraft engine designed in the late 1940s. It is a turbojet engine known for its use in various military aircraft, including the Mikoyan-Gurevich MiG-15. The AI-30 was notable for its relatively high thrust-to-weight ratio, which contributed to the performance of the aircraft it powered. This engine features a single-spool design and was one of the first turbojets produced in the Soviet Union. Its development marked a significant step in the advancement of jet propulsion technology during the early Cold War period, influencing future engine designs in the region.