What is tumansky r-15?

The Tumansky R-15 is a turbojet engine developed by the Soviet Union during the Cold War era. It was designed to power supersonic interceptor aircraft, and was used on a number of different models including the Mikoyan-Gurevich MiG-25 and MiG-31. The engine is capable of producing up to 25,000 pounds of thrust, and has a maximum speed of Mach 2.83. The R-15 is known for its reliability and durability, and is still in use today in some military aircraft.