The Kuznetsov KN-22 is a Soviet afterburning turbofan engine that was designed by the Soviet Kuznetsov Design Bureau in the late 1960s. It was based on the NK-144 engine that powered the Tupolev Tu-144 supersonic airliner. The KN-22 was intended to power the Tupolev Tu-22M bomber, also known as the Backfire. The engine had a 12-stage axial compressor, an annular combustion chamber, and a five-stage turbine. The engine could produce a maximum thrust of 215.76 kN with full afterburner, but its cruise thrust was 158.9kN. This engine is technologically advanced and practically impossible to acquire through underground channels, being limited to the Soviet Air Force's experimental units.