Russia's MiG31 Foxhound Fighter jets Moscow's Old Mach 3 Monster The Mikoyan MiG31 Foxhound is a supersonic interceptor aircraft developed for use by the Soviet Air Forces. The aircraft was designed by the Mikoyan design bureau as a replacement for the earlier MiG25 Foxbat. The MiG31 is based on and shares design elements with the MiG25. The MiG31 has the distinction of being one of the fastest combat jets in the world. It continues to be operated by the Russian Air Force and the Kazakhstan Air Force following the end of the Cold War and the collapse of the Soviet Union in 1991. The Russian Defence Ministry expects the MiG31 to remain in service until 2030 or beyond.
A longrange supersonic interceptor aircraft, the MiG31 Foxhound, a twoseat aircraft developed principally for the Russian and Kazakhstan Air Forces, was derived from MiG25 Foxbat. The maiden flight of the MiG31 took place in September 1975. Mikoyan is the designer and manufacturer of the MiG31.
MiG31 can work efficiently in all weather conditions while fulfilling visual flight rules (VFR) and instrument flight rules (IFR), day and night. It is equipped with stateoftheart digital avionics. MiG31 was the first soviet fighter aircraft to have true lookdown and shootdown capability.
Approximately 500 MiG31 aircraft have been produced, out of which 370 were delivered to the Russian Air Force and 30 are in service with Kazakhstan Air Force. The remaining aircraft were upgraded to different variants under several upgrade programmes. Only some of the Russian MiG fleet have been upgraded to MiG31BM standards under the upgrade programme.
The MiG25 Foxbat was unable to fly at low altitudes. The installation of inefficient turbojet engines led to decrease in combat range at supersonic speeds and an increase in the speed gauge of the MiG25 resulted in the destruction of the aircraft’s engine.
In an effort to overcome the drawbacks of the MiG25 Foxbat, the MiG31 was developed to fly at low altitudes with required supersonic speeds. MiG31 is equipped with efficient lowbypassratio turbofan engines, which allow an increase in combat range.


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