Mikoyan MiG-31 From Wikipedia, the free encyclopedia

Type Interceptor Manufacturer Mikoyan Maiden flight 16 September 1975 Introduced 1982 Status Operational Primary users Russian Air Force Kazakhstan Air Force Number built 500 Developed from Mikoyan-Gurevich MiG-25

The Mikoyan MiG-31 (Russian: МиГ-31) (NATO reporting name "Foxhound") is a supersonic interceptor aircraft developed to replace the MiG-25 'Foxbat'. Designed by the Mikoyan design bureau, the MiG-31 was the most advanced interceptor fielded by the Soviet Union before its dissolution. Contents [hide]

* 1 Development * 2 Description o 2.1 Airframe and engines o 2.2 Electronics suite o 2.3 Armament * 3 Variants * 4 Operators * 5 Specifications (MiG-31) * 6 External links * 7 Related content

[edit] Development

The MiG-25 'Foxbat', despite Western panic about its tremendous speed, made substantial design sacrifices in capability for the sake of achieving high speed, altitude, and rate of climb. It lacked maneuverability at interception speeds, was difficult to fly at low altitudes, and its thirsty turbojet engines resulted in a very short combat range at supersonic speeds. The MiG-25's turbojet engines also had to be exchanged after a flight in which its maximum speed of Mach 3 had been achieved.[citation needed]

The MiG-25's radar was also powerful enough to burn through the electronic countermeasures (ECM) of enemy aircraft.[citation needed] The radar's power system operated on vacuum tubes, which may seem odd to Western observers, but their use was very practical for the Soviets and served them well, including reduced susceptibility to damage from the electromagnetic pulses generated by nuclear explosions. Nonetheless, the Foxbat proved to be more useful in the reconnaissance role than as an interceptor, and by the mid-1970s a replacement was being developed.

Development of the MiG-25's replacement began with the Ye-155MP (Russian: Е-155МП) prototype which first flew on 16 September 1975. Although it bore a superficial resemblance to a stretched MiG-25 (with a longer fuselage for the radar operator cockpit), it was in many respects a totally new design. Soviet manufacturing limitations forced the MiG-25 to use nickel steel for 80% of its structure. The Ye-155MP doubled the use of titanium to 16% and tripled the aluminum content to 33% to reduce structural mass. The new structure was also stronger, enabling supersonic load ratings to rise to 5, compared to the Foxbat's 4.5.[citation needed] More importantly, supersonic speed was now possible at low-level altitudes. Fuel capacity was also increased, and new, more efficient low-bypass-ratio turbofan engines were fitted.

The most important development was the introduction of an advanced radar capable of both look-up and look-down engagement (locating targets above and below the aircraft), as well as multiple target tracking. This finally gave the Soviets an interceptor capable of engaging the most likely Western intruders at long range. It also reflected a policy shift from reliance on ground-controlled interception (GCI) to greater autonomy for flight crews.

Like its MiG-25 predecessor, the MiG-31 was surrounded by early speculation and misinformation concerning its design and capabilities. The West learned of the new interceptor from Lieutenant Viktor Belenko, a pilot who defected to Japan in 1976 with his MiG-25P. Belenko described an upcoming "Super Foxbat" with two seats and a capability to intercept cruise missiles. According to his testimony, the new interceptor was to have air intakes similar to the MiG-23 'Flogger', which the MiG-31 in reality does not have, at least not in production variants. While undergoing testing, a MiG-31 was spotted by a reconnaissance satellite at the Zhukovsky flight test center near the town of Ramenskoye. The images were interpreted as a fixed-wing interceptor version of a swing-wing fighter codenamed the "Ram-K". The latter was eventually revealed to be the Sukhoi Su-27 'Flanker', a wholly unrelated design.

Series production of the MiG-31 began in 1979, with operational models entering Soviet Anti-Air Defense (PVO) service in 1982. It was first photographed by a Norwegian pilot over the Barents Sea in 1985.

The MiG-31 was sought after for a variety of long-range missions. Following the collapse of the USSR, however, the budget for spares and maintenance collapsed, leaving many squadrons unable to maintain their complex aircraft. By 1996, only 20% of remaining aircraft