The MiG-31 started life as an advanced derivative of the famous MiG-25P interceptor, becoming the first Soviet fourth-generation combat aircraft. First flown in 1975, it differed from its progenitor primarily in having a crew of two (pilot and weapons systems operator), a highly capable passive phased-array radar - a world first - and new R-33 long-range missiles as its primary armament. The maximum speed was an impressive Mach 2.82, the cruising...