Russia's MiG-25s Flew So Fast They Destroyed Their Own Engines
In contrast with its older cousin, the MiG-21, a very limited number of Foxbats remain in service. Most of these fly in the Algerian Air Force and the Syrian Arab Air Force, although some reports have emerged of a MiG-25 returning to service in Libya. Most Foxbats retired shortly after the end of the Soviet Union, with a few serving for a time in successor state air forces. Iraqi MiG-25s were largely destroyed in the Gulf War, with the survivors eliminated in Operation Desert Storm.
In the late 1960s, the USSR debuted what appeared to be the world’s deadliest fighter. The MiG-25 (NATO term “Foxbat”) could outrun any fighter in the air, and indeed any military aircraft other than the SR-71 Blackbird.
Bearing a wicked name, a forbidding profile, and some great stats, the Foxbat looked like a world-beater. Combining exceedingly high speed with high altitude tolerance and a heavy weapons load, it looked as if the plane could contribute effectively on the Central Front while also helping to immunize Soviet airspace from U.S. penetration. Combined with the lessons of third-generation fighters in Vietnam, the existence of the Foxbat helped spur U.S. innovation, pushing the development of the F-15 Eagle.
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But the Foxbat never lived up to its billing. Deficiencies in design, manufacturing problems, and the disappearance of key aspects of its mission meant that it could not seriously compete on quality with the best fighters of the age, or on costs with models such as the MiG-21. Despite its stunning performance, the Foxbat has now nearly disappeared from the inventories of the world’s air forces.
The Foxbat sought to answer the Soviet Union’s need to protect its airspace from fast, high-flying U.S. bombers. The most prominent example was the B-58 Hustler, a Mach-2-capable nuclear bomber that entered service in 1960, but on the horizon loomed the B-70 Valkyrie, a futuristic bomber capable of penetrating Soviet airspace at speeds in excess of Mach 3. Armed with long-range missiles, a large radar and powerful engines, the Soviets designed the Foxbat to catch and kill these fast bombers.
The Foxbat entered service in 1970 (the same year the Hustler left service, and eight years after the cancellation of the B-70), with the last aircraft rolling off the production line in 1984. In all, the Soviet Union produced 1,186 Foxbats for foreign and domestic needs, with the overwhelming majority serving in the USSR. The USSR never licensed the Foxbat for foreign production, and the Chinese never cared enough about the aircraft to make a concerted effort to copy it.
Of course, the threat posed by Soviet SAM systems would eventually drive U.S. bombers from high altitude to low altitude, reinvigorating the B-52 Stratofortress and transforming the air defense game. Lacking a look down/shoot down radar (the Soviets wouldn’t develop this capability until the 1980s), the MiG-25 would have struggled to carry out its interception role against such tactics. In reality, most of the Foxbat’s Soviet service would come in pursuit of high-flying recon planes, such as the SR-71.
The MiG-25s capabilities were, and are, eye-popping. It can make Mach 2.83 in sustained flight, and can go over Mach 3 in bursts if no one cares about the destruction of the engines. In interceptor and air-superiority mode, it carries four R-40 air-to-air missiles, with an outer range limit of fifty miles. It can reach an altitude of over sixty-five thousand feet. Foxbats designed for reconnaissance missions carried sophisticated electronic and photographic equipment, and could reach even higher ceilings. A few Foxbats were optimized for high-speed strike roles.
These capabilities terrified Western analysts, who lacked good information on how the Foxbat flew in combat situations. The appearance of the MiG-25 (and its ability to set a variety of speed and altitude records) helped drive decisions in the U.S. tactical fighter program, eventually leading to the F-15 Eagle. After a defector landed a new MiG-25 in Japan in 1976, U.S. engineers developed a better sense of the plane’s characteristics.