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Mikoyan-Gurevich MiG-25

Mikoyan-Gurevich · Fighter / Attack · USSR · Cold War (1970–1991)

Mikoyan-Gurevich MiG-25 — Fighter / Attack
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The Mikoyan-Gurevich MiG-25 (NATO reporting name: Foxbat) was a Mach-3 Soviet interceptor and reconnaissance aircraft that, in the 1970s, was widely regarded by Western intelligence as the most dangerous fighter in service — a perception that proved partially mistaken once a defecting pilot delivered an aircraft to the West. The MiG-25 first flew in March 1964 and entered Soviet service in 1970, designed primarily to intercept the never-built American B-70 Valkyrie supersonic bomber and to challenge the SR-71 Blackbird's strategic-reconnaissance overflights along the Soviet periphery.

The MiG-25 used unusual construction: 80% nickel-steel alloy, 11% aluminium, and 9% titanium — the opposite ratio to the SR-71's titanium-dominant airframe. Steel was cheaper and easier for Soviet industry to work with, and tolerated kinetic heating up to Mach 2.83 in sustained cruise (briefly to Mach 3.2). The trade-off was extreme weight: empty weight of 20,000 kg and a maximum take-off weight of 36,720 kg made the MiG-25 the heaviest fighter in service at the time, with poor turning performance, short range, and engines that were essentially overstressed afterburning Tumansky R-15s. Genuine Mach-3 sustained cruise typically destroyed the engines.

On 6 September 1976, Soviet pilot Viktor Belenko defected to Japan in a MiG-25P, landing at Hakodate Airport with the aircraft largely intact. Western intelligence pulled the airframe apart for several months before returning it to the USSR, and discovered that the much-feared aircraft was actually an interceptor optimised for high-speed point defence rather than the agile dogfighter Western analysts had assumed. The Belenko intelligence haul drove the development of the F-15 Eagle's combat capability set and prompted urgent USAF investment in look-down/shoot-down radar.

Approximately 1,200 MiG-25s were built across all variants. The type saw combat over the Middle East with Soviet, Iraqi, Syrian, and Libyan operators; an Iraqi MiG-25 shot down a U.S. Navy F/A-18 in the 1991 Gulf War, the only American fighter loss to Iraqi air-to-air engagement. The MiG-25 was succeeded by the MiG-31 Foxhound from 1981 onwards. As of 2026, the MiG-25 is in limited reconnaissance service with Algeria and Syria; Russia retired its last operational airframes in 2013.

For Kids — a shorter, friendlier version

The MiG-25 Foxbat was a Soviet high-altitude high-altitude fighter designed to chase American spy planes and fast bombers. The MiG-25 was built mostly of steel (not aluminum) because of the extreme heat from flying at very high speeds. The MiG-25 first flew in 1964 and entered Soviet service in 1972.

The MiG-25 is huge — about 78 feet long, much longer than a school bus. Two Tumansky R-15 turbojets give it Mach 2.83 top speed (about 1,860 mph) — making the MiG-25 one of the fastest combat airplanes ever built. The MiG-25 could climb to 90,000 feet altitude.

About 1,186 MiG-25s were built between 1964 and 1984. Western intelligence panicked when the MiG-25 first appeared — they thought the Soviets had built a super fighter that could outturn the F-15. The truth came out in 1976 when Soviet pilot Viktor Belenko flew a MiG-25 to Japan and asked for asylum. Western engineers inspected the airplane: it was fast and high-flying, but big and clumsy at lower speeds, with crude electronics and steel construction.

The MiG-25's job was simple: climb fast, fly fast, shoot enemy bombers. It served many countries: Soviet Union, Algeria, India, Iraq, Libya, Syria. Some MiG-25s are still flying in Algeria. Russia retired its MiG-25s in 2013, replaced by the newer MiG-31 Foxhound (which uses similar tactics but better electronics).

Fun Facts

  • The MiG-25 Foxbat is one of the fastest combat airplanes ever built — Mach 2.83.
  • About 1,186 MiG-25s were built between 1964 and 1984.
  • The MiG-25 was built mostly of steel (not aluminum) because of heat from extreme speeds.
  • In 1976, Soviet pilot Viktor Belenko defected to Japan in a MiG-25, letting the West inspect it.
  • The MiG-25 could climb to 90,000 feet altitude.
  • Russia retired its MiG-25s in 2013, replaced by the MiG-31 Foxhound.
  • Western intelligence panicked when the MiG-25 first appeared — but it was less fearsome than expected.

Kids’ Questions

What happened with the Belenko MiG-25?

On September 6, 1976, Soviet pilot Viktor Belenko flew a MiG-25P from his airbase in the Soviet Far East to Hakodate Airport in Japan. He landed without permission, parked the airplane, jumped out, and asked Japanese authorities for political asylum (he wanted to defect to the West). The U.S. quickly arrived to inspect the MiG-25. American intelligence had been studying photos for years, fearing the MiG-25 was a super fighter. After inspecting Belenko's airplane, they discovered the truth — fast but crude. The MiG-25 had vacuum-tube electronics (not transistors), basic radar, and was uncomfortable for pilots. Belenko lived the rest of his life in America, where he died in 2023.

Why is the MiG-25 made of steel?

At Mach 2.83, the air pressing against the MiG-25's body heats up to about 300°C (570°F) — hot enough to melt aluminum (which is what most fighters are made of). The Soviets had two choices: spend years developing exotic heat-resistant metal alloys (like the SR-71's titanium), or just use steel (which handles heat fine but is much heavier). They chose steel because it was available, well-understood, and could be built quickly. The trade-off: the MiG-25 weighs more than aluminum fighters of similar size. That's why it has two big engines — to overcome the weight. The SR-71 used titanium for better performance, but at much higher cost.

Why is the MiG-25 made of steel?

At Mach 2.83, the air pressing against the MiG-25's body heats up to about 300°C — hot enough to melt aluminum. The Soviets had two choices: spend years developing exotic heat-resistant alloys (like the SR-71's titanium), or just use steel (which handles heat fine but is heavier). They chose steel — available, well-understood, quick to build. The trade-off: the MiG-25 weighs more than aluminum fighters. That's why it has two big engines. The SR-71 used titanium for better performance, but at much higher cost.

Variants

MiG-25P / MiG-25PD
Interceptor variants armed with R-40 air-to-air missiles. The MiG-25P was Belenko's defection aircraft; the PD added look-down/shoot-down radar after the West learned the original radar's limitations.
MiG-25R / MiG-25RB
Reconnaissance and reconnaissance-bomber variants. The RB added a tactical-bombing capability (~5,000 kg internal/external).
MiG-25BM
Suppression-of-enemy-air-defence variant carrying the Kh-58 anti-radiation missile.
MiG-25PU / MiG-25RU
Two-seat training variants with a stepped second cockpit forward of the standard cockpit.

Notable Operators

Soviet / Russian Air Force (1970–2013)
Primary operator. Concentrated in PVO Strany air-defence regiments along the Soviet periphery and in tactical-air reconnaissance regiments.
Iraqi Air Force
Operated up to 35 aircraft. Famously shot down a U.S. Navy F/A-18 on the first night of the 1991 Gulf War.
Syrian Air Arab Republic Air Force
Long-time operator; some airframes still flying in limited capacity as of 2026.

Frequently Asked Questions

How fast was the MiG-25?

The MiG-25 cruised at Mach 2.83 in sustained flight and could briefly reach Mach 3.2, though sustained Mach-3 typically destroyed the engines. Its maximum demonstrated speed in service was Mach 2.83, making it one of the fastest production fighters ever built.

Why did Belenko defect?

Soviet pilot Viktor Belenko defected to Japan on 6 September 1976, landing his MiG-25P at Hakodate Airport. He cited dissatisfaction with Soviet life and his treatment by his unit. Western intelligence dismantled the aircraft for analysis before returning it to the USSR, discovering many of its real capabilities and limitations in the process.

MiG-25 vs SR-71: how did they compare?

Both flew at Mach 3-class speeds, but the SR-71 was a sustained-cruise reconnaissance platform with much longer range and higher altitude, while the MiG-25 was a high-speed point-defence interceptor that could only briefly match SR-71 speeds. The MiG-25 never successfully engaged an SR-71 despite numerous attempts.

Is the MiG-25 still in service?

Russia retired its last MiG-25s in 2013, replacing them with the MiG-31. As of 2026, only Algeria and Syria operate small numbers of remaining airframes, primarily in the reconnaissance role.

How many MiG-25s were built?

Approximately 1,186 MiG-25s were built between 1964 and 1984 across all variants. The type was exported to Iraq, Syria, Algeria, Libya, India, and Bulgaria.

Sources

See Also