The Mikoyan-Gurevich MiG-25 () (NATO reporting name: Foxbat) is a supersonic interceptor and reconnaissance aircraft that was among the fastest military aircraft to enter service. Designed by the Soviet Union's Mikoyan-Gurevich bureau the first prototype flew in 1964 with entry into service in 1970. With a top speed of Mach 2.83+ (as high as Mach 3.2, but only risking significant damage and destruction of the engines), a powerful radar and four air-to-air missiles, the MiG-25 was the world's premier interceptor.
When first seen in reconnaissance photography, the large wing planform suggested an enormous and highly maneuverable fighter. This was during a period of time when U.S. design theories were also evolving towards higher maneuverability due to combat performance in the Vietnam War. The appearance of the MiG-25 sparked off serious concern in the west, and prompted dramatic increases in performance for the McDonnell Douglas F-15 Eagle in late 1960s. The capabilities of the MiG-25 were better understood in 1976 when Soviet pilot Viktor Belenko defected in a MiG-25 to the United States via Japan. The large wing turned out to be due to the aircraft's very heavy weight.
Production of the MiG-25 series ended in 1984 after completion of 1,190 aircraft. A symbol of the Cold War, the MiG-25 flew with a number of Soviet allies and former Soviet republics, remaining in limited service in Russia and several other nations. It remains the fastest combat aircraft ever produced.
The subsonic Boeing B-47 Stratojet and Boeing B-52 Stratofortress strategic bombers were followed by the Mach 2-capable Convair B-58 Hustler, with the even faster North American B-70 Valkyrie on the drawing board. A major upgrade in the PVO defence system was required, and at the start of 1958 a requirement was issued for manned interceptors capable of going 3,000 km/h and fly at heights up to 27 km (88,583 ft). Mikoyan and Sukhoi responded.
The Mikoyan-Gurevich OKB had been working on a series of interceptors during the second half of the 1950s: the I-1, I-3U, I-7U, I-75, Ye-150, Ye-150A, Ye-152, Ye-152A, Ye-152P, and Ye-152M. The Ye-150 was noteworthy because it was built specifically to test the Tumansky R-15 engine, two of which would later be used for the MiG-25. This led to Ye-152, alternatively known as Ye-166, which set several world records. The Ye-152M (converted from one of the two Ye-152 aircraft) was intended to be the definite heavy interceptor design. But before it was finished, the PVO had selected the Tupolev Tu-128. As the work on the MiG-25 was well under way, the single-engine Ye-152M was abandoned.
The design bureau studied several possible layouts for the new aircraft. One had the engines located side-by-side, as on the MiG-19. The second had a stepped arrangement with one engine amidships, with exhaust under the fuselage, and another in the aft fuselage. The third project had an engine arrangement similar to that of the English Electric Lightning, with two engines stacked vertically. Option two and three were both rejected because the size of the engines meant any of them would result in a very tall aircraft which would complicate maintenance.
The idea of placing the engines in underwing nacelles was also rejected because of the dangers of any thrust asymmetry during flight. Having decided on engine configuration there was thoughts on giving the machine variable-sweep wings and a second crew member, a navigator. Variable geometry would improve maneuverability at subsonic speed, but at the cost of decreased fuel tank capacity. Because the reconnaissance aircraft would operate at high speed and high altitude the idea was soon dropped. Another interesting but impractical idea was to improve the field performance using two RD36-35 lift-jets. Vertical takeoff and landing would allow for use of damaged runways during wartime and was studied on both sides of the Iron Curtain. The problem has always been that engines dedicated to vertical lift do not contribute with any power in horizontal flight, and occupy space in the airframe needed for fuel. The MiG interceptor would need all the fuel it could get so the idea went nowhere.
A variety of other roles were considered for the aircraft, including cruise missile carrier, and even a small five to seven-passenger supersonic transport, but none of these notions bore any fruit, and only the main directive of a high-altitude reconnaissance aircraft for the VVS' Frontal Aviation and heavy interceptor for PVO was ever realized.
The first prototype was a reconnaissance variant, designated "Ye-155-R1", and made its first flight on 6 March 1964. It had some characteristics that was unique to that prototype, and some of these were visually very evident: The wings had fixed wingtip tanks (600 litre capacity) to which small winglets were attached for stability purposes, but when it was found fuel sloshing around in the tanks caused vibrations they were eliminated. The aircraft also had attachments for movable foreplanes, canards, to help with pitch control at high speed (provisions for canards had previously been installed, but not used, on the Ye-152P.)
The first flight of the interceptor prototype, "Ye-155-P1", took place on 9 September 1964. Development of the MiG-25, which represented a major step forward in Soviet aerodynamics, engineering and metallurgy, took several more years to complete.
On July 9, 1967, the new aircraft was first shown to the public at Domodedovo air show.
In all 29 records were claimed, of which seven were all-time world records for time to height, altitudes of 20,000 m and higher, and speed. Several records still stand.
The MiG-25 was theoretically capable of a maximum speed of Mach 3+ and a ceiling of 90,000 ft (27,000 m). Its high speed was problematic: although sufficient thrust was available to reach Mach 3.2, a limit of Mach 2.8 had to be imposed as the turbines tended to overspeed and overheat at higher speeds, possibly damaging them beyond repair.
Full scale production of the MiG-25R ('Foxbat-B') began in 1969 at the Gorkii aircraft factory (Plant No.21). The MiG-25P ("Foxbat-A") followed in 1971, and 460 of this variant was built until production ended in 1982. The improved PD variant that replaced it was built from 1978 till 1984 with 104 aircraft completed. But from then on the Gorkii factory switched over production to the new MiG-31.
A non-combat trainer variant ("Foxbat-C") was also developed for each version, the MiG-25PU and MiG-25RU, respectively. The MiG-25R evolved several subsequent derivatives, including the MiG-25RB reconnaissance-bomber, the MiG-25RBS ("Foxbat-D") with side-looking airborne radar (SLAR), the MiG-25RBK ELINT aircraft, and the MiG-25BM ("Foxbat-F") SEAD variant, carrying four Raduga Kh-58 (NATO reporting name AS-11 'Kilter') anti-radiation missiles. The BM variant was introduced late into service, in 1988.
Inaccurate intelligence analysis caused the West initially to believe the MiG-25 was an agile air-combat fighter rather than an interceptor. In response, the United States started a new program which resulted in the McDonnell Douglas F-15 Eagle. NATO obtained a better understanding of the MiG-25's capabilities on 6 September 1976, when a Soviet Air Defence Forces pilot, Lt. Viktor Belenko, defected, landing his MiG-25P at Hakodate Airport in Japan.
The pilot overshot the runway on landing, damaging the landing gear and making the MiG-25 un-airworthy. It was carefully dismantled and analyzed by the Foreign Technology Division (now the National Air and Space Intelligence Center) of the United States Air Force, at the Wright-Patterson Air Force Base. After 67 days, the aircraft was returned to the Soviets in pieces. The analysis, based on technical manuals and ground tests of engines and avionics, revealed unusual technical information:
Plans for a new aircraft to develop the Foxbat's potential to go faster than the in-service limit of Mach 2.8 were designed as a flying prototype. Unofficially designated MiG-25M, it had new powerful engines R15BF2-300, improved radar, and missiles. This work never resulted in a machine for series production, as the coming MiG-31 showed more promise.
On 6 November 1971, an Egyptian MiG-25 flying at Mach 2.5 was met by Israeli F-4Es and fired upon unsuccessfully. A MiG-25 was tracked flying over Sinai at Mach 3.2 during this period. The MiG-25 overspeeded its engines, which led to their later destruction. Unit Det 63 was sent back home in 1972, though reconnaissance Foxbats were sent back to Egypt in 19–20 October 1973 during the Yom Kippur War. Unit Det 154 remained there until late 1974.
On 13 February 1981, Israeli Air Force sent two RF-4Es over Lebanon as a decoy for Syrian MiG-25 interceptors. As the MiGs scrambled, the RF-4Es turned back delivering chaffs and using ECM pods. Two IDF/AF F-15A were waiting for the MiGs and shot one of them down with AIM-7F missiles. The other MiG was able to escape. The trap was repeated on 29 July 1981 and 7 June 1982, when another two Syrian MiG-25s were downed by IDF/AF F-15As, one on each date. Finally, on 31 August 1983, a fourth Syrian MiG-25 was damaged by a Israeli Hawk SAM and then dispatched by an IDF/AF F-15. No Israeli aircraft were lost to the MiG-25.
In another incident, an Iraqi MiG-25PD, after eluding eight U.S. Air Force F-15s, fired three missiles at General Dynamics EF-111A Raven electronic warfare aircraft, forcing them to abort their mission and leave attacking aircraft without electronic jamming support.
In yet another incident, two MiG-25s approached a pair of F-15s, fired missiles (which were evaded by the F-15s), and then outran the American fighters. Two more F-15s joined the pursuit, and a total of 10 air-to-air missiles were fired at the MiG-25s, although none reached them. According to the same sources, at least one F-111 was also forced to abort its mission by a MiG-25 on the first 24 hours of hostilities, during an air raid over Tikrit.
Two MiG-25s were shot down by USAF F-15Cs during the Gulf War. After the war, in 1992, a U.S. F-16 downed a MiG-25 that violated the no-fly zone in southern Iraq.
On 23 December 2002, an Iraqi MiG-25 shot down a U.S. Air Force unmanned MQ-1 Predator drone, which was performing armed reconnaissance over Iraq. This was the first time in history that an aircraft and an unmanned drone had engaged in combat. Predators had been armed with AIM-92 Stinger air-to-air missiles, and were being used to "bait" Iraqi fighter aircraft, then run. In this incident, the Predator did not run, but instead fired one of the Stingers, which missed, while the MiG's missile did not.
No Iraqi aircraft were deployed in the U.S. invasion of Iraq in 2003, with most Iraqi aircraft being hidden or destroyed on the ground. In August 2003, several dozen Iraqi aircraft were discovered buried in the sand.
In May 1997, an Indian Air Force Mikoyan MiG-25RB Foxbat-B reconnaissance aircraft created a furor when the pilot flew faster than Mach 2 over Pakistani territory following a reconnaissance mission into Pakistan airspace. The MiG-25 broke the sound barrier while flying at an altitude of around 65,000 feet, otherwise the mission would have remained covert, at least to the general public. The Pakistan Government considered the breaking of the sound barrier was deliberate to make the point that the Pakistan Air Force (PAF) had no aircraft in its inventory which can come close to the MiG-25's cruising height (up to 74,000 feet). India denied the incident but Pakistan's Foreign Minister, Gohar Ayub Khan, believed that the Foxbat photographed strategic installations near the capital, Islamabad.
Lack of spare parts and India's acquiring of unmanned aerial vehicles and satellite imagery eventually led to its retirement in 2006. ;MiG-25PU "Foxbat-C": Two-seat trainer aircraft, with a new nose section fitted with two separate cockpits, lacks radar and has no combat capability. ;MiG-25RB "Foxbat-B": Single-seat reconnaissance-bomber aircraft, fitted with cameras and a Peleng automatic bombing system. The aircraft can carry a bombload of six 1,102 lb (500 kg) bombs or one nuclear weapon. ;MiG-25RBS "Foxbat-D": Single-seat reconnaissance-bomber aircraft, fitted with cameras and a side looking airborne radar (SLAR), equipped with a Sabla radio location system. ;MiG-25RBSh: MiG-25RBS "Foxbats" fitted with new equipment. ;MiG-25RBK: Single-seat Elint aircraft, fitted with a side looking airborne radar. ;MiG-25RBT: Single-seat Elint aircraft. ;MiG-25RBV: Single-seat reconnaissance-bomber aircraft, fitted improved equipment. ;MiG-25RU: Two-seat reconnaissance, trainer aircraft, it has no operational equipment. ;MiG-25BM "Foxbat-F": Single-seat defence-suppression aircraft, armed with Kh-58 or Kh-31 air-to-surface missiles. ;MiG-25PD "Foxbat-E": Single-seat all-weather interceptor fighter aircraft, fitted with a RP-25 look-down/shoot down radar, and an undernose IR search and track system, powered by two Tumansky R-15BD-300 turbojet engines, armed with two R-40 and four R-60 air-to-air missiles. ;MiG-25PDS: This designation was applied to all surviving MiG-25P "Foxbat A"s. The aircraft were subsequently upgraded in the early 1980s.
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;Bibliography
Category:Fighter aircraft of the Cold War Category:Gulf War aircraft Category:Interceptor aircraft MiG-025 Category:Soviet fighter aircraft 1960-1969 Category:Soviet military reconnaissance aircraft 1960-1969
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