Mikoyan-Gurevich MiG-21
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| MiG-21 | |
|---|---|
 | |
| Romanian MiG-21UM Lancer B | |
| Role | Fighter |
| Manufacturer | Mikoyan-Gurevich OKB |
| Designed by | Artem Mikoyan |
| First flight | 14 February 1955 (Ye-2) |
| Introduced | 1959 (MiG-21F) |
| Retired | 1990s (Russia) |
| Status | In active service (see list) |
| Primary users | Soviet Air Force Polish Air Force Indian Air Force Romanian Air Force |
| Produced | 1959 (MiG-21F) to 1985 (MiG-21bis) |
| Number built | 11,496[1] (10,645 produced in the USSR, 194 in Czechoslovakia, 657 in India) |
| Variants | Chengdu J-7 |
Development
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Development of what would become the MiG-21 began in the early 1950s, when Mikoyan OKB finished a preliminary design study for a prototype designated Ye-1 in 1954. This project was very quickly reworked when it was determined that the planned engine was underpowered; the redesign led to the second prototype, the Ye-2. Both these and other early prototypes featured swept wings—the first prototype with delta wings as found on production variants was the Ye-4. The Ye-4 made its maiden flight on 16 June 1955 and made its first public appearance during the Soviet Aviation Day display at Moscow's Tushino airfield in July 1956. The MiG-21 was the first successful Soviet aircraft combining fighter and interceptor characteristics in a single aircraft. It was a lightweight fighter, achieving Mach 2 with a relatively low-powered afterburning turbojet, and is thus comparable to the American Lockheed F-104 Starfighter and Northrop F-5 Freedom Fighter and the French Dassault Mirage III.[1] Its basic layout was used for numerous other Soviet designs; delta-winged aircraft included Su-9 interceptor and the fast E-150 prototype from MiG bureau while the mass-produced successful front fighter Su-7 and Mikoyan`s I-75 experimental interceptor combined a similar fuselage shape with swept-back wings. However, the characteristic layout with the shock cone and front air intake did not see widespread use outside the USSR and finally proved to have limited development potential, mainly because of the very small space available for the radar.
Like many aircraft designed as interceptors, the MiG-21 had a short range. This was not helped by a design defect where the center of gravity shifted rearwards once two-thirds of the fuel had been used. This had the effect of making the plane uncontrollable, resulting in an endurance of only 45 minutes in clean condition. The issue of the short endurance and low fuel capacity of the MiG-21F, PF, PFM, S/SM and M/MF variants—though each had a somewhat greater fuel capacity than its predecessor—led to the development of the MT and SMT variants. These had a range increase of 250 km (155 mi) compared to the MiG-21SM, but at the cost of worsening all other performance figures (such as a lower service ceiling and slower time to altitude).[1]
The delta wing, while excellent for a fast-climbing interceptor, meant any form of turning combat led to a rapid loss of speed. However, the light loading of the aircraft could mean that a climb rate of 235 m/s (46,250 ft/min) was possible with a combat-loaded MiG-21bis,[1] not far short of the performance of the later F-16A. Given a skilled pilot and capable missiles, it could give a good account of itself against contemporary fighters. It was replaced by the newer variable-geometry MiG-23 and MiG-27 for ground support duties. However, not until the MiG-29 would the Soviet Union ultimately replace the MiG-21 as a maneuvering dogfighter to counter new American air superiority types.
The MiG-21 was exported widely and continues to be used. The aircraft's simple controls, engine, weapons, and avionics were typical of Soviet-era military designs. The use of a tail with the delta wing aids stability and control at the extremes of the flight envelope, enhancing safety for lower-skilled pilots; this in turn enhanced its marketability in exports to developing countries with limited training programs and restricted pilot pools. While technologically inferior to the more advanced fighters it often faced, low production and maintenance costs made it a favorite of nations buying Eastern Bloc military hardware. Several Russian, Israeli and Romanian firms have begun to offer upgrade packages to MiG-21 operators, designed to bring the aircraft up to a modern standard, with greatly upgraded avionics and armaments.
Due to the lack of available information, early details of the MiG-21 were often confused with those of the similar Sukhoi fighters also under development. Jane's All the World's Aircraft 1960–1961 describes the "Fishbed" as a Sukhoi design, and uses an illustration of the Su-9 'Fishpot'.
Production
- 5,765 in Gorky
- 83 MiG-21F; 513 MiG-21F-13; 525 MiG-21PF; 233 MiG-21PFL; 944 MiG-21PFS/PFM; 448 MiG-21R; 145 MiG-21S/SN; 349 MiG-21SM; 281 MiG-21SMT; 2013 MiG-21bis; 231 MiG-21MF
- 3,203 in Moscow
- MiG-21U (all export units); MiG-21PF (all export units); MiG-21FL (all units not built by HAL); MiG-21M (all); 15 MiG-21MT (all)
- 1,678 in Tbilisi
- 17 MiG-21 and MiG-21F; 181 MiG-21U izdeliye 66–400 and 66–600 (1962–1966); 347 MiG-21US (1966–1970); 1133 MiG-21UM (1971 to end)
Technical description
Wing
The MiG-21 has a delta wing. The sweep angle on the leading edge is 57° with a TsAGI S-12 airfoil. The angle of incidence is 0° while the dihedral angle is −2°. On the trailing edge there are ailerons with an area of 1.18 m², and flaps with an area of 1.87 m². In front of the ailerons there are small wing fences.Fuselage
A semi-monocoque with an elliptical profile with a maximum width of 1.24 m. The air flow to the engine is regulated by a cone in the air intake. Up until the MiG-21PF it is three staged. On speeds up to M=1.5 it is fully retracted, between speeds of M=1.5 and M=1.9 it is in the middle position, and with speeds higher than M=1.9 it is in the maximum forward position. However, on the MiG-21PF it adapts to the actual speed, according to the UVD-2M system aboard the aircraft, which monitors the pressure in front and behind the compressor of the engine. On both side of the nose there are gills to supply the engine with more air while on the ground and during takeoff. In the first variant of the MiG-21, the pitot tube is on the bottom of the nose; after the MiG-21P, every version of the −21 has this tube situated on the top of the air intake.The cabin is pressurized and air conditioned. The canopy up until the MiG-21PFM opens on a hinge on the front of the canopy. When ejecting, the SK-1 ejection seat connects with the canopy making a capsule to enclose the pilot and protect him from the airflow, after which it would separate and the pilot would parachute down. However, the canopy took too long to separate and some pilots were killed after ejecting at low altitudes. On the MiG-21PFM the canopy opens on a hinge on the right side of the cockpit.
hinge of the canopy
central air brake
lateral air brake
- Empennage
- Landing Gear
nose gear
main gear
Operational history
India
In 1961, the Indian Air Force (IAF) opted to purchase the MiG-21 over several other Western competitors because the Soviet Union offered India full transfer of technology and rights for local assembly.[3] In 1964, the MiG-21 became the first supersonic fighter jet to enter service with the IAF. Due to limited induction numbers and lack of pilot training, the IAF MiG-21 played a limited role in the Indo-Pakistani War of 1965.[4] However, the IAF gained valuable experience while operating the MiG-21 for defensive sorties during the war.[4] The positive feedback from IAF pilots during the 1965 war prompted India to place more orders for the fighter jet and also invest heavily in building the MiG-21's maintenance infrastructure and pilot training programs. By 1969, India had acquired more than 120 MiG-21s from the Soviet Union.[3]Safety record
The safety record of the IAF's MiG-21s has raised concern in the Indian Parliament and media, leading to the aircraft sometimes being referred to in the IAF as a "flying coffin".One source estimates that in the nine years from 1993 to 2002, the IAF lost over 100 pilots in 283 accidents.During its service life, the IAF has lost at least 116 aircraft to crashes (not including those lost in combat), with 81 of those occurring since 1990.Indo-Pakistani War of 1971
The expansion of IAF MiG-21 fleet marked a growing India-Soviet Union military partnership which enabled India to field a formidable air force to counter Chinese and Pakistani threats. The capabilities of the MiG-21 and the skills of its Indian pilots were soon put to the test during the Indo-Pakistani War of 1971. During the war, the MiG-21s played a crucial role in giving the IAF complete air superiority over vital points and areas in the western theater of the conflict.The 1971 war witnessed the first supersonic air combat in the subcontinent when an Indian MiG-21FLs shot down a PAF F-104 Starfighter with its GSh-23 twin-barrelled 23 mm cannon. By the time the hostilities came to an end, the IAF MiG-21s had shot down four PAF F-104s, two PAF F.6, one PAF North American F-86 Sabre and one PAF Lockheed C-130 Hercules. According to Western military analysts, the MiG-21s had clearly "won" the much anticipated air combat between the MiG-21 and the F-104 Starfighter
Because of the formidable performance of the MiG-21s, several nations, including Iraq, approached India for MiG-21 pilot training. By the early 1970s, more than 120 Iraqi pilots were being trained by the Indian Air Force.
Kargil War and Atlantique Incident
It was also used as late as 1999 in the Kargil War, in which one Indian Air Force MiG-21 was shot down by a Pakistani hand-held "Stinger" surface-to-air missile.[11] The MiG-21's last known kill took place in 1999 during the Atlantique Incident, when two MiG-21 aircraft of the Indian Air Force intercepted and shot down an Breguet Atlantique reconnaissance aircraft of the Pakistani Navy with the R-60MK (AA-8 Aphid) air-to-air missile.Specifications (Mikoyan-Gurevich MiG-21F-13)
(Specifications for other models can be found at:-Mikoyan-Gurevich MiG-21 variants)
- Crew: 1
- Length: 15.76 (with pitot tube) m (51 ft 8.47 in)
- Wingspan: 7.154 m (23 ft 5.66 in)
- Height: 4.1 m (13 ft 5.41 in)
- Wing area: 23.0 m² (247.3 ft²)
- Empty weight: 4,871 kg (10,738 lb)
- Gross weight: 7,100 kg (15,650 lb)
- Powerplant: 1 × Tumanskiy R11F-300, 37.27 kN (8,380 lbf) thrust dry, 56.27 kN (12,650 lbf) with afterburner each
- Maximum speed: 2,125 km/h (1,385 mph)
- Maximum speed: Mach 2.05
- Range: 1,580 km (981 miles)
- Service ceiling: 19,000 m (62,335 ft)
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