|J-7 / F-7 Airguard|
|An upgraded Chengdu F-7PG of the Pakistan Air Force|
|Manufacturer||Chengdu Aircraft Corporation/Guizhou Aircraft Industry Corporation|
|First flight||17 January 1966|
|Primary users||People's Liberation Army Air Force|
Pakistan Air Force
Bangladesh Air Force
Korean People's Air Force
|Developed from||Mikoyan-Gurevich MiG-21|
|Developed into||Guizhou JL-9|
CAC/PAC JF-17 Thunder
The Chengdu J-7 (Chinese: 歼-7; third generation export version F-7; NATO reporting name: Fishcan) is a People's Republic of China license-built version of the Soviet Mikoyan-Gurevich MiG-21. Though production ceased in 2013, it continues to serve, mostly as an interceptor, in several air forces, including the People's Liberation Army Air Force. The J-7 was extensively re-developed into the CAC/PAC JF-17 Thunder, which became a successor to the type.
Design and development
In the 1950s and early 1960s, the Soviet Union shared most of its conventional weapons technology with the People's Republic of China. The famous MiG-21, powered by a single engine and designed on a simple airframe, was inexpensive but fast, suiting the strategy of forming large groups of 'people's fighters' to overcome the technological advantages of Western aircraft. However, the Sino-Soviet split abruptly ended the initial cooperation, and from July 28 to September 1, 1960, the Soviet Union withdrew its advisers from China, resulting in the project being stopped in China.
Soviet Premier Nikita Khrushchev unexpectedly wrote to Mao Zedong in February, 1962, to inform Mao that the Soviet Union was willing to transfer MiG-21 technology to China, and he asked the Chinese to send their representatives to the Soviet Union as soon as possible to discuss the details. The Chinese viewed this offer as a Soviet gesture to make peace, and they were understandably suspicious, but they were nonetheless eager to take up the Soviet offer for an aircraft deal. A delegation headed by General Liu Yalou, the commander-in-chief of the People's Liberation Army Air Force (PLAAF) and himself a Soviet military academy graduate, was dispatched to Moscow immediately, and the Chinese delegation was given three days to visit the production facility of the MiG-21, which was previously off-limits to foreigners. The authorization for this visit was personally given by Nikita Khrushchev, and on March 30, 1962, the technology transfer deal was signed. However, given the political situation and the relationship between the two countries, the Chinese were not optimistic about gaining the technology, and thus they were prepared for reverse engineering.
Russian sources state that several complete examples of the MiG-21 were sent to China, flown by Soviet pilots, and China also received MiG-21Fs in kits, along with parts and technical documents. Just as the Chinese had expected, however, when the Soviets delivered the kits, parts and documents to Shenyang Aircraft Factory five months after the deal was signed, the Chinese discovered that the technical documents provided by the Soviets were incomplete and that some of the parts could not be used.
China set about to reverse-engineer the aircraft for local production, and in doing so, they succeeded in solving 249 major problems and reproducing eight major technical documents that were not provided by the Soviet Union. One of the major flaws was with the Hydraulics systems, which grounded up to 70% of aircraft in some squadrons until the systems were upgraded. Another major upgrade was modifications to the fuel storage to make the aircraft more stable. The MiG-21 carries most of its fuel in the forward fuselage, causing the center of gravity to shift and become unstable after about 45 minutes of operation. The J-7 has redesigned fuel tanks and significantly larger drop tanks in order to maintain a more stable center of gravity, and therefore better Longitudinal static stability. The cockpit was also revised to replace the Soviet ejection seat, which was found to be unacceptable. The forward opening canopy was replaced by a standard canopy hinged to the rear and jettisoned before the seat ejected. Otherwise, the re-engineering effort was largely successful, as the Chinese-built J-7 aircraft showed only minor differences in design and performance from the original Soviet MiG-21.
In March 1964, Shenyang Aircraft Factory began the first domestic production of the J-7 jet fighter, which they successfully accomplished the next year. However, the mass production of the J-7 aircraft was severely hindered by an unexpected social and economic problem—the Cultural Revolution—that resulted in poor initial quality and slow progress, which, in turn, resulted in full-scale production only coming about in the 1980s, by which time the original aircraft design was showing its age.
In 1987 the J-7E was released, having a greatly improved wing, among other improvements. It was roughly 45% more maneuverable, and its takeoff and landing performance was greatly increased. It was also equipped with a helmet mounted sight, as well as being the first MiG-21 to be equipped with HOTAS and a multipurpose display. Many of the electronic components were British in origin, such as the gun sight and the multi purpose display. The aircraft is capable of using PL-8/Python 3 missiles with both the helmet mounted sight or the radar fire control, but the two are not connected. The pilot may use only one system at a time.
In the mid 1980s Pakistan requested an aircraft with greater radar capabilities. Both the standard radar and the British Marconi radar were plagued by ground clutter, but China did not have any experience with air to ground radar at the time. In 1984 Pakistan provided assistance by having their American trained F-16 pilots provide training on proper operation of ground attack radar, which enabled the Chinese to develop the J-7M. In the late 1980s the J-7MP and J-7PG introduced significant upgrades to the radar system by converting to an Italian FAIR Grifo-7 radar. This more than tripled the effective range of the radar, as well as greatly increased the angle which the radar could detect target.
The J-7 only reached its Soviet-designed capabilities in the mid 1980s. However, the fighter is affordable and has been widely exported as the F-7, often with Western systems incorporated, like the ones sold to Pakistan. There are over 20 different export variants of the J-7, some of which are equipped to use European weaponry, such as French R.550 Magic missiles. The Discovery Channel's Wings Over The Red Star series claims that the Chinese intercepted several Soviet MiG-21s en route to North Vietnam (during the Vietnam War), but these aircraft did not perform in a manner consistent with their original specifications, suggesting that the Chinese actually intercepted down-rated aircraft that were intended for export, rather than fully capable production aircraft. For this reason, the Chinese had to re-engineer the intercepted MiG-21 airframes in order to achieve their original capabilities. China later developed the Shenyang J-8 based both on the expertise gained by the program, and by utilizing the incomplete technical information acquired from the Soviet Ye-152 developmental jet.
In May 2013, J-7 production has ceased after decades of manufacturing. The last 12 F-7BGIs were delivered to the Bangladesh Air Force.
Most actions carried out by the F-7 export model have been air-to-ground missions. In air-to-air missions, there have rarely been any encounters resulting in dogfights.
In early 2008, Nigeria procured 12 F-7NI fighters and three FT-7NI trainers to replace the existing stock of MiG-21 aircraft. The first batch of F-7s arrived in December 2009.
Sudanese F-7Bs were used in the Second Sudanese Civil War against ground targets.
During Zimbabwe's involvement in the DRC, six or seven F-7s were deployed to the Lubumbashi IAP and then to a similar installation near Mbuji-Mayi. From there, AFZ F-7s flew dozens of combat air patrols in the following months, attempting in vain to intercept transport aircraft used to bring supplies and troops from Rwanda and Burundi to the Congo. In late October 1998, F-7s of the No.5 Squadron were used in an offensive in east-central Congo. This began with a series of air strikes that first targeted airfields in Gbadolite, Dongo and Gmena, and then rebel and Rwandan communications and depots in the Kisangani area on November 21.
East and Southeast Asia
In the mid 1990s, the PLAAF began replacing its J-7Bs with the substantially redesigned J-7E variant. The wings of the J-7E have been changed to a unique "double delta" design offering improved aerodynamics and increased fuel capacity, and the J-7E also features a more powerful engine and improved avionics. The newest version of the J-7, the J-7G, entered service with the PLAAF in 2003.
The role of the J-7 in the People's Liberation Army is to provide local air defence and tactical air superiority. Large numbers are to be employed to deter enemy air operations.
F-7Ms were planned to use for interception. However, they are now out of service and stored as reserve aircraft as new superior fighters arrived.
Relations between Egypt and Libya deteriorated after Egypt signed a peace accord with Israel. Egyptian Air Force MiG-21s shot down Libyan MiG-23s, and F-7Bs were deployed to the Egyptian-Libyan border along with MiG-21s to fend off possible further Libyan MiG-23 incursions into Egyptian airspace.
Although not in any known combat actions, it was in several movies portraying Iraqi MiG-21s during the Iran–Iraq War. One tells the story of an Islamic Republic of Iran Air Force strike on the Iraqi nuclear reactor at Osirak on September 30, 1980. Another "Attack on H3" tells the story of the 810 km-deep raids into the Iraqi heartland against Iraqi Air Force airfields on April 4, 1981, and other movies depicting the air combat in 1981 that resulted in the downing of around 70 Iraqi aircraft. However, unconfirmed reports claimed that during the later stages of the war, these aircraft were used for air-to-ground attacks. On July 24, 2007 an Iranian F-7 crashed in northern eastern Iran. The plane crashed due to technical difficulties. On April 27, 2016, Another Chengdu F7 crashed near Esfahan city, both pilots ejected safely.
F-7Bs paid for by Egypt arrived too late for the aerial combat in the early part of the Iran–Iraq War, but later participated mainly in air-to-ground sorties.
The Bangladeshi Air Force, currently operates F-7MB Airguards, and F-7BG/Gs interceptors.
Pakistan is currently the largest non-Chinese F-7 operator, with ~120 F-7P and ~60 F-7PG. The Pakistan Air Force is to replace its entire fleet of F-7 with the JF-17 multirole fighter, all F-7P are planned to be retired and replaced with JF-17 Thunder aircraft by 2020.
- Sri Lanka
Sri Lanka Air Force used three F-7BS and for ground attack missions against the LTTE and three FT-7 trainer. Due to the lack of endurance and payload, SLAF some times uses their F-7s for pilot training purposes.
Early 2008 the air force received six more advanced F-7Gs, these will be primarily used as interceptors. All The F-7G's, F-7BS's and FT-7s are flown by the No 5 Jet Squadron.
Sri Lankan officials reported that on 9 September 2008, three Sri Lankan Air Force F-7s were scrambled after two rebel flown Zlín-143 were detected by ground radar, two were sent to bomb two rebel airstrips at Mullaitivu and Kilinochchi areas, the government claims the third intercepting one ZLin-143 resulting in one LTTE Zlín-143 shot down by the chasing F-7G using air-to-air missiles while the rebel flown light aircraft was returning to its base at Mullaitivu after a bombing run against Vavuniya base.
- Bangladesh Air Force: 12 × F-7BG interceptors and 4 × FT-7BG two-seater fighters delivered in 2007. Additional 16 advanced F-7 BGI fighters delivered in 2012. Earlier deliveries of 16 F-7MB and 8 FT-7MB trainer aircraft now retired from service.
- People's Liberation Army Air Force: 290 × J-7 plus 40× J-7 trainers remained in service (As of February 2012).
- People's Liberation Army Naval Air Force: 30× J-7D/E remained in service (As of February 2012).
- Egyptian Air Force: 74 × F-7 in service,
- Islamic Republic of Iran Air Force: 20 × F-7 in service.
- Myanmar Air Force: 62 aircraft were received by the year 1990 to 1999 .24× F-7M and 6× FT-7 trainers remained in service (As of February 2012).
- Namibian Air Force: 6 × F-7NM and 2 × FT-7NM in active service. A total of 12 F/FT-7NM aircraft were delivered between 2006-2008.
- Nigerian Air Force: 12 × F-7 and 2 × FT-7.
- North Korean Air Force: As of February 2012, 180 × F-7 remained in service. However, reports of dire levels of serviceability suggest an airworthiness rate of less than 50%.
- Pakistan Air Force: As of February 2017, 139 × F-7P/PG plus 7 × FT-7 remained in service.
- Sri Lankan Air Force: 9 × F-7/GS/BS and 1 × FT-7 trainer remained in service (As of February 2012).
- Sudanese Air Force: 20 × F-7 in service.
- Tanzanian Air Force: Originally having had 11 × F-7 in service, Tanzania replaced them with 12 new J-7's (single-seat) under the designation J-7G and 2 dual-seat aircraft designated F-7TN in 2011. Originally ordered in 2009, the deliveries were completed and the aircraft are now fully operational at the air bases in Dar es Salaam and Mwanza. The new aircraft are equipped with a KLJ-6E Falcon radar, thought to be developed from the Selex Galileo Grifo 7 radar. The J-7G's primary weapon is the Chinese PL-7A short-range infrared air-to-air missile.
- Air Force of Zimbabwe: 7 × F-7 in service.
- Albanian Air Force: Total 12 F-7A in service from 1969 through 2004, now retired.
- Iraqi Air Force: 80× F-7, all retired.
- United States Air Force (Foreign Technology Evaluation: MiG-21F-13)
- Crew: 1
- Length: 14.885 m (Overall) (48 ft 10 in)
- Wingspan: 8.32 m (27 ft 3½ in)
- Height: 4.11 m (13 ft 5½ in)
- Wing area: 24.88 m² (267.8 ft²)
- Aspect ratio: 2.8:1
- Empty weight: 5,292 kg (11,667 lb)
- Loaded weight: 7,540 kg (16,620 lb) (two PL-2 or PL-7 air-to-air missiles)
- Max. takeoff weight: 9,100 kg (20,062 lb)
- Powerplant: 1 × Liyang Wopen-13F afterburning turbojet
- Dry thrust: 44.1 kN (9,921 lbf)
- Thrust with afterburner: 64.7 kN (14,550 lbf)
- Maximum speed: Mach 2.0 (2,200 km/h (1,189 knots, 1,375 mph)) IAS
- Stall speed: 210 km/h (114 knots, 131 mph) IAS
- Combat radius: 850 km (459 nmi, 528 mi) (air superiority, two AAMs and three drop tanks)
- Ferry range: 2,200 km (1,187 nmi, 1,367 mi)
- Service ceiling: 17,500 m (57,420 ft)
- Rate of climb: 195 m/s (38,386 ft/min)
- Guns: 2× 30 mm Type 30-1 cannon, 60 rounds per gun
- Hardpoints: 5 in total – 4× under-wing, 1× centreline under-fuselage with a capacity of 2,000 kg maximum (up to 500 kg each)
- Rockets: 55 mm rocket pod (12 rounds), 90 mm rocket pod (7 rounds)
- Bombs: 50 kg to 500 kg unguided bombs
- FIAR Grifo-7 mk.II radar
Accidents and incidents
- On 24 November 2015, flying officer Marium Mukhtiar – the first female fighter pilot in the Pakistan Air Force (PAF), died when a twin-seat FT-7PG crashed at PAF Base M.M. Alam near Kundian in Punjab province on a training mission. Both pilots ejected, but she succumbed to injuries received on landing. She was occupying the rear seat for Instrument Flight Rules training.
- On 3 April 2018, a Myanmar Air Force F-7 went down in the town of Taungoo during a training exercise. The pilot, Maj. Arkar Win, ejected, but he succumbed to injuries received on landing.
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