Shenyang J-11

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J-11
J-11BChel.jpg
Role Air superiority fighter
Manufacturer Shenyang Aircraft Corporation
First flight 1998
Introduction 1998
Status Active service
Primary user People's Liberation Army Air Force
Produced 1998–present
Number built 440 (as of 2019)[1]
Developed from Sukhoi Su-27
Developed into Shenyang J-16

The Shenyang J-11 (Chinese: 歼-11; NATO reporting name Flanker-B, -L[2]) is a twin-engine jet fighter of the People's Republic of China whose airframe is derived from the Soviet-designed Sukhoi Su-27. It is manufactured by the Shenyang Aircraft Corporation (SAC). The aircraft is operated by the People's Liberation Army Air Force (PLAAF) and the People's Liberation Army Naval Air Force (PLANAF).

Development[edit]

Proposed J-11[edit]

In the 1970s, the PLAAF initiated a project to develop a replacement for its MiG-19s. The Shenyang Aircraft Factory proposal, designated J-11, was a new light fighter powered by the British Rolls-Royce Spey 512 engine, with better maneuverability than the MiG-19 and better climb rate than the MiG-21. The project was abandoned due to difficulties in obtaining the engines.[3][better source needed]

Background: purchase of the Su-27[edit]

China is the first foreign operator of the Su-27 and the only country to acquire the fighter before the Fall of the Soviet Union. The deal, known as the '906 Project' in China,[4] marked the leap in Chinese aviation capability in the 1990s.[5] Discussion of the aircraft purchase began in 1988 when the Soviet Union offered China fourth-generation fighters like the MiG-29. However, the Chinese negotiator insisted on purchasing the Su-27, the most sophisticated fighter Soviets had at the time. The sales were approved in December 1990, with three fighters delivered to China before the disintegration of the Soviet Union in 1991.[5] Russia completed the Su-27 order and later allowed China to assemble and manufacture the Su-27 domestically. The domestically built ones were designated as the "J-11".[5]

The earliest batch of Su-27s were stationed at Wuhu air base in the early 1990s.[6] In the next two decades, 78 Flankers were delivered under three separate contracts by the Russian KnAAPO and IAPO plants. Delivery of the aircraft began in February 1991 and finished by September 2009. The first contract was for 20 Su-27SK and 4 Su-27UBK aircraft. In February 1991, an Su-27 performed a flight demonstration at Beijing's Nanyuan Airport. Chinese Su-27 pilots described its performance as "outstanding" in all aspects and flight envelopes. The official induction to service with the PLAAF occurred shortly thereafter. China found some of the delivered Su-27UBKs are "second-handed", consequently Russia delivered 2 more Su-27UBKs to China as a compensation.[4]

Differences in the payment method delayed the signing of the second, identical contract. For the first batch, 70% of the payment had been made in barter transactions with light industrial goods and food. Russian Federation argued that future transactions should be made in US dollars. In May 1995, Chinese Central Military Commission Vice Chairman Liu Huaqing visited Russia and agreed to the term, on the condition that the production line of Su-27 is imported. The contract was signed the same year. Delivery of the final aircraft from the second batch, which consists of 16 Su-27SKs and 8 Su-27UBKs occurred in July 1996. In preparation for the expanding Su-27 fleet, the PLAAF sought to augment its trainer fleet.[7]

On 3 December 1999, a third contract was signed, this time for 28 Su-27UBKs. All 76 of the aircraft featured strengthened airframe and landing gear – the result of the PLAAF demands air-ground capability. As a result, the aircraft is capable of employing most of the conventional Air-to-Ground ordnance produced by Russia. Maximum Take-Off Weight (MTOW) increased to 33,000 kg (73,000 lb). As is common for Russian export fighters, the active jamming device was downgraded; the Su-27's L005 ECM pod was replaced with the L203/L204 pod. Furthermore, there were slight avionics differences between the batches. The first batch had N001E radar, while the later aircraft had N001P radar, capable of engaging two targets at the same time. Additionally, ground radar and navigational systems were upgraded. The aircraft are not capable of deploying the R-77 "Adder" missile due to a downgraded fire control system,[7] except for the last batch of 28 Su-27UBKs.[4]

J-11[edit]

In 1996, China signed a contract for 200 Su-27s through Rosoboronexport under a coproduction scheme for total of US$2.7 billion, separate from the original Su-27 contract. By the agreement, Shenyang Aircraft Corporation (SAC) would assemble aircraft from kits manufactured by Komsomolsk-on-Amur Aircraft Plant (KnAPPO), and fit them with Russian subsystems (avionics, radars and engines) which would not be coproduced. Production began in 1997.[8] The first two were poorly assembled and required Russian assistance to rebuild. Five were built by 2000, and another 20 by 2003, by which time production was of high quality and incorporated local airframe parts; Russia did not object to local airframe parts, which allowed KnAPPO to reduce the contents of the kits supplied. By late 2004, KnAPPO delivered 105 kits, and 95 J-11s were delivered to the PLAAF.[9]

By 2015, J-11s were upgraded with Chinese-made missile approach warning systems (MAWS). Unconfirmed upgrades included improved cockpit displays, and fire control systems for R-77 or PL-10 missiles.[10]

Coproduction of the Su-27s reportedly ended in 2004 because China was developing the J-11B - a variant with domestic subsystems - in violation of the coproduction agreement.[9][11] At the time, Russia refused to comment on the manufacturing of J-15B.[12] At MAKS 2009, Rosoboronexport's General Manager Anatoli Isaykin said Russia and Sukhoi would "investigate the J-11B, as a Chinese copy of the Su-27".[12] At the 2009 Farnborough Airshow, Alexander Fomin, Deputy Director of Russia's Federal Service for Military-Technical Co-operation, reported that Russia had not asked China about the "copying" of military equipment and that China had licenses to manufacture the aircraft and its components, including an agreement on the production of intellectual property (IP) rights. He also confirmed the existence of an all-encompassing contract and an ongoing licensed production of the Su-27 variant by the Chinese.[13] This previously undisclosed IP agreement fuelled speculation about secret contracts or clauses in the original contract. The licence does not officially include carrier-capable aircraft (eg. Sukhoi Su-33) or variants (eg. Shenyang J-15).[14]

J-11B[edit]

The J-11B is a multirole variant of the J-11 incorporating Chinese subsystems. It was conceived as a way to remove the J-11's dependency on Russia.[9] SAC unveiled a J-11B mockup in mid-2002. Three prototypes were delivered to the PLAAF for testing in 2006.[15] The two-seater J-11BS followed two years after the J-11B.[9] By 2011, reportedly 90% of the J-11B was based on subsystems and parts designed in China, with the engine presumably being a major part of the remainder.[9][16] Many domestic subsystems are improvements of those found on the Su-27SK.[16]

Chinese subsystems on the J-11B include Type 1474 radar, 3-axis data system, power supply system, emergency power unit, brake system, hydraulic system, fuel system, environment control system, molecular sieve oxygen generation systems,[9] digital flight control system, and glass cockpit.[15] The airframe is slightly lighter due to greater use of composites.[17]

The J-11B may carry the PL-12[9] and PL-15 air-to-air missiles[18][better source needed]

Engine replacement[edit]

By 2004, the J-11 was being tested with the Shenyang WS-10.[19] Testing may have started as early as 2002; an image from the 2002 China International Aviation & Aerospace Exhibition allegedly depicted a J-11 with one engine replaced with a WS-10.[20] WS-10 development proved difficult. One regiment converted to WS-10-powered J-11Bs in 2007, but was grounded for an extended period due to poor operational reliability.[21] The WS-10A reportedly matured enough after 2009 to power the J-11B Block 02 aircraft,[22] and Jane's reported the J-11B as powered by the WS-10 in 2014.[23]

Operational history[edit]

In March 2011 a joint Sino-Pakistani exercise, Shaheen 1, was conducted at a Pakistan Air Force (PAF) base involving a contingent of Chinese aircraft and personnel from the PLAAF.[24] Information on which aircraft were used by each side in the exercise was not released, but photos of Pakistani pilots inspecting what appeared to be Chinese Shenyang J-11B fighters were released on the internet. The exercise lasted for around 4 weeks and was the first time the PLAAF had deployed to and conducted "operational" aerial maneuvers in Pakistan with the PAF.[25]

P-8 interception[edit]

Chinese Shenyang J-11B fighter intercepting an American P-8. The photo was taken by the crew of the P-8.
Underside view of the J-11BH, showing its air-to-air complement of two PL-8 and two PL-12 missiles.

On 19 August 2014 a J-11B intercepted a U.S. Navy P-8 Poseidon anti-submarine warfare aircraft that was over the South China Sea.[26]

The U.S. Department of Defense released details at a press conference on 22 August 2014 with Admiral John Kirby as spokesperson. According to Kirby, the incident occurred 135 miles (217 km) east of Hainan Island, in international airspace. The Chinese jet "crossed under the aircraft with one pass having only 50–100 feet [15–30 m] separation. The Chinese jet also passed the nose of the P-8 at 90 degrees with its belly toward the P-8 Poseidon, believed to be displaying its weapons load-out. Afterwards, the J-11 flew directly under and alongside the P-8, bringing their wingtips, as I said, to within 20 feet [6 m]. And then conducted a roll over the P-8, passing within 45 feet [14 m]." He said the "unprofessional" and "unsafe" actions of the Chinese pilot was "not keeping with the kind of military-to-military relationship" the U.S. sought to establish with China. An official complaint was sent to China through regular diplomatic channels.[27][28] The Pentagon commented further that: "Military activities may be conducted within the Exclusive Economic Zone of another nation as an exercise of the freedoms of navigation and overflight."[26]

In response, the Chinese Ministry of National Defense spokesman Yang Yujun said that the U.S. criticisms were "totally groundless" as the Chinese pilot professionally maintained a safe distance. Furthermore, he blamed the "massive and frequent close-in surveillance" by the U.S. as the root cause, and called for the end of surveillance flights to improve bilateral military ties.[29]

Variants[edit]

  • J-11A (or J-11[30] with NATO reporting name Flanker-B[31][32]) – Chinese/Russian assembled Su-27SK from Russian-made kits. 104 were built.[10]
  • J-11B (Flanker-L[2]) – Chinese-developed variant with domestic subsystems.[9] Block 02 powered by Shenyang WS-10 turbofan.[22][23]
  • J-11BS (Flanker-L+) – A twin-seat version of the J-11B.[10] In 2012, the number of J-11B and J-11BS in service was over 120.[33]
  • J-11BH (Flanker-L) – Naval version of the J-11B.[17][34] It was first sighted in May 2010.[17][35]
  • J-11BSH (Flanker-L+) – Naval version of the J-11BS.[17][34]
  • J-11BG – Upgraded variant with light-grey radome; speculated to be equipped with AESA radar.[36]
  • J-11D (Flanker-L[37]) – Variant possibly equipped with fixed electronically scanned array radar, IRST, and capability to fire heavier imaging/infrared (IIR) air-to-air missiles. The airframe makes greater use of composite materials, especially in the engine intakes for lower radar observability. The wings have three hardpoints each. Unconfirmed reports claim it has a new fly-by-wire control system, glass cockpit, improved EW systems, and an improved version of the WS-10A engine.[38]

Operators[edit]

 People's Republic of China

Specifications (J-11A/J-11)[edit]

Data from [41][42]

General characteristics

  • Crew: 1
  • Length: 21.9 m (71 ft 10 in)
  • Wingspan: 14.7 m (48 ft 3 in)
  • Height: 5.92 m (19 ft 5 in)
  • Wing area: 52.84 m2 (568.8 sq ft)
  • Empty weight: 16,380 kg (36,112 lb) [43]
  • Gross weight: 23,926 kg (52,748 lb)
  • Max takeoff weight: 33,000 kg (72,753 lb)
  • Fuel capacity: 9,400 kg (20,700 lb) internal fuel[44]
  • Powerplant: 2 × Shenyang WS-10A "Taihang" afterburning turbofans, 132 kN (30,000 lbf) thrust each (J-11B Block 02[22][23])

Performance

  • Maximum speed: Mach 2.35 (2,500 km/h, 1,553 mph) at altitude
  • Range: 3,530 km (2,190 mi, 1,910 nmi)
  • Combat range: 1,500 km (930 mi, 810 nmi) ~[45]
  • Service ceiling: 19,000 m (62,000 ft)
  • g limits: +9
  • Rate of climb: 300 m/s (59,000 ft/min) [46]

Armament

Avionics

  • Fire-control radar: NIIP Tikhomirov N001VE Myech coherent pulse Doppler radar, or Type 1474 radar (J-11B)[9]
  • OEPS-27 electro-optic system
  • NSts-27 helmet-mounted sight (HMS)
  • Gardeniya ECM pods

See also[edit]

Related development

Aircraft of comparable role, configuration, and era

Related lists

References[edit]

Citations
  1. ^ Bronk, Justin (October 2020). Russian and Chinese Combat Air Trends (PDF) (Report). Whitehall Report. Vol. 3–20. Royal United Services Institute for Defence and Security Studies. p. 35. Archived from the original (PDF) on 23 January 2021. Retrieved 2 February 2021.
  2. ^ a b "Chinese Equipment Guide" (PDF). US Navy Intelligence Office.
  3. ^ Collins, Jack. "Chinese Fighter Development". China-defence.com. Archived from the original on 2007-01-16. Retrieved 2007-01-16.
  4. ^ a b c "考据的魅力——教你如何识别中国苏-27系列战机" [The charm of textual research - teach you how to identify the Chinese Su-27 series fighters]. SINA (in Chinese). 20 August 2014. Archived from the original on 23 March 2015. Retrieved 5 March 2015.
  5. ^ a b c "Final Gift From the Soviets: How China Received Three of the USSR's Top Fighters Weeks Before the Superpower Collapsed". military watch magazine. 14 August 2022.
  6. ^ E. Tyler, Patrick (7 February 1996). "China to Buy 72 Advanced Fighter Planes From Russia". New York Times.
  7. ^ a b Wei, Bai (May 2012). "A Flanker by any other name". Air Forces Monthly (290): 72–77.
  8. ^ Saunders et al., p. 35
  9. ^ a b c d e f g h i Saunders et al., p. 36
  10. ^ a b c Fisher, Richard D., jr. (11 March 2015). "Images suggest upgrades to China's early series J-11s". IHS Jane's 360. Archived from the original on 2015-12-22. Retrieved 17 December 2015.
  11. ^ Saunders et al., p. 46
  12. ^ a b "Lenta.ru: "Рособоронэкспорт" пообещал разобраться с китайскими копиями Су-27". Archived from the original on 4 February 2015. Retrieved 4 February 2015.
  13. ^ Rupprecht, Andreas (December 2011). "China's 'Flanker' gains momentum. Shenyang J-11 update". Combat Aircraft Monthly. 12 (12): 40–42.
  14. ^ Andreas Rupprecht. December 2011. "China's 'Flanker' gains momentum. Shenyang J-11 update". Combat Aircraft Monthly. Vol. 12, No. 12, p. 40–42.
  15. ^ a b "J-11B fighter". People's Daily Online. 4 November 2009. Retrieved 11 November 2020.
  16. ^ a b Saunders et al., p. 37
  17. ^ a b c d Parsons, Ted (10 May 2010). "Chinese naval J-11s spotted in the open". IHS Jane's 360. Archived from the original on 12 May 2010. Retrieved 18 December 2015.
  18. ^ "我军歼11B首曝挂载Pl15导弹 或换装有源相控阵雷达". 27 March 2019. Archived from the original on 2019-03-30. Retrieved 2019-03-30.
  19. ^ Fisher, Richard Jr. (13 December 2004). "Report on the 5th Airshow China: Zhuhai, PRC, November 1-7, 2004". International Assessment and Strategy Center. Archived from the original on 2005-04-26. Retrieved 2019-07-03.
  20. ^ Fisher, Richard D. Jr. (7 October 2003). "New Developments in Russia-China Military Relations: A Report on the August 19-23 2003 Moscow Aerospace Salon (MAKS)". United States-China Economic and Security Review Commission. Archived from the original on 12 January 2005. Retrieved 25 May 2015.
  21. ^ Pomfret, John (25 December 2010). "Military strength eludes China, which looks overseas for arms". Washington Post. Archived from the original on 31 December 2016. Retrieved 3 September 2017.
  22. ^ a b c Rupprecht, Andreas (December 2011). "China's 'Flanker' gains momentum. Shenyang J-11 update". Combat Aircraft Monthly. Vol. 12, no. 12. pp. 40–42.
  23. ^ a b c Fisher, Richard D. Jr. (26 August 2014). "Chinese J-11BH 'aggressive' with USN P-8A, says DoD". Jane's Defence Weekly. Archived from the original on 2014-08-27. Retrieved 2019-07-03.
  24. ^ "Pak Air force conducts joint exercise with China". The Times of India. 19 March 2011. Archived from the original on 1 July 2012. Retrieved 23 May 2011.
  25. ^ Zambelis, Chris (20 May 2011). ""Shaheen 1" Exercise Signals Expansion of China-Pakistan Alliance". China Brief Volume: 11 Issue: 9. The Jamestown Foundation. Archived from the original on 12 September 2011. Retrieved 23 May 2011.
  26. ^ a b Capaccio and Greiling Keane, Tony and Angela (August 22, 2014). "Chinese Jet Barrel-Rolls Over U.S. Plane Bringing Protest". Bloomberg L.P. Archived from the original on January 3, 2017. Retrieved March 11, 2017.
  27. ^ Keck, Zachary (August 23, 2014). "China's 'Dangerous Intercept' of US Spy Plane". The Diplomat. Archived from the original on November 21, 2014. Retrieved October 30, 2014.
  28. ^ "Defense.gov Transcript: Department of Defense Press Briefing by Admiral Kirby in the Pentagon Briefing Room". Archived from the original on 30 October 2014. Retrieved 4 February 2015.
  29. ^ "China urges U.S. to stop close-in surveillance". Xinhua. 23 August 2014. Archived from the original on 23 August 2014. Retrieved 8 March 2015.
  30. ^ Wong, Kelvin (12 November 2014). "Airshow China 2014: AVIC unveils FC-31 export fighter concept". IHS Jane's 360. Archived from the original on 19 December 2015. Retrieved 17 December 2015.
  31. ^ "Flanker: The Russian Jet That Spawned Many New Versions". May 14, 2018.
  32. ^ "PLA-AF and PLA-N Flanker Variants". January 27, 2014.
  33. ^ Richard D. Fisher Jr. (2012-03-19). "China Modernizes Air Force On Dual Tracks". Aviation Week & Space Technology. Archived from the original on 2013-05-12. Retrieved 2012-07-10.
  34. ^ a b Yeo, Mike (2 November 2015). "PLAN holds snap drills in South China Sea". IHS Jane's 360. Archived from the original on 2015-12-22. Retrieved 17 December 2015.
  35. ^ "Can China Enforce a South China Sea ADIZ?". usni.org. 18 July 2016. Archived from the original on 22 April 2019. Retrieved 2 February 2019.
  36. ^ "J-11B images fuel speculation about AESA radar upgrade". Janes.com.
  37. ^ "Shenyang J-16D Flanker L". Retrieved July 23, 2022.
  38. ^ Fisher, Richard D., jr. (5 May 2015). "Images show J-11D variant with possible new radar". IHS Jane's 360. Archived from the original on 20 December 2015. Retrieved 17 December 2015.
  39. ^ Rupprecht, Andreas (29 October 2018). Modern Chinese Warplane: Chinese Air Force - Aircraft and Units. Harpia Publishing. p. 46. ISBN 978-09973092-6-3.
  40. ^ Rupprecht, Andreas (2018). Modern Chinese Warplane: Chinese Naval Aviation - Aircraft and Units. Harpia Publishing. p. 21. ISBN 978-09973092-5-6.
  41. ^ Sukhoi Su-27SK Archived 2013-09-20 at the Wayback Machine. KNAAPO.
  42. ^ "Sukhoi Company (JSC) – Airplanes – Military Aircraft – Su-27SК – Aircraft performance". Sukhoi.org. Archived from the original on 2011-07-16. Retrieved 2011-05-12.
  43. ^ "Sukhoi Su-27 Flanker Specifications". Sinodefence.com. Archived from the original on 2010-01-13. Retrieved 2011-12-22.
  44. ^ "Sukhoi Company (JSC) – Airplanes – Military Aircraft – Su-27SÊ – Aircraft performance". Archived from the original on 16 July 2011. Retrieved 4 February 2015.
  45. ^ "Chinese Aircraft - J-11 [Su-27 FLANKER]". www.globalsecurity.org. Archived from the original on 6 January 2019. Retrieved 2 February 2019.
  46. ^ "Sukhoi Su-27 Flanker". Fighter-planes.com. Archived from the original on 2011-07-11. Retrieved 2011-05-12.
Bibliography

External links[edit]