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    Chengdu J-20 Stealth Fighter

    Backman
    Backman

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    Post  Backman Wed Mar 31, 2021 1:04 pm

    A National Interest writer kicked the hornets nest. Very Happy What is the truth ? Nobody knows because China never releases official information on any of this stuff

    https://nationalinterest.org/blog/reboot/china%E2%80%99s-j-20-stealth-fighter-getting-major-boost-thanks-russia-181006

    China’s J-20 Stealth Fighter is Getting a Major Boost - Thanks to Russia

    In yet another example of Sino-Russian military cooperation, Chinese J-20s will be carried aloft on the backs of Russian engines.

    Here's What You Need to Remember: Ultimately the newest variant of the Chinese-built J-20, the J-20B, is intended to be equipped with powerful Chinese-designed WS-15 engines that would offer increased performance, likely better fuel efficiency, and a higher-altitude flight envelope. But because the production of the newer engine is lagging behind schedule, China has opted for a foreign design made in Russia.

    One of the J-20’s more prominent features are canards, small wing-like control surfaces near the cockpit. Although canards are not necessarily incompatible with stealthy designs, they present radar operators with another surface that can reflect radar away from an airframe and amplify an aircraft’s radar signature. But the potential problems don’t end there—engines are another area that hinders the J-20.

    RupprechtDeino's reaction

    https://twitter.com/RupprechtDeino/status/1377217186788413449

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    bren_tann
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    Post  bren_tann Thu Apr 08, 2021 12:53 am

    Chengdu J-20 Stealth Fighter - Page 9 89cacb28gy1gp7l7ksrxzg20m80d7e85-gif

    Chengdu J-20 Stealth Fighter - Page 9 49eca83dgy1gp90o7eo4aj21kf0petev-jpg

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    walle83

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    Post  walle83 Yesterday at 10:16 am

    Back and forward about the WS-15.

    https://www.scmp.com/news/china/military/article/3130340/chinas-j-20-mighty-dragon-fighters-set-get-purpose-built

    The fifth-generation jets were designed to compete with US F-22s but have been using stopgap engines that limited their speed and combat capabilities
    China has spent two decades trying to master the technology behind the WS-15 engine, which a military source says is now almost ready to enter service

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    Finty
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    Chengdu J-20 Stealth Fighter - Page 9 Empty China’s J-20 ‘Mighty Dragon’ fighters set to get purpose-built engines ‘within next two years’

    Post  Finty Yesterday at 1:09 pm

    Saw this the other day, another article about thrust vectoring...


    https://www.globaltimes.cn/page/202104/1221492.shtml

    GlobalTimes wrote:The pilot who first flew the J-20 believes that China's most advanced stealth fighter jet will be upgraded with 2D thrust vectoring nozzles for its engines, according to a recent news report.

    This means the warplane will receive enhanced maneuverability and stealth capability and surpass its US counterpart, the F-22, a Chinese military expert said on Monday.

    The J-20 is expected to be equipped with engines with 2D thrust vectoring nozzles, said Li Gang, the pilot of the J-20's first flight, when asked about his expectations on the future development of the J-20's thrust vector control capability in a recent interview with Hong Kong-based Phoenix TV aired on Monday.

    J-20s in service with the People's Liberation Army (PLA) Air Force currently all use circular nozzles with no thrust vector control capability, analysts said.

    Thrust vector control will provide extra maneuverability and 2D nozzles can enhance stealth capabilities of the J-20, Fu Qianshao, a Chinese military aviation expert, told the Global Times on Monday.

    With the flight performance of the J-10B thrust vector control demonstrator at the Airshow China 2018 in Zhuhai, South China's Guangdong Province, China displayed its capability to develop and apply 3D thrust vectoring technology on fighter jets.

    Explaining the differences between 2D and 3D thrust vectoring, Fu said that 2D nozzles are rectangular and 3D nozzles are circular, meaning that 2D nozzles have better radar and infrared stealth capabilities than the 3D nozzles.

    The F-22 stealth fighter jet of the US Air Force uses 2D thrust vectoring, analysts noted.

    3D nozzles are often believed to be capable of providing more thrust angles than 2D nozzles, as F-22's 2D nozzles can only move vertically, but this is a common misunderstanding, Fu said, noting that 2D nozzles can also move horizontally to provide horizontal thrust when so designed, but this design could add development costs.

    In the Phoenix TV report, Li also said that he expects the J-20's thrust vectoring nozzles to move only vertically like the F-22, but Fu said that he hopes the J-20's future nozzles will be able to move horizontally, which will make the PLA fighter jet surpass its US counterpart in this aspect.

    It has been long expected that the J-20 will eventually receive thrust vectoring-capable engines.

    When asked about when the J-20 can get thrust vectoring-capable engines at a press conference of Airshow China 2018, shortly after the J-10B thrust vector control demonstrator made its flight performance, Yang Wei, chief designer of the J-20, replied, "You asked about when, but how do you know it hasn't?" This statement is widely interpreted by military observers that the J-20's developers have been testing thrust vector control on the aircraft for a long time.

    2021 marks the 10th year of the J-20's maiden flight, and the stealth fighter jet is seeing many new developments, including domestically made engines, removal of Luneburg lens in exercises, and possible development of a twin-seat variation, according to media reports.
    Backman
    Backman

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    Post  Backman Yesterday at 3:52 pm

    We should be seeing pics of these 2D nozzles if they are gonna come out anytime soon on a production variant. 2D is better for stealth but there's a 15% power penalty

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