J-20 5th Gen Fighter Thread VI

Discussion in 'Air Force' started by siegecrossbow, Sep 4, 2017.

  1. SilentObserver
    Offline

    SilentObserver Junior Member
    Registered Member

    Joined:
    Apr 22, 2015
    Messages:
    162
    Likes Received:
    428
    Yang Wei is quite the talent.
    • China's youngest general designer
    • Completed undergraduate by 19, graduate by 22
    • Became director at 38
    • One of the founders of fully digitized fly by wire systems in China
    • Lead for JF-17 from scratch to flight in 4 years
    • Lead for J-10 twin seater
    • Lead for J-20
    https://en.wikipedia.org/wiki/Yang_Wei_(aircraft_designer)

    The H-20 program would most likely use some of the same suppliers as the J-20 (J-20 uses many civilian suppliers too). There would be shuffling around of engineers from other programs but not sure about the lead designer.
     
  2. latenlazy
    Online

    latenlazy Colonel

    Joined:
    Jun 24, 2008
    Messages:
    4,312
    Likes Received:
    3,515
    Studies on the H-20 design would have had to be conducted in parallel to a lot of other programs. Wherever else talent might have come from I would fully expect most of the expertise to be drawn from that pool.
     
    Equation and N00813 like this.
  3. siegecrossbow
    Offline

    siegecrossbow Brigadier
    Staff Member Super Moderator

    Joined:
    Mar 22, 2010
    Messages:
    6,252
    Likes Received:
    9,131
    He pretty much confirmed that the J-20 uses the small-aspect wing LERX canard configuration from Dr. Song's paper and that the aircraft balances supersonic capabilities/handling with maneuverability. A lot of our theories have been vindicated after seven years.
     
    perfume, Bltizo, Figaro and 3 others like this.
  4. taxiya
    Offline

    taxiya Major
    Registered Member

    Joined:
    Dec 24, 2006
    Messages:
    3,831
    Likes Received:
    8,526
    Thanks for the video, at 2:40, Yang Wei stated that "J-20 is using the metamaterial". That confirmed my speculation.
     
    perfume, Yodello, Figaro and 3 others like this.
  5. Jura
    Offline

    Jura General

    Joined:
    Jun 23, 2013
    Messages:
    23,900
    Likes Received:
    27,767
    now noticed the tweet https://twitter.com/HenriKenhmann/status/975991161000050688
    East Pendulum‏ @HenriKenhmann 13h13 hours ago




    Les méta-matériaux, développés par les entreprises civiles chinoises, ont été utilisés sur l'avion de chasse J-20. L'information a été annoncée aujourd'hui par son ingénieur en chef YANG Wei à Pékin devant les journalistes.

    Translated from French by Microsoft
    The meta-materials, developed by Chinese civil companies, were used on the J-20 fighter aircraft. The information was announced today by its chief engineer YANG Wei in Beijing in front of the journalists.

    [​IMG]
     
  6. Tirdent
    Offline

    Tirdent Junior Member
    Registered Member

    Joined:
    Nov 22, 2017
    Messages:
    456
    Likes Received:
    652
    The radome limiting the radar's working frequency range (stated by Dassault as the reason for not pursuing AESA wide-band capabilities) is kind of a *big* clue though.

    I doubt that information is in the public domain. Also, there isn't necessarily only one pattern that gives the desired results, if you research metamaterial literature there are endless variations (I have a picture alleged to be the Eurofighter FSS somewhere and it actually looks quite different to the FSS shroud Sukhoi tinkered with, despite the similar purpose).

    As for the method of manufacture, as Aronstein reports the very tedious method of mechanically drilling the metallic template was only used during the Dem/Val (i.e. YF-22) phase, for EMD (production) manufacture was done by etching. That's the same process as used for PCBs in other electronics applications, a very flexible and high-fidelity method.

    The pattern doesn't look like that seen in the Chinese documentary, but as mentioned that's irrelevant (different tyre manufacturers use different tread patterns which all do much the same job nonetheless). It certainly looks a lot like it would have been made like a PCB though, rather like the F-22 material.

    Well, radome bandpass materials have been mass produced enough to equip well over 1000 fighters to date (180 F-22, 520 Eurofighter, 160 Rafale, 250+ F-35) and counting. It's not exactly an artisan craft ;)

    Fair enough, I can well believe an improved production process. It's still difficult to judge how big a break-through it is and hence what the impact could be. Is it Dunlop's pneumatic tyre (a revolutionary development which came to dominate virtually all modern embodiments of the wheel as used in locomotion) or is it merely a rationalization that further drives down the cost of manufacturing something which is already a commodity?
     
    Air Force Brat likes this.
  7. Klon
    Offline

    Klon Junior Member
    Registered Member

    Joined:
    Jul 26, 2017
    Messages:
    563
    Likes Received:
    960
    pb19980515:
     
    N00813 likes this.
  8. Jura
    Offline

    Jura General

    Joined:
    Jun 23, 2013
    Messages:
    23,900
    Likes Received:
    27,767
    now noticed
    J-20’s advanced versions to help China seize air superiority in Asia-Pacific: specialist

    Published: 2018/3/20 http://www.globaltimes.cn/content/1094262.shtml

     
    perfume and siegecrossbow like this.
  9. damon
    Offline

    damon New Member
    Registered Member

    Joined:
    Apr 30, 2017
    Messages:
    13
    Likes Received:
    128
  10. Deino
    Offline

    Deino Lieutenant General
    Staff Member Super Moderator

    Joined:
    Sep 15, 2005
    Messages:
    10,195
    Likes Received:
    26,502
Loading...

Share This Page