Military Review

In China, they argue about the level of vibration in the internal weapons compartments of J-20

21
Fifth Generation Combat Fighter Generation Chengdu J-20 Demonstrated Inside Compartments Continued in China aviation (according to the Chinese classification - to the fourth). After showing open hatches armory compartments, individual users have stated that the placement of missiles can lead to high vibration and increased noise levels. The publication of this opinion indicated a large number of opponents of the voiced "theory".


In China, they argue about the level of vibration in the internal weapons compartments of J-20


Experts note that the design of the internal compartments itself can significantly reduce both noise and vibration.

It is stated that cameras are placed in the front of the compartment, passing through which air jets of high kinetic energy are directed between pairs of rockets.



As a result, air flows exert a certain lateral pressure on the ammunition suspended in the bomb compartment. In addition, the air entering through the inlet holes into the compartment also deflects at a certain angle downward, which compensates for the mentioned lateral pressure, in turn, making it possible to reduce the above indicators (vibration-noise) to a minimum.

Chinese airlogs claim that this technology of “controlling” incoming air flows is currently used only on fifth-generation Chinese fighters J-20.

From messages:
For example, the American F-22 does not have such a “design”.




Meanwhile, skeptics say that the depth of the J-20 bombing (missile) compartments is visually small, which means that even if they manage to place a missile (aerial bomb) of air-to-surface class with a large radius of operation (which is already called doubtful), the same air holes will no longer be able to guarantee low vibration and noise during a combat mission. Stated that the maximum in the compartment can be placed rocket class "air-air" medium-range - based on the dimensions.

The fighter manufacturer J-20 does not comment on the reasoning of the Chinese aviation bloggers.
Photos used:
China Military
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  1. Irokez
    Irokez 26 November 2018 15: 12
    +1
    Yes, that’s all. The lamb settled there.
    1. Andrey Yuryevich
      Andrey Yuryevich 26 November 2018 15: 24
      +7
      In China, they argue about the level of vibration in the internal weapons compartments of J-20
      shall we engage in a dispute? or what? what
    2. Samaritan
      Samaritan 26 November 2018 16: 14
      +2
      Their main problem, like the f-22, is 4 very limited air-to-air missiles and EVERYTHING ... this is not enough even for a "clean" fighter ...
      The Chinese made a big mistake: they went along the path of the USA and f-22 (which the USA themselves have already abandoned), as a result, an airplane was not needed ...
      1. voyaka uh
        voyaka uh 26 November 2018 17: 48
        -1
        6 missiles. Two more in the side internal compartments. The F-22 also has 6.
        1. Lozovik
          Lozovik 26 November 2018 19: 59
          +3
          Isn't it eight?



          1. voyaka uh
            voyaka uh 26 November 2018 21: 35
            +1
            Right Eight. I was wrong. Thanks for the amendment.
        2. NEXUS
          NEXUS 26 November 2018 21: 50
          +1
          Quote: voyaka uh
          6 missiles. Two more in the side internal compartments. The F-22 also has 6.

          What hangover does the F-22 6 rocket have?

          The main armament is located in three internal compartments - 6 medium-range air-to-air missiles AIM-120 AMRAAM (from 50 to 100 km) in the central ventral compartment and 2 short-range air-to-air missiles AIM-9 Sidewinder (up to 30 km) in two side compartments.
  2. svp67
    svp67 26 November 2018 15: 19
    +2
    individual users have stated that rocket placement can lead to high vibration and increased noise levels.
    How many aerodynamics experts there are in China ...
    1. Andrey Yuryevich
      Andrey Yuryevich 26 November 2018 15: 25
      +5
      Quote: svp67
      individual users have stated that rocket placement can lead to high vibration and increased noise levels.
      How many aerodynamics experts there are in China ...

      according to the population ...
  3. Leclerc
    Leclerc 26 November 2018 15: 22
    +2
    A noise problem has been identified - in the internal compartments two charging Chinese speak very loudly among themselves during breaks.
    1. svp67
      svp67 26 November 2018 15: 27
      +7
      Quote: Leclerc
      in the internal compartments, two charging Chinese speak very loudly to each other during breaks.

      And swearing exclusively in Russian
  4. Corsair0304
    Corsair0304 26 November 2018 15: 38
    0
    increased noise level

    And is that a problem? Then for whom - the pilot? Well, noisy, something vibrates there under the fifth point in the belly of a fighter ... it happens that there’s something to say. Maybe the tummy rumbles ..
    The main thing is to launch a rocket so that it normally leaves and it does not interfere with flows and outflows. And how much decibel will be created there is not even a second question.
    1. Gray brother
      Gray brother 26 November 2018 15: 57
      +9
      Quote: Corsair0304
      Well, noisy, something vibrates there under the fifth point in the belly of a fighter ... it happens that there’s something to say. Maybe the tummy rumbles ..

      After a certain number of hours spent on the suspension, the missiles are sent back to the factory for preventive maintenance or decommissioned altogether, all due to vibrations and other influences during the flight.
      The fewer impacts, the longer the life.
      1. Corsair0304
        Corsair0304 26 November 2018 16: 24
        +2
        Quote: Gray Brother
        The fewer impacts, the longer the life.


        Thank you enlightened. I speak without irony.
  5. Tu-16
    Tu-16 26 November 2018 16: 56
    +2
    The compartment is really small.
    1. NEXUS
      NEXUS 26 November 2018 21: 52
      0
      Quote: Tu-16
      The compartment is really small.

      This is despite the fact that in its class, the J-20 is overall the largest of the 5 generation fighters. The largest internal compartment is the SU-57. It is believed that in the internal compartments of 57, 10 missiles will be placed.
      1. Hammerlock
        Hammerlock 27 November 2018 03: 42
        0
        So they have a coal bunker in the J-20, they also work on coke. That's the dimensions lol
  6. 501Legion
    501Legion 26 November 2018 17: 13
    +1
    the dimensions of the aircraft itself are large, but the weapons compartment is too small.
    but at the approach you can clearly see a huge number of all kinds of sensors + on the sides of the bulge for the side radar can be.
  7. faterdom
    faterdom 26 November 2018 17: 43
    0
    In general, some kind of empty fuss ... At this location, the hatch opens to launch missiles, and who cares at this moment about noise or vibration? At the time of the shot, the tank is also very angry Shumen - a unmasking sign?
    And so in rockets designed to move and maneuver with dozens of g, everything that can be flooded with all sorts of epoxies and shake them with vibration for ten years is continuously necessary in order to break something there.
  8. Berkut24
    Berkut24 26 November 2018 20: 49
    0
    For example, the American F-22 does not have such a “design”.

    Such expressions always killed me. Again, the designers are to blame.
  9. Sands Careers General
    Sands Careers General 26 November 2018 22: 17
    +1
    Made in China, that’s it. Well, the Chinese cannot come up with something normal in this regard. Copy - yes, but they don’t have an airplane school, they didn’t go all the hard way from wooden biplanes to modern airplanes.