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59 posters

    T-90 Main Battle Tank #2

    pukovnik7
    pukovnik7


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    Post  pukovnik7 Wed Dec 29, 2021 10:46 am

    GarryB wrote:It is interesting that the design of Kornet has a small precursor charge in the nose to set off ERA and start the penetration, behind that is the small server motors that control the nose fins for steering, and then the main body of the missile is solid rocket fuel with a hole down the centre... and behind that near the back is the large full calibre HEAT warhead and behind that the rear looking sensor that sees the laser beam the missile rides down and the rear fixed stabiliser fins.

    The rocket exhausts point backwards and sidewards and the fuel in the centre of the missile burns during flight so the centre of gravity of the missile does not really shift as the fuel burns and the forward force from the rocket motors comes from the centre of gravity too so keeping the missile flying straight and level is relatively easy but the main charge warhead is mounted so far back that there is plenty of empty space in front of it to form a good armour penetration plasma beam that continues the hole the nose mounted charge has started.

    There is a lot of work that goes in to the design of these weapons, they are quite impressive really...

    Isn't nose mounted charge intended to activate ERA blocks? I don't think a small hole created by such a charge would really help in penetrating main armor.
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    ALAMO


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    Post  ALAMO Wed Dec 29, 2021 11:11 am

    It is.
    But that is not Garry's point.
    This is an unusual construction, much discussed when revealed. Main charge is located behind the engine, and the cumulative stream forms itself via a shaft left in the middle of the missile.

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    GarryB
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    Post  GarryB Wed Dec 29, 2021 12:41 pm

    This is just another story, where Russkies are far ahead of the US based competitors in all the spheres other than propaganda.

    A large part of it was that they just set their standards for armour and other things higher so on paper the performance might look less, but in practise you wont get less performance, while sometimes you might get better.

    Isn't nose mounted charge intended to activate ERA blocks?

    Yes, but at the time and even today quite a lot of western tanks don't have ERA so that front charge will just make a small penetration... the rear charge is aligned to continue that penetration and not to try to start a new one.

    I don't think a small hole created by such a charge would really help in penetrating main armor.

    It would penetrate some metal and of course heat it up as well, making penetration for the main charge easier.

    The real point is the arrangement of the components was unusual at the time.

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    ALAMO


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    Post  ALAMO Wed Dec 29, 2021 2:01 pm

    I remember some other, heavier missile sharing the very same concept. scratch
    lyle6
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    Post  lyle6 Wed Dec 29, 2021 11:37 pm

    pukovnik7 wrote:
    Isn't nose mounted charge intended to activate ERA blocks? I don't think a small hole created by such a charge would really help in penetrating main armor.

    The precursor is not just effective in prematurely setting of the ERA/NERA layer: the shaped charge jet tip is actually way too fast to be caught by even the retreating moving plates that it actually makes contact with the face plate. This is significant, because in theory if there's no external ERA/NERA layer a strong enough precursor that could pierce through the face plate could also prematurely set-off the reactive elements of the internal armor array which is usually some form of NERA. NERA might have some element of multi-hit capability but I doubt it extends to protecting the very same spot. Anyways, without the reactive armor to shatter/tilt/disrupt the offending projectile the rest of the armor is easy - the last layers are really there just to take care of residual penetration and spall. If the reactive layers are defeated the projectile would most likely plow on through.

    Also found the paper I was somewhat referencing from memory from my post earlier:
    https://www.mdpi.com/1996-1944/14/21/6526

    Compared with the DOP when the simulated cabin is not installed, the DOP of the SCJ
    warhead on the steel target is reduced by about 40%; in other words, the negative impact
    of the simulated cabin on the penetration capability of the SCJ warhead is about 40%.
    Compared with the DOP under the best standoff situation, the DOP of the SCJ warhead on
    the steel target is reduced by 76.5%. In other words, the penetration capability of the SCJ
    warhead designed by this research on the Q235 steel target is reduced by 76.5% under the
    combined influence of the standoff and the simulated cabin.

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    Post  Krepost Fri Dec 31, 2021 1:01 am

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