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Sturgeon's House

Vicious_CB

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Posts posted by Vicious_CB

  1. Here is another good one: Abrams upper glacis test.

     

     

    Dejmian XYZ
    I wanted to present plans for the future, but I will present plans for the next simulations. I would like to simulate the armor of the Abrams again, as I read somewhere that the thickness of the glacis was increased in later versions, but now I'm not sure. So if anyone has good source it would be helpful. If not, I will do it for 38mm, but with a side angle, so that the total inclination is 83-84 degrees. I would also like to do one simulation at low projectile speed to test the ricochet. One of the slower APFSDS is the OFL-90-F1 (1275m / s).
     

    Also it looks like hes looking for info for another Abrams test. AFAIK the upper glacis thickness was never changed from the original 38mm plate. 

  2. On 5/7/2021 at 4:44 PM, Sturgeon said:

     

    All these "assault" belt feds are a bit of a joke. I am glad they're trying, at least.

     

    Im more curious about their barrel tech than the gun itself.

     

    Another interesting note is that there are no operator barrel changes with EVOLYS. They’re so confident in the metallurgy of the barrel that you won’t have to swap barrels during sustained fire. Barrel changes will require tools and about two to three minutes to accomplish.

     

    https://soldiersystems.net/2021/05/07/fn-evolus-the-details/

  3. On 10/21/2017 at 7:44 AM, Collimatrix said:

     

     

     

    2)  I believe that the heavy ERA designed specifically to counter KEPs is designed to snap the projectile.  Other reactive armors don't necessarily work the same way.  I've seen papers on ERA with low-density ceramic and polymer flyer plates, and it apparently works as well as steel on a weight basis.  Look up "The Defeat of Shaped Charge Jets by Explosively Driven Ceramic and Glass Plates" by Paul Hazell if you have access to journals and you're curious.  That said, there may be some use of heavier materials in reactive armor arrays.  @SH_MM is of the opinion that the depleted uranium in the Abrams' armor is incorporated into some sort of NERA, although I personally suspect otherwise.

     

     

    Im curious if other properties of the material besides just its density and hardness have more of an effect on the flyer plate/projectile interaction. In this guy's models going from HHS to tungsten alloy doesnt seem to have a major difference other than a bit more upward deflection. It seems to hint at things like heat capacity might be at play when resisting the atomizing of the plate and projectile eating up more energy. 

     

     

     

  4. 6mm ARC 106 gr TAP (ballistic tip)

     

    Firearm: Noveske/Proof Barrel | Barrel: 18" | Twist Rate: 1:7.5

    Muzzle Velocity: 2625 fps

    Energy: 1622 ft/lbs

    1

     

    Bare Gel

    Total Penetration 18”  Max Cavity 6”   Depth of Max Cavity 5.5”  Neck .5”

    Retained Weight 76.8gr  Expanded Diameter .53”

    81605-bare.jpg

     

    Auto Glass

    Total Penetration 15.5”  Max Cavity 4”   Depth of Max Cavity 3”  Neck 0”

    Retained Weight 41.2gr  Expanded Diameter .35”

    81605-glass.jpg

     

    Steel

    Total Penetration 17.5””  Max Cavity 5”   Depth of Max Cavity 4”  Neck 0”

    Retained Weight 70.4gr  Expanded Diameter .40”

    81605-steel.jpg

     

    https://www.hornadyle.com/rifle-ammunition/6mm-arc-106-gr-tap#!/

  5. On 8/21/2020 at 12:46 PM, LoooSeR said:

       RPL-20 MG developed by KC for MoD, based on MoD experience with RPK-16 field test and combat experience.

     

      100 round box belt fed (non-disintegrating links) 5.45mm caliber LMG, changable barrels.

     

    https://vk.com/wall-185869580_1966

    Vladimir Onokoy about it.

     

     

     

     

     

    Is this the thing they were talking about in July? 

     

    https://ria.ru/20200702/1573765210.html

  6. On 7/14/2019 at 7:23 PM, Ramlaen said:

     

    No.

     

     

     

     

    CROWS-LP

     

     

     

     

    Dumb people are dumb and where would you store the missiles?

    On March 21, Gen. Robert Abrams, commanding general of U.S. Army Forces Command, stated FORSCOM’s position is that the Army should “immediately stop the fielding of CROWS-LP [Common Remote Operating Weapon Station – Low-Profile] systems to Forces Command Armored Brigade Combat Teams (ABVT),” in a memorandum directed at the vice chief of staff for the Army, which was obtained by Task & Purpose.
    The memo goes on to say, “The CROWS-LP system does not correct tank commander visual and fire control issues.”
    Ten days later, Army Acquisition Command issued a stop-work order to CROWS Low-Profile manufacturer Kongsberg Defence & Aerospace, according to a copy of the order, also obtained by Task & Purpose.
    The problem is, nobody from the Army or the Defense Department seems to know the details of the stop-work order or the FORSCOM memo.

     

    I guess it never came to pass.

  7. On 6/10/2019 at 8:42 AM, Ramlaen said:

     

    Probably not, having a CROWS-J on an Abrams is also extremely unlikely.

     

    Wasnt there a stop production order on the CROWS-LP a while back? What CROWS are the M1A2C shipping with? 

     

    I wouldnt mind the Abrams with a CROWS-J, not because it would be useful, but so that people can stop saying "Abroomz sux cause no gun launched missile" 

  8. On 6/14/2019 at 1:45 PM, Sturgeon said:

     

    I don't think it matters. When I design an EPR, I usually try to balance the masses of the two parts at least roughly, but to save time a lot of what I do is iterative based on older works. So some of the relationships are copied over several times from decisions made by me 2-3 years ago.

     

    I heard from a little bird that the mechanism for yaw independent fragmentation has to do with fluid expansion starting in the gap between the penetrator and jacket. Perhaps there is a ideal location to optimize flow into the gap to initial expansion. 

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