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    General Main Battle Tank Technology Thread:

    George1
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    Post  George1 on Wed Nov 14, 2018 8:48 am

    Turkish-Indonesian "medium" tank Harimau at the exhibition Indo Defense 2018

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    George1
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    Post  George1 on Wed Sep 11, 2019 5:41 pm

    New turret for the Challenger 2 tank


    At the Defense Exhibition Defense and Security Equipment International (DSEI) 2019, held in London from September 10 to 13, 2019, the British joint venture Rheinmetall BAE Systems Land (RBSL), recently created by the German group Rheinmetall and the BAE Systems corporation, presented a demonstrator of the radical modernization of the British main tank Challenger 2 for the long-running program of the British army Challenger 2 Life Extension Project (LEP). RBSL's proposal is to install a new turret on the tank with the Rheinmetall Rh 120 L55A1 120 mm smoothbore tank gun.

     At the DSEI-2019, a tank demonstrator is displayed, equipped with a new turret model (the actual tower developer is Rheinmetall). The upgraded tank will also be equipped with completely new fire control, surveillance and communication systems, and the DM11 programmable high-explosive fragmentation round will be included in the ammunition of the new 120 mm smoothbore gun. 1200 hp diesel engine perkins It is also supposed to be replaced by a German MTU of 1,500 hp.

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    Isos
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    General Main Battle Tank Technology Thread: - Page 21 Empty I couldn't find the right thread for that video so I put it here.

    Post  Isos on Sat Nov 02, 2019 9:09 pm

    I couldn't find the right thread for that video so I put it here.



    It is a good explaination of how leo 2A5 add on protection works on the turret. Contrary to what I thought it is not "armor" but a "trap" for APFSDS. That doesn't add a value in millimeters to the protection and if you have a long enough apfsds it is useless and the protection value falls to that of leo 2A4. The t-14 new rounds should be able to counter that effect.
    GarryB
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    Post  GarryB on Sun Nov 03, 2019 12:21 am

    Hahahaha.... nice try... but that is just crap.

    Are you trying to say that to protect a tank from any sheet metal structure a metre from the surface armour will yaw the penetrator and make it ineffective?

    Really?

    So can you please explain how APFSDS rounds were shown to penetrate the frontal armour of monkey model Iraqi T-72s during Desert Storm and were also able to exit the rear of the vehicle... through the engine compartment and out the back of the vehicle?

    That is just bullshit.

    I do agree that angled plate is only effective against full calibre armour penetrators by deflecting their path and causing them to bounce or ricochet, but sabot rounds don't bounce or ricochet... even after passing through things... otherwise sitting your tank behind any structure at all would make it safe.

    The new Afghansti APS system uses directed explosions to yaw APFSDS rounds to render them ineffective, but I am seriously doubting this contraption on Leopard tanks does that too.
    Isos
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    Post  Isos on Sun Nov 03, 2019 12:47 am

    Well it's not like germans would lie and put into service something that doesn't work. It was tested against nato rounds which are longer than russian ones (that are in service). I can't argue on that as I have no knowledge about this technology. I thought it was full of hard metals at first and it ended up being empty add on.

    The other nice thing is that it is very good against HEAT missiles. It's a 1m spaced armor that degrade significantly the penetration capability the warehead.
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    Post  GarryB on Sun Nov 03, 2019 1:05 am

    Except most HEAT warheads would be directed at the sides or rear of tanks... even Konkurs penetrated Abrams turrets in such situations.

    Well it's not like germans would lie and put into service something that doesn't work.

    The west lied for decades about their super powerful ATGMs... Milan and TOW could penetrate metres of armour it seems.

    Spaced armour simply isn't that effective... but it is light and it is cheap... so who is getting screwed because Leopards are not cheap tanks...
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    General Main Battle Tank Technology Thread: - Page 21 Empty APFSDS yaw

    Post  Swede55 on Sun Nov 03, 2019 3:36 am

    If you want to yaw an APFSDS projectile, wouldn't holy armour work better than thin steel plates, ie steel
    plates with closely spaced holes about the diameter of the expected enemy projectile. Then the long rod or projectile would probably hit an edge of the hole, causing resistance on one side of the projectile with no resistance on the other side, causing yaw. The Israelis used this as side protection on their M113's as I recall.
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    Post  GarryB on Sun Nov 03, 2019 3:59 am

    I have seen grazing penetrations of tank turrets that gouged a channel about a metre long in the near horizontal top of a turret... if that didn't make it yaw then plates with holes in them wont either.

    Have seen lots of designs including with metal balls packed inside a space where they can move with the initial impact, and I have seen layered armour types designed to slide and shear off the sharp tip of a penetrator... the most effective were the heavy ERA designs that did just that... guillotined the tip of the penetrator so that it had to waste a lot of energy penetrating with a blunt tip. At the speeds it is moving it still penetrates, but not as efficiently as it needs to forge itself a new tip on the main armour.

    Armour plate with holes in it as the huge advantage of obviously being lighter than a solid sheet of metal, and if you layer them you can cover more area with less weight and less cost in metal, but it is really only effective against full calibre rounds like HMG ammo because full calibre rounds readily yaw which renders their penetration performance down to near zero against armour that would not normally stop that sort of round.

    Perforated steel planking is used for makeshift airfields to allow heavy vehicles to operate in places that would otherwise get too muddy too quickly to be useful... so there would be an abundance of metal sheets with holes in it laying around to be pinched and used in fixed positions...
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    Post  kvs on Sun Nov 03, 2019 3:14 pm

    People have no physical intuition about what a sabot projectile sees. It basically sees soft targets (even if they are hardened
    steel) and a husk is the least likely to induce any trajectory deviation. A meter thick plate of armor would have much more
    impact on disrupting the sabot trajectory much like a bullet fired through gelatin. The interior of the solid armor becomes an
    echo chamber of shock waves that can focus and resonate. A husk like the one shown is basically invisible to the sabot.

    Hole
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    Post  Hole on Sun Nov 03, 2019 4:22 pm

    The so-called arrowhead-spahed armour modules covering the frontal arc of the turret are made of laminated armour. They consist of three parts: the disturber, the disrupter (which is intended to break the KE-penetrator) and the absorber (which absorbs the splinters of the broken penetrator).
    kvs
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    Post  kvs on Sun Nov 03, 2019 7:58 pm

    Hole wrote:The so-called arrowhead-spahed armour modules covering the frontal arc of the turret are made of laminated armour. They consist of three parts: the disturber, the disrupter (which is intended to break the KE-penetrator) and the absorber (which absorbs the splinters of the broken penetrator).

    That's the claim, but the photo shows an object which has walls too thin to matter. In fact, the photo indicates fraud. Since
    any serious laminated armor would have substantial amounts of ceramics. A thin layer of ceramics is pointless.

    George1
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    Post  George1 on Mon Aug 03, 2020 10:56 am

    Tests of the 130-mm Rheinmetall tank gun


    The German group Rheinmetall has distributed photos and videos of tests of its promising 130-mm smooth-bore L51 tank gun installed in a new turret with an automatic loader on the chassis of the British main tank Challenger 2. This combination was created as part of another proposal for the long-running program of the British army to modernize these tanks Challenger 2 Life Extension Programe (LEP). A prototype of a promising 130-mm smoothbore tank gun Rheinmetall L51, installed in a new turret with an automatic loader on the chassis of the British main tank Challenger 2 (c) frame from Rheinmetall video

    Recall that in 2019, the British joint venture Rheinmetall BAE Systems Land (RBSL), created by Rheinmetall and BAE Systems Corporation, presented a demonstrator of the modernization option for the British Challenger 2 tank under the British Army Challenger 2 Life Extension Project (LEP) with the installation of a new tower with 120 -mm smoothbore tank gun Rheinmetall Rh 120 L55A1 (the actual developer of the tower itself is also Rheinmetall). Now a variant with the promising 130-mm L51 tank gun, which is being developed by Rheinmetall, is also presented, although the likelihood of the British choosing a new 130-mm cannon, which is actually only in the initial stage of development, seems unlikely.

    Rheinmetall's advanced 130mm smoothbore tank gun, originally designated Next Generation (NG) 130, was first presented at Eurosatory 2016 in Paris in June 2016. Field tests of the first prototype ("technology demonstrator") of the 130-mm cannon began in 2019, and a Rheinmetall spokesman reported that by November 2019, about 80 rounds of the first prototype gun had been fired at the range, and that the production of the second had begun. a prototype gun with certain design changes.

    The developer said the 130mm gun has a 51 caliber (L51) barrel and uses new high-strength steel and a chrome-plated barrel. The gun is equipped with a vertical wedge breech, an electric mechanism for firing a shot and an increased chamber volume, which allows the use of a larger charge to obtain a higher initial velocity and, therefore, higher armor penetration characteristics. According to the representative, the gun barrel has an insulating casing and a barrel bend control system. The barrel of the 130 mm cannon has an actual length of 6.63 m, and the total weight of the gun is 3000 kg, including retractable mechanisms, but without mounting elements for installation in the turret.

    A spokesman for Rheinmetall stated that the chamber of the first experimental gun NG 130 has a volume of 15 liters and a design pressure of 880 MPa, but that “thanks to the experience and knowledge gained during testing in real time, this data will be changed in the next stage of development.”

    First 130 -mm round, developed by Rheinmetall, is an APFSDS-T armor-piercing projectile with a detachable tray (APFSDS-T) with a semi-combustible sleeve, a new high-energy powder charge classified as insensitive to detonation, and a new improved long-length tungsten armor-piercing core with increased armor penetration.

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    kvs
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    Post  kvs on Thu Sep 17, 2020 5:13 am

    https://www.zerohedge.com/technology/sci-fi-awesome-hypersonic-smart-bullet-fired-tank-downs-cruise-missile

    "Smart bullet" for tanks. bounce

    "Sci-fi awesome" that will change the nature of tank warfare, and other dick stroking stories.

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    Post  GarryB on Thu Sep 17, 2020 1:23 pm

    Tiny problem with that story is that it compares the cost of a high velocity gun fired round with the cost of a cruise missile, and a helicopter launched anti armour missile and a shoulder launched anti armour missile that wasn't that much cheaper than a hellfire but rather less capable in every way...

    The point is that these very high velocity rounds are kinetic rounds so shooting down targets if they are guided works, but despite being much much cheaper than a Tomahawk missile these high velocity guns probably can't hit targets 1,500km away with a 400kg HE payload either... so it is not really that relevant.

    If they are using it to shoot down subsonic cruise missiles then it might be relevant to compare the price of Patriot and ground launched AMRAAM and Stinger missiles I suppose...


    BTW regarding German tank armour... in the Gulf War US troops claimed to have fully penetrated Iraqi monkey model T-72s... front hull armour... through the entire crew compartment and turret area, through the engine and out the rear of the vehicle... why don't their penetrators yaw with what would effectively be more than 2.5m of spaced armour...

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    Post  LMFS on Fri Sep 18, 2020 1:01 am

    Apparently they needed a lot of attempts to make the stunt work... guided ammo is known since old already and it is nice, but has its limitations.

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