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Collimatrix

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Collimatrix last won the day on February 20

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About Collimatrix

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  1. At the behest of @Lord_James, this shall be the thread for general discussion of conventional passive metallic armor. Whether it's steel, titanium, magnesium, exotic laminates of all three, this is the thread for it. In answer to your earlier question, Lord_James, relatively small amounts of boron, in steels that have the appropriate levels of carbon, form intergranular barriers that dramatically slow the diffusion of carbon out of the austenite crystals during quenching. Long story short, this means that the depth of material that can be effectively hardened is much greater.
  2. One of the persistent mysteries I am trying to solve is why exactly the Swiss purchased the Dragon ATGM system, which was a pile of crap, when MILAN existed, which is only a few pounds heavier and also actually works. I found this publication, which contains an article on Swiss bicycle troops. As of 1994, the Swiss had three entire regiments of bicycle infantry. I thought this might be an answer; even though MILAN is only a little heavier than Dragon, for a bicycle-borne infantryman, a few pounds could make the difference. But no, this is not the explanation. The article states
  3. Indeed. Most of the early work on what would become the HK and CETME family of rifles was initially done in France by ex-Mauser employees. They later moved to Spain, which they seem to have preferred for its relaxed economic protectionism, drier climate, and slightly fascist dictatorship.
  4. Small wheels also have higher rolling resistance, and at high speeds tend to wear their rubber out faster.
  5. Interesting. The long pitch tracks I knew about, although there are practical limitations there, as the longer pitch tracks tend to be noisier and wear out faster. The pneumatic road wheels are, I must admit, a surprise. Do you have a link?
  6. Apparently the British goofed around with interleaved road wheels, albeit because they cloned captured German half-tracks.
  7. Ah, yeah, that's not great metallurgy for tank armor by postwar standards, but it definitely sounds like they had big enough foundries to make the parts. I did not realize that the Czech T-72 turrets were domestically produced!
  8. What was the state of Czech casting foundries at the time? IIRC, the big cat mantlets were the biggest armor castings the Germans could make.
  9. I had heard vaguely that a design concept for the Czech post-war TVP project was mocked up with interleaved road wheels, but that this was rejected. I never saw a picture or anything. So, yeah, a napkin drawing of a napkin drawing, according to rumor. Post-war, most designers seem to have been content with other ways of reducing the MMP of their tanks.
  10. What report is that from? I would be very interested to see the whole thing if you have it. I did find this picture of a TOW missile in flight, you can see it's significantly nose-up: Edit: Derp, I just posted the same picture you found.
  11. If you'd done several seconds of research you would know that this isn't true, and would have avoided looking like an idiot. Do you have a humiliation fetish or something? The additional height of a torsion bar isn't the diameter of the torsion bar itself. Torsion bars almost never touch the floor of the hull. It's almost like they need big bearings for the swing arms or something. Again, you need only have taken several seconds to ascertain whether this was true or not. For the love of Robert Hooke, that's not what "strain" means.
  12. A patent that looks like it might be for the SU-57 air intake: https://patents.google.com/patent/RU2460892C1/ru Very interesting shock wave geometry.
  13. You categorically do not understand what you're talking about. That's not the theory at all. I'm slightly curious if you read this nonsense somewhere or came up with it on your own, but only slightly curious, so please don't belabor me with a large amount of detail. Having more points of articulation on a suspension does not affect the force experienced by the chassis or crew. When the tank is at rest the road wheels will exert the tank's weight against the ground via the suspension springs. When the tank is going over an obstacle, the vertical component of the acceleration
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