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Sturgeon's House

Collimatrix

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Collimatrix last won the day on July 29

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About Collimatrix

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  1. Are there any pictures of the coolant lines that take the engine heat from the front mounted engine to the rear-mounted radiator?
  2. And the K21 that the Redback is based on is also advertised as resisting "30mm APDS" from the front, despite that arguably not being a particularly common threat in world arsenals these days. But who knows, maybe that's what the North Koreans are still using.
  3. I haven't done the extensive modelling Sturgeon has, but, to a reasonable first approximation: -Most new rifles these days are multi-lug, rotary bolt types -There's a practical limit on how many lugs the bolt's locking area can be divided into -There's a practical limit on how steep the cam track can be before the action of locking the bolt makes too much friction -Therefore there is a practical limit on how much the length needed for the bolt carrier to lock and unlock the bolt can be minimized
  4. I've been having a good time with the Knife Steel Nerds blog. It's a good balance of accessible and technical for me. The author just wrote a book, which I have purchased but not read. Obviously, it's aimed at knifemakers, but it goes enough into the basic theory of steel that it works for general metallurgy.
  5. 2020 Update: 2019 and 2020 have proven to be turbulent years for computer hardware development. Since I last posted in this thread, there have been several significant developments. 1) AMD's Navi 2, Ryzen 3000 series 7nm CPUs came out in Summer of 2019, and matched Intel CPUs in all but a few, extremely single-threaded benchmarks: The 3000 series sold more than anticipated, with significant price scalping occurring. The AMD 5000 series GPUs, based on the new RDNA architecture came out as well. They were... OK, I guess. Several of the mid and low
  6. If you would like to learn more about steel microstructures and phase changes, you should find an an actual textbook that wasn't written by someone who was strung out on heroin, unlike this one.
  7. I have learned enough about ferrous metallurgy to contribute to this discussion. Sooooo... Bainite itself isn't brittle. Bainite itself is fairly tough, but less hard than the more typical tempered martensitic steels used for armor. However, a funny thing can happen during the formation of bainite. Bainite doesn't just form; it grows within and eventually replaces crystals of a phase called austenite, like so: This is done during a special heat treating process called austempering. Compared to other heat treatment processes, austempering is fairly slow, but it also
  8. I haven't logged into your account and posted as you a long account of being sexually attracted to little boys and then banned you for it. This would suggest that some of my anger issues have been mitigated by the regimen of powerful schedule III drugs I have been taking off-label for several months. Congratulations on the successful outcome of this test. The reason we're treating what you're saying as laughable and obvious nonsense is because it is. It doesn't help that, when I very gently (by my standards) point out what's wrong with it, you just make shit up.
  9. So, even assuming that the trunnion to the rear of the magazine well is the primary limitation of the size of cartridge a rifle can handle, why do you think that two milimeters is going to make all the difference? Look carefully at this comparison of a SCAR-L with a SCAR-H.
  10. And what result do you get if you use the same measurement methodology with a picture of a Bren 2?
  11. Could you show us these measurements?
  12. FWIW, the Rolls Royce Wankel Diesel was actually built. There were, as I mentioned, a few others.
  13. OK, I have a question for true grognards. Were the HE, smoke and other ancillary rounds for the F1 105mm unique to that gun? It occurs to me that with its unique rifling twist rate, the possible L/D ratios for spin-stabilized shells would be much less than for the otherwise ballistically identical L7.
  14. Judges' remarks: Unfinished Designs: Object 138: Object 426: Bonus panel of the judges politely discussing the finer points of armored fighting vehicle powertrain design:
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