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Collimatrix

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Collimatrix last won the day on January 14

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About Collimatrix

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  1. No, Nozh doesn't work as advertised

    I do not think that this video is accurate. For starters, I was under the impression that the nozh linear shaped charges live underneath a thick steel cover plate. The linear shaped charges cutting up and projecting this plate is, as I understood it, the primary mechanism of nozh, not direct interaction of the linear shaped charges and the threat. But more significantly, I don't think that shaped charge liners have enough momentum to carry away fragments of long rod penetrator the way this video shows. 120mm APFSDS rods are on the order of 5 kg and impacting at on the order of 1,500 M/S. Each linear shaped charge is maybe 40mm across, and only about 25mm of the length of the linear jet is going to impact the LRP because the LRPs are only about 25mm in diameter. The copper liner of each linear shaped charge is maybe 5mm thick. So, per that video, we have five 25x40x5mm patches of copper impacting the front 2/3 of a 120mm LRP. So that's about 225 grams of copper smacking about 3300 grams of tungsten. And in the video the linear shaped charges are just batting that LRP aside like it's nothing, so the vector sum of the momentum of the LRP and the linear shaped charge has to be dominated by the momentum of the linear shaped charge. But that LRP is moving forward at north of mach 4, and the portion of the LRP being hit by the linear shaped charge has an order of magnitude more mass! Do you see where I am going with this? The tips of conical shaped charge jets can move an order of magnitude faster than LRPs, but the average liner velocity is much less impressive. Furthermore, a linear charge like this with a hemispherical liner cross-section isn't going to go anything like that fast. There just isn't enough momentum for nozh to possibly work the way this video shows, unless of course the enemy helpfully shoots at Oplot BMs with aluminum darts that move slowly.
  2. The Committee to Protect Journalists has awarded Trump the Overall Achievement in Undermining Global Press Freedom award! SUCK. IT. ERDOGAN. Trump has more power to oppress journalists in his tweetin' thumbs than your entire army of thugs does! Trump has crippled press freedom more by calling them "fake news" than you have by actually throwing journalists in jail on terrorism charges! You spend nights awake trying to think of ways to make your country a police state, and Trump does it without even trying! Remove Erdogan, you are the worst Turk! Long live Kurdistan! Houthis will take Istanbul!
  3. THE MAUSER RIFLE IS A TESTAMENT TO THE EUROPEAN CIVILIZATION THAT WENT BEFORE US, AND TO DESECRATE IT IS TO DESECRATE ALL THAT IS GOOD AND HOLY AND PURE. PRAISE SATAN AND ALL THAT JAZZ AND STUFF. YOU SHOULD ALSO DONATE ON MY PATREON.
  4. 11 Saudi princes arrested for protesting austerity measures.
  5. The plot thickens! Ancient DNA Reveals a Completely Unknown Population of Native Americans
  6. Syrian conflict.

    Fair point.
  7. Iran Producing Glocks/Importing?

    Welcome to SH Silah Report! Could this be the same Glock or Glock clone that was spotted in 2015?
  8. Bash the F-35 thred.

    Really? I quite like a lot of the work they've done. They seem like interested amateurs who are trying to learn and communicate what they've learned. I'm curious what your objections are.
  9. A rail line to Afghanistan through Uzbekistan is opening soon, meaning that US forces in Afghanistan will no longer be dependent on logistics flowing through Pakistan. That means it's time for the first Presidential shitpost of 2018!
  10. Weapons Promotional Videos

    It's already gone. What was it?
  11. Syrian conflict.

    Is the Syrian Civil War the first time that strategic bombing (methodical destruction of ISIS oil infratstructure) has been used since the Vietnam War?
  12. I'm not exactly well-versed in jet engine mechanics, but from what I've read the designers put a lot of effort into matching the thermal expansion rates of the blades and the casing to prevent tip losses. Also, they need to be very careful to design the compressor airfoils such that minor dings and scratches, and any blending used to buff those out, cannot cause compressor blade stall. The idea of ablative thermal coating seems... not exactly compatible with the above.
  13. Forum Improvements and Changelog

    December 27, 2017 Updated some of the Aerospace section links. Got rid of some old blogs that weren't updated anymore, added some fresh new ones.
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