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Originally Posted by crazeazn mmm somebody correct me if i'm wrong... if 3 rounds can do that, what would 10 rounds do? If i'm a baddy, I'm pretty sure ill get a few more hits than just 3. |
The professor of my polymers class this past fall works on all kinds of various transparent energy dissipating "plastomers".
Scroll on down to the bottom of the page on this link, and you can see one of his pieces of work. His office is filled with test pieces from the DoD. Pretty cool stuff.
http://www.txstate.edu/chemistry/res...interests.html
You'll notice the shots in the video only affected the exterior layers of the "window". It's not a window by any stretch of the imagination, but a series of layers of possibly polyacrylates, polyacrylics, polycarbonates, and who knows what all else processed and cured at angles to each other to make it stronger. It's like plywood in a sense. The direction of the grain of each sandwiched section runs at 90 degrees to the layer above it so that it doesn't want to bend any direction. Added strength by varied geometry.
Same thing with the plastics, BUT the kicker is that you can have a layer that isn't flat so to speak but actually stands up. Sort of like sawing off the ends of thousands of straws and packing them in there, then you vacuum seal another type of polymer inside the cells.
Back to the video, the rounds have no effect on the back of the window. That means shots are going to have to be within the cratering region of the first shots impacting the window to damage the layers below. Secondarily, the top layer's fragments still are absorbing impact energy. Now try to put those extra shots onto the same spot, on a moving target. Even with a fully auto AK unless you're using drum mags you're going to run out of lead before puncturing the window as shown in the video.
Solution? One of my bucket list babies:
Barrett
The Barrett M82, in .50 please.
They actually experimented with the same rifle in a 20mm caliber. No bueno for the shoulder so they scrapped it.