Interesting. the Israelis were looking for a cheap way to armor vehicles. They did sheet metal/styrofoam ad infinitum layers...well really only a few layers. Anyway- metal spreads the force over a large area,foam absorbs energy, repeat as necessary. The result was made from two cheap available items and would stop sizable fragments or bullets.
Gotta wonder if the differing wood layers performs likewise.
I am not a techno geek, I just play one on TV.







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