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Originally Posted by Yahoshua
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Originally Posted by Antidike
I agree it probably a beretta M92.
The cavitation in the Gelatin was amazing.
I'm afraid I can't accept the stuff about air rushing back into the barrell causing recoil. a) I'm not sure there will be such a hard vacuum left in the barrell and b) the area of the bolt face is so small that the 15 psi of pressure at max won't do much.
That said your explanation makes sense of the muzzle brake/compensator. If you can give me a link to another explanation...please.
I must admit though being English I don't get to see guns that often so I'm working just from physics.
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A. I didn't quite fully explain it...again. When the bullet leaves the barrel, the barrel will spring rearward due to the friction caused by the bullet, the air that rushes into the barrel will merely compound it.
This site explains it better than I can.
http://illumin.usc.edu/article.php?articleID=61&page=2
B. I don't know where you got 15 PSI from, since firearms operate in the thousands of PSI range. For example, SAAMI (Sporting Arms and Manufacturing Institute) rates 9mm at a standard of 35,000 PSI.
http://www.handloads.com/misc/saami.htm
SAAMI website here: http://www.saami.org/ |
Not sure where you are getting friction and rushing air from. Newton's Third Law is all that's needed to explain recoil; the expansive release of energy used to propel a bullet forward also propels a gun backward. Muzzle breaks help this by diverting the energy in a direction other than forward/backward.