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- From: mfolenta@pica.army.mil
- Newsgroups: rec.guns
- Subject: Re: Recoil Formula
- Message-ID: <9301271855.aa12308@claudius.pica.army.mil>
- Date: 28 Jan 93 04:17:05 GMT
- Sender: magnum@mimsy.umd.edu
- Lines: 43
- Approved: gun-control@cs.umd.edu
-
- In article < weed@sweetpea.jsc.nasa.gov> daniel weed wrote:
-
- #
- # You'll probably get a bunch of different ways to measure recoil.
- # I think the best mathematical way is this:
- #
- # Take the muzzle velocity of the bullet times the bullet weight, then
- # divide that by the weight of the gun. Be sure the weight of the gun
- # and of the bullet are in the same units, either pounds or grains
- # (7000 grains = 1 pound).
- #
- # The result is a velocity, in feet per second, called the Recoil Velocity.
- # If you were to suspend your rifle on the end of a long wire, like a
- # pendulum, then remotely fired the gun, the bullet would go one way, the
- # rifle would go the other, and what you have calculated is the velocity the
- # rifle would attain. (this has actually been done).
- #
- # This of course, ignores many factors that affect _perceived_ recoil, such
- # as moving internal parts, the length of time over which the impulse
- # occurs, butt padding, sound, etc. But it does provide a fairly good
- # relative measure of recoil. It takes into account both the bullet
- # energy and the weight of the gun.
- #
- # -- Dan
-
- Not a bad way to approximate the effect of the recoil, but you really
- should include the mass/weight of the powder charge. It adds a significant
- effect to the recoil (more powder, even at the same muzzle velocity, means
- more recoil _usually_).
-
- This approximation does ignore the "jet effect" of the propellent gases
- squirting out of the end of the barrel (and the counter-effect of a muzzle
- brake or compensator).
-
- And the perceived recoil can vary quite a bit!!
-
-
- ***** These are my opinions. Get your own. :-) *****
- Michael Folenta | U.S. Army ARDEC
- Future Weapons Branch | Picatinny Arsenal, NJ 07806-5000
- email mfolenta@pica.army.mil | (201) 724-3880 [AV 880-3880]
-
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