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- From: weed@sweetpea.jsc.nasa.gov (daniel weed 283-4162)
- Newsgroups: rec.guns
- Subject: Re: Recoil Formula
- Message-ID: <9301261811.AA11040@sweetpea.jsc.nasa.gov>
- Date: 27 Jan 93 03:37:24 GMT
- Sender: magnum@mimsy.umd.edu
- Lines: 42
- Approved: gun-control@cs.umd.edu
-
-
-
- #
- # Well, I misplaced the formula for recoil and the boy wants a
- # Remington 7mm Magnum. Although I'd kinda like to have one, I'm semi-
- # half-heartedly trying to talk him into a .270. I don't have anything in
- # comparable recoil except maybe an 870 3" mag. If someone could email the
- # formula for recoil I would appreciate it.
-
-
- Bobby,
-
- 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
-
-
-
- ----------------------------------------------------------------------------
- Daniel Weed weed@sweetpea.jsc.nasa.gov
- McDonnell Douglas Space Systems Co. - Houston
- "My comments are my own, not my employer's"
-
-
-