🚀 go-pugleaf

In article <9301261811.AA11040@sweetpea.jsc.nasa.gov> weed@sweetpea.jsc.nasa.gov (daniel weed 283-4162) writes:
#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).

Oops.  Neglects the momentum of the propellant gases, and is therefore
pretty misleading.

#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.

Toby Bradshaw
Department of Biochemistry and College of Forest Resources
University of Washington, Seattle
toby@u.washington.edu

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