Air Resistance of a Bullet in Flight
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Air Resistance of a Bullet in Flight

Air Resistance of a Bullet in Flight




      

Air Resistance of a Bullet in Flight


Air Resistance of a Bullet in Flight

The resistance of the air depends on the speed of the bullet, and since the bullet is moving at a low velocity just after the cartridge explodes, and since the butt of the gun is resting against your shoulder, it is the bullet that leaves the gun and not the gun that leaves the bullet.

After the bullet has left the muzzle of the gun the gases rush out, but these are met and opposed by the resistance of the air just as the bullet was before it, so that, though it may seem strange on first thought, the gun really acts as if the gases were rushing into the barrel instead. Hence the gun does not recoil, and the kick is not felt until after the bullet has left the muzzle.

Another and more simple reason why the bullet leaves the gun instead of the gun leaving the bullet, is that it takes a longer time to move the heavy gun from its position of rest than it takes to move the lighter bullet.

In auto-loading guns hardly any kick reaches the shoulder, for the energy of the recoil is made to do useful work in reloading the gun.

The blast, as the rush of the gases out of the barrel is commonly called, also has a direct effect on the velocity of the bullet. It has been shown by experiment that the instant after the bullet has left the barrel the blast increases its velocity in the neighborhood of 20 feet per second.

The jump of a rifle is often the cause of an otherwise good shot making a poor target. This results from the uneven expansion of the barrel due to the heat of the explosion and the quick passage of the bullet through the barrel.

Because of this jump rifles shooting black powder usually shoot a little lower than where they are aimed and those shooting smokeless powder shoot a little higher than where they are aimed.

Collins, A. Frederick. Shooting, for Boys,. New York: Moffat, Yard and, 1917. Print.

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