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Old January 22, 2013, 08:49 PM   #26
Bart B.
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Scorch comments on Anschutz rimfire barrels going from short to long:

Quote:
With match rifles that use iron sights, it is a sight radius issue, the longer sight radius gives better accuracy. In a match, that is important.
True, but their short barreled versions had a long bloop tube on them so the sight radius was the same as their long barrel versions. That way, their rear sights would change point of impact the same per click regardless of the barrel configurations used. Here's an Anschutz bloop tube that adds several inches to the sight radius. A slot at its top back end aligns with a pin on top of the barrel behind the muzzle where it clamps on to. It' got a 3/4" diameter hole through it the bullets go through.



I don't think a longer sight radius gives better accuracy as the front sight still wobbles around the target the same amount angular wise regardless of sight radius. But the further away the front sight is when one's aiming eye is focusing on it, the sharper the target will appear.
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Last edited by Bart B.; January 22, 2013 at 08:57 PM.
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Old January 22, 2013, 09:16 PM   #27
B.L.E.
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Quote:
The force exerted by a spring is expressed as:

F=-kx

where F is the force, x is how far it's stretched and k is the spring rate, or spring constant.

The potential energy of a spring looks suspiciously like the standard Kinetic Energy formula:

PE=1/2kx^2
Since most hammer springs have some preload in the hammer down position, the formula should be.

PE= 1/2k(x1^2-x0^2) or the potential energy of the spring in the cocked position minus the potential energy of the spring in the uncocked position.

The formula should look suspiciously like the KE formula since they both describe a function that looks suspiciously like the area of a triangle.
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