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Old March 10th, 2010, 17:16   #63
Huron
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Join Date: Aug 2008
Location: Toronto, ON
OLD AND WRONG: Just did the math for that ANSI test, and the steel ball should impart a bit under 1.6 joules on the glasses. I used the mass of a 1 inch wide cube of steel though so the energy would be a bit higher than what it actually is. This was assuming the steel was 7.9g/cm^3 and solid. So the energy wasn't much more than a 0.2g BB traveling at around 416ft/s. My math could be way off though.

If I got it right however, I think looking towards a tougher ANSI projectile resistance standard would be advisable.

EDIT: Little late, but just redid the equation on paper today and found out that Google did a really wonky conversion and gave me way too high of a density. I got the same 0.6 joules reported after this post.
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Last edited by Huron; March 11th, 2010 at 22:34..
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