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Alphins formula.

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22 May 2003, 18:12
Karl
Alphins formula.
I haven't got the a-square book on me at the moment. What was art alphins formula for his penetration index, or did he not include it?
I can't remember.

Karl.
23 May 2003, 06:31
470 Mbogo
Penetration Index:
"The Penetration Index is calculated by dividing kinetic energy with the area of the bullet and multiplying the resulting quotient by the sectional density."
23 May 2003, 07:26
Art S.
If you simplify the formula, you will find that the fundamental relation is proportional to the momentum divided by the area. The actual numerical value is squared, divided by 2 etc. I suppose this is an improvement on the older momentum theories.
24 May 2003, 02:12
Karl
Thanks gents-I thought it was more complicated than that.

Karl.

[ 05-23-2003, 17:13: Message edited by: Karl ]
25 May 2003, 11:01
<Norbert>
quote:
Originally posted by Art S.:
If you simplify the formula, you will find that the fundamental relation is proportional to the momentum divided by the area.
This number, called "momentum density" is a basic value calculating the penetration of solid materials by warheads etc. including "bazookas" and the like.

For penetration on game see also grosswildjagd.de