Exact formula for AP penetration?

[Jeff Duquette]

Hey Rexford:

Haven’t seen any posts from you in awhile…good to see you back. Have you sequestered a publisher yet for your booklet?

[Guest Big Time Software]

Robert Livingston and Lorrin Bird are given credits in the currently shipping CM manual (we just did a reprint and corrected that oversight).

Charles

[This message has been edited by Big Time Software (edited 03-03-2001).]

[rexford]

Suggest that Lorrin Bird and Robert Livingston also receive free copies of the game, it was Lorrin Bird who developed the mathematical slope equations.

[rexford]

The booklet that will be available soon will show that Tiger and Panther (non-glacis) armor resistance was the same as American and British penetration test plate, so Allied test penetration of 75mm and 76mm APCBC can be compared to German armor on those tanks.

When 37mm and 40mm American fired at Panther side armor, they penetrate at range predicted from penetration data. Same quality of resistance in both cases means penetration test against "friendly armor test plate" is same as German armor.

American penetration test plate superior to tank armor, which was full of flaws.

When 75mm APCBC was fired at Tiger side 80mm at 100 yards and about 17 degrees, it penetrated at angle and range predicted by U.S. penetration data even though Tiger armor was much harder than test armor.

Since 75 APCBC penetration in CM is about 10% higher than U.S. penetration test result, CM is assuming that German armor is about 10% weaker than U.S. test plate.

Our booklet is based on premise that instead of re-inventing penetration data, we convert armor to same basis as penetration test plate. That assumption, shatter gap and a few other things round out the analysis. British and American test plate resistance about the same.