[DRG]

Have you tried our ArmourCalc.exe ? It's been in the main game directory for over a decade. Enter the armour and the angle and press " Calculate" be careful about reading results...."0" degrees and 90 are one in the same....both indicate a flat plate straight on in some penetration date descriptions but for ArmourCalc 0 is a flat plate

That isn't quite what you wanted but it can be used to compare data you may have...100mm of armour @ 30 degrees = 115mm