Detailed examples of Pen/Arm combat calculations

[Champagne]

Aw, Nuts, Andy. I can't figure out how to use the AP Calculator and the Armor Calculator to calculate anything. Are there any instructions somewhere?

Here's what I figured out so far: the British 2 pdr gun firing AP at 500 meters has a Pen value of 5.

For Armor Calculator: Armor of 100mm at an angle/slope of 45 degrees resists hits the same as 141mm at zero degrees slope/angle.

Is there more to it than this? I suspect I've missed something. Thanks for the help.