Quote Originally Posted by jerby
my guess is that charge-bonus is a bonus to attack-power when charging. i guess penetration-power of a charge is then measured by mass(or defense..)
That is essentially how it was intended, but charge bonus is not added properly to the attack value. At extreme values, like in your test, you do see a difference, but in the game the effect of charge is almost negligable. Charging power is determined by the armour value. They discovered it in this thread: I bet you don't believe this: cavalry charge is broken.