I find it weird that earlier and later versions will have thicker wall considering the hull was left with almost no changes between the different variants.
Yes exactly my issue here… It seems that a 35mm shieldwall after everything produces less spall since there is less residual penetration left in the penetrator, but for the mark 3, since the wall is too thin (but not enough unlike some light vehicles) it produces significantly more spall than it should be…
But just to note: Most vehicles with engine wall gets showered with spall post successful penetration…
AFAIK armor thickness doesn’t matter for spall creation, so whether its 10 or 100mm it will create the same amount of spall, as its tied to projectile itself.
You would need something like 5mm sheet to not create secondary spall with it, while it would be able to absorb most of the spall from previous penetration.