If that's the level of understanding of physics encoded into the Elite Dangerous weapon model, that explains so much. ;-)
Seriously. There's absolutely no doubt that a 9mm shot is more fatal to a mouse than to an elephant, to cite your favorite example.
But that's because the animal has more mass and thicker skin - which maps to more hull mass and more armor already. This affects the relative damage to the target. The absolute kinetic impact is the same.
Introducing an additional damage modifier is just sloppy coding. (I'm a programmer. I can hear the conversation in my head - "Hrm, with those weapons and hull and armor weights, this doesn't make sense. Do we recalculate them all or introduce some random modifier?")
Smaller weapons already inflict less absolute damage, they have shorter range, etc.
As for that battleship versus tank equivalent - I really don't think a battleship would like to be hit by even one tank's main gun. Just, you know, saying.
Going back to the topic of this thread though - none of that justifies the damage penalties that turrets get, and how badly they are positioned on the ships.
The Tank's gun will do damage to a battleship, but it will not be enough. A near miss by a 16 inch Naval Gun, such as the one on the IOWA class, will destroy the tank. A direct hit will result in there being nothing more than a crater and scraps of metal.
The level of firepower is so disproportionate here that it is comparable to a soldier with an M-16 being charged at by a caveman with a spork from a mile away
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