Armor - Ballistics

Draschel: Armor rarely is what it is, in these seen and used tests. Case in point, RHMA, rolled homogenous monolithic armor, is a singular fashioned or entirely seamed (not laminated) plate. Rolled homogenous armor, is extremely heavy, and not entirely efficient for its heavy weight. For example, RHMA doesn't protect too well at all,  VS chemical HEAT jet which is ignited then forcefully propelled forward at blazing speed, sheering armor. It doesn't protect too well against physical emanated shock either, like putty HESH detonating causing vibration and inner spall. Simply put, RHMA is old and obsolete, but a good standard. A control, for testing purposes.  M318A1 90mm AP round, pretty common in post war, cold war, nato countries adopting the 90mm gun, could penetrate nearly 200mm RHMA @ 0'' incident angle, @ 25m. While this seems thick, it does not include armor perforation performance against angled targets. Targets with spaced armor profiles, for deflecting/degrading performance. Laminates, for deflecting/degrading performance. And of course ranged degradation, @ 1,500m that 90mm AP shot drops to not even 150mm, losing 1/4 its pen. By the T-62 tank, the Soviets were already incorporating lainates into turret cavity and front upper glacis, bolstering a tanks resilience. That is why the 60s was quick to introduce and up-gun tanks to 105mm and 120mm guns. The 90 was not enough.