> The fact that Bismarck's vertical protection scheme was deemed to be technically proof against almost any battleship gun afloat at any range in terms of a projectile piercing and reaching her vitals at short ranges suggests that perhaps USN designers were on the right track. In the event, the performance of the US 2700lb AP projectile versus the horizontal protection of Jean Bart and against general protection schemes of the older Kirishima, Yamashiro and Fuso suggest that the trade-off paid off for the USN in WW2.
Strictly my opinion, of course.
Thorsten Wahl wrote: "Bismarck. Sum of nominal armour plate thicknesses over magazines was 160 mm."
then a design favoring best performance against horizontal armor versus vertical armor made some sense.
Billy wrote:The 2700 lb'er needs 94% of the velocity of the 2100 lb shell for the same penetration despite the much greater momentum. So therefore for the same charge the lighter shell will have quite a large margin not just in velocity but in penetrion too.
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