That is sort of calculation I name „creative counting”
Call whatever you want, but you are not arguing with me. You are arguing with scientists and engineers from Krupp and the Kriegsmarine,
As should be obvious for everyone English is not my primary language, so possibly I misunderstand something.
If I take it correct than German Krupp scientists show counting such way that:
Bismarck deck(s) were 130 to 150 mm thick
KGV/Vanguard decks were 127 to 150 mm thick
Iowa 140 mm thick and so on.
So it seems that
1. For Bismarck both weather deck and main deck should be just added
2. For British ships only single deck armour should be used, and all other decks omitted (so no backing, no weather deck)
3. For US ships armour and backing had to be simply added, and rest ommitted.
M I right, or I simply don’t understand something?
Or that sort of counting was not “German Krupp scientists” or some mistake done by someone else and repeated so many times, that some of us don’t even look at those figures?
Or something else?
who understood this far better than any of us.
But they were not alone in the world. Strange that all other scientists abandoned multi deck protection (commonly used in WWI era and before, to be honest later than single deck protection)
Only Germans were right? Or simply done nothing between the wars due to political limitations, and rest of the world simply made studies about battleship construction?
Or another possibility – simply had different priorities than others, so something was better for them, not “universally better”?
However, they also reported that a spaced array could match or exceed the sum total of the armoured plates if certain design conditions are featured. Among those conditions are that it should be in most cases only two plates of armour grade material (not construction steel),
What is “construction steel” what is not is not so simple.
Example – Americans designed its STS steel for both construction and protection purposes. Sometimes even the same plate could be counted both as protection and constuction (part of it as “armour” part as “construction”)
After its success, and knowledge about such steel, British designed they Ducol steel for exactly the same purpose, and was very similar in parameters.
British not added this to protection for simple reason - they choose "worst case scenario". So calculated deck armour only, and knew that in real world such deck should perform better, as there is backing, and other decks abowe.
Different fleets had different metodology of calculation. Nothing wrong in it as long as we are aware of it and with "cross country evaluation" use the same criteria for all ships.