>>the hood had armor from 5" thick all the way to being 12" thick.even at 5" thick the hull would be LESS likely to buckle than a 1" hull therefore it would be a safer vessel.PERIOD.<<
John, befor you hit people with these all encompassing "periods" I would strongly suggest that you actually take the time to study and get to know how and why ships of all kinds are built as they are.
Quite a few of the people here have done
exactly that and the body of expertise here includes a metallurgist, professional historians, sailors of every patch from deckplate seamen such as myself to fully licensed ship captains, engineers, and mathmaticians. You might want to think about that befor you try to talk down to anybody here. It won't be kindly recieved and rightly so!
The armour figures you gave for the HMS Hood are for the armour
belt which protects only a limited section of the ship's side from hostile shellfire. the Armoured deck would tend to be low down so as to avoid topweight problems and stil protect the vitals from plunging fire.
The rest of the ship would be unarmoured and plated in normal hull plating no more then an inch thick depending on what the construction specifications called for. In point of fact, there's really no way one can build a ship with extrodinary thicknesses throughout as even if the beast could float, it would take enormous amounts of power just to move it, and there is no way a ship so overweight could ever carry a useful payload.
Now if you want to see the
actual armour specifications for the HMS Hood, then you would do well to click on
This Hotlink. You will see that by no means was the whole hull 5 inches thick.