using spaceships for battletech-style tactical mecha combat

[Rupert]

Originally Posted by ericthered

How many armor systems did you use? what values where you expecting?

Eight armour systems, as 40% of displacement as armour was fairly typical of a battleship. I assumed three would be spread over the hull as plating and light splinter protection. I assumed that the other five would be the side and deck armour, and cover about 2/3rds of the ship's length. The sides and ends would be three times thicker than the deck, and the bottom of the ship would have no armour other than the plating.

This gave just 1.4n inches for the 'unarmoured' ends and the bottom, about 4.7 inches for the deck, and a little over 11 inches for the sides and fore and aft bulkheads. This was without counting the x1.4 multiplier Pyramid 3/24 would give.

For a 30,000 tons full load battleship (which means a WWII superdreadnought) this is very roughly right but including the x1.4 multiplier, which it should get (cruisers of the period of under half the displacement were often almost as big as battleships, simply because they carrier so much less armour), this becomes far too much.