exactly! I have no clue as to how "strong" a torpedo should be in the game, but reading about how many it took to sink the Yamato and Musashi - From
The Death of the Battleship:
On October 24, 1944, the Musashi was sunk during this battle by 17 bomb strikes and 19 torpedo strikes
The world’s largest and most powerful battleship was destroyed in less than two hours by an unknown number of bombs and torpedoes. (pb: at least 8)
Of course, the battleship "died" at Pearl Harbor. The CV may not be too far behind it now... but anyway, it took a lot to sink a battleship.
So, why did the Shinano go down with only four hits, having been built on a Yamato Class hull, you might ask? (from
The Sinking of the Shinano):
The Shinano had been built with what were thought to be torpedo-proof blisters of armor on each side of the ship. Much of the ship had four-inch steel plating reinforced with three feet of concrete. But because Captain Enright set the torpedoes to run at 10 feet rather than deeper, they hit above the protective armor.