Remember in all our history books or novels:
when you will have an engagement you bring all boilers in line ("Destroyer Command") and yes, the acceleration values are crazy, I hate a ship going at 12 knots slowing to 7 knots in a length or more (no inertia?) and torps passing in front of the target missing by a whisker.
anyone has a copy of Janes Warships of WW2?
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Originally Posted by tater
I think that is way too fast. The screw count is wrong, too, big, slow props are more efficient. Iowa tried to keep her turns at no more than 200.
0-20 knots needs to take minutes.
Stopping a ship like Iowa is easier than most ww2 BBs because of electric drive. None the less, throwing her all back from 30 knots took over a mile to slow her. (~7 ship lengths). She could stop faster with a "barn door" stop (they could turn her rudders into each other to make a wall—Wisconsin did this once, and suffered for it thereafter, apparently). I have no timing on this, but starting with ~30 knots, that means ~4 minutes to stop.
Stopping should be faster because you also have drag working for you which goes like v^2.
Less advanced designs would have been slower stopping (and accelerating).
IMO, that means the boundary value would be a ship capable of accelerating as fast as she could stop, and that might be 4 minutes from 30 knots—and with an electric drive, reverse was just flipping a switch, you cannot do this as easily with a direct drive.
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