How much larger would a warship become if it adopted turbo-electric propulsion?
Short answerAdd roughly 10-15 percent to the machinery weight, which could translate into several hundred to a few thousand tons depending on the ship.
NotesThe change is an engine-weight calculation. Start with the historical machinery weight and add about 10 to 15 percent, with the exact figure depending on the period. On a large warship that could mean anything from a few hundred tons to the low thousands. This prevents a machinery penalty from being incorrectly applied as a percentage of the whole ship.