I agree run electric on surface ca n be a tactical advantage.
But I do not understand the advante of run one shaft forward and one back on a sub. They have only to shafts because the engine power of one diesel was "low". If it would such a big point they would not change design to one screw in modern subs, isnt?
Call be dumb but compared to the lenght and mass of a sub the two screws are very close together. Will the water flow not create 90% carvitation and only a 10% turning advantage in trade off a big loss of speed?
..even you will outturn mostly all surface threads with only rudder actions...
I mean isnt it better go as far as possible before these cans detonate?
Ok, you can conserve fuel by running only on one screw...in trade of speed.
Andreas
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