If the propeller has a significant flow over it perpendicular to the thrust it is creating, it will experience a dramatic loss of efficiency.
Now, assuming this isn't modelled in DW, I still don't think that the thrust being generated by the screw is enough to over come the inertia of the submarines...
Do you think that a sub uses it's full rudder deflection at flank as you are ordering your crew to do... I don't think so. :hmm:
However, I will freely admit that we are in "stuff I don't really know jack about" territory.
But everything feels right to me.
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LW
 
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