Submarine video

John3M

it would be hard to stear

Not really.  Triple-screw ships all rotat the same direction.  Put two outboard motors on a boat, and they both go the same way.

Now, if you look at a rotating propeller, as very low RPM, the direction the screw is "rolling" in imparted on the vessel. 

So, a single-screw RH prop, will want to "walk" the stern to the right (as observed from behind) when going ahead (this being all at the very edge of forward "bite").

A LH screw will "walk" the other way.  As will a RH screw turning in Reverse.

When backing, the blades are significantly less efficient, so the effect can be more pronounced. 

This becomes a ship-handling skill for getting off--or on--piers & docks. 

John3M

I got that slso with both rotating the same way it would be hard to steer 

 

I got that slso with both rotating the same way it would be hard to stear 

Here'ya go....

First thing I caught.

At point 0:21.... incorrect rotation displayed

From the rear aspect the right one clockwise and the left one left turning counter-clockwise to neutralize the radial spin momentum.

Otherwise, a very informative link. Thanks.

Russian subs..... well, russian subs.... who knows.