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Submarine video

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  • Member since
    April 2023
  • From: New mexico
Submarine video
Posted by John3M on Saturday, September 2, 2023 7:58 AM

I have a small collection of books on ww2 ships an submarines i found this video enlightening i would like opinions on its authenticity i learned a little i never knew. I was looking for the correct area to post this since i thought it should be under boats but i stand corrected 

https://youtu.be/FctRpaleRFc?si=1iHeh6U1xqCCbl6j

 

  • Member since
    July 2003
  • From: On my kitchen counter top somewhere in central North Carolina.
Posted by disastermaster on Saturday, September 2, 2023 5:26 PM

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.

Incorrect

 https://i.imgur.com/LjRRaV1.png

 

 

 
  • Member since
    April 2023
  • From: New mexico
Posted by John3M on Saturday, September 2, 2023 5:57 PM

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

  • Member since
    July 2003
  • From: On my kitchen counter top somewhere in central North Carolina.
Posted by disastermaster on Saturday, September 2, 2023 6:38 PM

John3M

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

 

 

 https://i.imgur.com/LjRRaV1.png

 

 

 
  • Member since
    November 2005
  • From: Formerly Bryan, now Arlington, Texas
Posted by CapnMac82 on Sunday, September 3, 2023 12:09 PM

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. 

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