posted on Nov, 10 2017 @ 10:33 AM
a reply to: Jandanagger
Orangetom hasnt posted on ats for a long time now.
However in regards to the x shaped rudders on the back of subs in a seperate thread and conversation he went on to explain further.
If you notice some subs have normal + shaped rudder but just forward of them youll see a pair of smaller rudders on 45 degree angles like the ×
This is done for further stability of the submarine when underwater. The × shaped rudders reduce a phenomenon called 'porpoise-ing' a up down
undulation of the sub as it travels. So for those wishing to cut down on that they experiment with × rudders or some combination of.