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What on earth is wrong with this Large Rudder on my ship.

So ... I've been building a destroyer with a friend and I decided to try giving it a large rudder.

It works ... Very strangely.

It actually turns great and I love the idea, but anytime I try to turn the ship it basically lists 60 degrees away from the direction I'm trying to turn it. For obvious reasons, this is a big problem!
Usually this behavior would result from the rudder being vertically out of line with the center of mass, above. This is not true of this - I've tried many different rudder shapes and moved the spin block up and down to see if that's the problem and it reliably causes the ship to flop over away from the direction of turning. (Unless I extend the rudder far below the plane of the ship, in which case it jitters wildly instead.) Help, please?

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What on earth is wrong with this Large Rudder on my ship. - by BioPhoenix - 2018-11-08, 04:37 AM

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