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Setting up twin rudders

Printed From: Yachts and Yachting Online
Category: Keelboat classes
Forum Name: Technique
Forum Discription: 'How to' section for keelboat questions and answers
Printed Date: 20 Aug 22 at 6:31am
Software Version: Web Wiz Forums 9.665y -

Topic: Setting up twin rudders
Posted By: colin brown
Subject: Setting up twin rudders
Date Posted: 27 Mar 22 at 4:20pm
Hi , can anyone suggest the correct way to set up the twin rudders on my Beneteau 21.7? Should they be parallel tp the centre line of the boat , toed in or toed out. I can not find any information at all. Advice please

Colin UYC  Ouch

Colin Brown

Posted By: 423zero
Date Posted: 27 Mar 22 at 7:37pm
Twin rudders are not parallel to the boat's centerline !!!!
Looking from aft , they are watching about 3-5 degrees inboard.
That has nothing to do with the Ackermann-effect .
Sailing upwind the leerudder is angled about 5 degrees ( wheather helm).
The windward rudder, more or less parallel to the waterline , MUST have 0 degrees then, otherwise it would generate horizontal lift, heeling the boat much more. Anon, non attributable unfortunately, checked salient facts appears accurate.


Posted By: Wiclif
Date Posted: 28 Mar 22 at 4:44pm
I was crewing in a catamaran, and the owners way of “tuning”, while sailing,  was to disconnect the adjustable crossbar linking the tillers.  Then adjusting the length so that the crossbar could just drop on.

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