Hi Guys, hope someone can help with this problem -
I am building St Columba a Sealink car ferry - pictures and info can be found on my web site (see sig)
The problem I have is that she won't sail in a straight line. She 'wanders' to both port and starboard indiscriminately.
She has twin motors (identical), twin rudders and a bow rudder (which has little effect when sailing). She continues to turn after the rudders have been centered. She sails straight and true in reverse. I have added bilge keels but, apart from preventing roll, this has not corrected the problem.
Can anyone suggest what may be causing this and how to correct it.
Thanks for any assistance you can give me.
Scottie