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Rudder Alignment

 
 
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Old 03-11-2008, 01:36 AM   #1
Crglmb
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Join Date: Sep 2005
Location: San Diego
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Rudder Alignment

Need help with rudder alignment, on a 56' Sport yacht, Top speed 35knts.
Are there any marine architect's out there, that have experience in this area.
I have heard so many conflicting opinions toe-in or toe-out? Which is it and why. Thank you.
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Old 03-11-2008, 04:53 PM   #2
CODOG
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Location: Bournemouth, southern England
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What sort of deadrise does she have aft ?
Any sprayrails that run all the way aft to the transom ?
Do you have prop tunnels ?
How far forward from the transom are the rudders....say to the trailing edge ?
What sort of distance do you have from the prop blades to the leading edge of rudder ...say as a fraction of prop diameter ?
Do you have any running trim issues, such as excessively flat, or excessively stern down at speed ?
What sort of rudders are they....totally flat plate, aerofoil section or wedged section ?
Do they have cavitation plates ?

You could see some lift at the stern at speed by toeing the rudders out on leading edges, depending on a few factors, and conversely see the stern sink down slightly at speed by toeing the rudders in on leading edges....Answering the above will allow a more considered answer
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Old 03-11-2008, 09:46 PM   #3
Crglmb
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Have pics of boat out of water

I have some pictures that I can email to you, my email is crglmb@cox.net
Craig
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