Posted By: DanWard Humming rudders - 07/21/02 02:03 PM
The rudders on my H17 humm at high speed. I have not experienced this on any other catamaran and believe it has to do width (about 1/16") of the trailing edge. Any thoughts?
Posted By: Jake Re: Humming rudders - 07/21/02 03:38 PM
this is a pretty common problem to cats. Perform a search on this forum for humming and you'll find a lot of advice. You are pretty much correct in your guess and while shaving the trailing edge will help, it's more important to chamfer one side slightly more than the other. This creates a tiny imbalance that will keep the rudders from setting up an oscillation.
Posted By: arbo06 Re: Humming rudders - 07/21/02 10:11 PM
What he said..same on 18's, 20's and 21 SE's
Posted By: nacra 269 Re: Humming rudders - 07/23/02 12:27 AM
Is it possible they just don't know the words? Sorry!
Posted By: aus056 Re: Humming rudders - 07/23/02 03:47 AM
try lifting one rudder up