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PostPosted: Fri Dec 12, 2014 9:28 am 
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Joined: Tue Oct 21, 2014 12:58 pm
Posts: 3
Hi Guys,

I bought a Hobie 21 SC about 4 weeks ago. I have extensive cat sailing experience from my younger days. I'm 59 now. When sailing this boat I am getting a lee helm on the starboard tack, ranging from light to heavy, and then a weather helm on Port. I have adjusted the toe and rake on the rudders to factory specs. The weather helm on port tack is not bad but the lee helm on starboard is a little unnerving when you let go of the tiller and the boat turns down wind on it own. I have never sailed a boat with a different helm on each tack. Anyone else every have this problem and how did you solve it?

Thanks, John

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John and Peter Costanza
Palm Harbor, FL


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PostPosted: Fri Dec 12, 2014 10:26 am 
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Joined: Mon Jul 04, 2005 10:13 am
Posts: 720
Location: Nepean S.C. Ottawa, Canada
1. check shroud lengths are the same, and are 'set' the same.
2. check rudder toe in
3. check boat is square (bow of port full to stern of starboard hull, and visa versa)
4. check daggers or centreboards are descending 'straight'
5. check all controls (e.g. mast rotator) are set symmetrically.

anyone add anything else?

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1989 Hobie SX18 Sail # 1947
'Only two things are infinite, the universe, and human stupidity. But I'm not sure about the former.'


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PostPosted: Fri Dec 12, 2014 10:41 am 
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Joined: Tue May 27, 2003 12:44 pm
Posts: 9328
Location: Oceanside, California
Check rudders for warp. This happened on some Wave / Getaway rudders a number of years ago. If you replaced rudders in that period... maybe they are hooked to one side.

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Matt Miller
Director of Parts and Accessory Sales
Hobie Cat USA


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PostPosted: Sat Dec 13, 2014 7:27 am 
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Joined: Tue Jul 01, 2014 7:39 pm
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Location: Indianapolis, IN
Hi John,

Both rudders were replaced Feb/Mar 2009 with new ones purchased from the Indianapolis dealer, Sailboats, Inc.

I had not experienced weather on one tack while lee on the other. The boat only was used a couple outings a year recently and I remember two outings ago it seemed to have a little weather helm on one tack and a lot of weather helm on the other. During the last trip I thought about making adjustments to improve this, but not until we were already at the gulf and without proper measuring tools, etc., and not remembering which tack had the heavier helm. Ultimately, before launching we made a slight increase to the rudder rake on both but don't really know what the result was since we didn't really have strong winds the entire trip. We had maybe 12 MPH wind max during the 4 or 5 days and I didn't notice anything uncomfortable or disturbing with that wind level. I had not really considered anything significant going on, assuming some minor adjustment needing correction.

If the rudders do have a warp I suppose the only real solution is to replace them. If they do, I am wondering 2 things: Since this was a known issue with either design or manufacturing, would Hobie consider helping you out somehow? And, in the meantime, after checking everything else too, if you are feeling some lee helm on one tack, could it be improved by identifying the offending rudder and reducing rake on that one rudder?

If you want to discuss further, feel free to give me a call/text/email. Otherwise, I hope you are enjoying the boat.

Regards,

Eric

PS. I am working on changing my user name but haven't figured out how just yet.


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PostPosted: Sat Dec 13, 2014 1:15 pm 
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Joined: Tue Oct 21, 2014 12:58 pm
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Thanks for all the good ideas. I will check everything recommended, sail the boat and get back to you.

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John and Peter Costanza
Palm Harbor, FL


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PostPosted: Sat Dec 20, 2014 9:02 am 
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Joined: Tue Oct 21, 2014 12:58 pm
Posts: 3
After trying the many suggestions and then talking to Matt Miller from Hobie, who was a wealth of information and experience, my brother Peter and I checked the rudder blades for foil symmetry on each side of the blades. We discovered that the starboard side of each rudder blade was deformed,sunken, and not properly foiled like the port side. So this seems to account for the fact that we have a lee helm when sailing on a starboard tack and a weather helm when sail on a port tack. Since this was a manufacturing defect we are hoping that Hobie will help out with the replacement. At any rate it is quite gratifying to find what appears to be the problem after scratch our heads for so long. Thank for all the help everyone. I will let you know what happens when we replace the rudders.

Happy sail and greeting from Florida.

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John and Peter Costanza
Palm Harbor, FL


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