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PostPosted: Tue Aug 28, 2012 5:02 pm 
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The threader brass nut on the fins. What is the purpose for this nut (IS IT FOR A ADJUSTMENT) and if it is does anybody adjust it and if you do for what purpose.


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PostPosted: Tue Aug 28, 2012 5:34 pm 
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Try this: http://www.hobiecat.com/forums/viewtopic.php?f=60&t=12578

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Last edited by KayakingBob on Fri Aug 31, 2012 5:54 pm, edited 1 time in total.

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PostPosted: Fri Aug 31, 2012 5:31 pm 
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sorry for reasking but is this adjustment for anything


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PostPosted: Fri Aug 31, 2012 5:55 pm 
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If you click on the link I posted above (now fixed) it will bring you to a forum post by Roadrunner completely explaining what it is, and how to adjust it.

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PostPosted: Fri Aug 31, 2012 10:46 pm 
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KayakingBob wrote:
If you click on the link I posted above (now fixed) it will bring you to a forum post by Roadrunner completely explaining what it is, and how to adjust it.

I looked at that link and did not see anything explaining the brass adjustment nut and how to properly determine the settings.


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PostPosted: Fri Aug 31, 2012 11:16 pm 
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You're right! not all the detail I thought was there. Try this one: http://www.hobiecat.com/forums/viewtopic.php?f=11&t=17027
The first post with a picture should do it. :)

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PostPosted: Sun Sep 02, 2012 8:34 am 
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I also have that annoying "click." I read somewhere that adjusting that brass nut so the trailing edge of the fin is just barely inside the groove gives better performance. Don't know if that's true, but that's when the clicking started.

I think I'll go play with my clew outhaul. (Sounds a bit risque, doesn't it?)

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PostPosted: Sun Sep 02, 2012 8:45 am 
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The fins are like reversible propeller blades; these nuts allow you to adjust the twist rate (on the ST and Turbofins). For best performance, nuts should be adjusted so the fins are "loose", allowing them to twist easily and wind up the mast without restriction. They should tuck in to the "clew outhaul" slightly (about 1/8") and look something like this:
Image

As the fins are drawn up tighter, they become stiffer, pedaling effort increases and more "thrust" goes out the sides rather than the rear. It becomes more like batting boards back and forth. If your fin instructions from Hobie say something about tightening the nuts for higher speeds, this should be ignored.

If using the older style Drive, look for at least 1/4" free movement space for the fins toslide up and down the mast. 8)


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PostPosted: Sun Sep 02, 2012 3:25 pm 
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Yup. I get the concept: It's like going to fine pitch on your prop for takeoff versus for cruise in an aircraft.

The last picture is just how I have mine adjusted - and get the click. I may still play with it a bit to see what the best compromise is. Thanks a lot.

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