Rudder kick up tension :: Catamaran Sailboats at TheBeachcats.com

Rudder kick up tension

lucydog11

Rank: Lubber

Registered: Jul 08, 2013

Last visit: Jul 02, 2014

Posts: 9
Posted: Aug 07, 2013 - 05:09 AM

Hi,

I have 1984 Hobie with rudder upgrade. One rudder kicks up at speed. I tightened adjusting screw all the way down and replaced the spring. The black plastic cam does not show signs of wear compared to the other one and the aluminum adjusting piece is in the same position as the other one. Any suggestions?

Lucydog11
HULLFLYER

Rank: Mate

Registered: Aug 06, 2004

Last visit: Oct 20, 2024

Posts: 878
Posted: Aug 07, 2013 - 07:17 AM

Possibly hole alignment in the rudders, did you re drill after the adjustable rudder castings were installed. The holes are slightly different.
DamonLinkous

Rank: Administrator

Registered: Jul 19, 2001

Last visit: Oct 31, 2024

Posts: 3445
Posted: Aug 07, 2013 - 01:01 PM

lucydog11Hi,

I have 1984 Hobie with rudder upgrade.

lucydog11, just to be sure, which model are we talking about? Hobie 16 or 18? If it's an 18 did you buy and install the whole upgrade kit from Hobie or piece it together?

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Damon Linkous
1992 Hobie 18
Memphis, TN

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lucydog11

Rank: Lubber

Registered: Jul 08, 2013

Last visit: Jul 02, 2014

Posts: 9
Posted: Aug 07, 2013 - 02:39 PM

Thanks,

It is an 18. I did not install the upgrade. The rudders are black and only have one set of holes in them. I wrote the post after screwing the adjusting the delrin screw all the way in, one rudder still seemed to kick up easier than the other when I tested it manually in my garage. However I have just done the tension test with a scale and one kicks up at 22 lbs. and the other at 18 lbs. so by dialing the delrin screw all the way in, I may have improved it but I don't have the original reference point to compare to unless I unwind the delrin screw and re-test with the scale or do an in water sailing test. I also read David Hall's article "Towards the No Slop Rudder" and I will see if any of his suggestions fit. I'm also going to make sure the rudder locking plate is snug against the rudder cam lip. The good rudder has a nice solid click in while the other one is not so much.

Lucydog11
MN3

Rank: Master Chief

Registered: Jun 20, 2006

Last visit: May 22, 2024

Posts: 7089
Posted: Aug 07, 2013 - 05:15 PM

close enough

QuoteHowever I have just done the tension test with a scale and one kicks up at 22 lbs. and the other at 18 lbs.

also silicone spray (lube) is your friend and will make a huge difference with sticking rudders - i spray mine every time i rig