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Forums28
Topics3,984
Posts19,069
Members1,019
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Most Online238 Feb 9th, 2024
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Re: Weather Helm
[Re: Steve Buzbee]
#7446
06/03/09 01:14 PM
06/03/09 01:14 PM
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Joined: May 2007
Posts: 2,669 Portsmouth, RI
Rhapsody #348
Past J/30 Class President
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Past J/30 Class President
Joined: May 2007
Posts: 2,669
Portsmouth, RI
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Steve's advice is right on. You may want to look through the old thread Mast Set Up/Rig Tension for typical J/30 rig setup and adjustments. I can tell you that on Rhapsody, the rig tune is different for different sails that I own. This is for one design setup, but I think you could use it as a guide then try adjusting the rig tune with your roller furling to see how the performance changes. Record the base conditions, speed, point, etc. for each adjustment, then go with what works best for the conditions.
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Re: Weather Helm
[Re: Rhapsody #348]
#7449
06/03/09 03:14 PM
06/03/09 03:14 PM
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Joined: Apr 2003
Posts: 649 Marblehead, MA
dbows
Senior Member
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Senior Member
Joined: Apr 2003
Posts: 649
Marblehead, MA
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Rig rake is key to weather helm (where the mast but sets). Once you get this correct and the rig the right tension it should be well balanced with a slight bit of helm when close hauled. If you get this right and there is still helm then you are not sailing high enough. If you are cracked off slightly and let the boat heal too much the helm will really load up.
Try sailing just by heel (as Steve says) keep it at 10-13 degrees - if you heel more just head up until it settles down. You can really kick the J/30 into 4th gear when you sail high and flat. When people sail the boat for the first time they really cannot believe the groove the boat will get into at a very high angle and low heel.
David Bows Mallorca - Hull# 397 ~~~~~_/)~_/)~~~~_/)~~~~~~~~~~~~~~~~~~~~~~~~~|~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|~~~~~
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Re: Weather Helm
[Re: Rhapsody #348]
#7455
06/04/09 02:00 PM
06/04/09 02:00 PM
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Joined: Apr 2007
Posts: 493 Chicago, Il. USA
D. Bartley
Governor at Large
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Governor at Large
Joined: Apr 2007
Posts: 493
Chicago, Il. USA
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First off, 3 degrees of weeather helm is not bad at all... most of us rake the rig more to induce weather helm for lightish winds.
Heeling at 30 degrees will produce weather helm. 10-15 degrees of heel is better. ... some suggestions:
- draft location in the jib should be 40-45% or so. If it's aft of 50, that will contribute to heeling. More jib halyard tension.
- Same with main... draft location should be about 45%. Add more main halyard tension if possible.
- Flatten the main ... backstay on tighter (of course this will move draft aft in the main, so you'll need more main halyard).
- Drop the traveler down.
- Get the jib trimmer up on the windward rail.
Dennis Bartley Planxty, s/n 23994 hull 205
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Re: Weather Helm
[Re: Taras]
#7476
06/10/09 05:27 PM
06/10/09 05:27 PM
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Joined: May 2007
Posts: 2,669 Portsmouth, RI
Rhapsody #348
Past J/30 Class President
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Past J/30 Class President
Joined: May 2007
Posts: 2,669
Portsmouth, RI
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See class rules 5.8.2.1 and look at the diagram in figure 1 showing the measurement point. It is 10935 mm (35'10.5")
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