Pounding Hooking Jib

topcat0399

topcat0399

.
Aug 22, 2011
1,113
MacGregor Venture V224 Cheeseland
So, I have purchased a used 95% hank on Jib sail that is in really nice shape. Looks and feels like new.

Sailing last weekend and using this headsail for the first time I'm surprised at how it acts.

In winds over 20 mph heading up the leech of the sail hooks to windward and the sail sorts of "pounds", at least that's what it sounds like. My old baby bottom soft worn out Jib never did that.

I suspect that it may be because of where the fairleads are located. In the stock location, that are not anywhere near the 8-10 degrees (much more) from center line, and probably too far back. I do not yet have Jib tracks. I tried adjusting the leech line with no improvement. Should I try twings to get the control point in a more appropriate place?

Any comments invited.
 
shemandr

shemandr

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Jan 1, 2006
7,980
Slickcraft 26 Sailfish
I don't understand the term "Pounds." Maybe you can get and post a video clip so we can see and hear what is happening.
By all means try twings (Or things as my spell correct suggests). For an inhauler you can use the lazy jib sheet on a 95% jib. Also a short sheet for the jib lead position. I've used my foot for a temporary "find out what would happen if..." A hooked leech isn't good - all drag, no power.
 
J

JohnShannon

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Jan 4, 2010
1,037
Farr 30 San Francisco
Just a guess, but the sail might have a leech line. This is a small line that runs along the back of the sail and can be used to apply tension. Too much tension and it may hook, too little tension and it may flutter (or pound?). Anyway look at the sail where the jib sheets attach, you might see a small line and a cleat of some kind. If you do fool around with the tension and see what happens.
 
Jackdaw

Jackdaw

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Nov 8, 2010
11,386
Beneteau First 36.7 & 260 Minneapolis MN & Bayfield WI
If the new jib's LP is smaller, the leads will have to move forward. 95% I'm betting it's smaller that stock, and the fixed leads will be an issue. If the leads are too far back, trimming will only pull the foot tight, and the leach will be uncontrolled. The baseline position should have the sheet come to the sail at an angle that if continued would bisect the luff.
 
tjar

tjar

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Aug 8, 2011
166
Hunter Legend 35.5 Tacoma, WA
It may also be due to the fact that the new sail is much more crisp and doesn't stretch when it fills with air. This can feel like pounding if it keeps luffing, possible caused by the jib sheet angle.
 
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