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  #1  
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Question In-mast (un-)furling problems

Hi All,

My sailboat (Beneteau 411) has the in-mast furling system.
For some reason, the mainsail jams when being un-furled - see the attached picture.

I am easing boomvang spar tension, topping lift and mainsheet when furling and un-furling the sail - all are slack.

Am I doing something wrong? Any suggestions will be appreciated.

Thanks.
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Re: In-mast (un-)furling problems

One possibility is that the sail is blown out. Too much camber would cause this.
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Re: In-mast (un-)furling problems

Quote:
Originally Posted by eherlihy View Post
One possibility is that the sail is blown out. Too much camber would cause this.
I thought about it too. What is the solution - $500 to sailmaker?
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Re: In-mast (un-)furling problems

The problem may be when you furl the main it's too loose. Some things to try: Use more outhaul pressure. Also, when furling, use a bit of topping lift to raise the boom. As eherlihy points out, the main may be "out of shape". A sailmaker can fix this if the material is still ok.
Good luck.
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Re: In-mast (un-)furling problems

Try $2000...
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Re: In-mast (un-)furling problems

Furling mains jam when the sail is furled incorrectly. A baggy main may exacerbate the problem. As stated previously you need more weight on the outhaul as you furl. Watch the sail as it goes into the mast. If it wrinkles or creases haul it out again and put more weight on the outhaul. Most sails will always furl. The problem arises when you try to unfurl it!

If it's an old sail you have to take more care.

I've furled my sail on most points of sail in varying wind conditions up to over 20 knots. After jamming it once I now take a lot more care and usually head up with the wind slightly on starboard.
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Re: In-mast (un-)furling problems

It appears to be as mentioned above, blown out. We have the same thing and we are trying to get one more season out our sail so we have learned to deal with it. Most important is to keep leach and foot tension even (perhaps raise the boom) and not force things. If it gets caught, stop and roll it in a bit, then, without releasing the outhaul, bring in the sail more, effectively rolling it tighter like you would a chart. Then pull it out again. Often we use the wind to help us, filling the sail with at least 10 knots of wind when bringing it out. We never furl or set the main head to wind.
We did talk to a sailmaker here who said it wouldn't be a big thing to cut out the baggy bit, but our tape drive main is (and always was) garbage, so we want to replace it soon, anyway.
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Re: In-mast (un-)furling problems

Did you ease off back-stay?
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Re: In-mast (un-)furling problems

Thanks all for replies - will try few suggestions.

Yes, the sail is old and stretched, with a notable pocket on the middle.
I was hoping the problem could be alleviated using some furling techniques, but I guess only so much can be done and I would have to learn to live with it...

Quote:
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Did you ease off back-stay?
No, the backstays (2) are fixed (not meant for routine adjustment).
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Re: In-mast (un-)furling problems

ACK!!! THIS IS MY SAIL HERNIA PROBLEM!!

The only way I've been able to solve this is to make sure I furl it properly. Then I unfurl at the dock and refurl it to make sure it doens't give me any issues. Then, when i unfurl at sea, I go up to the mast and ease out the first 3-4 feet of sail...pushing back the hernia if it appears.

My next boat will *NOT* have in-mast furling. This problem has deviled me since the first time I took her out on my own. I furl and unfurl into the wind with no tension on any line. I try to furl with the boom on a bit of starboard to facilitate a tighter wrap. That generally works...but nothing is 100%
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