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Old 05-06-2015, 10:25   #1
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Mainsail cover

Making a new mainsail cover and wondering , loose or tight? The old one is very tight and probably has no ventilation. Loose would flap around in the wind.
Is there a best style?

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Old 05-06-2015, 10:29   #2
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Re: Mainsail cover

I prefer loose as I can always wrap a line around during the windy times.

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Old 05-06-2015, 12:56   #3
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Re: Mainsail cover

Do you have issues with birds nesting in your sail. If so, a tight sail cover may discourage the pesky home makers.
Peter O.
'Ae'a, Pearson 35
'Ms American Pie', Sabre 28 Mark II
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Old 05-06-2015, 13:12   #4
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Re: Mainsail cover

If you're making it from Sunbrella, or other acrylic fabric, I think slightly loose it better. It still will chafe easily. I use old sailcloth on the inside for the main to rub against, so the Sunbrella stays intact.
Who scorns the calm has forgotten the storm.
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Old 05-06-2015, 15:01   #5
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Re: Mainsail cover

Since you are making a new sailcover from scratch, now is the time to modify it to a stack type if you don't have it now. Much easier to use.
Make the stitching so that the sun does not eat up the exposed thread wherever you can.
Also, yes; a bit looser than what you had allows needed air circulation.
If you leave a 4"- 5" flap to overlap the top closure of the cover, over the flaked sail, and add several velcro patches every foot or so along this top flap, or twist snaps or short ties, you won't have to fit a long zipper or pull on it to open or close it and will not have all that sun exposed stitching either.
If you line the inside of the new sailcover with another synthetic material cloth, it also protects the sail by preventing the UV rays from the sun that still manage to go through the sunbrella, just as you can still see some sunlight through the fibers on a bimini top or awning.
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mainsail, sail, sail cover

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