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 extra grommet above boom on mainsail luff
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Oneday
Deckhand

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USA
20 Posts

Initially Posted - 06/22/2022 :  04:22:51  Show Profile  Reply with Quote
Can someone explain the purpose of the extra grommet on the luff of the mainsail about 10" above the grommet that attaches to the boom at the foot? Thanks Dan

Steve Milby
Past Commodore

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USA
5721 Posts

Response Posted - 06/22/2022 :  05:12:12  Show Profile  Reply with Quote
That grommet is for a cunningham. It's an alternate way to increase luff tension. It flattens the luff of the mainsail and moves the draft forward. You can do the same thing by increasing tension on the main halyard.

Steve Milby J/24 "Captiva Wind"
previously C&C 35, Cal 25, C25 TR/FK, C22
Past Commodore
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Oneday
Deckhand

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USA
20 Posts

Response Posted - 06/22/2022 :  05:31:50  Show Profile  Reply with Quote
Does it also have something to do with reefing? Something called a jackline attaches to it? Not the jackline that holds you in the boat.
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islander
Master Marine Consultant

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USA
3929 Posts

Response Posted - 06/22/2022 :  07:45:24  Show Profile  Reply with Quote
The reefing cringle is above the cunningham cringle. you can have 2 of those if you have a second reef set up. Like Steve said You can do the same thing by increasing tension on the main halyard so many dont use a cunningham. I don't have one set up.

Scott-"IMPULSE"87'C25/SR/WK/Din.#5688
Sailing out of Glen Cove,L.I Sound



Edited by - islander on 06/22/2022 07:47:46
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dmpilc
Master Marine Consultant

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4593 Posts

Response Posted - 07/09/2022 :  14:41:53  Show Profile  Reply with Quote
It also sounds to me that the additional grommet is for a Cunningham, although I think mine was closer to the tack. Some C22 and C-25 main sails have the last slug attached to a fairly thin line rather than being attached to a grommet in the sail, the purpose of which is to be able to lower the main for storage under the sail cover without having to remove the sail slug stop or lower it below the stop opening to remove the last slug. It allows the sail to be lowered enough to get the cover on and may be necessary for reefing, too. That small line is the jackline that Oneday is asking about.

DavidP
1975 C-22 SK #5459 "Shadowfax" Fleet 52
PO of 1984 C-25 SK/TR #4142 "Recess"
Percy Priest Yacht Club, Hamilton Creek Marina, Nashville, TN

Edited by - dmpilc on 07/10/2022 08:26:21
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