I use my Cunningham when I reef to reduce pressure on the double hook thing above the gooseneck. That being said, I don't think my double hook thing (tack hook) has ever been properly installed since I've owned the boat. It's a stainless rod that becomes the hinge pin of the gooseneck and has a very small hole through it at the bottom where I place a small washer and split pin to hold it in place. Without the Cunningham in place the upward tension on the luff of the main places a lot of load on this little pin and I have had one break while reefed after forgetting the Cunningham. This resulted in gooseneck separation which killed my race as fitting it all back together in 25 knots with a boom kicker is nearly impossible without taking everything apart. What is the proper configuration of this little double hook thing (tack hook)? Is there something better than a split pin for this?
Brent D 27-5 Lake Winnipeg. Sent from my iPhone > On Jan 26, 2015, at 6:09 PM, Chuck S via CnC-List <cnc-list@cnc-list.com> > wrote: > > FWIW, I agree with Antoine's description of using the Cunningham and > Flattening Reef. > These tweaks are used similarly on all mainsails, from dinghies to bigger > keel boats. > > > > Chuck > Resolute > 1990 C&C 34R > Broad Creek, Magothy River, Md > > From: "Antoine Rose via CnC-List" <cnc-list@cnc-list.com> > To: "David Paine" <paineda...@gmail.com>, cnc-list@cnc-list.com > Sent: Sunday, January 25, 2015 11:44:33 PM > Subject: Re: Stus-List Cunningham > > Hi David, > > To answer your question, we need to go back a bit to the origin the > cunningham. Well, the main sail is up and properly tensioned, which mean that > the halyard point is close to the mast top block to use the full length of > your mast. Wind is light, not too much tension is needed on the halyard. As > wind increases, more is needed. Eventually, the halyard is fully tensioned > but the wind still get a bit stronger, but not enough to reef and, since > you're racing you don't want to give any water to that boat just beside > yours. As the wind increases, the sail draft moves back, increasing heeling > and reducing speed. Tensioning the cunningham does just that, bringing the > draft forward for two reasons: it increases the tensioning but also, because > the cunningham grommet is slightly aft of the sail, pull forward the main > foot. > > Having the grommet has another advantage. If you have a corresponding grommet > on the leach side, you can take a six inch reef (sorry, don't how it's called > in English, "ris de fond" in French). This very small reef does not reduce > substantially the size of the sail but removes much of the draft. A flatter > main points higher and reduce heeling. > > Antoine (C&C 30 Cousin) > > Le 2015-01-25 à 18:32, David Paine via CnC-List a écrit : > > > Hi All, > > > > I'm buying a new mainsail and I am going to ask a ridiculous-sounding > > question. Do you have a Cunningham grommet in your mainsail? I do not > > in my current sail but that is because Hood made the sail with a jack line > > (or lace line) which serves the purpose. My new sail definitely won't have > > a jack-line. Some adjust luff tension with the halyard, others use a > > separate Cunningham grommet with a many part tackle (or lead the Cunningham > > line to a winch) to set the luff tension. My sailmaker has an opinion but > > my question is, which do you use? The Cunningham is useless when reefed, > > of course. > > > > Cheers, > > > > David > > _______________________________________________ > > > > Email address: > > CnC-List@cnc-list.com > > To change your list preferences, including unsubscribing -- go to the > > bottom of page at: > > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > > > > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the bottom > of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the bottom > of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >
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