On our boat, we have a custom boom (wedding present) that in addition to having an internal outhaul and two reefing lines at the end of the boom, has a preventer incorporated into it. A line runs from a line stopper in the cockpit to a block at the base of the mast and up to the centrally placed sheave at the front of the boom and from there to approximately the center of the boom, forward of the mainsheet blocks, where it exits from box with another sheave. We have a big safety snap hook hanging off the end of the line (dongle...) that can be run to the toenail wherever appropriate for the conditions.
Because the boom is custom, the internal section foe all of this is built up internally to handle the loads as much as possible. Not optimum but a viable and different approach. Dave 1982 C&C 37 - "Ronin" Sent from my iPad On May 10, 2013, at 11:45, dwight veinot <dwightvei...@hfx.eastlink.ca> wrote: > I never thought of running the preventer all the way to the bow. On my 35 > MKII which has a high aspect ratio main sail on a 12’3” boom I simply attach > the preventer (my boom vang mostly) to the toe rail and tension with a > mechanical advantage of 4. C&C toe rails are strong enough for jib leads so > I figured they would be strong enough for the preventer. I have not sailed > the boat in winds above 30-35 true but maybe under heavier conditions I would > want a different set up, but actually nowadays for my sailing pleasure any > winds above 25 kts true the main sail is packed and covered. Never once did > I feel boom integrity or any other attachment was at intolerable risk. > > Dwight Veinot > C&C 35 MKII, Alianna > Head of St. Margaret's Bay, NS > > From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Andrew > Burton > Sent: May 10, 2013 12:33 PM > To: cnc-list@cnc-list.com > Subject: Re: Stus-List Gybe preventer > > One thing I've seen on boats that run a lot or have high, long booms, is a > permanently rigged piece of Dynema attached at the end of the boom and run > forward to the a snap-shackle at the gooseneck. That way it's easy to rig a > preventer to the bow when the sheets are already eased; just release the line > from the end of the boom and snap it to the preventer from the bow. If > running to the bow, I will usually just run the preventer through the mooring > line fairlead...with appropriate chafe protection if it's going to be rigged > for more than a few hours. > > Andy > C&C 40 > Peregrine > > > On Fri, May 10, 2013 at 11:16 AM, David Risch <davidrisc...@msn.com> wrote: > Ditto what Andy said... > > And when in ocean I run two preventers - port and starboard to the bow and > back to cockpit winches. All lines, blocks are of stout sizing. Loads can > be enormous. > > That way in sloppy conditions you have a "controlled " jibe. > > David F. Risch > 1981 40-2 > (401) 419-4650 (cell) > > > From: a.burton.sai...@gmail.com > Date: Fri, 10 May 2013 10:16:35 -0400 > > To: cnc-list@cnc-list.com > Subject: Re: Stus-List Gybe preventer > > Personally, I like to have one as close to the end of the boom as > possible--all the way from the end to the bow, if I'm running. Think about > the forces on the boom when the preventer stops an accidental gybe; they are > not straight down, which is how the boom is strongest. The forces are more > from the side (because the preventer is led forward to hold the boom in one > place), which is the weakest part of the boom. Another thing to consider is > that if at all possible, you should lead your preventer inside your lifelines > so you don't wipe out or bend a couple of stanchions if you gybe. All that > being said, it's kind of difficult to find a place near the end of the boom > if you don't have a loose-footed main so the preventer will probably be > attached at the mainsheet bail. > I use a preventer pretty much all he time my sheets are eased, even in light > stuff, a powerboat wake can cause the boom to swing into the back of a head. > I wouldn't go with anything too stretchy; Dacron is fine. I usually use a > single line from the boom to a block on the rail and back to a winch, so it's > easy to adjust when I trim the sails. > > > Andy > C&C 40 > Peregrine > > > On Fri, May 10, 2013 at 8:56 AM, Joel Aronson <joel.aron...@gmail.com> wrote: > The doctor who spoke at the Safety at Sea seminar said the #1 thing you can > do to prevent injury is to rig a gybe preventer. My mainsheet sheets > mid-boom. I know you need a rope with stretch to absorb shock. > > I was thinking of making a preventer as follows: > Dyneema loop around the boom just aft of the mainsheet blocks. 3 strand > nylon with snap shackles to attach to the loop and toe rail. Is that too > simple? Should it run through a block to a cleat or clutch? > > -- > Joel > 35/3 > Annapolis > 301 541 8551 > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > > > > > -- > Andrew Burton > 61 W Narragansett Ave > Newport, RI > USA 02840 > http://sites.google.com/site/andrewburtonyachtservices/ > phone +401 965 5260 > > _______________________________________________ This List is provided by the > C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > > > > > -- > Andrew Burton > 61 W Narragansett Ave > Newport, RI > USA 02840 > http://sites.google.com/site/andrewburtonyachtservices/ > phone +401 965 5260 > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2012.0.2241 / Virus Database: 3162/5813 - Release Date: 05/10/13 > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com
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