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1118Re: [j4x-owners-group] Boom Preventer [1 Attachment]

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  • William Stellin
    Nov 13, 2013
      what keeps the web strap from sliding forward.  I am sure what you are using works fine.  I just rather not have all extra kinds of "stuff" on the boom.  We race the boat and as you know "less is more" when it comes to kit on the boat.  I always try to make sure things can do double duty to avoid overloading the boat.  My preventer didn't cost anything as I already had a pad eye and snatch block for the bow, line and snap shackles. And I didn't have to drill holes in anything. I use the primary winches to tension the preventer which I think is much better than using a rope clutch.  Plus there are never enough clutches anyway.   I use my clutches for the main halyard, the pole lift, the reef lines , up and down, the cunningham, the boom vang and one spin halyard. The pad eye on the bow is forward of the windless and is a great big U bolt that can hold more than one snap shackle at a time.  It is through bolted with an thick aluminum backing plate underneath.
      Bill  #6

      Sent from my iPad

      On Nov 13, 2013, at 6:23 PM, "Anthony M Iacono" <tony@...> wrote:


      Bill further to your point about load distribution . What do you think of the set up pictured ? My preventer is not bolted but uses a tight sewn web strap all around the boom. I use stops ( I know how you feel about strops) but essentially the preventer line attached to the boom via a strong sewn web strap.  ?
      My thought is that will evenly distribute the load. Ti

      From: William Stellin <wstellin@...>
      Reply-To: <j4x-owners-group@yahoogroups.com>
      Date: Wed, 13 Nov 2013 16:08:48 -0500
      To: "j4x-owners-group@yahoogroups.com" <j4x-owners-group@yahoogroups.com>
      Subject: Re: [j4x-owners-group] Boom Preven

      Thru bolting to only one surface of the boom is not the same as thru bolting all the way from one side to the other.  Using the boom bail with a hardened snap shackle distributes the load to both side of the boom and does not require any additional hardware.  Also you never have to leave the cockpit to rig it.  The preventer is a continuous line and has a shackle at both ends so you unsnap one and snap on the other when the boom is centered.  
       It worked perfectly on both of our Atlantic crossings and it only took one of us to rig it which is especially good at night when the off watch person is trying to get some sleep. 
      Bill  #6

      Sent from my iPad

      On Nov 13, 2013, at 4:00 PM, sailgarrett@... wrote:


      That is good info concerning your preventer rig. As to the issue of a torquing load on the boom with the preventer attached to the boom bail, first any such load will be offset somewhat by the opposite pull of the main sheet. Second, that torque is likely to be no greater than the torquing load in the opposite direction when the preventer is not working or not engaged.
      Waddy Garrett
      J46 Running Tide
      In a message dated 11/13/2013 2:16:06 P.M. Eastern Standard Time, rersk@... writes:

      The padeyes on either side of the boom are  bolted onto the boom, not screwed.  They were installed by Chuck Poindexter of Sound Rigging, Essex CT.  Attaching the boom stowed preventer pennant lines to the boom bail would not lead as fair, and would tend to create a torquing load on the boom and gooseneck when stressed.

      ---In j4x-owners-group@yahoogroups.com, <shearwater@...> wrote:

      I just installed this preventer system today in Bermuda. Chuck Poindexter at Sound Rigging Services (860-391-3944) sells everything (except the "fore guy") as a kit - drill bits included! We'll test it out on our trip South next week.   


      Shane Creamer


      J 42 #30 Baruna

      From: "Thomas Keffer" <tkeffer@...>
      To: j4x-owners-group@yahoogroups.com
      Sent: Thursday, November 7, 2013 10:10:42 AM
      Subject: Re: [j4x-owners-group] Boom Preventer


      Tom Keffer
      +1 541-386-8891 (h)
      +1 541-490-9507 (c)
      Skype: tkeffer

      On Thu, Nov 7, 2013 at 6:38 AM, gmail account <cdsail123@...> wrote:

      I do not see the photos.



      Another J # 46


      From: j4x-owners-group@yahoogroups.com [mailto:j4x-owners-group@yahoogroups.com] On Behalf Of rersk@...
      Sent: Thursday, November 7, 2013 8:32 AM
      To: j4x-owners-group@yahoogroups.com
      Subject: RE: [j4x-owners-group] Boom Preventer



      I posted some photos of our preventer set-up on Cayenne.  It sounds quite similar to the ones described by others on this thread.  Attaching the preventer control line to a boom mounted preventer at the end nearest the gooseneck means the system is easy to set with boom out, and easy to change after gybing.  The bungee sewn into the middle of the boom mounted preventer line holds it in place on the boom when stowed and helps absorb the shocks of accidental gybes and unexpected backwinding.  The inner forestay also pictured is excellent for either storm jib or heavy weather jib, putting the roller furling genoa out of harm's way.

      Reed  s/v Cayenne #65

      ---In j4x-owners-group@yahoogroups.com, <tony@...> wrote:

      Thank you Frank. Tony
      Sent from my iPhone

      > On Sep 28, 2013, at 8:08 PM, Frank Flannery <fflanner@...> wrote:
      > I have used a similar setup with a slight difference:
      > The two lines lead from the bow are of fixed length and each is stored
      > on the rail just forward of the lifeline gate. I used a single strop
      > on the boom that was led through a block on the boom bail, forward to
      > the front of the boom then down and back to an existing clutch on the
      > cabin sole. Bungee held the stop up and out of the way when not in
      > use. To gybe, let the clutch loose, gybe, then go the the leeward
      > rail and switch the preventer line to the new leeward one and take up
      > on the rope clutch again. It can be done without adding any deck
      > hardware, assuming you can free up a clutch on the cabin sole under
      > the dodger.
      > Fra nk
      >> On 9/17/13, Thomas Keffer <tkeffer@...> wrote:
      >> Yes, the shackle is a Tylaska T-8. Overkill perhaps, but they release
      >> nicely under load.
      >> I just feed the line through the bow cleats --- no block.
      >> You could do this using one strop with shackle. The shackle would then clip
      >> into the shock cord when not in use. It's important to use spectra for the
      >> strop because it is light. This way, when you park the strop, the shock
      >> cord will neatly snug it up against the boom.
      >> Frankly, I don't remember why I used two strops. Maybe because that's the
      >> way Starzinger does it and I shamelessly copied? :-)
      >> -tk
      >> On Mon, Sep 16, 2013 at 10:21 AM, Anthony M Iacono
      >> <tony@...>wrote:
      >>> **
      >>> Hi Tom,

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