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24045Re: [SabreSailboat] Reefing lines size, Sabre 34-I

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  • Leonard Bertaux
    Mar 1, 2010

      If your reefing setup is as mine, with the reef line passing through the cringle and then tied around the boom, you have two to one leverage and double the line diameter carrying the load at the cringle. So half the diameter of your halyard will be more than sufficient in terms of loading. 

      Len Bertaux
      sv/Walkabout S38 MKII

      On Mar 1, 2010, at 10:58 AM, Jeff Bartlett wrote:


      Looking at the whole halyard/reef system, what can the system support, i.e. where is the weak link?  What load can all of the turning and deck lead blocks manage.  If you have a single line system, how strong are the blocks in it? Are they able to manage the potential load of a 3/8" line?  Do they really need to?  Is the line in the system the weak link, or is the weak link a 600# capacity turning block?  Unless the line is the weak link, upsizing lines is not improving the strength of the system.
      According to New England Ropes, 3/8" Sta-Set has a 4,400# tensile strength.  Does any cruiser come anywhere near putting a 4400# load on their main halyard? 
      If you deadend the reefline at the reef tack, I would agree the load on the reef line would match the load on the halyard, but I have yet to see anyone who does not take advantage of at least a 2:1 system at the reef tack, which reduces the load on the reef line by 1/2.
      5/16 Sta-Set has a 3000# tensile strength.  1/4" Sta-Set has a 2000# rating which in a 2:1 system, would likely be plenty of strength opposite a 3/8" halyard.
      Once you figure out what the system can support, then you can figure out what you want.  There may be benefits to a different line size than required.  A different line size could work better with your existing hardware (winch, blocks, clutches, cleats).  A larger line size may be easier to handle.  A smaller line size can be coiled smaller and take up less space. Smaller size lines may take smaller (and less expensive) rope clutches
      Jeff B

      To: Sabresailboat@ yahoogroups. com
      From: mike.merriman1@verizon.net
      Date: Sun, 28 Feb 2010 20:51:06 -0500
      Subject: Re: [SabreSailboat] Reefing lines size, Sabre 34-I

      think about it this way - the halyard is pulling the sail up - you're trying to pull the sail down with the reefing line.  The two should be the same size OR at least strength.  that said, my reefing lines are 1 size smaller than my halyard, and I figure if I blow one of them out, the reefing line is easier and cheaper to replace.

      Sent: Sunday, February 28, 2010 8:16 PM
      Subject: Re: [SabreSailboat] Reefing lines size, Sabre 34-I


      Thanks Mike for the info.  Not to disagree (because this is indeed why I'm asking), but that sounds pretty heavy.  I mean, our outhaul is roughly 5/16 or 3/8, and it doesn't look like anything larger would fit through the blocks.  Our halyards are probably closer to 1/2" (maybe 7/16"), but that seems pretty heavy for reef lines--am I wrong about this?

      From: Mike Merriman (Verizon) <mike.merriman1@ verizon.net>
      To: Sabresailboat@ yahoogroups. com
      Sent: Sun, February 28, 2010 8:02:51 PM
      Subject: Re: [SabreSailboat] Reefing lines size, Sabre 34-I


      reefing lines should be same size as halyard

      Sent: Sunday, February 28, 2010 7:41 PM
      Subject: [SabreSailboat] Reefing lines size, Sabre 34-I

      It's a silly question, but just looking for a sizing recommendation for reefing lines. When we bought the boat last year, we couldn't find the reef lines, so we used what we could find, and they're not right. So I don't know what the standard size would be for reef lines on our boat.

      I am planning to use New England Sta-set or perhaps Samson XLS (the two appear to be very similar). I'm guessing the reef lines would be 5/16 or 3/8-ish. Any specific recommendations?

      1984 Sabre 34, #207

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