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recommended rigging tension

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yachtblueheron View Drop Down
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Joined: 26 Sep 2010
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Post Options Post Options   Quote yachtblueheron Quote  Post ReplyReply Direct Link To This Post Topic: recommended rigging tension
    Posted: 26 Sep 2010 at 11:20pm
After a cold winter ashore (slow DIY engine overhaul) we find the rigging tensions are not what they were last year. On a reach some of the lee side stays are so slack you can see them flapping from the cockpit. Without sail some of the aft lower stays can move up to four inches when pushed 1/3 of the length. I also notice a load creaking in the cabin in strong winds, and some stress cracks have appeared on the deck below 2 of the U bolts (fore and aft lower shroud).

Tomorrow we are going to redo the tensions as recommeded on seldon, however I saw a few posts elsewhere saying the CO32 "bends like a banana" using those tensions of 15% of breaking (20 on backstay).

Can anyone recommend the best tension to put on which stays? We have a furling genoa.

Hi from Trebeurden, heading South!

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Jeremy and Fiona View Drop Down
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Joined: 30 Sep 2009
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Post Options Post Options   Quote Jeremy and Fiona Quote  Post ReplyReply Direct Link To This Post Posted: 30 Sep 2010 at 12:25pm

I’ve just spoken to Jeremy about this, and first of all he suggests that newish rigging such as yours will have stretched a bit, but not that much.

 

He thinks you may have an issue with the mast step wedge, so you should check to see whether it’s intact or maybe collapsed.  If this needs to be fixed, then unfortunately it’s a biggish job to re-glass it and make it sound.

 

On the bright side, these mast and rigging tension instructions are faily standard, and they may be all you need to know:

The mast should rake 6" from the top of the mast to deck level.  
The lower cap shrouds should be adjusted while sailing, allowing the mast to bend 
forward slightly but not to sag to leeward.  If they are too tight the middle of the
mast will be pulled up to windward.  Adjustments should be done on the wind, 
ideally in about 15 - 20 knots of breeze.
Hope this helps,
Fiona (on Jeremy's behalf)
 
 
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doug View Drop Down
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Post Options Post Options   Quote doug Quote  Post ReplyReply Direct Link To This Post Posted: 30 Sep 2010 at 1:49pm
  Here is a video of Gigi (I think) sailing very well.   I think you can also spot JR in some of the shots.
 
 
  Anyway, you will see that the lee rigging is not bar tight.   I remembered these shots because they nicely reinforced my feelings -)       I never felt the need for rigging wound up like banjo strings.
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Jeremy and Fiona View Drop Down
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Post Options Post Options   Quote Jeremy and Fiona Quote  Post ReplyReply Direct Link To This Post Posted: 30 Sep 2010 at 2:32pm
It is indeed Jeremy aboard Gigi.
 
Fiona
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