slack in forestay - SailNet Community

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  #1  
Old 08-27-2009
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slack in forestay

I just picked up a new to me 17 ft Siren. I have noticed when sailing on a run the forestay has a lot of slack. The mast only has one side stay on each side and the forestay. It would seem to me by adding two more side stays and running them further back (the current ones are amidship) it would keep the mast from leaning forward causing the slack. Any other ideas?
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Old 08-27-2009
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That's a very simple rig.. probably all you need to do is evenly increase the tension on the two aft shrouds. Beyond that it's fairly normal for shrouds and stays to slacken when they are unloaded. Performance-wise this slack is most likely not an issue, though.
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Old 08-28-2009
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Most any rig has a slack foirestay when running, that is completely normal. Race boats with backstay adjusters usually fully release the backstay when running...prodeucting a slack forestay, Should your forestay ever break, innediately bear off to a run, because on a run it is un-needed.
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Old 08-28-2009
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The Siren was designed for the side stays to be aft of the mast to triangulate the load to the mast being a fractional rig design. When going into the wind the loads from the main through the main sheet and sail will add additional tension to the forestay reducing the sag. When on a beam reach and on a run, the sails will be fuller shaped by the loss of the additional tension from the main. She was designed as a simple no fuss little trailer sailer and with a boom tent, good for boat camping on the weekend..

ps, check out the STAR class when they are on a run, the mast is raked forward 3 to 4 ft!!!
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Old 08-28-2009
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I will just leave it as is then. Still rather new to sailing so still learning. Thanks.
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Old 08-28-2009
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Running additional stays back farther is a bad idea. You won't be able to sheet out the main all the way on a run, and they are not needed. Tighten the shrouds a bit and carry on.
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Old 08-29-2009
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Depends a lot on wind strenght too. On a light day slack in the rig, sheets, halyards etc is desirable. Don't point the boat to high when going uphill.
As the breeze gets stronger you need more tension on all. You can also point a bit higher into the breeze in particular if your in fairly flat water. If you've got big waves it can pay to bear away just a bit to give the boat the power to get through chop.
I don't know your class of boat but if you can't adjust rig tension while you are sailing then set it up for the strongest wind you anticipate. If in doubt over tight is probably better than to loose.
All of the above is rule of thumb stuff. It will vary with type of boat, wind and wave conditions and the experience of the helmsman/crew.Trial and error will tell you whats right for you and your boat.
Do keep at it. There is no other sport like it.
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