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 Rig/shroud tension		  New Topic  Topic Locked
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esailor
Navigator

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USA
118 Posts
Initially Posted - 08/04/2006 :  14:10:47  Show Profile
I have done some searching a have yet to find it. What do you guys set the tension at on your loos gauge.
Uppers?
Lowers fore?
Lowers aft?
Fore stay?

Do you want any mast sag while under way or are you going for a straight rig? I'm sure this would be affected by reefing.
Pete Hagar
Dayton,Ohio
Indian Lake
2770 82/SR/SK/9.9 evinrude
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stampeder
Master Marine Consultant

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1608 Posts
Response Posted - 08/04/2006 :  14:33:11  Show Profile
There's lots of info on this site about rig tension. Not much experience with loos guages on this site tho'....as most of the experts here will adjust to local conditions and their own sail types and condition of sails.
To start with, you are probably best off with a neutral rig. Mast straight up.
I rig with about 1" deflection at(my estimation of)50LBs of force.
I check my rigging everytime I sail. I sight my mast before I set out. I check my rigging on different points of sail to get an idea of what the forces of wind and sail are having on my rigging.
So far, I've found keeping the rigging neutral has worked best for me. When I buy new sails over the winter, I will probably re-visit standing rigging tension. My sails are old and so no amount of rig tuning is going to make an appreciable difference.
My message is: if your boat is new to you, you may be best off with neutral until you've got a good feel for how the boat handles and what would make a difference under your conditions.
I get less mast bend when reefed than when I have a full sail. This may be due to the fact that I use a reefing hook in my cunningham hole to get maximum tension on my luff.
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Champipple
Master Marine Consultant

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USA
6855 Posts
Response Posted - 08/04/2006 :  15:10:36  Show Profile  Visit Champipple's Homepage
Pete -

I'm still working with a few lofts up this way to write up some tuning guides. The big problem is that in general this isn't a racer.

Because of that – Guys set the stick and keep her straight and at a tension that feels good and are done with it.

Personally, I go by feel I get it even and then adjust them once the sails are up the first couple times out every season. Then when I get to the dock and its blowing 20 I know that it will be 5 turns on the backstay (mine isn’t adjustable – wish I had that) and 8 turns on the uppers and 4 turns on the forward lowers.

If its only blowing 5 I take a couple off. We are usually out to the racecourse 50 minutes early so we can make the adjustments before the start without any problem if the sails are wrong.

Everyones rigs are vary different too. I have all new rigging and it is different in diameter than the original. There are probably 4 different backstay designs. Different headstay types. We would seriously have to undertake a project in order to get all the right settings.
Edited by - Champipple on 08/04/2006 19:06:09
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Dave Bristle
Master Marine Consultant

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Djibouti
10005 Posts
Response Posted - 08/04/2006 :  17:27:38  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by stampeder</i>
<br />To start with, you are probably best off with a neutral rig. Mast straight up.
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
...unless that produces a totally neutral or lee helm (as I had when I bought Passage). I raked the mast back a little to get a light weather helm--for safety. (Yes, you can affect the helm somewhat by trimming, but I find the helm is fairly constant when trimmed "normally"), and depends more on how much sail I'm flying.) An expert racer told me a few degrees of weather helm makes a boat faster--I don't know why...
Edited by - Dave Bristle on 08/04/2006 17:28:51
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Champipple
Master Marine Consultant

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USA
6855 Posts
Response Posted - 08/04/2006 :  19:07:45  Show Profile  Visit Champipple's Homepage
A few degrees of weather helm makes you able to feel things quicker, which if you correct for immediately can make you faster.
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Dave Bristle
Master Marine Consultant

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Djibouti
10005 Posts
Response Posted - 08/04/2006 :  19:44:28  Show Profile
The racer (who has a 42' one-off sled with a 4-spreader rig) said something about how it improves the lift of the keel. I dunno... Hmmmmmm... I think I just figured it out! The rudder, in trying to correct for weather helm (by turning leeward) causes the keel angle (fore to aft) to be such that the water is pushing more on its windward side, stiffening the boat... Hows that sound?
Edited by - Dave Bristle on 08/04/2006 19:51:01
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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts
Response Posted - 08/04/2006 :  22:50:59  Show Profile  Visit Frank Hopper's Homepage
Brilliant!
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Carl B.
1st Mate

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USA
83 Posts
Response Posted - 08/04/2006 :  23:30:38  Show Profile
That's why they call you all "Master Marine Consultants”.
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sweetcraft
Admiral

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USA
816 Posts
Response Posted - 08/05/2006 :  01:50:46  Show Profile
That's the best one yet, Thanks.
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Champipple
Master Marine Consultant

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USA
6855 Posts
Response Posted - 08/05/2006 :  07:57:23  Show Profile  Visit Champipple's Homepage
I might buy that!
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Dave Bristle
Master Marine Consultant

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Djibouti
10005 Posts
Response Posted - 08/05/2006 :  12:55:59  Show Profile
I'm waiting for a rebuttal... Arlyn??
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.