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Deborah
1st Mate

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USA
30 Posts

Initially Posted - 07/31/2018 :  20:53:41  Show Profile  Reply with Quote
how much play should be in upper and lower shrouds?

1985 Catalina 25 Fin Keel #5160
"Mottley Crew"
Spring Grove, IL

Captmorgan
Navigator

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USA
194 Posts

Response Posted - 08/01/2018 :  20:03:30  Show Profile  Reply with Quote
https://theriggingco.com/2017/01/21/how-to-tune-a-sailboat-mast/

https://northsails.com/sailing/en/2016/10/how-to-tune-your-rig

This last one is the one I used

http://seldenmast.com/files/595-540-E.pdf


"The Gal-Way" 1985 SR/SK Barnegat Bay, NJ

Enjoy Sailing =) Be Safe

Happy Sailing - John




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Sailynn
Navigator

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USA
151 Posts

Response Posted - 08/04/2018 :  00:23:09  Show Profile  Reply with Quote
The basic idea is make sure the uppers and forestay and backstay are hand tight so the mast is plum. To do this without a Loose Gauge I then hand tighten the lowers, then back off two turns. Go sailing in your comfortable wind speed and check shrouds on port and starboard tacks for equal slack tension. Go sailing again and check for lee or weather helm. Adjust the forestay.

Lynn Buchanan
1987 C25 SR/WK #5696
Sailynn
Nevada City, CA
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Voyager
Master Marine Consultant

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USA
4110 Posts

Response Posted - 08/04/2018 :  07:25:37  Show Profile  Reply with Quote
To answer the question.

When the boat is at the dock the upper shrouds, lower shrouds forestay and backstay should seem tight. The mast should be centered and plumb straight up and down. There should be no play in the rigging, meaning the stays and shrouds should feel firm. When plucked they should all vibrate smartly.

When the boat is sailing and on a heel, however, the leeward shrouds will get loose and may even sag. This is normal. When on the opposite tack, your leeward shrouds (now on the other side) should be equally slack.

If, however, you donít like this look, when you get safely back to the dock or at anchor, you can tighten the shrouds 1-2 turns equally on both sides. Take a look to see that the mast is still straight and plumb.

Bruce Ross
Passage ~ SR-FK ~ C25 #5032

Port Captain Stratford & Milford, CT
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