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post #1 of 7 Old 07-25-2012 Thread Starter
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shroud tension

Looking for base tensions, upper and lower shrouds on a Capri 30
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post #2 of 7 Old 07-27-2012
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Re: shroud tension

call Frank Butler
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post #3 of 7 Old 07-27-2012
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Re: shroud tension

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Originally Posted by donWolfe View Post
Looking for base tensions, upper and lower shrouds on a Capri 30
Just tight enough to keep the mast in column...

Certified...in several regards...
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post #4 of 7 Old 07-28-2012
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Re: shroud tension

Theoretically, standing rigging is supposed to be tensioned to a specific percentage of its breaking strength - obviously this makes it different for every size & type of rigging - wire, rod, galvanized, stainless etc.

IIRC, S/S 1 X 19 is supposed to be 15% of its breaking strength.

Personally, I spent a few bucks for a Loos gauge - that makes it easy to ensure the same base tension on all the stays & shrouds.

I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
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post #5 of 7 Old 07-29-2012
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Re: shroud tension

Google Image Result for http://www.tqci.net/~jkriz/Dimensions.jpg

If the mast is single spreader set, provide 3/4" forward mast pre-bow by slightly overtightening the forward lowers and undetightening the aft lowers AFTER initial tension of 15% each. If double spreadered, then 1" forward prebow total - via forward and aft lower adjustment, then prelimarily set all others to 15%, etc. etc. etc. etc. .

Once you get to the 'basic' rig tune..., and If sailing in much more or much less than 15kts ... (above is for normal sailing in 15kts.) then adjust backstay tension as per: http://www.ftp.tognews.com/GoogleFil...f%20Hollow.pdf

For basic mast tuning, once you set up for 15% go to: www.riggingandsails.com/pdf/selden-tuning.pdf .... choose single spreader mast head or double spreader mast head ... and do the fine tuning from there. Seldén's methods are very similar to and are applicable to a Kenyon mast.

FORESTAY tension is THE most important - so the headsail takes on it proper set/shape.
Every day is different so the backstay (forestay, actually) tension is different 'every day'.
:-)

Last edited by RichH; 07-31-2012 at 09:20 AM.
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post #6 of 7 Old 07-31-2012
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post #7 of 7 Old 08-02-2012
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Re: shroud tension

I'm moving this thread out of the SailNet FAQ forum and into Gear and Maintenance.

Donna


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