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donWolfe 07-25-2012 07:19 PM

shroud tension
Looking for base tensions, upper and lower shrouds on a Capri 30

WDS123 07-27-2012 09:04 PM

Re: shroud tension
call Frank Butler

sailingfool 07-27-2012 09:55 PM

Re: shroud tension

Originally Posted by donWolfe (Post 901211)
Looking for base tensions, upper and lower shrouds on a Capri 30

Just tight enough to keep the mast in column...

SloopJonB 07-28-2012 10:54 PM

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.

RichH 07-30-2012 12:21 AM

Re: shroud tension
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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:

For basic mast tuning, once you set up for 15% go to: .... 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'.

Seaduction 07-31-2012 08:58 AM

Re: shroud tension

DRFerron 08-02-2012 11:49 AM

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

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