I have a Pearson 31, 1978, fractional rig. Is there a book, guide, website that has the tension specs for the shrouds?
Thank You!
Robert
Thank You!
Robert
How much tension on the shrouds?
- Thread starter RobertLangdirect
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This one is great and easy to understand:
http://www.amazon.ca/Sail-Rig-Tuning-Ivar-Dedekam/dp/1898660670
A loos guage will greatly simplify your process.
Rob
http://www.amazon.ca/Sail-Rig-Tuning-Ivar-Dedekam/dp/1898660670
A loos guage will greatly simplify your process.
Rob
There is the generic 10% to 15% of breaking strength
And then on various rigs there are there are settings that may or may not put pre-bend into the mast
If you can find and owners group for your hull you should get the best insight on your rig
And then on various rigs there are there are settings that may or may not put pre-bend into the mast
If you can find and owners group for your hull you should get the best insight on your rig
15% is the plain vanilla tension on most shrouds/stays, .... not to exceed much above 30% when the boat is over at 45° angle of heel.
Your ('most') single spreader rig will need a 3/4" forward mast *pre-bend* ... forward lowers at ~18-20%, aft lowers at 12-15% .... the pre-bend is THE most important. (your mainsail was cut to match this pre-bow/prebend. Prebend is usually set AFTER the forestay/backstay combo is set to 15%. If multiple spreaders, then 1/2" for each 'spreader set'.
Backstay tension set so as not to exceed the sag or luff 'hollow' shape thats cut into the leading edge profile of the jib/genoa's luff when the sail is windloaded (on a beat and well heeled over) .... but NOT to exceed much above 30% backstay tension when in strong winds and when the boat is well heeled over .... a fatigue consideration.
Here's how to do ... backstay is adjusted for each 'days windstrength', otherwise your plain vanilla jib stay / forestay is 15% tension ... thats what a sailmaker EXPECTS for cutting the leading edge (sagged stay) when flying the jib/;genoa in 15±knots of wind: www.ftp.tognews.com/GoogleFiles/Matching Luff Hollow.pdf
Your ('most') single spreader rig will need a 3/4" forward mast *pre-bend* ... forward lowers at ~18-20%, aft lowers at 12-15% .... the pre-bend is THE most important. (your mainsail was cut to match this pre-bow/prebend. Prebend is usually set AFTER the forestay/backstay combo is set to 15%. If multiple spreaders, then 1/2" for each 'spreader set'.
Backstay tension set so as not to exceed the sag or luff 'hollow' shape thats cut into the leading edge profile of the jib/genoa's luff when the sail is windloaded (on a beat and well heeled over) .... but NOT to exceed much above 30% backstay tension when in strong winds and when the boat is well heeled over .... a fatigue consideration.
Here's how to do ... backstay is adjusted for each 'days windstrength', otherwise your plain vanilla jib stay / forestay is 15% tension ... thats what a sailmaker EXPECTS for cutting the leading edge (sagged stay) when flying the jib/;genoa in 15±knots of wind: www.ftp.tognews.com/GoogleFiles/Matching Luff Hollow.pdf
Here's a comprehensive guide to mast tuning & rigging tensions: http://www.riggingandsails.com/pdf/selden-tuning.pdf
... includes set up and tension requirements of B&R rigs
... includes set up and tension requirements of B&R rigs
Rich, Thanks for the link, that's one hell of an articule.
Sam, Ivar Dedekam's book is also very helpful.
Ray
Sam, Ivar Dedekam's book is also very helpful.
Ray
Yeah, I wouldn't touch a Fiat. A Ducati was bad enough.I believe that they're both fiat currencies.
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