What size lines to use on my sailboat? - SailNet Community

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Old 02-20-2012
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What size lines to use on my sailboat?

Hello! I recently purchased a 1967 Islander Bahama 24. She is beautiful, but needs to have most all lines installed. How do I decide what diameter/what type of lines to get? Thanks for your help!
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Old 02-21-2012
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Well, I would go as big a diameter as will fit through the sheaves. Thin lines may be plenty strong enough but will shred your hands. So I would say use 10mm if possible or 8 mm if 10 mm is too big. 12mm is nicer but will definetely be too thick to fit.

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Old 02-21-2012
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Echo St Anna...Welcome aboard and enjoy your new love!
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Old 02-21-2012
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Hi and welcome aboard.

You may want to talk to a shop that sells running rigging as there is more to it than just diameter. Different types of line have different strengths and strech ratios. I recently replaced all my 3/8" diameter halyards with 5/16" lines made of Dyneema which has higher ultimate strength and less strech than the old lines. West Marine has a pretty good guide to lines in their catalog that would give you a pretty good place to start.

St Anna is right too, you have to use a diameter that will fit the sheeves too.
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Old 02-21-2012
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My previous boat was an '67 Islander Bahama 24. I believe the halyards were 3/8" rope attached to 3/16" wire. You should check the sheaves to verify the size wire or rope they will handle.
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Old 02-21-2012
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Low stretch line more important on halyards than on sheets. Hand-feel (line size, fuzziness, etc) more important on sheets than on halyard, unless you tune your halyard a lot.
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Old 02-26-2012
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Thanks for all the help, everyone! I'm sure I'll have lots more questions as we roll along..

Christo
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Old 02-26-2012
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What you need, is nothing more than 1/4" diameter. What feels good in your hand is up to you and your crew. I use line from 7/64th to 3/8th on my 25 footer, but most of that has to do with low stretch and low weight. If you're not concerned with that, then buy a spool of 3/8th sta-set and be done with it. Use it for the whole boat. Not a great line, but it works.
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Old 02-26-2012
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Mauri pro has lots of on-line calculators and guides. Useful for an overall view of what you might want and what options there are.
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Old 02-26-2012
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Quote:
Originally Posted by sck5 View Post
Mauri pro has lots of on-line calculators and guides. Useful for an overall view of what you might want and what options there are.
CB:

Like skc5 said:

Mauri Pro calculator
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