Soft shackles a good idea? - Page 6 - SailNet Community
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post #51 of 61 Old 05-31-2011
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Hey Paul. Fundamentally I don't think it is critical; assuming you have enough to do the knot on either side of the marks, only the spacing between the marks is critical. However the line in your photo looks like polypropylene to me; Dyneema's a bit pricier so ideally you don't want to waste too much of it. If you want just enough to be able to tie the knot, then the original line length is more important.

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post #52 of 61 Old 05-31-2011
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Yes it is polyprop, costs just pennies to play around perfecting technique. As I stated, they aren't meant to be used and will never be found on my boat.

As far as I can tell, the spacing between the marks is there to determine loop size which I have done simply by forming the loop and then marking it. I wonder though, given the price of everything else we do to our boats, is an extra dollar of line going to be that detrimental?

BTW, my "fid's" bear a striking reseblance to phillips head screwdrivers.
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post #53 of 61 Old 05-31-2011
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Is there any particular reason that you can't just take a short piece of line and tie the two ends in a knot?
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post #54 of 61 Old 05-31-2011
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Quote:
Originally Posted by PaulfromNWOnt View Post
I wonder though, given the price of everything else we do to our boats, is an extra dollar of line going to be that detrimental?
I dunno. I consider myself a cost-conscious sailor, and I do hate throwing away bits of line that are too short to use. If you're making many soft shackles, it would add up... to like, $10.

Anyway I can't think of any other reason that the total line length is relevant, since you can always trim the tails at any point.

Actually, no, that's not true. If you try to use a piece of line that is too short, then you won't be able to make the shackle at all. So actually it's a minimum length of line.

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s/v Essorant - 1972 Catalina 27
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post #55 of 61 Old 05-31-2011
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Quote:
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Is there any particular reason that you can't just take a short piece of line and tie the two ends in a knot?
Knots weaken the line, and the line we're talking about using here can't be easily knotted anyway. It slips.

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post #56 of 61 Old 05-31-2011
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I used some to put a pair of blocks on the genoa tracks. It does slip, but I just put glue on the knot. If I need to take the blocks off I'll just cut it. As for knots weakening the line, some are better than others. It will still be stronger that the block I think.
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post #57 of 61 Old 05-31-2011
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Knots do indeed weaken the line, but we tend to use oversized line for ease of handling. Shackles are nice because they allow multiple use which cutting wouldn't allow.
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post #58 of 61 Old 08-31-2011
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zz4gta made a few from Dynema for my boat and they work great. The original strength probably goes down quite a bit compared to SS after a couple of years of use and exposure to UV. I'm guessing they would still outlast the jib sheets they are attached to...
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post #59 of 61 Old 08-31-2011
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Zibadun,
The first time I saw one of these things was on a mates boat some four or five years back. He has transferred them from his previous boat so I have no real idea how old they were at the time but by now certainly well past five years and still going string.

Andrew B

“Life is a trick, and you get one chance to learn it.”
― Terry Pratchett, Nation

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post #60 of 61 Old 09-26-2011
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I think the real advantage of using soft shackles for jib sheets is that there is no knot to hang up on the rigging. It make a huge difference in tacking with overlapping genoas.

I have a dozen articles on soft shackles, several unique varaties on L-36.com. The introductory articles is Soft Shackles

Allen
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