Soft shackle knots

Spuddy

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I made a few soft shackles a couple of years ago. Two were ideal for replacing the metal one which connected mainsheet to boom end as that was wearing the alu casing away. Knot I used was the diamond knot which was a struggle initially but helped by wrapping red and blue insulation tape around tail ends.
Had another go at some more recently which displayed age influenced decline in the number of marbles. Tried to have a go at the neater button knot but failed to complete one repeatedly. So reverted to diamond knot with mixed success - probably 50% with the genuine article; the others were untidier but bulky enough and seemed secure enough.
So how crucial is the knot? Does it only matter to those with a variety of OCD. Or there's the knot enthusiasts who maybe go a bit too far. Or will my macrame let me down?
I remember a presentation by the RNLI where as a filler some lad from their office did a talk on knots...lots of them. I'm quite keen on knots and can do quite a few even to the extent that when presented with a knotty problem I can muse about which of several to use. However this lad, obviously not a sailor, had got it to fetish level and confused most people. Afterwards I chatted and mentioned that most folks were best off with a few knots they could guarantee even in stressful situations and mentioned the national mountaineering centre at Plas Y Brenin who as a policy use a figure of 8 for everything. Don't think he got the point - I was probably too oblique/diplomatic.
Which now makes me think: I'll try out a soft shackle using a figure of 8.
What think anyone>
 

noelex

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My wife does not contribute to YBW, but has written instructions on how to tie the button knot here:
http://www.cruisersforum.com/forums...ngth-soft-shackle-and-button-knot-155591.html

The newer designs of soft shackles she makes with an improved opening at the noose end and with the button knot are nicer to use. From memory, the strength of the button design is about 30% stronger than those constructed using the diamond knot.

Soft shackles are so strong that this difference is often not a great factor, but on some applications strength is an issue and on others it allows the use of thinner Dynemma so the shackle is less expensive.
 

GHA

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From the awfully useful wayback machine, unfortunately this webpage is no more..

https://web.archive.org/web/20160715154948/http://www.bethandevans.com/load.htm

Fig of 8 might well slip over time, that's one of the things with dyneema, it will slowly slip through most knots very slowly under load.

I still need to go back to this image tying the diamond knot, though can be done in no time after a bit of practice, then use mole grips to get the knot bedded in as much as poss.

d95444d0a62e12be6255798b4044a6e0.jpg
 

Spuddy

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Thanks all. That was helpful and encouraging. I'll have another go with the bits of paracord I practice with
 

Spuddy

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I've been an admirer of animated knots and think it's a brilliant concept but in the more complex stuff there is usually a point where I get lost ...like those road diversions where the signs go missing. Similarly, other instructions probably suit those with the snake wrestling gene.
So please make an allowance for me being more prone to bewilderment than I used to be.
Just done some in 6mm and 4mm using just the figure of 8; heaved each one up really taut with genoa winch and left for a while. No sign of creep. Knot big enough not to pull through. if there are any drawbacks in strength then the solution for me would be to make up a thicker shackle.
I'm a big fan of soft shackles and built up a stash of this version which take about 10 mins each to make. I'll report on how this version performs in case anyone else struggling with the sophisticated versions finds it helpful
 

Stemar

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I have soft shackles used to hang my whisker pole on my genny when poling out. The loop is made by making a hole through the line near the middle and feeding the longer end through it and a monkey's fist is used on the end.

 
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