Splicing website suggestions?

O

Oscarpop

Well-Known Member
Joined
31 Jul 2011
Messages
1,053
Location
Kent
Visit site
Can anyone point me in the right direction please.

I am going to teach myself to splice both multi plait and dyneema style lines with all manner of eyes.

I am going to get myself a set of fids from somewhere and spend my week off learning the ropes .

thanks.
 
I'd also recommend YouTube. There are usually multiple videos so you get to see alternative descriptions, some of which might be clearer for you than the others.
 
I have found that octoplait can be spliced and makes a strong eye. I have seen a lot of bad eyes on braid-on-braid and other braided lines. The problem is always that one side of the splice has no core re-entering the main part, meaning that you have only the sheath taking the load. It is not just mine that turned out like that, several from professional riggers are the same. For these ropes, I have reverted to using whipped eyes.
 
Wight Dawn said:
I have found that octoplait can be spliced and makes a strong eye. I have seen a lot of bad eyes on braid-on-braid and other braided lines. The problem is always that one side of the splice has no core re-entering the main part, meaning that you have only the sheath taking the load. It is not just mine that turned out like that, several from professional riggers are the same. For these ropes, I have reverted to using whipped eyes.
Click to expand...

I've looked at lots of videos and dems on eyesplicing braid on braid and they all end up with the cover a long way in the core and the core going round the eye the opposite way and buried either just a little - or in some cases not at all - in the core/cover.

I was quite worried about this to start with but after doing quite a few it seems to work pretty well. I'm sure there's a physicist in the forum who can say why - or why I'm wrong - and it would be certainly be interesting to understand the load limitations of this type of splice.

Getting both core and cover into the standing part to any great length without so much tapering that it defeats the object seems impossible. The standing part cover can't accomodate both parts at normal size.

Nowadays my aim is to have the cover buried a good way into the core and the core buried some way past the crossover - say 3 or 4 diameters -and a reasonably tapered and pliant line going away from the eye.

So far that seems to work, but I'm sure there are experts out there with different views.

As others have said, there are lots of demos on the net and this is definitely something thet benefits from viewing someone doing it.
 
Sinc said:
I've looked at lots of videos and dems on eyesplicing braid on braid and they all end up with the cover a long way in the core and the core going round the eye the opposite way and buried either just a little - or in some cases not at all - in the core/cover.

I was quite worried about this to start with but after doing quite a few it seems to work pretty well. I'm sure there's a physicist in the forum who can say why - or why I'm wrong - and it would be certainly be interesting to understand the load limitations of this type of splice.

Getting both core and cover into the standing part to any great length without so much tapering that it defeats the object seems impossible. The standing part cover can't accomodate both parts at normal size.

Nowadays my aim is to have the cover buried a good way into the core and the core buried some way past the crossover - say 3 or 4 diameters -and a reasonably tapered and pliant line going away from the eye.

So far that seems to work, but I'm sure there are experts out there with different views.

As others have said, there are lots of demos on the net and this is definitely something thet benefits from viewing someone doing it.
Click to expand...

Think of it as a continuous loop. There is a tension on the line that is shared between the outer braid and the core. Let's simplistically think of them as being shared equally. So half the force is carried by the outer braid, which continues past the splice, loops around the shackle (or whatever) and goes past the splice and inside the core. The tension is transferred to the inner core via friction.

The forces at the shackle in the loop must be in equillibrium. So, if we go back to the idea above and consider where the tension in the line is not equally shared between the core & outer braid, they must equal out at the splice, so there is likely to be some transfer of tension between core and outer braid vis friction where the other part of the braid is inside the core, so the bulking out of the core inside the outer sheath is important for the splice to work.

So the strength of the splice will be limited by either the maximum tension that can be transferred by friction within the splice or the strength of the outer braid, which ever is weakest. Remember though that the tension on the outer braid is half the total. So if the outer braid snaps at the loop at 1,000N the line will be under 2,000N of tension when that happens.

The core within the loop will be having very little effect, but it makes the loop look nicer and helps the strength of the outer braid by reducing the tightness of the curve around the shackle under load.

Making the splice of the sheath within the core should make the splice stronger up to the point where it is stronger than the outer braid around the shackle can take. Any more is superfluous.
 
dt4134 said:
Think of it as a continuous loop. There is a tension on the line that is shared between the outer braid and the core. Let's simplistically think of them as being shared equally. So half the force is carried by the outer braid, which continues past the splice, loops around the shackle (or whatever) and goes past the splice and inside the core. The tension is transferred to the inner core via friction.

The forces at the shackle in the loop must be in equillibrium. So, if we go back to the idea above and consider where the tension in the line is not equally shared between the core & outer braid, they must equal out at the splice, so there is likely to be some transfer of tension between core and outer braid vis friction where the other part of the braid is inside the core, so the bulking out of the core inside the outer sheath is important for the splice to work.

So the strength of the splice will be limited by either the maximum tension that can be transferred by friction within the splice or the strength of the outer braid, which ever is weakest. Remember though that the tension on the outer braid is half the total. So if the outer braid snaps at the loop at 1,000N the line will be under 2,000N of tension when that happens.

The core within the loop will be having very little effect, but it makes the loop look nicer and helps the strength of the outer braid by reducing the tightness of the curve around the shackle under load.

Making the splice of the sheath within the core should make the splice stronger up to the point where it is stronger than the outer braid around the shackle can take. Any more is superfluous.
Click to expand...

Thanks for detailed analysis. I take your point and I'm sure you're right in that it's not just the strength of a single cover that represents the strength of the splice. Getting the core back into the standing part for a bit does seem to give the whole splice a better shape though - and it prevents any part of the eye being formed just from the cover.
Overall it seems rare that modern line is under load anywhere near it's breaking strain - might not be true on racers of course - so the weakness induced by the slice probably doesnt matter too much.

I wonder if there is any empirical data around?
 
Sinc said:
I wonder if there is any empirical data around?
Click to expand...

Not quite, never got round to testing a splice from braid on braid yet, but shackles home made from 8mm tech 12 are really strong :cool:

IMG00049-20110121-1608.jpg
 
Of course, what works for any particular person depends on their learning style and personal preferences.

But I'd have said that a book - which you can leave open on the right page, go back and check the last bit you did and so on, and which you can (if and only if necessary!) mark with helpful notes - is a better bet than video instructions. I need both hands and most of my attention on the rope to make a good splice, so having a PC running alongside isn't really a good idea.

Ashley is the gold standard for traditional splicing (and all other forms of knotting), but there are many good books on splicing modern ropes. I learned braid-on-braid and octoplait splicing from a book; it's on the boat so I can't recall the title, I'm afraid.

Finally, practice makes perfect! My first braid-on-braid splice had to be redone after a month or two; the last few I've done have been much better. Still working on octoplait; the splices don't look as aesthetically pleasing as 3-strand splices! However, given the nature of the beast, I'm pretty sure they are strong.
 
You must log in or register to reply here.

Share this page

Top