Thanks for the links Gents.
OK this is what I see with the 2 splices. FYI - Splicing is part my (and 6 of my staff) job and I'm a Certified splicer for Samson
and a few others. Not that being Certified means much to be honest as it was far from hard or tricky to get (one splice excepted) but does sound sort of cool
Braids 101 - There is (very) basically 2 common and one not so but becoming more common braid constructions out there most will ever see. There is a few more but quite specialised. Most, from the outside, look identical so it is very important you know what the materials used in any braids are before you decide which splice to use.
1, A cover/core braid - This is the common double braid most have on their boat. Usually either Polyester (dacron) over polyester or Nylon over Nylon and a bit of Polyester over Nylon mix. These braids take the load basically 50% each on the cover and core. The core is braided. Use a cover to core splice. Actually polyprop should be added to this bit as well, it is becoming more common.
2, A Core dependant braid - these are your dyneemas, Spectras, Vectrans, Zylons and etc. The load on these braids are taken all by the core and the cover is purely sun protection, to make it look nice and to help hold the damn thing in jambers as most new fibres are as slippery as. The core will be braided. Use a core to core splice.
3, A parallel cored braid - these are not so common but out there. When you get to the core you will find that it is not braided but a whole pile of baby size ropes all in a line i.e all parallel These braids tend to be lower stretch than the braided core versions. DON'T try to splice this as it is very hard to do and a specialist sort of thing. Obviously you can have a go but I would recommend you do a fair few before trusting life and limb on one.
Bobs Pro Splice - ( Eye Splice, the professional method
I don't like it that much, would not use it and never ever comtemplate using it on a high-tech core dependant braid i.e dyneema
or vectran. The only strength in the finished splice is what the cover holds x 2 less a smidgen, no more. Would be fine on a polyester (dacron) over polyester braid where 1/2 the ropes load is carried by the cover and the other by the core. The core is cut out, which is fine and basically what happens in most non-core dependant braids so the load is all on the cover.
Don't panic just yet as when you look at it each 'leg' of the splice carries 50% of the load and with the cover being 50% of the orginal rope you get 50% x 2 so you're back to full rope strength. You will lose some strength as you do with any splice. I'd say that splice could be worked to 80-85% of the un-spliced rope break load. NOT that you should be loading your ropes that high anyway, but we all know that anyway, don't we
The reason I say I don't like it that much is I just think there are better, but similar, ways to do cover to core splices. This one would be easyier to do than most but you'll run the risk of cutting short and just having a big hollow on one side. This is more a cosmetic thing than structural. Being paid to do it we need to look pretty as well as work, damn it
I am a bit surprised that this splice was copied from a 'professionals' one though.
Bobs own splice ( How to Eye Splice double braid rope
As mentioned earlier I like it for Core dependant ropes, maybe with a few less tucks. I suppose you could use it for polyester/nylon and so on but I think there are better options for those. You will run the risk of the cover slipping out at it looking like doggy dodos.
Using this method on Dyneemas, spectras and the like it would be fine and you will suffer no strength loss more than other methods for these braid constructions i.e approx 15%.
I've looked hard at the photos and I still think Bob cut the cover out in between photos 2 and 3.
I'd taper the end of the core (approx 10 rope diameters) before burying and I'd definatly lose the tape at the last second before bury.
Three things to remember when splicing. One is that you are not that tuff, yes YOU
. This means you will not be putting the pulling loads on the rope your boat will so when you tuck things in 10mm and it looks good in the shed it will (could) look cr*p when you winch
a sail up and it pulls the splice 20mm. We see it often where the cover or core has been pulled out and makes it look yuck.
The second is that you will really start to learn braid splicing after you have done a few and used them. The first few you do will look good until you have used them a few times and a few flaws show up. Them you will start to realise the 'process' and how each bit effects another later down the track.
Thirdly IT IS often a complete bast**d to get that last bit of the splice buried. This is far from un-common and something we still battle with at times. That is a fact of rope splicing. The more you do the easier it gets but it is and always will be the problem bit so you just have to battle on sorry.
try to find a nice bit of new rope that is floopy. This generally means there is more room between cover and core which will make the bury a lot easier. If you try with an old, used or new firm rope you will make life hard for yourself. Start with easy and work your way up, you will find it a lot easier and leave more hair on your head
Does that make sense or am I writing in gobbledeegook again