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Post by Punter on Dec 21, 2023 14:31:45 GMT 12
OK, so I just picked up some very flash Supercable78 - thanks also for advising above what splice to use. On the drive home I was getting my head in a twist if I should use class 1 or class 2 - because the cover seems to be part of the strength on this rope. Typically I would use a Class 2 splice for anything with a UHMWPE core - but in the text above GO30 mentions how the cover is also load bearing and that "together" the cover and the core provide the strength... which has be wondering if this should be a Class 1 splice!?! And would I actually be weakening the rope by using a Class 2 splice?? My gut tells me to just use a Class 2 splice - so I feel I am overthinking it ;-) |
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Post by DuckMaster on Dec 21, 2023 18:02:58 GMT 12
I would go with a normal double braid splice as these splices are designed for ropes that share their load over the core and the cover.
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Post by GO30 on Dec 22, 2023 5:48:04 GMT 12
Class 2 is what we use and have tested extensively to get the good numbers.
Don't short cut on the bury, with all Umpys the bury length is very important.
Never use a brumell as load baring, they will just pull out. Niot that you'd be near a brumell with this anyway.
It's a loverly rope to splice.
Tip - when starting a spliced extract about 30mm of the core and cut it off. Milk the cover back down the line. This gives you a little extra cover to get over the splice and will save a LOT of bad language and hair removal. With a polyester there is enough elasticity to do that but Umpy don't elastic. No worries taking 50 out if it works for you.
I'll get the lads to whip up a C1 and a C2.....bugger the test bed is being pimped so not working. But I'll do it as soon as and lets see the difference.
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Post by Punter on Feb 10, 2024 16:47:00 GMT 12
I'll get the lads to whip up a C1 and a C2.....bugger the test bed is being pimped so not working. But I'll do it as soon as and lets see the difference. Hi there. Wondering if the team made any progress on this? I have been sitting on my shiny new rope, keen to get it installed but don't want to rush it so happy to wait till the tests are done. |
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Post by GO30 on Feb 11, 2024 9:27:59 GMT 12
Ah ha, lifelines.
I knew I was going to check something but forget what it was, I was thinking SS joining links for some reason.
I have just the lad for this and I'll activate him tomorrow.
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dp
Full Member
Posts: 135
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Post by dp on Feb 11, 2024 9:49:07 GMT 12
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Post by GO30 on Feb 11, 2024 10:15:43 GMT 12
Opps  The same thing happened locally just before Xmas. A tang pulled off a cheap imported pullpit, whomever the welder was wasn't. |
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Post by Punter on Mar 17, 2024 9:52:34 GMT 12
Ah ha, lifelines. I knew I was going to check something but forget what it was, I was thinking SS joining links for some reason. I have just the lad for this and I'll activate him tomorrow. Hey GO30 was wondering if your team completed this? |
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Post by GO30 on Mar 18, 2024 22:39:27 GMT 12
Finished testing the new set up this evening, all working well finally. We'll have a sussing the morning.
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Post by GO30 on Mar 19, 2024 9:56:07 GMT 12
Ok so we got the bed working again. Spliced 2 strops each approx 1500mm long using Supercable78, continuous off the same reel. One strop had Class 2 splices each end the other Class 1 each end. All were soft eyes approx 50mm long. No stitching or locking was done. Loaded them in the bed. The splices connected to 10mm pins each end. The loop lengths meant the throat angle was nice and shallow. Class 1 strop went well, we could see the splices pulling in a little more under load, that is common and expected. No pinging heard which tells us no fibres were popping and the rope was very balanced. BOOM! On one end the splice failed. The splice itself stayed intact, it basically pulled out under load. That failure mode is not a surprise as Dyneema is a slippery bastard. The cell showed peak load was 1498 kilos. Class 2 was next under the exact same conditions. The load increased, the splices stayed stable and no pinging was heard until the very last moment and then only minimal. BOOM! she's gone. The core failed right on the end of the splices bury. That is the expected fail point. The cell showed 1810 kilos. As the cover was still intact we pushed the button again and the cover alone failed in the same area as the core did and as totally expected. The cell showed the cover alone held 886 kilos. So the conclusion is you can use either and get an OK load but for constancy and splice stability using a Class2 splice for Supercable is the better option. Armare say use a Class 2 as well.
Superable is one of the easiest ones to do a Class2 in which is damn handy.
In the next few days we'll do the same test again but using std polyester over polyester.
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Post by Punter on Mar 21, 2024 16:27:38 GMT 12
Thanks GO30 that awesome.
I need to swing past tomorrow and get some new rope for my lazy jacks so will drop a box of beer off for the team.
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Life lines
Mar 21, 2024 17:23:44 GMT 12
via mobile
Post by Admin on Mar 21, 2024 17:23:44 GMT 12
Thanks GO30 this is really helpful info to the wider sailing community and as a result this thread wins ‘Sticky Status’. 👏
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Post by em on Mar 21, 2024 19:39:27 GMT 12
Where do I send money for lifelines ? Got 3 fat blokes to keep on board
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Post by GO30 on Mar 23, 2024 10:26:58 GMT 12
Thanks GO30 that awesome. I need to swing past tomorrow and get some new rope for my lazy jacks so will drop a box of beer off for the team. Received and tested to much pleasure Thank you.
Looking forward to seeing your slim fit minimal windage beautifully spliced jacklines  |
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Post by GO30 on Mar 23, 2024 10:39:38 GMT 12
Where do I send money for lifelines ? Got 3 fat blokes to keep on board Here and lots of it, just start and I'll tell you when to stop. I've gone 'sticky status' now so I can up my rates
Got the string if you can splice them or can send ready to fit if you give me measurements.
To measure FOLLOW THE OLD ONES, don't go straight line. Measure baring point to baring point, we can back work the finished length from that.
What are they connecting to? How big are the holes thru your stanchions and is there and sharp on/in/around them?
Which ones need Pelican hooks, if any?
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