Thanks a lot!!!edt wrote: ↑Sat Oct 26, 2019 3:19 pmthose standard pigtails start out about 8 times overstrength, you have about 3mm diameter lines, which is about twice as strong as 1.75mm kite line, then you double it because it's a loop. The short bury/stitching honestly any method used to make these pigtails is inconsequential here. The reason for the amount of overstrength is the same reasoning they use making the chicken line 3 or 4 tons overstrength the extra strength is here just because you expect wear on the pigtails and they make them stronger than needed so they last a bit longer. So basically use anything you want, make whatever you want, keep in mind knots reduce line strength by half but it's fine if you are at least 2x overstrength, but usually pigtails are way stronger than that.matanshapira wrote: ↑Sat Oct 26, 2019 11:07 amYou wouldn't buy those?
https://kiteboarding.com/products.asp?cat=Pigtails
matanshapira's original question is good tho, I have had knots fail on my pigtails because I failed to tighten them enough, always remember how slippery dyneema is.
Knots start where?matanshapira wrote: ↑Sat Oct 26, 2019 7:00 pmThanks a lot!!!edt wrote: ↑Sat Oct 26, 2019 3:19 pmthose standard pigtails start out about 8 times overstrength, you have about 3mm diameter lines, which is about twice as strong as 1.75mm kite line, then you double it because it's a loop. The short bury/stitching honestly any method used to make these pigtails is inconsequential here. The reason for the amount of overstrength is the same reasoning they use making the chicken line 3 or 4 tons overstrength the extra strength is here just because you expect wear on the pigtails and they make them stronger than needed so they last a bit longer. So basically use anything you want, make whatever you want, keep in mind knots reduce line strength by half but it's fine if you are at least 2x overstrength, but usually pigtails are way stronger than that.matanshapira wrote: ↑Sat Oct 26, 2019 11:07 amYou wouldn't buy those?
https://kiteboarding.com/products.asp?cat=Pigtails
matanshapira's original question is good tho, I have had knots fail on my pigtails because I failed to tighten them enough, always remember how slippery dyneema is.
Just to clarify, say I use 3mm line with only 6cm of bury(Brummel splice) and no stitching. Knots start only after the bury. Will it hold? Why?
It's a part for a Cloud kite bridle that looks like a slingshot pigtail, I checked the details of what I made:Kamikuza wrote: ↑Sun Oct 27, 2019 5:16 amKnots start where?matanshapira wrote: ↑Sat Oct 26, 2019 7:00 pmThanks a lot!!!edt wrote: ↑Sat Oct 26, 2019 3:19 pm
those standard pigtails start out about 8 times overstrength, you have about 3mm diameter lines, which is about twice as strong as 1.75mm kite line, then you double it because it's a loop. The short bury/stitching honestly any method used to make these pigtails is inconsequential here. The reason for the amount of overstrength is the same reasoning they use making the chicken line 3 or 4 tons overstrength the extra strength is here just because you expect wear on the pigtails and they make them stronger than needed so they last a bit longer. So basically use anything you want, make whatever you want, keep in mind knots reduce line strength by half but it's fine if you are at least 2x overstrength, but usually pigtails are way stronger than that.
matanshapira's original question is good tho, I have had knots fail on my pigtails because I failed to tighten them enough, always remember how slippery dyneema is.
Just to clarify, say I use 3mm line with only 6cm of bury(Brummel splice) and no stitching. Knots start only after the bury. Will it hold? Why?
It’ll hold. Depending on your design
Yes, one end and loops below that.Kamikuza wrote: ↑Sun Oct 27, 2019 6:25 amSo you’re only splicing a loop in one end? And the knots are below that?
Burying the tail stops the eye slipping through the Lark’s head. Brummell or stitching stops the tail coming out when the line is unloaded.
Manufacturers can save some money I guess by providing pigtails at less than 100% of breaking load — but still well above the flying line’s breaking load. So long as the tail can’t move, the whole thing is secure.
IIRC someone did a test and Brummell only, no bury, was still 80% of the breaking load.
IIRC again, it stretched the holes somewhat and then snapped at the splice. There was video of the test too, but I'll never find it again I'm surematanshapira wrote: ↑Sun Oct 27, 2019 6:31 amYes, one end and loops below that.
So it'll hold according to his test, thanks a lot.
I guess that with a really small bury the strands might seperate and slide through the splice, just a theory
I guess that would work. Wouldn't want to be the guy doing the job thoughnixmatters wrote: ↑Sun Oct 27, 2019 6:41 amSlightly off topic - that seems like a Brummel splice, doesn't it?
I wonder how they managed to get perfectly equal length and tension on all their 'lines'?!
https://bikerumor.com/2019/10/12/frm-we ... tain-bike/
Users browsing this forum: Yahoo [Bot] and 197 guests