Here you can exchange your experience and datas about your home build boards
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kjorn
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Postby kjorn » Thu Jul 16, 2020 2:20 am
I fucked up. I bought 1.5mm dyneema for pigtails not realising quite how thin 1.5mm is. It seems thinner than my actual kite lines.
Can I still use it? It's unsleeved...
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nixmatters
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Postby nixmatters » Thu Jul 16, 2020 12:58 pm
What Dyneema line is it?
I mocked up a pigtail with 1,3mm 300kg line and it looks really sweet:
viewtopic.php?t=2407067&start=10
Haven't tested it yet
Just make few extra sets and replace when you get signs of wear.
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BillyGoatGruff
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Postby BillyGoatGruff » Thu Jul 16, 2020 1:17 pm
No. Use minimum 3mm to 4mm for pigtails. Try and get Dyneema SK99 (super strong stuff)
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nixmatters
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Postby nixmatters » Thu Jul 16, 2020 1:30 pm
BillyGoatGruff wrote: ↑Thu Jul 16, 2020 1:17 pm
No. Use minimum 3mm to 4mm for pigtails. Try and get Dyneema SK99 (super strong stuff)
I'd argue here. SK99 is absolutely not necessary if you use a thicker line. Abrasion resistance is much more important and SK99 has less of it than SK75, SK78 or Spectra 1000.
SK99 is just a bit stonger than above mentioned alternatives and has slightly lower elongation, which irrelevant for pigtails.
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Onda
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Postby Onda » Thu Jul 16, 2020 3:00 pm
Strength of any 1.5 mm Dyneema is more than enough. Particularly if you use a loop as pigtail (2 x the line, only half of the total load per line).
Only issue could be the cutting effect of such a thin line. It might cut the other line (to which the pigtail is connected) under high load?
3 mm line is ideal for making pigtails out of it.
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kjorn
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Postby kjorn » Thu Jul 16, 2020 9:16 pm
It's for break lines on my high wind kite....
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merl
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Postby merl » Thu Jul 16, 2020 9:42 pm
BillyGoatGruff wrote: ↑Thu Jul 16, 2020 1:17 pm
No. Use minimum 3mm to 4mm for pigtails. Try and get Dyneema SK99 (super strong stuff)
4mm? You must be joking!
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BillyGoatGruff
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Postby BillyGoatGruff » Thu Jul 16, 2020 10:07 pm
4mm? You must be joking!
Not at all...get your kite out and measure the kite pigtails... they sure aren't 1.5mm. Most are probably around the 3mm mark, my Torch is 3.5mm.
I found this from a previous kiteforum search: (spot on advice as you are specking for abrasion by salt & sand and shock loads):
The reason to overspec pigtails is that they are constantly flexed around small diameters and get sand in them. They can get pretty soft and fuzzy after a bit. 2.5mm is ok in initial strength, but how long will you trust it?
3-4mm can last years, so not a bad idea if you kite in sandy areas, or get bored splicing new pigtails...
Top
viewtopic.php?t=2394042
Last edited by
BillyGoatGruff on Thu Jul 16, 2020 10:15 pm, edited 1 time in total.
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BillyGoatGruff
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Postby BillyGoatGruff » Thu Jul 16, 2020 10:11 pm
Strength of any 1.5 mm Dyneema is more than enough
... average breaking strain of SK75 1.5mm = 280kg..
I'm sticking with 3mm+.
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merl
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Postby merl » Thu Jul 16, 2020 10:51 pm
BillyGoatGruff wrote: ↑Thu Jul 16, 2020 10:07 pm
4mm? You must be joking!
Not at all...get your kite out and measure the kite pigtails... they sure aren't 1.5mm. Most are probably around the 3mm mark, my Torch is 3.5mm.
viewtopic.php?t=2394042
I never said pigtails should be 1.5mm. I'm saying that 4mm line is ridiculously over dimentioned for pigtails is all. Same comments in the thread you just linked.
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