Bow String Knot

This is where we discuss the craft of bow and arrow making.
pcoutin
Posts: 150
Joined: Thu Dec 03, 2015 11:40 am
Location: California
Contact:

Post by pcoutin » Thu Jun 30, 2016 7:16 am

osmiu wrote:the one and only knot that don't fail on me on knotted loops of strings made of fastflight at 85-90 lbl is this knot :
http://www.youtube.com/watch?v=ocpKLPX1tnU
I don't follow... are there any more comprehensive sources on this? There was one picture but I still didn't understand it. It seems like a double loop that's more complicated than the "Turkish" knot.

I'm wondering whether, with "fast flight" (polyethylene: dyneema or spectra) reverse twisted ends padded with a few strands of nylon or B-50, the knot in the OP would hold at heavier draw weights without any slipping

might try serving. should just make an endless jig but the possibility of being able to make strings more easily with less tools is interesting..
User avatar
Bede
Posts: 2360
Joined: Mon Mar 14, 2005 11:57 am
Location: Sydney, Australia

Post by Bede » Tue Jul 05, 2016 1:53 pm

I have not had a string break with that knot near the knot. My gut string broke about ten inches from the loop after about three or four years of use.
Bede
pcoutin
Posts: 150
Joined: Thu Dec 03, 2015 11:40 am
Location: California
Contact:

Post by pcoutin » Sat Jul 09, 2016 5:22 am

Especially with modern materials, breakage should not be a concern since they almost have to be very overbuilt. One strand of D-97 can take over 100 pounds.

I was wondering if you've made a knotted string like that with slippery dyneema/spectra just by serving the loop area? Hm, with a jig and some experience it may not be as worth it.

wonder if small game gut would be any good...

isn't it very bad for a hornbow to suddenly unbrace though?
pcoutin
Posts: 150
Joined: Thu Dec 03, 2015 11:40 am
Location: California
Contact:

Post by pcoutin » Tue Jul 26, 2016 4:16 am

12 strands of D-10, heated up with a lighter at the knot. Loop ends reverse twisted, not served. It curls up a lot when burned. Seemed to hold with a 35-40# crude PVC bow. Maybe a soldering iron would make more sense to make the knot permanent? Could be a waste of string material...

Should've padded the loop ends with a couple of strands of nylon..
pcoutin
Posts: 150
Joined: Thu Dec 03, 2015 11:40 am
Location: California
Contact:

Post by pcoutin » Wed Nov 16, 2016 6:24 am

10 strands of D-97. Around 6" brace height. Song Mu Gung korean bow 41# - 56# depending on draw length.
After checking knots by bracing & pulling the bow, burned off tag ends and saturated knots in thin CA glue (superglue)
(I did this knot instead of the Korean knot this time because this knot is adjustable and I wouldn't have to make a precise main string ... also, it's easier...)
Will REALLY test it at the range soon...
What material did it break with? I really hope it won't break with this UHMWPE (D 97)...
pcoutin
Posts: 150
Joined: Thu Dec 03, 2015 11:40 am
Location: California
Contact:

Post by pcoutin » Mon Jan 23, 2017 4:37 am

No problems with this knot so far. Although the tag end is burnt and the knot is covered in thin CA glue (which I don't recommend anymore though), so..

Can anyone identify the knots in this page? I'm not sure if those strings are actual artifacts used with Magyar bows in the 9th-11th centuries. http://magyarij.hu/index.php/amagyarij/reszei/ideg.html
Post Reply