- Location
- Chattanooga
I\'m gonna try this as an adjustable tether...
THIS IS EXPERIMENTAL STUFF AND IS NOT APPROVED BY ANYONE OR ANY ORGANIZATION. ANYONE THAT USES THIS TECHNIQUE MUST REALIZE IT IS ESSENTIALLY UNTESTED AND HAS NO HISTORY OF USE IN THIS APPLICATION. USE AT YOUR OWN RISK, REALIZING THIS COULD FAIL RESULTING IN SERIOUS BODILY INJURY OR DEATH.
I'm not sure it offers any particular advantage over other methods, but I made this from a piece of Ice although the same thing could be done with Tenex.
It's simply a fixed eye, tucked tail, stitch locked for security, and a big eye on the other end - basically a homemade Whoopie (I think). At the time I made the pics, I hadn't back-spliced the tail; I'll do that before I climb on it. Here's a couple of pics:
Minimum length:
and maximum length for this length of cord:
I had to fold it to keep from having to back the camera off so far.
Testing:
I couldn't get the tensile machine to do cycle testing; it will, I just couldn't get it to today. However, I did run about a dozen tests manually.
I put the homemade Ice Whoopie in the machine and marked the tail of the eye at the tuck so I could see if it moved and I marked the tail of the adjustable loop where it exited so I could see if it moved.
I smoothed out the adjustable side a bit and applied tension to 300 lbs. I released it and did the same thing two more times.
Then I decided to try something more aggressive. I got some slack in the line and crumpled the eye splice and left it unstraightened and ran the tension up to 500 lbs. I repeated that about 9 or 10 more times, re-crumpling the eye before each loading.
Results:
The eye may have moved ever so slightly, it at all, but that's about it. The adjustable loop had a bit of creep, but I expected it to. I did not do a pull to destruction because this is the only piece I have, and I want to give it a test climb tonight so I didn't want it damaged.
Certainly a locked brumel would be a secure method, but they are big and ugly and add complexity to the splice and you still have to lock stitch it or whip it.
This is the second test I've done on cover only or hollow cover type splices that were secured only with lock stitching. I see absolutely no distortion in the stitching. I took a slightly different approach to the stitching pattern than I normally use.
It's a beautiful day here, the temperature is almost perfect; I'm going home shortly and try this thing on a climb.
Realize this is very minimal testing and far from exhaustive and once again,
THIS IS EXPERIMENTAL STUFF AND IS NOT APPROVED BY ANYONE OR ANY ORGANIZATION. ANYONE THAT USES THIS TECHNIQUE MUST REALIZE IT IS ESSENTIALLY UNTESTED AND HAS NO HISTORY OF USE IN THIS APPLICATION. USE AT YOUR OWN RISK, REALIZING THIS COULD FAIL RESULTING IN SERIOUS BODILY INJURY OR DEATH.
THIS IS EXPERIMENTAL STUFF AND IS NOT APPROVED BY ANYONE OR ANY ORGANIZATION. ANYONE THAT USES THIS TECHNIQUE MUST REALIZE IT IS ESSENTIALLY UNTESTED AND HAS NO HISTORY OF USE IN THIS APPLICATION. USE AT YOUR OWN RISK, REALIZING THIS COULD FAIL RESULTING IN SERIOUS BODILY INJURY OR DEATH.
I'm not sure it offers any particular advantage over other methods, but I made this from a piece of Ice although the same thing could be done with Tenex.
It's simply a fixed eye, tucked tail, stitch locked for security, and a big eye on the other end - basically a homemade Whoopie (I think). At the time I made the pics, I hadn't back-spliced the tail; I'll do that before I climb on it. Here's a couple of pics:
Minimum length:
and maximum length for this length of cord:
I had to fold it to keep from having to back the camera off so far.
Testing:
I couldn't get the tensile machine to do cycle testing; it will, I just couldn't get it to today. However, I did run about a dozen tests manually.
I put the homemade Ice Whoopie in the machine and marked the tail of the eye at the tuck so I could see if it moved and I marked the tail of the adjustable loop where it exited so I could see if it moved.
I smoothed out the adjustable side a bit and applied tension to 300 lbs. I released it and did the same thing two more times.
Then I decided to try something more aggressive. I got some slack in the line and crumpled the eye splice and left it unstraightened and ran the tension up to 500 lbs. I repeated that about 9 or 10 more times, re-crumpling the eye before each loading.
Results:
The eye may have moved ever so slightly, it at all, but that's about it. The adjustable loop had a bit of creep, but I expected it to. I did not do a pull to destruction because this is the only piece I have, and I want to give it a test climb tonight so I didn't want it damaged.
Certainly a locked brumel would be a secure method, but they are big and ugly and add complexity to the splice and you still have to lock stitch it or whip it.
This is the second test I've done on cover only or hollow cover type splices that were secured only with lock stitching. I see absolutely no distortion in the stitching. I took a slightly different approach to the stitching pattern than I normally use.
It's a beautiful day here, the temperature is almost perfect; I'm going home shortly and try this thing on a climb.
Realize this is very minimal testing and far from exhaustive and once again,
THIS IS EXPERIMENTAL STUFF AND IS NOT APPROVED BY ANYONE OR ANY ORGANIZATION. ANYONE THAT USES THIS TECHNIQUE MUST REALIZE IT IS ESSENTIALLY UNTESTED AND HAS NO HISTORY OF USE IN THIS APPLICATION. USE AT YOUR OWN RISK, REALIZING THIS COULD FAIL RESULTING IN SERIOUS BODILY INJURY OR DEATH.
