Is the super 8 or double figure of 8 redundant if one eye fails? ABOK 1085 names it Double Figure of 8. We show how to tie the bunny ears then pull it to 4kn and 9kn to see if we can untie it. Some knots are impossible to untie, and some are very easy to untie after being pulled. This was pretty much in the middle.
Then we pulled both ears and it broke in the knot at the same force we usually get with this rope at 18.30kN. We clipped one eye and it still broke in the knot at 17.33kN which is pretty much normal. The friction of the Beal Spelenium 10mm Static Rope doesn't let it slip to failure. So we tested it tied in dyneema because that will slip and show us how it would fail if it could slip. If you clip one eye, it turns into a normal figure 8 but if you clip the other like we did in our final test, it slipped to failure.
Behind the Scenes
I was very nervous releasing this as a knot break test video even though we have done knot videos in the past. In the past, the knot nerds came out with their pitch forks if we said or did anything wrong. They are a very engaged group apparently. So I want to make more videos if they are engaged but wasn't sure how it would go. It had 100% likes in the first 5000 views!
As far as the format goes, I wanted to test in just this one rope instead of introducing a whole bunch of different diameters and rope types. However, I do test it in dyneema to see what happens when you take friction out of the equation, not to test it as if you were to use dyneema yourself. Untying tests are also helpful because some knots are really easy and some really difficult and it's nice to see that characteristic within the video. This video was only 3 break tests as the ultimate experiment to see if simpler gets more views and I'll be comparing it to the next video we do on butterflies coming out soon with 10+ break tests. Originally I wanted to break 30 things for one video to comprehensively cover a knot, but the wet rope video below didn't do that well because we introduced too many variables in it. That video is rad go check it out, link below.
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