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  1. W

    Knee Ascender

    Do the Turbo rollers really make a lot of difference vs a CT foot ascender or is it just icing on the cake?
  2. W

    Knee Ascender

    There is still a foot loop on this unless I am seeing it wrong? @It'smeLevi is this the setup you mean or is your system attached ONLY at the knee?
  3. W

    Sticht Hitch

    I think tied the stopper on the Soft Sticht correctly for the first time today. Before I put the strands on the outside of the cross as in #289 but today I passed the tails through an eye formed between the crossing strands which I think is what you show in #326. That makes for better tending...
  4. W

    Knee Ascender

    I've never seen something like that. How wide was the webbing, and did you pad it?
  5. W

    Knee Ascender

    What took the place of the foot loop? You were stepping down on something I presume, as a strap on the knee taking full body weight doesn't sound pleasant.
  6. W

    Sticht Hitch

    I feel like I am failing a basic intelligence test here. What is the difference between the Lock and Release modes in the lower right?
  7. W

    Forces on a cinched carabiner

    I think I already have this. In the images in post #23 and you will see that the first one has more tension on the yellow side while the second one has more tension on the green side. According to my simulation high bollard friction makes it easy to break a carabiner as the system will support...
  8. W

    Fallen red-shouldered hawk nestling put back up

    It is important to distinguish chirality from different structural forms of the knot. Strictly speaking according to convention the bend you tied is not a double fisherman's as it has a different structural form. When you refer to a left-sided bowline do you mean an identical knot reflected...
  9. W

    Fallen red-shouldered hawk nestling put back up

    Okay. I always tie it with the nesting coils as that is what I have seen pull tested, and it's the "correct" way in books and guides. Do you find a benefit to doing it the other way?
  10. W

    Fallen red-shouldered hawk nestling put back up

    Pedantic but I think the double fisherman's knot at 1:20 was tied incorrectly. That coil should have been wrapped the other way. "Tying knots while talking" as you said.
  11. W

    Forces on a cinched carabiner

    I tried this physically now as I wanted to get a feel for it. I see how the friction can be used to hold more tension within the loop than the system settles into naturally, by manually cinching it down. Does this have real-world implications however? I could not produce the effect by merely...
  12. W

    Forces on a cinched carabiner

    @Bart_ thanks for the longer explanation. That's going to take me some thinking and maybe a bit of experimentation, then I'll try to extend my model. You're referring to this post I think?
  13. W

    New Tribe Onyx Saddle discussion in light of the newest saddle releases

    "Not life support" is normal for foot and knee ascenders so that's still no apparent downside. I'll have to try one eventually.
  14. W

    Forces on a cinched carabiner

    For this geometry and rope-bollard mu of 0.085 representing a slick rope around a steel bollard the system can be at equilibrium between these two limits. Angles outside this range would require more tension to be carried by friction than I calculate as possible.
  15. W

    Forces on a cinched carabiner

    @Bart_ I have it structured a little differently. Seeking a geometry with simple math I made the bollard a unit circle and fixed the carabiner in a horizontal orientation, then figured out the rope alignment and tensions from there. Of course it is more complicated now but I think it was a...
  16. W

    New Tribe Onyx Saddle discussion in light of the newest saddle releases

    I think I found the part and it sells for $20 and weighs 45 grams. I suppose there must be a downside or everyone would be using one?
  17. W

    New Tribe Onyx Saddle discussion in light of the newest saddle releases

    What is that and how does it work? Is there a cam or is it passive?
  18. W

    Forces on a cinched carabiner

    The model now corresponds to the observed case of no contact between the carabiner and bollard due to rope thickness. Also a configuration similar to the 35 kN pull at 5:40 in the video with the exception of the T-shaped cross section that I have not yet modeled.
  19. W

    Forces on a cinched carabiner

    This update was a lot of work because most of the trig simplifications I used to set up the original broke down when I added dimension to the rope and carabiner. Nevertheless it was worth it as tail support from rope thickness seems to be a very significant factor. There are bugs to work out...
  20. W

    Rope Wrench - Hitch/Rope compendium.

    How does that relate to its placement relative to the hitch? I don't see how placing it below could cause the hitch to fail.

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