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  1. W

    Rope Wrench - Hitch/Rope compendium.

    Not the answer I was expecting. I thought it might do the tending in that placement but I am guessing it cannot gab the rope without tension below it? So it would always take two hands to lower, one to work the hitch and the other to brake. By the way if these weird questions should be kept...
  2. W

    Rope Wrench - Hitch/Rope compendium.

    Why is a Rope Wrench always placed above the hitch and not below it?
  3. W

    Vacuum cannon for line launching?

    It occurs to me that a spool could be put inside the piston but that would introduce an additional volume of air that would probably make the whole thing inefficient.
  4. W

    Why no hitch for SRT?

    Is there a post that explains this and why it works?
  5. W

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

    That's the first time I have seen a Wild Country Hand. What do you use it for?
  6. W

    Documenting my hand-sewn eye process

    Do you think that adding mechanical interlocking to a friction hitch has promise? If the cover strands are buried either into the other side of the rope, or folded back over the top of the friction hitch and buried above it, or any other such configuration where they would have to pull out for...
  7. W

    Sticht Hitch

    What is the function of crossing the cord below the coil before it enters the ring for the first time?
  8. W

    Electrolyte supplements?

    I have only tried a few. "Key Nutrients Electrolytes Powder" is the first one that worked and I stopped looking. My use was a water fast with this the only thing besides water that I consumed. If you have tried it I wonder how it compares to others.
  9. W

    Rope Wrench - Hitch/Rope compendium.

    What is LOTS type tending?
  10. W

    New to the forum, new to trees

    I decided to splurge on a 28" 8mm HRC eye-to-eye from ArbSession. I hope it was a wise choice.
  11. W

    Documenting my hand-sewn eye process

    I will do that when I can. A hand-tight section about 1.25" long made of 550 cord on a 10mm rope makes an interesting low profile adjustable loop. Certainly not something for life support but the friction hitch effect is very apparent. Pulled far tighter while it is formed it would be...
  12. W

    Documenting my hand-sewn eye process

    I read this whole thread with interest. I have done neither splicing nor stitching and it stimulated thoughts about how all this works. One of these, impractical as it is: A friction hitch can hold quite a lot, enough indeed to be a life support implement. Why could not the same mechanism be...
  13. W

    New to the forum, new to trees

    I found a 15% off coupon but the only free shipping I see is $100+?
  14. W

    New to the forum, new to trees

    I only bought enough 8mm Ocean Polyester for one hitch and I already have the Blue Water cord. Shipping is prohibitive if it's the only item I am ordering.
  15. W

    New to the forum, new to trees

    Would you trust Blue Water 7mm Dynamic Prusik Cord as hitch cord on a 20 foot lanyard? Elongation: @ 300 lbf = 17.9% @ 600 lbf = 29.0% @1000 lbf = 38.8% Diameter: 7mm Grams Per Meter: 35 Tensile Strength: 2,360 lbf (10.4 kN)
  16. W

    Sanitizing Pruning Tools

    This link is dead. Do you have a copy or know where to find one?
  17. W

    Forces on a cinched carabiner

    I think that tail support from the rope thickness is going to be necessary to model. It may be germane to note that the second pull test on the same carabiner but using a 6mm HMPE cord instead of a rope resulted in a break at 15.8 kN. I had assumed that the first pull to 18 kN which resulted...
  18. W

    Forces on a cinched carabiner

    Continuing the effort I found high resolution reference photos of a Blue Water carabiner of similar appearance. Measuring pixels from those I got 11.7mm by 9.6mm for the spine which is remarkably close to the BD carabiner. I suspect both were made by Omega Pacific. My scaling up the thickness...
  19. W

    Forces on a cinched carabiner

    The Black Diamond oval I used as a physical reference only has rated strengths of 18, 7, 6 kN which is a lot less than the 26, 9, 9 stamped on the Blue Water carabiner. An oval has a weaker geometry but I think this is just a less robust carabiner in general. If I scale up my cross section by...
  20. W

    Forces on a cinched carabiner

    @Bart_ I tried to do as you proposed in post #10 for parameters estimated from the first test in the video. I calculate a stress in excess of 1 GPa which is greater than the ultimate strength of 7075-T6 at around 0.5 GPa I believe, so something must be off but I am in the ballpark. I don't...

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