Addressing hitch binding with the Rope Wrench on descent

Discussion in 'Stationary Rope Technique-Half the rope, twice the' started by moss, Feb 4, 2016.

  1. John@TreeXP

    John@TreeXP Member

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    Thanks, Tim. Good advice for sure and I do appreciate the economic benefits of using double fisherman's knots. I also called a couple places and at Bartlett, without saying there's a definitive answer, it's pretty clear that a 28" eye&eye, is the proper length for a VT tied RW. Alternatively, I was told that a 30" may work well too, if tied in a Distel hitch or as Moss recommended, a Michoan, Cooper's Hitch. What's even more perplexing is how none of this relevant info is included in either the RW's or the eye&eye's marketing material and/or information.
     
  2. moss

    moss Well-Known Member

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    There's probably a bias assuming that anyone purchasing a RW already knows a fair amount about different kinds of hitches and cords. Michoacan or Cooper's probably best. For a 30" E-2-E Cooper's is very good, try 5 coils and two twists, add or subtract twists to tune it for your rope. VT not great because the #1 hitch rule for the wrench is it must always set unassisted when you weight your system, VT doesn't "auto-set" very well on single rope.
    -AJ
     
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  3. John@TreeXP

    John@TreeXP Member

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    A Michoacan hitch seems like it'll work perfectly with my 30" cords. From what I dug up online, the Cooper's seems similar to the VT, and the Michoacan is more like a Blakes, but with a better balanced tie in. I'm grateful for everyone's assistance and expertise on the matter.

    Not sure if this is a Michoacan, but it looks like a good RW option too.
     
  4. surveyor

    surveyor Well-Known Member

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    That looks like an interesting hitch. I like the way it forms two parts, with the wraps above and the base below. As long as the base does not cinch up so tight that it becomes hard to tend and works to push the top part of the hitch upon ascent.
     
  5. WaitakKauri

    WaitakKauri Well-Known Member

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    Echoing surveyor, the cosmo looks interesting.

    Check out the resources on the main TreeBuzz homepage (not the forms). There are some good pdfs with the major hitches including some interesting history. I really like the knut, but recommend a shorter length than 30" on 11mm.
     
  6. Brocky

    Brocky Well-Known Member

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    I played with it some and wasn't impressed. The lower part separates too much from the wraps. Cycling it up and down a few times the bottom would loosen up and separate causing it to slip a few inches before grabbing.
    In the video the legs are brought together parallel to each other but tend to want to be crossed instead. After I tried crossing the ends it worked a little better but would still slip.
     
  7. WaitakKauri

    WaitakKauri Well-Known Member

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    Thanks for this feedback Brocky
     
    Last edited: Apr 6, 2017
  8. Brocky

    Brocky Well-Known Member

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    I'm going to test some more with real short legs, that may help it from spreading too far apart. I think this shows how it is tied. IMG_1081.JPG

    From previous testing, the left eye seems to want to cross the right one. It didn't seem to help with holding. Also tried the right eye over the left, no better. One other modification I tried was putting the left eye behind the bottom loop, about the same results.
     
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  9. Brocky

    Brocky Well-Known Member

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    Well, just tried it again and had no slipping. I must not have had the tension in the two legs equalized on my previous attempts. All the variations worked.
     
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  10. Brocky

    Brocky Well-Known Member

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    I added another wrap from what is shown in the video and it works very good. If it were used on a lanyard it can be tended by just pulling up on the rope, nothing else needed.
     
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  11. SpaceGhost

    SpaceGhost Active Member

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    Using a CT fixe pulley with the rope wrench made it work for me. It moves the legs slightly closer together and for whatever reason it functions perfectly now with a 3/2 VT. I am wrenching 28" 8mm beeline spliced on 10mm HTP and Escalator.
     
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