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Best knots for undoing after being pulled really tight

Discussion in 'General Discussion' started by Canyonero, Oct 22, 2018.

  1. Canyonero

    Canyonero

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    Hypothetical situation. You have to pull a rope with a jeep because it is a really tough pull. But you first had to join two ropes together to reach the jeep. What knot do you use to tie the ropes together and how do you attach the rope to the jeep if you want to be able to undo the knots quickly and efficiently?
    Last edited: Oct 22, 2018
  2. Sonny Lawrence

    Sonny Lawrence

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    Sheet bend and high strength tie off.
  3. Canyonero

    Canyonero

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  4. Canyonero

    Canyonero

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    Never mind, that doesn't look like it gets weighted.
    hank moon likes this.
  5. Canyon Monkey

    Canyon Monkey Useful Idiot

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    Zeppelin Bend
    locro, Kuenn and Bootboy like this.
  6. Canyonero

    Canyonero

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  7. hank moon

    hank moon kinetically bulbous

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    I wondered the same. Have used that rig for many years w/o the overhand and w/o issue.
  8. Bootboy

    Bootboy Atwood Gear

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    +1 for the Zeppelin bend
  9. ratagonia

    ratagonia

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    Fisherpersoned Square Knot for the Bend; Bunny Ears Figure 8 for attaching to the jeep.

    Make sure you use the end of the rope in each case, so if you have to cut it off, you won't lose much.

    Tom
    Last edited: Oct 22, 2018
  10. Canyonero

    Canyonero

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    The bunny ears 8 doesn't tighten up like a regular eight? Sure looks like it would.

    And I can't seem to find a photo of a fisherman'd Square Knot. Can you describe? Is it a square knot with the tails fishermanned?
  11. ratagonia

    ratagonia

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    I think the Bunny Ears tightens up half of what a regular Fig 8 on a bight would. I have used it to tow someone out of the sand... I don't remember whether I was able to untie it.

    Yes, here is a picture.

    Fisherpersons square knot bend.
  12. Sonny Lawrence

    Sonny Lawrence

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    It is just a way to secure the end. Any way could work. Once I saw a SAR instructor simply lay the tail of the rope over the loaded side, no connection at all. If there are enough wraps to prevent the rope from sliding around the anchor, there is no force on the tail.
  13. Canyonero

    Canyonero

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    Half is more than I'm interested in! I think I'll go with the tensionless hitch/high strength tie off for that application.

    The square fisherman looks like it could be hard to untie. I mean, it's basically just a square knot. Everything I'm reading on it says it is easier to untie than many knots, but I'm skeptical it would be a better choice than the Zeppelin or even the Sheet Bend. Is there anyway to quantify this other than, you know, tightening down a bunch of knots and timing how long it takes to undo them? Has anyone done that?
  14. ratagonia

    ratagonia

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    You will be happy to learn that this avenue of investigation is unexplored. Master's Thesis?

    t
  15. Canyonero

    Canyonero

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    The last thing I need is another degree. Maybe a project for an old rope.
  16. hank moon

    hank moon kinetically bulbous

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    Casual front yard experiment with sheet bend, zeppelin bend and square knot. Rope: retired Bluewater Canyon Pro (super stiff).

    Test method: 8" of slack in joined rope; car parked on 5° slope. Put car in neutral, car rolls backward, knots tighten.

    Results: Square knot by far hardest to untie, then sheet bend, then zeppelin. Note: only a slight difference between the latter two. Side note: the two bowlines, loaded multiple times, were the easiest to untie.

    PA255029.JPG

    PA255030.JPG
  17. Canyonero

    Canyonero

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    Thanks for doing that. Where do I send your Master's degree?

    But it gives me the question, "Well what about joining the ropes with two bowline loops then if that's easier to untie than a Zeppelin?"
  18. CRNPRES

    CRNPRES

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    I second Bowline!
  19. hank moon

    hank moon kinetically bulbous

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    Why knot? But...maybe the easiest would be toggling with a suitable lug wrench?

    Now that's a stuck rope! :)
  20. Scott Patterson

    Scott Patterson

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    What about using a sliding friction knot such as the Klemheist? In theory you could use it to tie two ropes together and it should be easier to untie (or so it seems) than other knots after being weighted.
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