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Knot Tie-ing: Adjustable loop and knot that gets more secure as its pulled

  1. Oct 24, 2011 #1
    I do some rock climbing, and the most common knot you see is the double-figure 8:
    BunnyEar1l.JPG

    That's because you can tie it at any point in the rope to create a loop for other climbers to latch into. It also gets tighter as you pull from any direction: the loop or either of the two single ropes coming out.

    However, I am often faced with a different problem:

    Say you have an infinitely long pole that you need to tie a rope around. You have to make a loop that will grip the pole tighter as the rope is pulled. You have access to one end of the rope, not both. You also need a knot that has this property of getting tighter as the rope is pulled.

    Is there any such knot that fits this description?
     
  2. jcsd
  3. Oct 24, 2011 #2

    chiro

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    I think I know the knot you are talking about, but I can't draw or remember the name :(

    Its basically a situation where you have the main line (rope going to you) sandwiched inbetween two other pieces of rope, and a knot is formed with these two pieces near the pole.

    I'd be easy to video conference and show you a crappy demo, but I don't think I can do that. It might be easier if I just told you to ask the guy with the face for some advice ;)
     
  4. Oct 24, 2011 #3
    Would this one do?
     
  5. Oct 24, 2011 #4
  6. Oct 24, 2011 #5

    Gokul43201

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    It might help if you described the actual situation where you'd need such a knot, but I suspect the thing you are looking for may be a taut-line hitch (or adjustable hitch). The bowline is a very secure way to tie in to a pole with access to one rope-end, but the loop does not tighten on the pole. With access to both ends of the rope, you could tie a prusik or klemheist or other similar friction hitch.
     
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