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2. Ropelength - Wikipedia

   en.wikipedia.org/wiki/Ropelength

   Can I tie a knot on a foot-long rope that is one inch thick? In terms of ropelength, this asks if there is a knot with ropelength 12 {\displaystyle 12} . The answer is no: an argument using quadrisecants shows that the ropelength of any nontrivial knot has to be at least 15.66 {\displaystyle 15.66} . [ 1 ]

3. Stopper knot - Wikipedia

   en.wikipedia.org/wiki/Stopper_knot

   A stopper knot (or simply stopper) is a knot that creates a fixed thicker point on an otherwise-uniform thickness rope for the purpose of preventing the rope, at that point, from slipping through a narrow passage, such as a hole in a block. To pass a rope through a block, or hole, is to reeve it. To pull it out is to unreeve it.

4. Hangman's knot - Wikipedia

   en.wikipedia.org/wiki/Hangman's_knot

   Hangman's rope displayed at the National Museum of Crime & Punishment, Washington, D.C. A label with the title "Hangman Rope/Noose" shown attached to the noose reads, "This hangman rope/noose was purportedly used at the historical Don Jail in Toronto, Canada to hang a man named Jan Ziolko in April of 1915."

5. List of friction hitch knots - Wikipedia

   en.wikipedia.org/wiki/List_of_friction_hitch_knots

   A friction hitch tied around a thicker rope that can slide while unloaded, but locks when loaded. Commonly used to back up belays. Similar to the Prusik only in function. French Prusik is equivalent to bi-directional Machard. Bachmann hitch: Blake's hitch: A friction hitch commonly used by arborists and tree climbers as an ascending knot.

6. Kernmantle rope - Wikipedia

   en.wikipedia.org/wiki/Kernmantle_rope

   A test of "single" standard rope involves tying an 80 kg (176 pound) weight to the end of a length of rope. This weight is then dropped 5 meters (16½ feet) on 2.7 meters (9 feet) of rope, with the rope running over a rounded surface simulating that of a standard carabiner. This process is repeated until the rope breaks.

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