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2. Rope lock - Wikipedia

   en.wikipedia.org/wiki/Rope_lock

   Rope lock, with oval locking ring engaged. The padlock hole is visible at the base of the handle. Metal cams grip the rope. In a theater fly system, a rope lock is a device used to prevent a rope, and the line set it controls, from moving. A rope lock is controlled by a steel handle that engages the lock when vertical and releases it when ...

3. Block and tackle - Wikipedia

   en.wikipedia.org/wiki/Block_and_tackle

   The velocity ratio of a tackle is the ratio between the velocity of the hauling line to that of the hauled load. A line with a mechanical advantage of 4 has a velocity ratio of 4:1. In other words, to raise a load at 1 metre per second, the hauling part of the rope must be pulled at 4 metres per second.

4. Fly system - Wikipedia

   en.wikipedia.org/wiki/Fly_system

   The adjustable cam, or dog, inside the rope lock constricts and releases the operating line as the flyman lowers and raises a hand lever. Rope locks are mounted in series to the locking rail. A single rope lock can typically secure a static unbalanced load to 50 pounds (23 kg). Rope locks are not intended to slow a running line.

5. List of friction hitch knots - Wikipedia

   en.wikipedia.org/wiki/List_of_friction_hitch_knots

   A friction hitch or knot used to put a loop of cord around a rope, applied in climbing, canyoneering, mountaineering, caving, rope rescue, and by arborists. Rolling hitch (Taut-line hitch) Schwabisch hitch: A friction hitch tied around a thicker rope that can slide while unloaded, but locks when loaded. Similar to the Prusik: Todd-Kramer hitch

6. Worm, parcel and serve - Wikipedia

   en.wikipedia.org/wiki/Worm,_parcel_and_serve

   "Worming" the line is designed to fill in the channels (the contlines) between the strands in order to keep water out and to allow tighter, smoother wrapping of the next layers by giving the rope a more cylindrical shape. Lengths of "small stuff" or string are led along the lay of the rope between the strands, following the twist so that they ...

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8. Lock (water navigation) - Wikipedia

   en.wikipedia.org/wiki/Lock_(water_navigation)

   A 200-ton boat moving at a few miles an hour could destroy the lock gate. To prevent this, a rope was wound around the snubbing post as the boat entered the lock. Pulling on the rope slowed the boat, due to the friction of the rope against the post. [26] A rope 2 + 1 ⁄ 2 inches (6.4 cm) in diameter and about 60 feet (18 meters) long was ...

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