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With a traverse-rope fixed between two anchor points — ideally under some tension — the climber attaches to the rope using a short quickdraw (or equivalent alternative) that is attached to their harness. A backup attachment loop using carabiners and slings is also recommended. Any backpacks are separately clipped to the rope and also ...
Sit-stand systems (also known as frog rig) - one ascender is at chest level attached to the sit harness, and a second is held in the hand with a long loop of rope for the feet. Movement up the rope is by repeated moving of the foot loop ascender up the rope, pushing up with both feet together, and sitting, supported by the chest ascender.
An ideal block and tackle with a moving block supported by n rope sections has the mechanical advantage (MA), = =, where F A is the hauling (or input) force and F B is the load. Consider the set of pulleys that form the moving block and the parts of the rope that support this block.
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where is the applied tension on the line, is the resulting force exerted at the other side of the capstan, is the coefficient of friction between the rope and capstan materials, and is the total angle swept by all turns of the rope, measured in radians (i.e., with one full turn the angle =).
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An adjustable loop knot for use on lines under tension. Munter hitch: A simple knot, commonly used by climbers and cavers as part of a life-lining or belay system: Ossel hitch: A knot used to attach a rope or line to an object. Palomar knot: A knot that is used for securing a fishing line to a fishing lure, snap or swivel. Pile hitch