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The Official Table of Drops, formerly issued by the British Home Office, is a manual which is used to calculate the appropriate length of rope for long drop hangings. Following a series of failed hangings, including those of John Babbacombe Lee , a committee chaired by Henry Bruce, 1st Baron Aberdare was formed in 1886 to discover and report on ...
The ropelength of a knotted curve is defined as the ratio () = / (), where is the length of and () is the knot thickness of . Ropelength can be turned into a knot invariant by defining the ropelength of a knot K {\displaystyle K} to be the minimum ropelength over all curves that realize K {\displaystyle K} .
The climber will fall about the same height h in both cases, but they will be subjected to a greater force at position 1, due to the greater fall factor.. In lead climbing using a dynamic rope, the fall factor (f) is the ratio of the height (h) a climber falls before the climber's rope begins to stretch and the rope length (L) available to absorb the energy of the fall,
In addition to holding rope open to assist the creation of a rope splice, modern push fids have markings for precise measurements in a variety of sizes of rope. The length of these fids is typically 21 or 22 times the diameter of rope to be spliced. A one-half-inch (12.7 mm) diameter rope would have any accompanying fid 10.5–11 in (266.7 ...
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A single-pitch route can range from 7 metres (23 ft) to the full length of the climbing rope (by definition, the longest belay of a 'leader' is limited by the length of the rope). In the 1960s to the 1980s, climbing ropes were typically 50 metres (160 ft) in length, however, modern ropes are typically 60–70 metres (200–230 ft) in length ...
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