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Topic Date User

rope jump 19-May-2007 At 8:18:49 AM TonyB

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It's interesting in looking at this video that most seem to have two equal length ropes. This actually doubles the dynamic force on the climber and the anchors. Unlike the static load which halves the tension in each rope, the dynamic tension in each of two equal length ropes stays the same as with a single rope. The second rope has been added I assume for safety reasons. A better approach would be to have a second rope about 10% longer than the first. If the first rope happens to break, the remaining energy of the fall will be absorbed by the second rope. This allows the normal rope elongation, rather than halving it as with two equal length ropes. Separate anchors should be used. Extra care is needed to avoid tangles or rubbing.