qqac
Jun 5, 2008, 9:10 PM
Views: 14610
Registered: Oct 25, 2005
Posts: 32
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Unless I'm tying it differently, I think your original rig does slide. What I'm finding is that two strands of the powerpoint slide trough the left side DF knot, and the other two strands of the powerpoint slide through the right side DF knot. It's just that with the friction from the DF knots, the powerpoint loop doesn't slide under relatively low loads, such as the impromptu hand-foot pull test. With higher loads, the two DF knots may pull together with the sliding and shortening of the top two strands in the powerpoint loop. The positive here is that this sliding would help absorb/dispel energy; the negative is that the sliding through the DF knots would create heat and friction from that energy, weakening the DF knots and potentially cutting them from inside. As you say, testing would answer those questions.
(This post was edited by qqac on Jun 5, 2008, 9:16 PM)
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