Bradley Ford
ArboristSite Lurker
the hitch for descending SRT
I use "static" and "dynamic" below to indicate whether or not the rope moves through the tie in point (TIP) of the climbing system, not to describe the rope.
If a hitch could control descent on a static rope system of twice the maximum weight capability of either the Tautline (TLH) or Blake's (BH) hitch on the same rope (2 X (min(max TLH, max BH))), then would descending a static rope with this hitch be at least as safe as descending a dynamic rope system with a "frictionless" TIP and the corresponding TLH or BH? (Jepson implied that the answer is absolutely not: OK.....Let's Get Into The Meat Of SRT !!!!)
Ever measured the force required to pull a TLH or BH, complete with stopper knots, to failure on a static line? This force would provide an upper limit to how much the hitch can control in descent. So how much force did it take?
2000 lbs. was an arbitrary weight that I thought might be a safe parameter. I'm guessing the (2 X (min(max TLH, max BH))) weight is less than 2000 lbs, i.e. that the TLH can't control descent of 1000 lbs. on a static rope system.
I use "static" and "dynamic" below to indicate whether or not the rope moves through the tie in point (TIP) of the climbing system, not to describe the rope.
If a hitch could control descent on a static rope system of twice the maximum weight capability of either the Tautline (TLH) or Blake's (BH) hitch on the same rope (2 X (min(max TLH, max BH))), then would descending a static rope with this hitch be at least as safe as descending a dynamic rope system with a "frictionless" TIP and the corresponding TLH or BH? (Jepson implied that the answer is absolutely not: OK.....Let's Get Into The Meat Of SRT !!!!)
Ever measured the force required to pull a TLH or BH, complete with stopper knots, to failure on a static line? This force would provide an upper limit to how much the hitch can control in descent. So how much force did it take?
2000 lbs. was an arbitrary weight that I thought might be a safe parameter. I'm guessing the (2 X (min(max TLH, max BH))) weight is less than 2000 lbs, i.e. that the TLH can't control descent of 1000 lbs. on a static rope system.