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发表于 2017-6-9 14:20:05
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Aid climbing on The Grand Wall - Part 3 - Four parts of the rappel system are there for a good reason.
After we dropped the main rappel rope down from Station 9 at the top of "Nubian Queen Roof" we couldn't see if it reaches the rock down below - from 50 m above it was actually hard to tell. Even if it did, it would land on bare granite face not on the dyke, so we won't have any bolts to reset the rappel from. So we again, took the emergency 7mm 90m rope out and then extended the blue one. Now it looked good, so we dropped it. Looking down, I said, "oh, there is a knot". I think by then we were already too tired, physically and mentally, besides, we already could see the base, it was so close! We should have fixed the knot right away, but we didn't. Vera actually thought I meant the stop knot. And I meant to undo it later.
So after being busy with standard check - gloves on, backup prusik locks, rappel rope through belay device, harness buckle double-backed, I looked back and didn't see the knot anymore, started down. Passing midair The Gargoyles, I suddenly saw it again, "OMG, the knot!" I was supposed to lock the belay device right away and undo the knot asap, but at the same time remembering that the ropes above me were rubbing against the roof edge and could be shredded easily; I have seen it being done in the past. For the same reason, the "bible" is against "Rambo" style rappelling - avoid hard shocks, jumps and jerks - they all will cause wearing the rope. So I wanted to get ropes unload off the edge asap so kept going down hoping to touch the rock first and deal with the knot down there. The knot was approaching fast too. Once I touched the rock, the knot was already so close, but the rock was still too steep - every-time trying to lock the belay device would slip me down towards the knot - locking belay device doesn't work in free air either! Eventually, I saw the knot right next to me, and it was about to get jammed hard in my belay device, so as Vera did earlier on Pitch 5, I deliberately locked my backup prusik. After the prusik was well loaded, the knot ended right below the belay device, touching it, but luckily it didn't get stuck inside jamming only maybe 30%. So now I was hanging on the backup prusik, having unloaded belay device with partially jammed knot in it. I radioed Vera: "I have to undo the knot". She radioed back "OK". From Pitch 5 I knew that the countdown had begun - my legs will soon become numb from the harness pressure, I'd better finish my business quickly. To be continued (hopefully..)
PHOTO: the Nubian Queen Roof's edge and the ropes
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