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Materials Needed:
- Rope
- Yourself
- Gloves (optional)
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First Step:
Grab your rope and position it like in the picture below.
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Those two nutters in the first picture just appeared to be hanging out for the photo' session..
In the photo of the 2 guys outside the window it's comedy of errors and an accident waiting to happen. I am guessing the rope is looped around an anchor as there are 2 strands. This is normal as it allows you to retrieve the rope easily. Problem is the lower guy has both strands looped through his fig 8 but the guy above only has it through one. I know why he did that. The weight of the lower guy pulls the rope into the locked off position so the upper dude cant move on the rope. The lower guy is effectively applying a "fireman's break" to the upper guy so he can't rappel. His solution was to only clip into one rope halving the friction. So what?
When the first guy gets to the bottom I hope the upper guy isn't too high. the lower guy stands up and lets go of his ropes. As the upper guy is only attached to one strand, the rope will pull around and off the anchor (through the first guys fig8, resulting in a fall.
If 2 people need to rap on one rope at the same time it's always going to have an element of danger, however there are times when it's less dangerous than making slow rapels one at a time. Say you're on a multi-pitch climb and an electrical storm is rolling in.
This is the procedure. Loop the rope in the normal way around your anchor, tree or rock etc. Each rappeller takes one strand and both of you clip into one strand and rapell at the same time. This creates a counterbalanced system. Yes you need to be similar weights, the friction at the anchor means there can be actually quite a large difference. It's the kind of this you and a climbing buddy should practice before you need to do it in a real life situation.
As for the instructable, it really hurts your thigh and can mess up gore-tex type outdoor wear but is a potential life saving skill so everyone should know it and practice it!
But it does describe a great technique and is a solid instructable.
But we used Swiss Seat Harnesses that I think would be more comfortable and they can be made out of just rope, so I don't think they go against your "no gear" thing. (Although you do need a caribiner)
Here's a link on how to tie one:
Swiss Seat Guide
http://www.metacafe.com/watch/404269/how_to_abseil_down_a_wall_with_just_one_rope/
Feel free to embed it in your instructable if you want to...
this technique would work...but i'd hate to have a rope running past my "business" for too long with it supporting my weight...there are quite a few methods that can be used for stuff like this...(can't find linkage at the moment)...and i ALWAYS carry at least 4 carabiners with me any time i go out in the wilderness where i might even remotely need to do any of this stuff...(hell...i've been known to cary a 50M rope and my Trango Jaws with me through town)
- Pants
- Shirt
Without either, you'd have a couple very nasty rope burns! <grin>You also omit to describe how to lower yourself "You can slow your descend by holding onto the rope tighter with your right hand" isn't good enough, and conjures images of nasty rope-burns.
L