Yesterday I had an experience which exposed a flaw in my favourite system to jug a rope. Thought I’d share it. This may be old news to some more experienced folks… if so, my apologies.
Up until now I’ve been a big advocate of the 1 jug – 1 GriGri system. I sniped a picture from the internet since it does a much better job illustrating the set up than I ever could. I think this rig has a couple of big advantages over the traditional 2 jug system:
1) It converts from going up to going down very quickly.
2) Rope gets pulled downward to capture progress, very ergonomic.
3) It doesn’t require a weighed rope. This lets it work quickly off the ground and continues to work smoothly after tying periodic backup knots.
4) The pulley re-direct coming from the GriGri provides for some mechanical advantage, making it easy to capture progress at times when standing in the aid ladders is awkward.
Yesterday, while cleaning a roof/overhang which I had just aided I exposed a huge problem which was new to me. As soon as the wall angle goes steeper than vertical, this system is pretty useless. I found two issues:
1) Moving the top jug past a piece – having to disassemble and reassemble the pulley from the backup biner on the top jug just to pass a piece adds considerable time / fumbling. This might not be a big deal on a single piece or two but on an overhanging pitch it’s a real speed killer. This gets worse the more overhanging it is (precisely when the torque on the top jug really makes you want to have the biner in the backup hole).
2) Capturing progress with GriGri – once you’ve got the top jug past your piece it becomes impossible to take in slack with the GriGri. On overhanging ground, The GriGri is going to be at least partially weighted which causes it’s cam to engage. As soon as it’s even slightly engaged, you can pull the pulley rope down as hard as you can and you won’t be feeding anything through that GriGri. You crank yourself up on the pulley but as soon as you let go you go crashing back to your low point. No progress capture at all. To get it to work you have to completely weight your top jug, feed a pile of slack into the GriGri, unclip & clean the piece, and then reel slack back in. Not efficient at all.
Luckily, I had somebody around to throw me up another jug when I ran into this. Overall, I still love this system for cleaning, bolting, and jugging <= 90 degree faces but for the overhanging stuff it quickly gets shut down.
Conclusion: I need to buy a gold (left hand) jug. Does anybody have one for sale?