When you guys climb on doubles or twins, do you have any issues with not having enough friction if you belay the second coming up with a Guide ATC? If you were using the sterling photon 7.8, for example.
+1 I never understood people carrying a second rope or a tag line instead of doubles. Carrying a second full rope is a ton of extra weight... and a double rope system is far more versatile than a tag line system, and often weighs close to the same... in case of emergency, you can lead on a single half rope(if one rope gets stuck).
Yeah, seriously!?? As everyone pointed out its because most people already have a single rope and arent going to run out and spend $200 or more dollars on a double rope system. Where I climb a double rope is not at all necessary so the few times we do routes with long rappels we will take one of our other single ropes, you really cant understand why people climb with two singles?
For long multi pitch routes that require several raps I always climb with double ropes (twins). So much more efficient at each rap station i.e. just thread the rope through the rings when pulling and voila you are ready for the next rap.
Having a skinny trail line is a good idea for short routes with one long rap, like at the Creek. That way if the fat rope gets stuck on the pull you are not forced to climb back up the pitch on the skinny trail line. Scary!!!!!!! Especially on multi pitch, ehhh!!!
Personally I would never want to climb with a coiled rope, not very convenient with a rack and/or a small pack. And trailing behind.........yuk......think Crimson Crysalis on a windy day........ The raps are scary enough.
Normally, when I am climbing the leader carries both ropes, and trails the second rope on his haul loop. The leader stacks the rope at the belay for the second (who will be the next leader). That way the leader does not have to carry the full weight of the second rope, but rather just a portion of it. Also, often times my second rope is just 6mm cordlette, in which the second would carry it in a backpack with the food and water, unless the route is hard enough to require the leader haul the backpack up so the second does not need to carry it.