Rappelling on accessory cord

what would you think of doing a double rope rappel on a 70m rope and 70m of 8mm accessory cord to cut the weight on long multipiches

Moshe Rios wrote: what would you think of doing a double rope rappel on a 70m rope and 70m of 8mm accessory cord to cut the weight on long multipiches

You would probably be better off doing a single rope rap using the reepschnur method or 'biner block and using the accessory cord as a pull cord. In which case 8mm is overkill and you could save some weight and bulk with 7mm or even 6mm and some gloves.

This is done in canyoneering when ropes get stuck and you need to get out. Just remember that extra bends in the rope creates more friction so double caribibers through the belay device and a leg loop redirect should be plenty friction to get you down safely.

Peter Jackson wrote: I use 7 or 8mm cord for an emergency chairlift evacuation rap rope. o_O Are you serious? You actually carry a cord just in case you need to rap off a chairlift?

I carry 50 feet of 6mm cord, beal escaper, webbing harness, and a HMS locker in the resort. But I also spend most of my time hitting stuff out of bounds, and have backcountry gear with me as well.

 I've read about people being stuck on lifts for hours, not my jam. 

I've also used the Mammut 6mm rap cord on it's own more than a few times, with 2 biners on a standard ATC, it's not that sketchy, but I decided to use a munter with it after the first time. 

My wife practiced chair evacs as a patroler. 6 mm perlon, 1 inch tube for harness, locking biner for double munter. When you have a dog on the lift with you, you lower it first.

When I rap on 6mm cord, I use two carabiners in my ATC along with a friction hitch backup. Another option is to rappel with a munter hitch, which provides more friction.