E
eyecave
Guest
well, with that admission here goes.......i am familiar with pull downs......pull downs are where the cave has an upper and lower entrance..........the caver(s) enter and pull down a double rope thru a sling or carabiner rigged up top.......two ropes attached by a double grapevine knot, or a single doubled rope is used and its not usually difficult to pull the rope down after everyone has rappeled the pit.......eventually a lower exit is made and beer is consumed shortly thereafter...... i understand that a pull thru is when you enter the lower entrance and pull the rope up from the bottom......or do a pull down to a dead end and then back out the top entrance,....i have never done the latter and it sounds quite intriguingly dangerous!........ not being a part of the english caving scene i am goin to suggest something that may sound old-hat or stupid.......but, here goes anyway......what about using a rounded wheeled device of somesort in the upper rig point.......a carabiner or somesort of metal device is what you are trying to pull the haul cord with the rope attached knot thru......thats whats hard right?.........now, if the carabiner had a "wheeled" device associated with it that had a large enough opening for the knot to easily pass thru the movement when the knot was at the top rig attachment point would have to make the pull thru easier to work???....... :shock: :shock: :shock: :shock: :shock: