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Climbing Disciplines:
Slacklining:
Re: [live2climb] Hey Slackline Joe.:
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slacklinejoe
Aug 28, 2007, 4:46 AM
Views: 6806
Registered: Nov 5, 2003
Posts: 1423
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live2climb wrote: just use pullys and a static line hook up a 3 to 1 and tie it off let slack out the pullys and your done.
Well, lets just take a look at this. He said he wanted a solo rig. Please keep in mind he said he already has the gear to set a line that long, just wants see if he can make it more efficent speed wise as a 125 foot line is a lot of line resetting when the ratchet only holds a few feet of webbing for each reset.
You would be looking to pre-load the line upwards of 600 lbs of tension (most likely closer to 800lbs). A 3:1 rigging on high efficency, very large sheave, well cleaned rescue grade pulleys is 2.44:1 once you include friction. Cited from a Rescue Rigging Study.
That leaves you pulling between 245 and 327 lbs solo.
Cost of those high end pulleys alone exceeds $200.
Lets just say that if you've done full 125 foot lines solo that way then you would be an exception to the rule. Far more people have a hard time beyond 75 feet with those nice pulleys in 3:1 configuration. By no means am I saying it's impossible, just not likely the average bloke will be setting that solo.
For those wondering a 3:1 with biners would need 350 to 470 lbs of pulling for that scenario. Better call up some friends.
(This post was edited by slacklinejoe on Aug 28, 2007, 4:49 AM)
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