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ceramiclover
Feb 17, 2005, 4:52 AM
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anyone ever use a pulley on a climbing rope for a zip line? would the friction be bad?
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anykineclimb
Feb 17, 2005, 5:00 AM
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I've done it before. Not the best treatment for your climbing rope. best to use a dedicated static line. Also use a double pulley as one will twist as you're going down the line and can damage the rope.
Have fun!
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niftydog
Feb 17, 2005, 5:07 AM
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Sure!
In reply to: would the friction be bad?
Bad for the rope? Potentially, if you're not careful. Thing is you'll need static line not dynamic, a dual sheave pulley is best, and don't go too fast for the pulleys bearings. Some manufacturers specify a max speed. The Petzl Tandem is rated to 10m/s but also comes in a "high speed" version.
Google "Tyrolean traverse"
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ceramiclover
Feb 17, 2005, 3:40 PM
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the petzl tandem is a dual one? i've never heard of.
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niftydog
Feb 18, 2005, 12:09 AM
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yes, the tandem is dual. It comes in a "fast" version (20m/s) as well as one for cable (stainless steel sheaves from memory...) and there is also the "Trac" with an integral carabiner.
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gumby519
Feb 18, 2005, 8:29 AM
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if you get a big pully it should work just fine, i had 3 set up between two big pine trees, one out to the street tree and another one. And i had one on a dry rope and one on a not dry rope and actally the stadic rope was much faster and went so much better than the dry rope. We also had 3 different pullies.
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livingtheedge
Feb 21, 2005, 2:21 AM
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How fast are you planning on going?? The Petzl Tandem is rated for 10 m/s which is 22mph.
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ceramiclover
Feb 22, 2005, 9:48 PM
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at this point, since i've not zipped since camp 10 yrs ago, a mph estimation would be premature.
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ctardi
Feb 22, 2005, 10:00 PM
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You suspend a line between two posts/trees/clifs and hook yourself onto a pully, and go across, the line usually slanted in the direction of travel. If you've seen cliffhanger, they use a level one for transportation purposes at the beginning.
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slobmonster
Feb 22, 2005, 10:39 PM
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You can probably price out the elements needed cheaper than HERE, but note that stainless steel cable and hardware are recommended.
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anykineclimb
Feb 23, 2005, 5:55 AM
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In reply to: You suspend a line between two posts/trees/clifs and hook yourself onto a pully, and go across, the line usually slanted in the direction of travel. If you've seen cliffhanger, they use a level one for transportation purposes at the beginning.
Thats a Tyrolean traverse. not a zip line.
Oh, NEVER refer to Cliffhanger for ANY sort of climbing advise.
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ctardi
Feb 23, 2005, 5:59 AM
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In reply to: In reply to: You suspend a line between two posts/trees/clifs and hook yourself onto a pully, and go across, the line usually slanted in the direction of travel. If you've seen cliffhanger, they use a level one for transportation purposes at the beginning. Thats a Tyrolean traverse. not a zip line. Oh, NEVER refer to Cliffhanger for ANY sort of climbing advise.
Wasn't referring to it for climibng advise, just to suppliment my description.
I would never zip/TT of a single piton driven into sand...
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dig_scott
Feb 23, 2005, 7:02 AM
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I have a tandem pulley (red) and the thing is slow as hell. my petzl single rescue pulley is faster.
defintly get the speed (grey)
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match
Feb 23, 2005, 7:57 AM
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almost off topic but cliffhanger is on superstation right now, really the worst movie ever, haha climbing ice in crampons and a tshirt haha terrible :shock:
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anykineclimb
Feb 23, 2005, 8:05 AM
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Ctardi, sorry. not trying to flame you or anything. More for some n00b out there that might actually think theres something (real) to learn from that movie.
That movie is a great laugh
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truffalatree
Mar 15, 2005, 2:49 AM
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we just built an awesome zip line in our yard. using 5/16th cable, triple equalized webbing anchors and a couple pulleys connected to each other with a homemade steel plate. The pulley's are wearing fast (we certainly spent more money on the cable than the pulleys). I've looked at the petzl tandem and others.... pricy. is it worth it>? how many zips are you going to get out of something of that sort? considering what a b*tch it is to get up on the line and change out any of the hardware I would like to use something that lasts longer than a few weeks... any ideas?
we also have a fantastic break system which I thought i'd share - it's quite revolutionary -we poked holes in six light duty tires. we ran the tires through the cable. vice versa. then we attached one of the tires to the cable about 12 feet from the final tree with a prussik. we then attached a rope to the second to last tire and have folks drag the tires back out towards the starting tree after each run. it's not the simplest design but it creates for an exciting but yet smooth finish!
juust thought i'd share. hopefully yall have advice for us!
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