I have avoided using auto blocks in the past because quite frankly I hate leg loops and I have had them stick on me + one more thing to have to worry about. That said, I just came across a VT Prusik Rich Carlson s little gem and am trying to figure out a way to best use it. I mostly use an ATC Guide - I know there are newer fancier devices out there but I like it so assume I am not changing. I have experimented with the following rigging method - it works in the back yard on a 10 foot rappel from a tree - however Rich can you look at this and see if it is a valid configuration ? I like the premise of an auto block - stuff has never happened to me but it could - better safe than sorry - but I also need simplicity. If I can use this arrangement and it would work reliably I would probably start using them more... I can rig it in 30 seconds and its very clean / easy to guide (unlike leg loops which are a PITA). Apologies for the crappy photo and assume the VT is tied right, its not in the photo - but you can see the VT is rigged on the haul loop in the ATC, and the rappel rope is rigged as usual. Where you see my finger is where the belay loops on the harness would be attached. The entire assembly is very compact and its easy to manage. Safe ? Comments .. ? Also - theoretically it could be used to lock off the rappel - recommended / reliable for that or not ? Apparently arborists use this config with chest pulleys, I have not seen it in canyoneering or used with a belay device other than a Totem. Last question - the VT Prusik is approx 9mm in diameter - would it still be effective on wet 8mm ropes like the Canyonfire, Bluewater etc.. my guess is yes but just want to be sure. Typically prusiks are made from thinner rope than the main rope but from what I understand VT works different. Comments appreciated.
Posted on: Sat, 07 Jun 2014 19:18:22 +0000
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