daltontrees
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Everything posted by daltontrees
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Mmmm, I think it's just the vertical vector part of the wire angle i.e. Sin30x2.5T which is 15kN. Worst case scenario, it can never be heavier than just a straight vertical lift of 2.5T. So it got to be a 2T in theory and a 3.2T Tirfor for absolute peace of mind.
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Seriously, don't try and make graphite yourself by rubbing pencil on sandpaper, you will get quartz (por worse, corrundum/carborundum) particles into the graphite and if you put abrasives like that in your krab hinges etc. you will gub them verty quickly.
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For what it's worth I can't settle on a preference. I have been climbing for 20 years and always fall back (no pun intended) on the prussik. The guy I climb with likes a 2 wrap prussik and I would like to use a Klemheist for general tree work but because we usually swop over mid shift and leave the loops on the ropes I use a 3 wrap prussik, he complains that the 3 is hard to unlock I complain that the 2 doesn't lock properly (and I nearly decked it once as proof). I can't be bothered with minder pulleys or else I would probably be using the VT. I am fairly addicted to my swedish strop for close-up stuff, it's so stiff that it doesn't really matter if it doesn't hug the stem. Climbing buddy uses a prussik on a short strop and can never rein it right in as a result. I ought to experiment with a really short prussik loop. Blake's hitch is an interesting suggestion that would get round the problem of the fixed length of a loop and the bulk of the 'fishermans'.
