Stein RC2000 FLoating LD

GreenstoneVT said:
RC2000. I prefer that my lowering device stays off the ground and out of the dirt. No accidentally dropping it on a rock near the base of the tree and gouging the bollard. The pretensioning capability is huge as well.
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I'll get a picture of my pretension setup for the POW this weekend. It is an old roofing fall-arrest pinching cam in a hinge-looking body that stays clipped to the sling part of the big metal loop.
Just pop it on, get one wrap, and pull/frap with a 3 to 1 with friction to keep tension for resets.
We regularly have two bodies lay on it, and I used the cam to attach a mini to a 9/16" stable braid for a pull once with no ill effects. Very rope friendly.
 
Not so much the ones that help me from time to time. I trust them, that’s why I bring them along. I still contract climb for some others though and theirs are another story. I just got into a habit because of that and I see no problem with one more fail safe that takes maybe 45 sec to a minute more than a ratchet strap. Your point about gear/machinery is spot on. That’s why I do it. It makes me worry that much less about human error and, like you, I like to remove or lessen any possibility of that error coming into play.
 
GreenstoneVT said:
Not so much the ones that help me from time to time. I trust them, that’s why I bring them along. I still contract climb for some others though and theirs are another story. I just got into a habit because of that and I see no problem with one more fail safe that takes maybe 45 sec to a minute more than a ratchet strap. Your point about gear/machinery is spot on. That’s why I do it. It makes me worry that much less about human error and, like you, I like to remove or lessen any possibility of that error coming into play.
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As a contract climber, that's a fair consideration.
I'm always setting for bear when I show up at a strange crew's job site anyway. Why not carry one more sling to the tree?

Or wrap it with a pair of old chaps.
 
i had stretch marks for 2 yrs. after not wearing saddle from hours of carting gear in air with me. Ultimately, committing to taking slings, carabiners, 2" pulley, long lanyard on every climb was biggest boost in creativity and l-earning. These are professional modular components of pivotal utility. Previous any decision to use slings, krabs, pulleys was await, send up, special handling overhead and limiter. Carrying the gear was a game changer! Not carrying all the extra weight was actually holding me back..
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i was 1st kid on my block with an anchor shaped Porty when they came out, meaning the kinda bent T-bar type i draw etc. for pre-tension beyond bodyweight started out 1x around Porty balanced hang on rope and pull tail for bodyweight + 2xEffort - Frictions. Or sweat, swig, bow lining, line snapping or as vid @5.28 terms rapid slack removal. Also good to make something hanging kinda lighter on line to spirit up/around obstacle real quick somewhat in very 'real' time of on going shituation. Eventually floated pulley on prusik and then went in as shown etc. But the frictions on Porty would degrade multiplier. so threaded an anchor eye bolt (closed eye forged) long thread down pipe and fit threads on end then backed up w/nut as pull pint straight into nose. Carried a baby compression jig of 5x1 mini rig to grab as 3/1 for speed, 5x to finalize. Could also 2hand the 5x for 5x body + 8xEffort by grabbing reverse after the 3x point with other hand and hanging, then pulling. Grip over turns to paste rope on Porty to hold 'purchase' of rope drawn out of the system, when setting another draw etc.
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The setup in rc-3100 movie has a 3x potential pulls for a compression jig....... especially if friction device position was pulley. But going thru all those wraps with the final 1x portion of force volume for jig, for one thing that many half arcs would lock against the force input, then also in mute testimony when compressing to take purchase @2:25 see slack under the prussik, so can't be delivering the 1x after the 2x pull thru this compression jig. So seems like 2/1 then slack under prusik slips thru to device to hold purchase taken, but don't look at it as a force pull position to go from 2x to 3x input..
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i like prusiks that are 1/2-3/4 of host line diameter and stiffer than host line. As taking 100# pull places figuratively thru prusik, 50# to each leg. But to grab then a single line to load 100# tighter line by a 'softer' line if matching size composition. So to give back advantage to grip, try to downsize the 50# footprint and with stiffer material, to then easier dent the 100# line to grip. Personal model of reference.
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i like the sit of this friction brake and can throw turns on off for friction force easier, and weight of rope self loads better. We eventually got to where would do Round Turn or so on Porty,then let rub on some other trees or around another one, so had quick increase/decrease brake force during load movement to suit by walking either direction around other trunk etc. i'd only look to bottom hitch for support, and would want that double bearing. Top can be much lighter stuff just to hold weight of device, and then not needed during loading except to maintain alignment. Oh and nice storage position for jig as shown near end.
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Some old paper somewhere in back of head quotes out 10xEffort brake force w/3 half circle arcs on low friction nylon riding polished steel friction co-efficient. Jumping to 50x w/5 half circle arcs, 250x w/7arcs of radian contact.
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In my imagery rope only supports on inline column, line is basic unit, half circle next basic unit as does 180 and comes back around to column. So i count in half circle arcs. In geometry a radian x 3.14159 (a radian pi), is a half circle. A radian is a 57.9(180 ÷pi) degree pie slice of circle, a magic point where that slice's circumference is equal to the radius, as a more accurate measure of things like this. Not exactly sure all the ways how, but it all fits...
 
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