Poplar Rigging

Pretty cool that the climber was using a munter to ease the drift. I would've chosen a figure 8 but he was smart enough to do it with less gear. Pretty skilled work right there.
 
TreeLogic said:
Pretty cool that the climber was using a munter to ease the drift. I would've chosen a figure 8 but he was smart enough to do it with less gear. Pretty skilled work right there.
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The figure 8 wouldn't get too hot? I'm thinking the munter on an older piece of rope might be the better.
 
It should? With the munter most of the friction, and therefore the heat, is in the rope. But I admit I've never seen any side-by-side temperature tests.
 
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Nish said:
It should? With the munter most of the friction, and therefore the heat, is in the rope. But I admit I've never seen any side-by-side temperature tests.
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As with the PortaWrap, heat from rope-on-metal is much more easily managed than the rope-on-rope. The metal acts as a heat sink. Even in old school rigging, when grooves were cut in the trunk for the rope to wrap around, rope on rope contact was always avoided. A heavy piece rigged with rope-on-rope will glaze the line in a split second.
 
I'm thinking that it matters more whether the primary place of friction is isolated in a place where heat will build up (the figure 8, the groove on a truck or crotch, and certain types of rope-on-rope contact), or whether it is distributed over a large area (as in the munter, where the friction is spread out over the entire length of the rope running through the hitch).

Here's how I look at it. When friction puts the heat in a single place, it's surely best that the place be highly heat conductive and sink-like, so that the heat will quickly spread out. Better still, however, if the heat is spread out to begin with.
 
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Nish said:
The figure 8 wouldn't get too hot? I'm thinking the munter on an older piece of rope might be the better.
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TreeLogic said:
Nope. Should work pretty similar
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I should say, for the way the climber was using it they should work pretty similar. You'd never want to use either one to rig heavy pieces alone. But I can assure you, a heavy piece being rigged with rope crossing rope will sever a line almost instantly and should be avoided at all costs. My lanyard can prove that point. My groundie lowered a decent size limb once and my lanyard was over the rigging line...nearly cut right through my lanyard. Luckily I was tied in with my climbing line too.
 
Nish said:
Here's how I look at it. When friction puts the heat in a single place, it's surely best that the place be highly heat conductive and sink-like, so that the heat will quickly spread out. Better still, however, if the heat is spread out to begin with.
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Good point. I do know that the figure 8 has been a standard in controlling speedline drift for many years. You'll find it in many a rigging manual. But for the light loads it would see, I think the munter would be just as good in that application. I just got to get comfortable tying one now :)
 
Very cool. Lots of good technique. He did almost eat his own teeth at 7:52 though. Bit too much tension on that speedline.
 
Watched the whole vid again. That is some pretty sweet work going on in some tight quarters.

There must be 20 different ponds on the ground, and glass greenhouses everywhere. There's lichen all over the place - almost covering one of the roofs. There were some nice views from the treetops in that vid. Looks like they got to blow chip on the ground at one point for mulch or compost. Anybody know anything about the site?

I did notice the climber almost got his thumb taken off once from the munter hitch...1:20. And almost cut his rigging line once ...3:58. But he didn't on either occasion. Hard to find much fault :)
 
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