The DB O-rig info

Viking

Viking

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Columbus Ohio
Seems slick. Want to try this out. Does anyone have a closer pic of the setup? Is the termination end prusik girthed through the HC pulley? Whats that ring looking thing next to his VT all about? Thanks Mahdoods!

Drew O-Rig
 
Kindof a crummy vid. I can't see what's going on or how it's set up. Seems like they allow you to extend the system and bring it back- but a pic would help see the setup..
 
Ok found some more info to share. This system looks slicker than deer guts on a door knob! In this Pic you get the idea of the sytem and its function. But we are missing the details of the secondary prussik on the termination end.

Doing more digging I find drew IS using a DMM ring with his hitch. Found this pic Very unclear on the rings purpose but will try it out at work tommorow.
 
First pic opened a "page not found" page.

In the second pic it looks like the ring is just a spacer to keep the end of the climbing line from bumping into the climbing hitch- and maybe is changes how the hitch reacts?
 
The first time I saw a ring like that used was to push the termination away from the hitch so it had room to advance and set without coming into contact with the terminating knot. The key word here is knot. If you use the hitch climber set up with a double fisherman's then I'd recommend using a ring to push it away from the hitch. If not the terminating knot will effect your hitch and sometimes not let it catch.

This system is just like an endless loop. There are other discussions about this rig but most use mechanical devices for the other side. I have not played around with it much but from what I have heard its a pain to re-crotch. Nice effect just a little too much for me with setup time.
 
I Love that rig, but it is for large spreading trees and removable/retrievable redirects or a pulley set from the ground on a srt rig ie pine tree deadwooding or top and flop take downs
 
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In the second pic it looks like the ring is just a spacer to keep the end of the climbing line from bumping into the climbing hitch- and maybe is changes how the hitch reacts?

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Looks like it tightens up the legs on the VT and helps keep the hitch from opening up too much when it's unloaded so it grabs more reliably on loading. Hitches like the Knut, Michoacan, XT etc. don't need that because the hitch maintains its form better when unloaded. Just my guess.
-AJ
 
...thinking about it more he might use it for friction and a heat sink. Might give you a little more room for the hands.
 
Also looks like the ring will hold the hitch together on the rope if the eyes are disconnected from the carabiner, the way a Distel or Schwabisch does on it's own.
-AJ

Edit: Duh! not likely, the ring would just fall off over the eyes if the carabiner is taken out.
 
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In the second pic it looks like the ring is just a spacer to keep the end of the climbing line from bumping into the climbing hitch- and maybe is changes how the hitch reacts?

[/ QUOTE ]

Looks like it tightens up the legs on the VT and helps keep the hitch from opening up too much when it's unloaded so it grabs more reliably on loading. Hitches like the Knut, Michoacan, XT etc. don't need that because the hitch maintains its form better when unloaded. Just my guess.
-AJ

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Why not just capture the hitch with the top biner?
 
Drew's O-rig set-up looks exactly like the one JMerrit showed. I think the difference is a small prussic from the hc to the line that keeps the endless loop sucked in close while working and can be pushed away when advancing up the tree or coming in from a long limbwalk (to eliminate slack tending).
 
http://www.treemagineers.com/downloads/hitch_climbers_guide.pdf

p.19, Floating Prusik

The advantage of this rig is it allows you to run your system short when moving out onto a limb with the hitch in easy reaching distance, on the way back in again, you can extend the length and return without any slack in the system.
A long eye is a good idea for this, the the ring on your bridge sits snugly in the bight formed by the eye, rather than on the splice. Also the hitch has to grab reliably, as it'll be out of reach when the system is being used long. But it's a good idea for hitches to grab reliably anyway... after all, as their name implies, friction hitches are supposed to build... friction. Duh.
 
JMerrit (is it Jaime??), that's a cool set up.

I don't currently have a ring on my rope bridge. I thought of just using a carabiner. I like the snap instead of a prussic (and it just so happens that I have that same snap laying around that I didn't throw away because I figured it would be good for something at some point).

I like it. If I find myself using DbRT, I'm going to try your system.
 
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