Getting back from a limb walk.

yoyoman said:
Really, conjecture????
...and what is it about climbing trees or being a tree climber that prevents us from understanding math and science?
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Richard, your video is probably my favorite video on the subject of understanding mechanical advantage from a climbers perspective..and it's not just because it is really the only one out there;), but because you present it so clearly and make it so applicable. I would love to see you speak at a conference, but I am not going to be at the one in Denver. Will you be at the TCI Expo this year? Anyway, er um, got any ideas for Drewtree who asked a question about getting back from a limb walk and we walked all over his thread. I know you have ideas!

Sorry Drewtree for all the sidetracking, but this has been one of the most interesting threads to be a part of, so thanks for that.
 
John_KAYS said:
Richard, your video is probably my favorite video on the subject of understanding mechanical advantage from a climbers perspective..and it's not just because it is really the only one out there;), but because you present it so clearly and make it so applicable. I would love to see you speak at a conference, but I am not going to be at the one in Denver. Will you be at the TCI Expo this year? Anyway, er um, got any ideas for Drewtree who asked a question about getting back from a limb walk and we walked all over his thread. I know you have ideas!

Sorry Drewtree for all the sidetracking, but this has been one of the most interesting threads to be a part of, so thanks for that.
Click to expand...
I look forward to seeing you at TCI then.
Well, without getting too deep in this...
Returning as Drewtree describes is a 3:1, it does not matter that it is only taking a portion of his weight, as the other portion is standing on the limb, the portion of weight can change, rapidly if he falls off the limb, but still 3:1. Now if he falls off the limb and someone else then takes the tail to lift him back onto the limb it will be a 2:1 for the guy saving his ass, and a free ride for Drewtree, although he probably needs one after falling of his perch.
Taking this all a little deeper, if you put a 3:1 on the DdRT system and make a recapture or re-settable it becomes a 6:1 compound climbing system. If you run a pulley at the top limb it is incredibly easy to lift yourself. I use this all the time (basically using my CE Lanyard) to lift climbers up to were I can connect them to a zipline/speedline setup. Now when I lift them on the same system it is actually a 5:1 complex pulley system for me. Moral of the story, it really is easier when you do your own work.
Ok, sorry to ramble but my mind could not help but conjure up some BS.
 
Here is another video from the yoyoman! Like the other one I shared, but this one has a mini yoyoman to help people understand the perspective...although it looks like he isn't really to scale as one foot looks more like 10 feet to the little guy. Anyway, Richard is a great teacher, and I thought this one was relevant too.
 
So today I brought a thimble prussik with a revolver wiregate attached, to work. I attached it mid line where I wanted to start my limb walk from, redirected the tail through the revolver and back onto a snap on my harness to keep the tail with me. Worked a charm! Much better than attaching my carabiner with sling on a limb adjacent to my last redirect. Although I'll still use that system, this new way seems much more versatile. +1
 
More mechanical advantage stuff:
https://www.physicsforums.com/threa...a-pulley-change-when-lifting-yourself.671642/

So that discussion shows a similar confusion with the hauler vs climber dilemma...


It is very interesting to think about all of the factors in mechanical advantage. Yes you have friction in the pulleys and the weight of the rope and all of that interfering with the pure ratios, but I was just thinking about how you are also pulling on the rope with your arm which has mechanical disadvantage. Your joints are set up with their ligaments and tendons creating, although they are faster movements, class 3 levers. This means you are putting more effort into the system but you are getting longer, faster movements out of it. If the hauling system worked in a more efficient way you could say you were getting better mechanical advantage lifting a load. I don't know if I have all my ducks in a row, but I thought this was interesting to ponder. Also, while pulling on a tag line, if you step behind a tree and put your foot up against the back of the trunk and push against it as you are pulling you have increased the mechanical advantage of the 1:1 pull. I know all of this is unrelated really, so sorry for the continued tangent and more importantly I am sorry for dragging this further down the rabbit hole.
 
My favorite way to get back from a limb walk is to jump. Thoughts of being bludgeoned by some part of a tree or house, keep me from doing so all the time. Some times I will flake the tail end of my line through a crotch close to me to create a little drag.
 
Jumping or swing is good but if you want a more controlled return use your lanyard adjuster.

By the time the angle gets so extreme that I have to worry about the swing back to the trunk, my body position is usually lying parallel to the limb.

If you lanyard off to the branch, releasing your lanyard adjuster gives you a very controlled return.
 
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