Speed line pulley

Great discussion and images! Learned some new things today.
On the SRT...and speaking from a real newbie position here...so don't beat me up too bad....I would think you would tie at the top near the trolley and not base tie it. For 2 reasons...you would probably need a really long rope and the force would be double.
 
Force would be the same, as the climber hangs from the trolley.

I thought about using srt, before I did it. Didn't make sense, spider jack tends slack so well, I could walk up those rotten leaders with one hand on limb and only one hand on rope advancing. With srt I use prussic cord and hitch climber pulley, it doesn't advance as easy and at times I would likely have to use 2 hands and would have been a little jerky, which I wanted the least wiggling as possible.
 
Frax, the climbing line could be much shorter if srt, cause only one leg of it attached to trolley, could be half the length needed as double line.
 
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Frax, the climbing line could be much shorter if srt, cause only one leg of it attached to trolley, could be half the length needed as double line.

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We are in agreement here.

I explained myself really poorly. I was meaning that if one was considering base tying, say to one of the highline trees and passing the rope through the trolley on SRT it woul be double force. And depending on how long your traverse on the highline was, you would need a long rope. But doing it that way makes so little sense it can be rule out completely I guess.
 
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For light to medium size stuff do you guys typically use 1/2" stable braid, or something more static? Would Amsteel be a good choice if I can mitigate abrasion?

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Any hollow braid would be a poor choice (picks too easy, if a piece snagged on it). Stick with DB's or static lines (the pulley runs smoother on a 'round rope', too). I have 1/2" X 200' and 5/8's" X 200' static lines that I use.
I also have a slideline 'carriage' that I made out of 1/2" steel plate (similar to Tony's) that weighs 4.5 lbs. I always use a haulback/control line. Not a fan of 'crash landings'.
Loading the anchor is the biggest concern.
Mahk Adams had an excellent article in TCI mag about this a few years ago.
 
Also, what are some of the larger loads you guys have traversed, how far from the removal tree/limb. I know size doesn't matter (leave it alone) as much as managing forces but I'm curious.
 
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Hey X, yea what do you typically use for the speedline itself?

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Usually use our 5/8" double braid. 220 or 250 ft I think. Sometimes use 3/4" double braid, but not very often. I personally wouldn't use 1/2" unless very small limbs; sometimes do that on a spruce or pine.

5/8 " double braid

Most of my speedline runs range from 100 to 175 feet.

Longest one ever for me was around 280-300 feet I think? Used steel cable for that one. Gerry Beranek shot video of it, around 2008 I think, he put out a short youtube of it:
speedline wizards video

I bet amsteel II would make an awesome speedline. Wespur sells a very nice size amsteel II. Bought some for chipper winch.

7/16" inch. Since it has a double braid cover, it doesn't snag anything.

amsteel II 7/16"
 
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Also, what are some of the larger loads you guys have traversed, how far from the removal tree/limb. I know size doesn't matter (leave it alone) as much as managing forces but I'm curious.

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We've taken 700-800 lb. logs on 1/2" Stable braid over about a 225' span. This was the max we wanted to take with that system. It was the 'ideal' set up with the anchor tree directly behind the removal.
Usually loads alot less, though. (100-400 lbs.)
Set up can make ya or break ya.
 
Sorry for the delay in responding..head cold.

Very good responses and questions. Another question Thinking about the new large block from DMI also what are your thoughts on using a floating/adjustable point for the rigging end, thus eliminating the climber from always having to undo the rigging system from the limb by moving it up or down. I realize with more rope in the system you will have more stretch but I am curious if this has been used before or is it worth the extra rope?
 
Dont take me as saying that SRT would be the way to go but if you are to do that it does not mean that you are doubleing the force to the trolly. In reality forces could be less depending on the angle to the anchor.
 
Of course not, I was taking it as though they had there main line going from the ground through something at the trolley and then to an anchor (such as someplace in the tree or back to the ground for some reason).
 
But then when the trolley moved the load, aka you, would move up or down. As the trolley moved away from center (in relation to the ground anchor) the load would be forced to move up, caused by the shortening of the rope.

If you suspended from the trolley in that fashion, in reality what would happen is the trolley would move to center ad you would lower to your lowest point and you wouldnt be able to move horizontally again. Thats all assuming of course that the horiz-lifeline was completely taught and level.

IMO anchoring to the ground and then running up to a trolley like that wouldnt make much sense from a work perspective. It might have rec applications but none that I can see.
 
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