surveyor
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Everything posted by surveyor
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Here is a video of the hitchless pulley rack in action. [ame=http://www.youtube.com/watch?v=o0fiQvaQ6Pk]Hitchless pulley/rack - YouTube[/ame]
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Thanks to Nick and Mr. Hoffman. I am not sure how far the throw line will extend and still retract on reel.
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[ame=http://www.youtube.com/watch?v=kuCF7ENOG1Y]Rope Shackle for Arborist Throw Line - YouTube[/ame]
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This all steel pulley/rack/hitch works well. the top rigid OAR arm added to the pulley rack makes a slight bend in the rope, which acts like a spring to engage the entire device. When weighted, the top arm swivels up and binds on the rope, sharing the friction with the rack below. It has little sit back, and tends slack nicely.
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not my video.
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Don't know, but I bet it will look a lot like this demo. [ame=http://www.youtube.com/watch?v=U6Oh_LXY4qk&feature=g-all-c]Long ascent- rig for the rope wrench - YouTube[/ame]
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Tony you may want to try this shorter configuration, Just remove the bottom link, and two connecting side plates, and move the 5/8" roller to where the 7/16" roller now resides, This will leave you with 2 5/8" rollers on the same side as the hitch climber pulley. It does not take as much friction this way below the hitch, as there is less roller chain length, but when releasing the hitch on a doubled rope it allows the hitch to bear a little more weigh rather than practically nothing at all. On a single line you have to work a little more to release the hitch but that is not nessecarily a bad thing. Gordon
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How hot does the spiderjack get on a longish decent? Does it ever get too hot to touch? just curious.
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I met Paul Cox this past weekend at the Charlotte competition and he had several of his prototype hitch hiker devices on display. What a great device! It is midline attachable below the hitch knot, and tends slack well, and quite compact (approx. 5 inches). He has used it on both a single and doubled line. There is a good discussion so far on the Tree House site with pictures and video.
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The sideplates are the original RW, the rest is modified. As shown it has to be threaded, however it can be easily made mid line by replacing the front link with a 5/16" bolt through the bottom sheave and the 5/16" quick release pin through the top sheave.
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I modified my RW today so that it has two attach points at the tether end. One for the tether and the other for over the shoulder or chest clip. The bronze rollers are both free to turn, but it still works fine to add friction above the hitch.
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[ame=http://www.youtube.com/watch?v=jbaXAqnyPe0&NR=1&feature=fvwp]Tie A Bowline On A Bight - YouTube[/ame]
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Another option, if you have a surveyor friend with a metal locator, is to borrow the locator and scan the area to find it again.
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I use a 5/16" linch pin with a spring ring retainer as a standin, Less than a dollar at the local hardware.
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The only thing to do is make a device and see if it works. These two work well on rope for me and are quite compact
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Here is Tony's review of the pulley/rack. [ame=http://www.youtube.com/watch?v=CnSLvGuImNE]Pulley-Rack Review - YouTube[/ame]
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See my recent post "pulley/rack combo".
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Hello Dan, I have two left, as payment has not been forthcoming on these last two, I will sell them to whoever I receive payment from first. I have been selling them at my out of pocket cost of $20.00 per sheave plus shipping worldwide of $20.00. a local arborist is using my singing tree rope wrench, with two of these sheaves, and he likes how it does not flatten the rope. I have them installed so that both sheaves are free to turn and it seems to work just fine, as he has done several jobs with it so far. If you decide to purchase I can transact with paypal
Thanks, Gordon Svedberg
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Yea, the yellow hitch cord is glow in the dark too : ) The ANSI roller chain links are rated at 14,000 + lbs. An online arborist sparked this idea also which works well for pulling the pulley rack up the climbing line on ascent, and for using it on a doubled line as well. He is giving it a try today.
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I have been experimenting with this device. It is essentially a modified roller chain, that acts as a collapsing compact rack, that is engaged by the integral eye to eye hitch when weighted. It has rollers where the climbing line enters and exits the rack and so acts like a hitch tender pulley when tending slack. I have a demo vid on youtube entitled "bulldog pulley/rack"
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Yes exactly.
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Here is my mid-line designed Dogbone RW (attribution: the rope wrench concept was invented by Kevin Bingham). I had the aluminum frame water cut, and I machined an aluminum sheave at the lower friction point ( a steel or bronze sheave could be used also). It fits snugly on the line and engages quickly due to its short overall length, and weighs in at approx. 5 oz.
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Easy lift guy, your experience sounds very much the same as what happens to the native people of Papua New Guinea as related by the missionary author Jaki Parlier, in her book "Poking Holes in the Darkness". She had never had an encounter with an evil spirit and did not believe them when they told her what they feared, until it happened to her. Her reaction was very similar to yours also.
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This arrangement works suprisingly well for me also. both sheaves are free to rotate.
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No, as i have spoken to Kevin and have not been selling them (the Dogbone RW's)to the general public. The sheaves are for any who already have his product.
