surveyor
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Everything posted by surveyor
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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.
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No race, just experiments. I do like the idea of no loose pieces, and that is what I am trying to perfect.
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I find that a shorter wrench works fine and engages faster. Here is my rough prototype in the works.
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They work fine for descent, notice the roller is below on these "Dogbones", The hitch tends to slide around the round end and push the swivel pin aside on ascent, so I have another model in the works.
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I like to experiment. and it seemed a waste to not use it : ) Actually I already had holes drilled there from when I was experimenting with a midline RW. The sheave is even friendlier to the rope, and helps it maintain its roundness
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Yes, I took the barrel pin replaced by the sheave bushing and made a second tether point out of it.
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I had a machinist make me a dozen bushings for the Singing Tree Rope Wrench, that will work with the 5/16" quick release pin. As of this date I have 8 left. My cost was $20 each sheave bushing, which is what I am willing to sell them for plus shipping, upon payment. First come first served, just send a message if you are wanting one reserved. Here is a picture of my RW with sheave bushing installed.
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It is similar to the Unicender, but it has all steel friction and holds the rope very securely once installed. It also releases differently. On a single line, when you pull the bottom arm down, with or without the hitch, the top two arms act as a friction assist on descent. It combines the features of a Uni with a RW and clamps on line immediatly when weighted.
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Hello all, first post. I have been building a climbing device I call the Bulldog OAR (Offset Ascending Rack) It can be used on a single line or a doubled line. I have a demonstration video. [ame=http://www.youtube.com/watch?v=jS6_SPSRwsw&list=UUe35ZonSxLo-3toKsoTPqMQ&index=1&feature=plcp]Bulldog OAR ascender/descender - YouTube[/ame] An arborist has suggested that it can be configured with a hitch below also, which makes it tend slack nicely when the rope is pulled up through the hitch climber pull as shown in this picture.
