surveyor
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Everything posted by surveyor
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<p>Hello Paul, I am currently selling them for $225.00 + 40.00 for s/h to the UK. I am back ordered at this time. If you would like to be on a backorder list then please email me at gordonandkathy.com and I will be able to keep a saved mail file just for that purpose.</p>
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I do, but I am currently back ordered (the corrosion resistant links are the bottleneck) I am awaiting word from my vendor and have tried to contact the manufacture and am awaiting their response also.
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That video of the HH mod was a proof of concept only, and would not advance well. There is a vigorous discussion about my working design of the Compact Bulldog Bone at Treebuzz.com, under the catagory "stationary rope technique"
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Old Mill, then this video is for you. https://www.youtube.com/watch?v=Fjo9zYYotKs
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Here is a video review of the Bulldog Bone made by a climber and user of the Bone, his has since been modified to have the handles/stops to prevent cross loading. Thanks to Tyler for making the video https://www.youtube.com/watch?v=Mmx1nGfhs7o
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Several have suggest this for a fix
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Well here is a picture of the problem
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A user has had a "disconcerting incident" with the Bone. The top arm became cross- loaded with the bottom arm impeding the proper upward motion of both arms. Fortunately he was bucked in when this occurred and is OK, and now has a ground level video to demonstrate the problem. If I can figure out how to load it here I will. Gordon
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Here is the Bulldog Bone with the optional coated links and the three bollards. Each coated link comes with stainless steel cotters. There are 4 different levels of grip (and ease of release) possible. The largest bollard offers the most grip, all the way down to no bollard all, which will have the least grip (and the easiest to initiate release).
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Thanks, I have received some nice feedback. For anyone who may want a swivel at the harness attach point, I could add a Nano Swivel from Rock Exotica, rather than the eye shown.
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Paul, and any Bulldog Bone user. You should always use the hole in the middle of the spine to advance the the Bone SRT NOT THE CHAINLINK AT THE TOP. While the bone will advance if you pull it along from the top, if you lean back hard, if attached at the top link, the Bone will release.
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Could the rivet hole not be designed to be midline of the link rather than close to the edge? Just curious, as I have never seen a zigzag up close and personal.
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Testing with a weight hanging on the release handle of the Bulldog Bone.https://www.youtube.com/watch?v=n8xVmpZuDSU
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Thanks Mac for your review here, maybe you could post up your video of taking the Bone off and on the line. Gordon
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speaking of versions, I have added a swivel lock link on the upper arm of the Bulldog Bone.
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Ha! Not to worry, my kids prefer a doubled line.
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Yes you can put a pulley on the bottom arm.
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Well, the two arm OAR that Bing! has, self advances. The Bulldog Bone tends slack better without an added pulley and is more of a SRT device, although it works fine DdRT as long as the standing part of the line is clipped into the bridge, but you have to advance and then manually take up slack. At 12 oz. the Bulldog Bone is about 10 oz. lighter than the three arm OAR. The Bulldog Bone also does not use rollers, however a small 1/2 inch roller can be added to the top arm to make it a bit grippier.
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I continue to build ascender/descenders. This one I call a Bulldog Bone and it seems sweet, with many nice attributes. Here it is in action with my 165 lbs. on Imori.
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Thanks Bing! for the pictures and review. The OAR can be dissembled and cleaned with a wire wheel if so desired. This video shows my latest OAR with a spring on the lower arm to make it "stick" on rope when transitioning from ascent to descent (applicable mostly SRT), because the top two arms use 5/8" rollers, it will likely release on a DdRT setup with all three arms engaged with the Imori, by pulling the bottom arm all the way down (disengaged). One of the very nice features of the OAR is the very negligible sit back when ascending. Bing!, do you work in sappy conifers much? Is the OAR sticky on release if it gets pitchy? Thanks to my son Dean for helping with the video.
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Thanks Old Mill. BenR, it self tends well with some rope weight below. The spring is actually just strong enough to make it "stick" when transitioning from ascent to weighted. I have machined rope size grooves on the inner edges of each arm which helps ease the rope through the OAR, of course it depends on the rope size and stiffness. The rollers are 1/2" wide, so it is made to accommodate that size rope, but works for me on Rocket line, KMIII, Imori, Tachyon, and Yale XTC. It creeps with Velocity on a doubled rope with my weight. Because the top two arms swing down to the bottom release arm, it manually tends slack quite well, and advances nicely when pulled along on ascent. Perhaps Bing! can comment on how his two arm OAR is working out on a doubled rope. Here is a video of the two arm OAR tending slack with a bit of weight below.
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I have made a functional improvement to the Bulldog OAR by adding a spring to the lower arm. Thanks to my son for helping with the video, and for all who have commented on the Bulldog OAR.
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The Bulldog OAR is still a work in progress. As I receive feedback I try to make improvements. It is likely that it would be improved by spring-loading the bottom arm, so that it "sticks" as it transitions from ascending to descending, especially on a narrower rope. Being biased about the OAR I am awaiting further feedback from some seasoned arborists.
