surveyor
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Everything posted by surveyor
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The Bone will work both SRT and on a doubled rope also. The termination of the doubled rope goes back to the bridge with the doubled rope. There is a picture made by Shem Kendrick on Facebook entitled "Compact Bulldog Bone" which shows his Hydra swivel keeping a bit of separation between both legs at the bridge, which helps. The same can be accomplished with a Rook swivel at the bridge. The Bone can also be made to be self tending on a doubled rope for ascent, with the addition of a prussic to hold the Bone on the standing side of the doubled rope. Gordon
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<p>The Bulldog Bone has had some pull testing done by a rope manufacturer. The Bone is unrated. The Bone is 260.00 + 40.00 s/h to the UK. There is also a VAT at your end that seems to run about 45 pounds according to previous Buyers. I do require a signed disclaimer with each Bone user. Thanks. Gordon</p>
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2.5mm would be better. The 20mm legs will likely be too long, but you could nipper them shorter easily enough. Just check the cotters before each climb.
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I order stainless steel cotters from McMaster-Carr (3/32"x1/2") They have two alloys of stainless steel, which are of essentially equal strength. the 316 alloy are superior in corrosion resistance.
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I have the two middle tachyon ropes pictured (green and orange with yellow). The Orange has been very well used and has swollen and grown stiff with use, but I used it for nearly 4 years for testing various devices and it was my favorite. The Green Tachyon seems noticeably skinnier when new than the orange, but works well with the Bone. Cougar and Safari have received good reviews with the Bone from others who climb with them. If you Facebook check out "Compact Bulldog Bone" there for further comments and pictures. Gordon
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I have no experience with 11mm htp. It may work if it is a tough, dense rope, and the climber is not too heavy.
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Velocity is too skinny and supple for the Bone as it slowly creeps down rope with my weight, however the skinny KM III works well for me. The orange tachyon works very well with the Bone.
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I was watching a climber today who took delivery of a Bone and was using it for his very first time. He was on Poison Ivy, which is perhaps not the best choice with the Bone, however with the 3/4" bollard installed, he was able to work one tree to take down several dead branches and then transfer to a separate pre-installed rope (PI also) on an adjacent tree, without having to re-ascend from the ground. It worked well for him. He changed his base tied anchor to a retrievable canopy anchor, and also advanced his anchor higher in the tree to minimize bounce.
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I have 6 in stock currently and more parts in hand. email me for details about obtaining a Bulldog Bone, thanks Gordon see my email in my profile page
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During the development of the Bone I have been using the feedback of the users to try and make improvements to the device. The rubber nubs was a mod first made by Mike Powers, who said he very much enjoyed the rubber nubs, and so I have been trying them on the stock Bone. Your Bone could be retro-fit to the aluminum nubs if you like.
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Thank you Adam, enjoyed watching that. How are the rubber nubs holding up for you?
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Thanks Joe, but Adam's reduction video is still blocked here.
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Wish I could see your video Adam, but it says "This video contains content from SME, who has blocked it in your country on copyright grounds." Gordon
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I agree it can be a tad twitchy on a wet rope. Gerbutt, have you tried tending the Bone at the hole in the spine rather than the top D-ring? Just remember my caution in the instruction sheet not to weight the top D-ring when setting back into the Bone. cheers, Gordon
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I did not take any video.
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The Bulldog Bone has no spring to cause it to stay engaged, rather the cantilever action of the bottom arm makes it bind on the rope when weighted. Not every rope will work with the Bone, but the Cougar, Tachyon, KmIII, Rocket line, and Yale XTC would be ropes that I have had good results with. I attended a competition event in Charlotte NC (as a spectator) and there was one climber competing with the Bone and his Tachyon line. He did very well in the work climb, and placed second in the free ascent portion with the Bone.
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Thanks everyone. The Bone is easy off and on line with the right rope. It grips when weighted right now, and is only a hands breath long even when weighted, this makes it nice, according to the last user I talked with, when you are choked up close to the spar.
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The Bone with new style bottom arm which supports the bottom friction pin better, if the swivel snap link was left inadvertently open. Also the upper release arm now has hard rubber nubs, which increase the comfort and act to prevent any potential cross-loading of the top and bottom arms.
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I have made a small improvement to the OAR design. As you see the arms now provide support to the friction links. The snap swivel links would be installed also, as in the Bulldog Bone, but this picture shows the way the links are supported. The OAR is suitable for DdRT on Tachyon and is intended to be tended by pulling line through from below.
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Safety alert for Bulldog Bone users. see bottom of thread for picture and comments. Compact Bulldog Bone | Page 132 | The BuzzBoard
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Perhaps there is a shorter foot loop girthed unto the loop that encircles the tree, hidden on the far side.
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I find that Allgear Rocket line runs well with the installed (5/8") bollard. Vortex is not quite as smooth to release but works best in my estimation with the 1/2" bollard pictured. My new favorite is Cougar.
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should have included a link, here it is. bottom of page. Compact Bulldog Bone | Page 111 | The BuzzBoard
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Please see Mike Powers post and picture on page 111 of the Treebuzz site of a potentially hazardous situation with a longer style loop tether attached on the upper arm of the Bone. Gordon
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Thatoldchesntnut, would you mind posting a picture of your DdRT setup with the Bone? Thanks, Gordon
