Compact Bulldog Bone

I'd go with the adjustable version. The whole upper assembly is just awesome. Totally solid, being machined out of a single billet. I would also request that Gordon installs an Allen Screw for the adjuster. You will be able to dial this unit in for quite a wide variety of rope options with precision.
 
I can provide any type of 10-32 machine screw desired or requested. I have a good supply of SS oval head machine screws stock, with a combination philips/slotted type head.
I just have to shorten the thread length to just reach the interior friction pin, and re-dress the threads. The nut that holds it captive is a special order low profile friction jam nut.
 
Here are a couple pics of the adjustable Bulldog Bone, as I have been asked for a picture.

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surveyor said:
Here are a couple pics of the adjustable Bulldog Bone, as I have been asked for a picture.

IMG_1993_zps3vubznmd.jpg


IMG_1994_zps9ooowxcl.jpg
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I really do love the new top assembly. With the older version, I really focused on pulling evenly on both sides to actuate descent. Since the new adjustable piece is solid billet, it has a bit more of a solid feel that's hard to put into words other than "refined". Great work there, Gordon.
 
Ok - just putting this up here;

Further testing (low/slow) up and down 15' in this configuration.
I'm aware this device was not made for this configuration - though thoughts on possible Diagonal SRT (or DiSRT?) for the future will not be confined to just one device. The reason I post this here, is that I still want peoples opinions specifically on what may be some of the drawbacks in using the Bulldog Bone in this configuration?

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- It goes up and down, and grabs reliably at this angle / (sorry for lack of detail) and shallower.

- The difference between my last speed/zipline tests is that I now have a carabiner (revolver) clipped to the tail of the rope beneath the lower arm; this reduces the 'bend radius' force of the rope on the lower friction pin.

- I neither speed nor zip on the line - it is easily controlled and slow.

- I am aware that going up and down on a diagonal rope puts many variable forces on rope/devices and trees that can be very dangerous, and definitely needs to be taken into account.

- Originally I just tried this idea for fun; though after learning traversing, and how you can base tie your line on many different things (and angles), other than the tree to be ascended - it got me thinking of descending and ascending a diagonal line (and the advantages and disadvantages therein).

- I'm aware I won't be the first bright spark/dumbass to think of the diagonal line.

- I suppose the only real difference between this and traversing is that the tail of your line will be tensioned by hand, and consequently as you are climbing on a line tensioned at the tail - it will affect how your device reacts on the rope (and what you maybe do to manage the possible effects of that, eg - the revolver biner, ect).

- This also might work to a degree in DdRT (DiDdRT?) - though yet to test that theory.

??
 
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Just surprised nobody's laughed me off the site yet for such an idea (though there's plenty time...).

I will eventually start another thread for this topic - though have nothing new to share for now. No time/energy to learn anything new. The boss has 2 bucket trucks back - I'm a grounded, brush dragging monkey - it'll be weeks before I can post anything new on it.

Try it for yourself (low/slow) - you'll learn as much as I have.
 
I have just gained access to my youtube channel again, and found this video of a Japanese climber using the adjustable Bulldog Bone, and Rope Runner to build a tree deck in Japan. Thought you might like to see, hope the climber does not mind me posting here. He has several good videos.
 
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TimBr said:
@surveyor; I know you are a humble gentleman, but it has to make you feel proud to see a device you not only invented, but made with your own hands, being used by someone from a completely different country and culture. How cool is that? Too cool, that's how cool. Congratulations.

Tim
Click to expand...

You're dead right Timbr. What Gordon has achieved is something truly spectacular!
Not only has he provided a device of unquestionable quality and unprecedented performance, this device has inspired people around the world to reassess their usual techniques.
I have been inspired by the BDB to think outside the box, look for better and more techniques to improve efficiency.
Moreover, the BDB has turned what was a slightly mundane task into an exciting job everyday, just because of the multiple techniques, styles & equipment choices I now have to choose from and enjoy. I also climb safer because of this.
10/10 Gordon!


Sent from my iPhone using Tapatalk
 
What's this a bone mod? Check around the 1:18 mark

This is a fun video to watch alone, but several times you see a very good shot of something that looks like the Bone with serious mod.
 
It looked like a handled solid body device, like the Grigri to me. The handle, if that's what it is, sure sticks up away from the device.
 
There is another video which shows better what he has changed. It looks to me like he has removed the D-ring and the aluminum spacer between the top arm pivot, and replaced the spacer with a relatively large carabiner as his tending point for ascending.
 
From the pictures you posted, it looks like the standard "hook" lower arms to me. On some of the first Bones, I did have a 3/4" roller which could be inserted after the rope was installed, using a quick pin as the axle, but it was deemed un-necessary and too fiddely by users, and I would have to agree.
 
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