Compact Bulldog Bone

That's the ticket! Also, remember that you can always connect to it like a ring by putting your 'biner into the same eye that the bridge runs through.

When you open the rings on the saddle, make sure to use the proper torx bit and use thread locker when putting it all back together. You know all that, I'm sure, just sayin'.
 
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).
IMG_0965_zpsd673614c.jpg
 
Looks very nice :)

What size is that largest bollard? I'm still searching some cheap stock to make a proper larger bollard to see if my skinny can be made to work SRT.
 
Used the BD Bone on 2 trees today. Big wide spreading Live Oaks. Got a little slippage with Luna, more slip with Tropical Ivy, and the Vortex was just too fat for comfort. Tried the Tachyon and it works beautifully! Of course, this is just the stock way the Bone comes and it sounds like adjustments are possible to accommodate the different lines.

I used Oceans' suggestion and put the Petzl Swivel on the bridge of my Sequoia and I really dig it. The whole set up, it's just plain sweet.

And hats off to Mumford (yoyoman) for his SAKA. That thing, with a Pantin, and the Bulldog Bone.....fuhgettaboutit!
 
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This tool is really worth looking into. I also STRONGLY recommend using it with a bridge swivel. This allows you to orient the Bone "sideways" in either direction for either hand.

This seems vital to me, as using your thumb to release the upper arms feels best IMO...in certain circumstances. I'm still learning how to dial it in on certain lines and how to operate it, but the process is fun and rewarding as all get-out. I haven't been any slower with the learning curve, as I'm somewhat used to the Rope Runner, but the time saving of mid-line attachment alone is HUGE with the Bone. It's absurdly easy and 0% drop hazard is inspiring.
 
The swivel turns a potentially jerky descent into something smooth as butter. Lets you keep your elbow in at your side, where you can put your whole body into pulling down the upper arm, as opposed to reaching out, and using just your fingers for a drop-and-stop.
 
So.......Today I made a Bulldog Bone using size 100 Chain links. These links are rated as:
  • Tensile Strength24,500 lb
It is basically the same as the compact Bulldog Bone, just 125% larger in every way. Do you think this Bulldog Boss (thanks Mac : ) would have any use as a light rigging device?
It should be able to catch a shock load and be releasable with the release lever wherever it was anchored.
 
Are you still using aluminum along with the steel links? Seems like at some point, the narrow portions of the aluminum bars near the holes would become the weak point/stress riser for shock-loading, either that or the rope. As I'm sure you know, shock-loading is never good. The best rigging systems prevent true shock-loading by including long lengths of rope that will stretch to some degree and/or allowing rope to run thereby slowing descent before stopping. But, it does sound like it might have potential for climbers who want to single-handedly rig smaller pieces while aloft. I'm definitely interested in the idea and would like to see photos.
 
As the head Risk Manager and ultimate responsibility for H&S;
- what standards and/or certifications do the Rope Runner and Compact Bulldog Bone conform to?

Staff are generating interest in the devices, however without ratings/certifications, I am exposed to culpability and liabilities.
 
Chewbcca, Yes the one and only Bulldog Boss I have made does use aluminum arms with steel links (The arms could be made from stainless, but I am using the 1/2" aluminum stock I have on hand). My thought was that it could be used for light rigging as you describe. I have not tested the Boss for purpose at all, and it is just a thought at this point. Having the same design as the Bone, it should share the characteristic of allowing slippage on line during a shock load.

Mangoes, I cannot speak to your question with regard to the Rope Runner, the Bone has no certification at this point, but I have been engaged in converstion about this issue. I will say that it is stouter than the Zigzag . What staff are you a part of? Private message me if you like.
 
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Surveyor 5/8 bollard good for 11.7 or 12 mm rope diameter on compact version?
Is that what your putting for standard ?or all bollards included and interchangeable?
 
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Aaron, yes the standard 5/8" bollard works for many ropes of that size range. All three bollards are included and are interchangeable. You would need to take a cotter pin off to change out the bollard, but I include two extra cotters. Stainless steel cotters can be obtained at some local hardware stores also. It will creep on some ropes sub 12mm. it depends on the rope. The larger bollard helps only incrementally with grip. and for instance, still creeps with my velocity even with the larger bollard.
While the Bulldogs will release remotely, if a sustained pressure is not applied to the release lever it will have a very jerky release as the load descends on the line.
 

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oceans said:
This tool is really worth looking into. I also STRONGLY recommend using it with a bridge swivel. This allows you to orient the Bone "sideways" in either direction for either hand.

This seems vital to me, as using your thumb to release the upper arms feels best IMO...in certain circumstances. I'm still learning how to dial it in on certain lines and how to operate it, but the process is fun and rewarding as all get-out. I haven't been any slower with the learning curve, as I'm somewhat used to the Rope Runner, but the time saving of mid-line attachment alone is HUGE with the Bone. It's absurdly easy and 0% drop hazard is inspiring.
Click to expand...
Is the runner not midline attachable?
 
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