Compact Bulldog Bone

surveyor said:
Moving the friction link too far from the upper pivot has diminishing effect with the gripiness, and worse begins to interfere with the passage of the rope upon ascent, with too much pressure required to initiate release also.
I would recommend either a diet or a fatter rope : )
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Yea that was why I asked, but I hoped it might be otherwise. I wonder if a shorter link would be better than larger bollards?
 
New tending set up. At first I thought the Bone would release with some downward pressure at this point, but I'm finding it won't, especially with the neck bungee. With the bungee on and my body fully extended laying into it, the bone doesn't budge. Any thoughts?
 

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Neat. I bet it tends well there also! The bungee is the key I think. As long as the weight is borne by the teardrop attach point, rather than the upper spine of the Bone, then the cantiliever clamping friction link stays engaged and the spine is not pulled out sideways from the climbing rope, and your test of leaning back forcibly proves that it works.
 
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surveyor said:
Neat. I bet it tends well there also! The bungee is the key I think. As long as the weight is borne by the teardrop attach point, rather than the upper spine of the Bone, then the cantiliever clamping friction link stays engaged , and your test of leaning back forcibly proves that it works.
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Having the ring here does aid in smooth tending and it is nice and tight, no flopping around. The Williams biner to your attachment hole did work nice, but I couldn't have that big thing hanging on my neck any longer.
 
The carabiner was hitting the upper arm and pushing it forward, kind of shown in this picture.
 

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have experienced what your talking about. now i see. i use a stiff neck thing to advance my system, so there are occasional uncomfortable moments with that thing pulling up the bone. i have settled with it for now but i know there is room for improvement.
 
MikePowers321 said:
New tending set up. At first I thought the Bone would release with some downward pressure at this point, but I'm finding it won't, especially with the neck bungee. With the bungee on and my body fully extended laying into it, the bone doesn't budge. Any thoughts?
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Did you splice that ring into the throwline Mike or just double fisherman loop it?
 
You might try a loop attached at the very top of the double jointed link to advance the Bone, as it advances like a dream there. It is important to have a bungee there also as you do not want to transfer weight there or pull the spine sideways either, try it low and lean back heavily to make sure it does not cause the Bone to release unexpectedly.
 
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MikePowers321 said:
New tending set up. At first I thought the Bone would release with some downward pressure at this point, but I'm finding it won't, especially with the neck bungee. With the bungee on and my body fully extended laying into it, the bone doesn't budge. Any thoughts?
Click to expand...

I spliced a short 2.2mm Zing It continuous loop to give this a try on the BDB with the 5/8" bollard on Tachyon.

I connected the biner directly to my usual figure 8 chest harness without a bungee. With this combination, I could not lean back in a way to keep the BDB from grabbing as I had previously been able to do when the tether came directly off the back of the hole as designed.

Unfortunately I did not think to attach the tether the normal way and do the lean back thing to determine if the new positioning alone, was responsible or if the different rope/bollard combination previously used had played a factor in being able to force the BDB into a position where it wouldn't grab. More testing to be done....

This setup tends very well and I will continue to use it. Thanks Mike!

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Looks great, nice and clean! I was making up ways to tie that as I went along, haha. The only thing different is how tight I have that ring to the bone. It's tight enough where it stays in the upright position without any help at all. So there is zero slop or play. It is pretty much fused to the bone :).
 
MikePowers321 said:
Looks great, nice and clean! I was making up ways to tie that as I went along, haha. The only thing different is how tight I have that ring to the bone. It's tight enough where it stays in the upright position without any help at all. So there is zero slop or play. It is pretty much fused to the bone :).
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Hmmmm...I wonder how hard it's going to be to make a micro whoopie sling out of throwline. Attach the ring and adjust the sling until the ring's tight to the bone.
 
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