Compact Bulldog Bone

RopeShield said:
Anyone try this on platinum 10.5mm?
Click to expand...
Wow, it actually works. I was pessimistic so I just footlocked up 25' a few times with running shoes, but it didn't slip at all. I bounced on it several times and it didn't slide. A little jumpy when it first releases, but the descent was controlled, and on a fast descent it glided to a stop in a couple of feet. I knocked it loose a few times and each time it grabbed right away with minimal slippage.

Maybe it's because I weigh 160 and the rope is new, so it still has a waxy feel to it? This was with the 3/4" bollard.
 
Platinum is a nice solid round rope. My 11mm velocity slips on the LJ but grabs well with the 10.5 Platinum. So the 10.5 mm is gold/platinum with the BDB? Thumbup
 
Maybe because it's so supple? Seemed to work much better than on my stiffer 11-12 mm static lines.

Tomorrow I'll have to get the boots on and climb higher to try it some more.
 
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MikePowers321 said:
Paul, did you do this to your bone with good results??
Click to expand...

Well I made a replica with different holes that I can use for different ropes.
I also made different lower arms with... erm I'll need to check how I did them :)

Basically you're changing the moment by changing the the lenth from the pivot - increasing the moment means less grip on the rope required. By changing top and bottom arms you keep things balanced and also also to change the "feel" of the control on the top arm.

I now have the original BDB for my main rope - and my replica setup for the thinner ropes. I also sometimes use it with a lanyard, although it feels like overkill really.
 
Today I made some longer runs on the 10.5 Platinum and this time I got it to slide longer, like it does on HTP - like 10'-15' before it stopped. The rope seemed to flatten a bit more than previously, but it never got stiff or wirery like some other static lines. I'd still use the bone on it.
 
Here is a lanyard adjuster that has promise. You have to thread it, but it is quite compact and only 5-6 0z. even with all the high grade steel parts. It uses two modified size 60 roller links for the friction links. It will actually descend on a doubled line (on my small KM III) by pulling down on the bottom arm, while the upper arm acts as a smooth brake, on descent.

IMG_1521_zpsockesybi.jpg
 
niiice,
surveyor said:
Here is a lanyard adjuster that has promise. You have to thread it, but it is quite compact and only 5-6 0z. even with all the high grade steel parts. It uses two modified size 60 roller links for the friction links. It will actually descend on a doubled line (on my small KM III) by pulling down on the bottom arm, while the upper arm acts as a smooth brake, on descent.

IMG_1521_zpsockesybi.jpg
Click to expand...
looks good Gordon. that reminds me, I have to send you the old one. I will do that.
 
surveyor said:
Here is a lanyard adjuster that has promise. You have to thread it, but it is quite compact and only 5-6 0z. even with all the high grade steel parts. It uses two modified size 60 roller links for the friction links. It will actually descend on a doubled line (on my small KM III) by pulling down on the bottom arm, while the upper arm acts as a smooth brake, on descent.

IMG_1521_zpsockesybi.jpg
Click to expand...

Surveyor, you are brilliant, no doubt about it. I have a favor to ask, which you can feel free to put way on the back burner. If you bother with it at all, that is.

I saw your video in which you appeared to take part of the Bulldog Bone and by some means fasten it to a Hitch Hiker, in what looked like a permanent fashion. (Ok, I just went back and looked at the video, and it appears that you used the top pair of the screws on the side of the Hitch Hiker to secure your device via one of those links that you use for your Bulldog Bone.)

What I would like you to do, in a slow, relaxed, no pressure way, is to figure out a way to make that item work with the original Dog Bone that comes with the Hitch Hiker, and in a way that is relatively easily disconnected from the Dog Bone. This would allow climbers to have a choice of either a cordage hitch or your mechanical adaptation available quickly and easily, whichever they preferred to use on a given day. If you managed to create such an item and offer it up for sale, I believe they would sell like hotcakes.

Thanks for your time and consideration, and for all of the great work you've done so far.

Tim
 
Thanks Tim, I think I will leave that idea for you to develop. Just be prepared to spend some serious time working on it.

By the way I will be absent from the buzz next week.
 
Thanks for your response, surveyor. I appreciate your taking the time. Sometimes it's not easy to say no to people or to bear bad tidings, so I really do appreciate getting an answer on this. It is fair enough, as it was your time and effort I was asking for, and those are resources that one has to try to use wisely.

Thanks again, so very much.

Tim
 
Way back on this thread there was feedback on the installation and use of a swivel on the bottom of the BDB.
How has that worked out?
Are people still using a swivel (or is the BDB better without)?
If using, which swivel fits best?
Thanks
Al.
 
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