Bulldog OAR

Surveyor, because I am relying on the OAR to support me and take most of the friction I would recommend using a rated double locking carabiner and use the carabiner or pulley as the "redirect."

Here is a pic, from the first pic I posted just unclip and add a pulley

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the hitch is there as a kind of spacer to allow the OAR to be used as a RW type of device. The OAR provides almost all of the friction and the hitch provides a little. Advancing the OAR with the hitchclimber is more natural. I found that this is much smoother for me. It might be different for other people. I also like having a hitch for other tricks, like the one listed above. Unlike the UNI the OAR has steel points for wear which I can't see wearing out.
 
I did a static load test of the Bulldog OAR pictured in this thread and it held well over 400 lbs. (approx 440) before it began to creep slowly down the rope (tachyon). It is very rope friendly because of the smooth round friction points.

If anyone would like to have one, I would be interested in trading some gear. high on my list would be hand or foot ascenders, or adjustable foot loops and revolver or regular biners.
 
I have added a double sided handle to the Bulldog OAR and can ascend with just a pantin and the OAR (thanks Sawdustsmokin for the pantin). I pull myself to a standing postion with arms and leg and then slide the OAR up rope, then repeat. To descend, I unclip the pantin and am good to go.

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slack tending OAR

I am still working on the OAR design, and this one shows promise. This OAR will tend slack by pulling the rope sideways or upwards due to the attach points using the roller links, allowing the anchor to swivel, causing the whole OAR to pivot at the bottom arm when tending slack.

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http://www.youtube.com/watch?v=5TcgfUGZUeo
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Re: slack tending OAR

Nice and small. I really like it.

Why the aluminum bronze now for the "fingers"? Corrosion resistance? Or a way to get a harder material than the anodizing regular aluminum?
 
Re: slack tending OAR

Thanks, The arms are actually made of brass on this 3/4 size OAR, but aluminum bronze would be a good choice also.
 
Re: slack tending OAR

I guess I like to experiment with different material and have used aluminum, brass, stainless, aluminum bronze, mild and high carbon steel so far.
 
Re: slack tending OAR

It is SRT and releases as you see in the video.

You can of course go DdRT, just pull another rack arm to descend, or only thread it on two rack arms (depending on the rope used).
 
Re: slack tending OAR

Gordon, I have been climbing on the slack tending version on Tachyon and it rocks. I plan on making a vid and I will post. Descending is very smooth and controllable. I have a machinist friend making some sheaves to replace the rollers and will let you know how they work.
 
Re: slack tending OAR

Paul! Yes the OAR likes Tachyon. I saw that Tom liked this rope also, and it was the first arborist rope I bought. I was using a sheave (on the top rack) with my Tachyon today. It releases with roller or sheave so nicely and only needs three arms with my weight on this rope.

I find that it also works on your Rocket Line with four rack arms and 3/4 rollers on all four rack arms. This gives you the option of using it on either rope, just use three racks with Tachyon, and four racks with Rocket Line (or pull the bottom two arms down as shown in the video if threaded on all four arms with the Tachyon).

If you notice in the vid, the biner is clipped directly on the steel link attach points. I have bored out the Links to accommodate my steel biner.

I look forward to your video.
 
Re: slack tending OAR

Paul, that is a very nice setup and smooth ascent and descent on the three arm OAR, thanks for posting.

I can't help but notice also that you have a video of yourself using the rope nut I sent also some time ago. At first I was trying to figure out what device was on the line and then I realized what it was! : )
 
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