adjustable friction saver

Re: adjustable false crotch

Tim,
Your problems posting may be related to teh browser you use. My preferred browser (Opera) doesn't use Java and some other newer programming, so I would not be able to post a picture here from it, but I can post if I use Netscape. I'm sure Internet explorer would work, too. If you are using some other browser, try downloading one of the big names and see if that helps.

k
 
Re: adjustable false crotch

What I want to know is where I can buy one so I can judge for myself,anybody know?
also I have often set a pulley on my static line and worked from this,the question is how much difference is there from the RG,I mean I can set it from the ground retrieve it without any other hardware other than a throw string,I can set it on a stem with no crotch.To me this sounds like the same applause the RG is getting.Or maybe I'm missing something other than the fact that the RG can be moved around from in the tree such as if you re-crotched in another part of the tree ,given that is a big plus.
 
Re: adjustable false crotch

I been asking around with no results. Used it once at a demo day in PA. Mark C was there with the RG with some other goodies. The tree was wet but I liked the ease of taking up my rope. The hitch did act quicker but that can be adjusted. It looks cool too, solid, pretty versatile.
I would love to work with it for awhile. I saw a fellow use the cam part as a lanyard attachment. Nice and compact.
I was wondering if it can be choked up against the trunk. I usually do that with dead trees, makes me feel better.
Later
 
Re: adjustable false crotch

Being able to choke any of the adjustable false crotches is one thing that sets them apart from the straps. There are times when no suitable crotch is available, then the choked setup is a real problem solver.

Tom
 
Re: adjustable false crotch

The person to get in touch with is Greg Good. His phone is: 262-538-1703. Or mail him at: ggood@onebox.com. He imports a number of euro products and links up with Hubert Kowalewski (ART/ Lockjack & Rope Guide) and Friedrich Drayer. Friedrich has a wide range of gear. To get an idea, you could check out his website: www.drayer.de.
That all sounds dreadfully like product-placement, doesn't it?! Wasn't meant that way... just trying to answer a question here!
 
Re: adjustable false crotch

Originally posted by Hillbilly: "I've heard that it will be in the Sherrill 2003 catalog"

You heard right! We're already stocking them, too, although I've been too busy to put them on our website yet. You can order them by phone though, 1-800-525-8873.
-Sean
 
TC165 wrote:

"... as for shock absorbing qualities, ...
How does the RG with a very expensive LockJack incorporated work any better than the same setup using a prussik or other hitch or knot?"



There was a talk at the ISA conference in Seatle that discussed some research relating to this very topic. I will try to dig up the notes and post them later. From what I remember the LJ slipped quite a bit more than a prusik and therefore generated less force back to the 'climber'.

Does anyone else have or remember that data?

Mahk
 
Well, after several pages of responses, I've heard several very good reasons for using an adjustable false crotch. However, I have not heard a single reason to justify incorporating a very expensive LJ type device in the adjustable false crotch instead of a simple prussic.

Either I'm missing something or else no one can answer my original question. When used in an adjustable false crotch, what advantage does the $200 LJ device have over a $5 prussic? When I can afford a LJ, I certainly am not going to waste it by incorporating it into an adjustable false crotch! I'll use it for my climbing hitch and use a prussic on the false crotch.
 
Brian,

I believe they are different. The lockjacks that is.
From what ive been told,
The original LJ intended for a mechanical climbing hitch differs from that of the one used in the rope guide. The one on the ropeguide is smaller, thinner and doesnt have any exposed bolt heads, etc. Tom D says its simliar in size to a hockey puck. I do not know if applications could be interchanged between the different styles.?

Tom has offered to let me try out his RG for a few days next week. I will pay close attention to any advantages or disadvantages and compare them with my system with a hitch.
Because im a gear head im ready to but one, but since i can get a test drive first, why not?
 
The RG adjuster is the same diameter as the LJ. Its thinner in cross section though.

The RG is meant to slip-grab like Mahk wrote. This ability will reduce the shock load to the climber to an acceptable load. Also, this lowers the load on the TIP in the case of a fall too.

Tom
 
after finding a RG thru Sherrill and using it I can tell you that the device is well worth investing into. the set-up I had was just like the one shown in a pic previous in topic using petzl biners and petlzl fixie. the biggest difference is in retrieval. the fact that the ART device, its not a LJ, loosens as the line pulls thru makes a big difference. the whole system falls out of the tree faster that pulling your line out. here is the next problem, the pulley is exposed making able to be damaged when it hits the ground. whereas in the fixie the pulley is covered. the ART device is very sturdy and seems to take impact on earth well but would hate to see it hit concrete so controll lowering this device is a must. just an added thing to carry in the tree. my pulley on the RG is already showing signs of wear after only 1 day of not control lowering . I called to get replacement but do not know if it is a part that can be purchased. the original RG's I saw had brass pulleys or seemed to be brass but mine is plastic and was wondering if that was because damage to the pulley is inevitable and a brass pulley with a burr in it would a bad problem. overall I think the $178 investment is well worth it compared to the aprrx. $80 in biners,pulleys, prussiks, shackles and the sometimes headache when your system doesn't come out of the tree. though there will always be trade offs, it our decision as the climber to decide what trade offs you want..............oh yeah ,Sherrill should let people know in their instructions on how to control lower the RG especially if there is no replacement parts.
 
Here is a picture of the RG series. Sorry about the copyright overlay, but I can't risk somebody "borrowing" our images.
 

Attachments

  • 4047-RopeGuide.webp
    4047-RopeGuide.webp
    31.4 KB · Views: 118
I hate it when that happens.

Sherrill.JPG


crazy.gif
 
To hear that it takes impact on earth well makes me cringe alittle. You did say $178, right. Brian, I hear ya man,the logics in that price range doesnt seem right. Someone had a pic posted that looked really good, cant remember who, I would probably make 1 or 2 of them up for Pines maybe or some other real abusive job or whatever. Certain jobs, maybe break out the bling-bling piece. It does look good, cant take that away from it. Maybe a show and tell thing at a comp.

It's a newer design. I think Beddes showed the one he did first, with the little shackle that had a pin you pulled to release a biner, at ITCC in Eangland. Maybe following year??
The RG now has worked it's way there ya know. You have a good argument Brian, no doubt. I saw a guy at TCI use it for lanyard too. Plus it's a writeoff. AHhhh, have fun with it.
Later
 
As I don't tire of mentioning, these products are developed in close cooperation with climbers by climbers, insofar there is definitively no intention of ripping anybody off- neither in initial purchase cost, nor in availability of replacement parts later on. All individual parts are replacable... talk to Greg Good and/ or Sherrill about it!

As to dropping the R.G. from a hight... in terms of materials used we're talking very high tolerances: the body is made of constructal aluminium (that's what Porsche uses to make their disc brakes of), which is a very high grade aluminium- toughissimo! The shackel is drop forged, meaning you can bend it by 180° without it breaking (not that it'd be a good idea!). The pin that holds the pulley in place is self-securing and lock-tightened. The weak point that might get dammaged is the cam- if this got gouged it might not fit into the body cleanly anymore and not cinch up against the rope.. in this case the worst that can happen, is that the rope'll run through to the stopper knot.

The reason the brass pulleys were replaced was that we found they were getting damaged to easily. This plastic pulley has proved tougher and alltogether more suitable for this application.

Dropping false-crotches from a hight onto hard surfaces is a problem! How many people do you know, that use a throw-line to de-install with? Not many, I bet! Think of false-crotches useing carabiners, instead of rings. Not only are these biners weakened by the wear of the rope and manufactured of a lower grade of aluminium- they're definitively not meant to be dropped in this fashion.The R.G., to a degree, is. I'd be most worried of someone getting injured by the thing falling on them!
One suggestion for de-installing is to take a throw-bag up with you, install the R.G., toss the bag out of the tree, feed it through, choose a fork above the R.G., have the throw-line pass over this & fix it with a small carabiner to the eye of the ring on the R.G.. To de-install, just pull the line out normally holding the other end of the throw-line.
 
Just wanted to jump in on this one, in reference to "de-installing" FC's.

I use my throw line, always. One of my employees didn't like to use his throw line, and I warned him it would eventually come back to bite him. It did. At the end of a long day of climbing he tried to retrieve his FC and climbing line, unsuccessfully. So he had to get his throw line out anyway to get back into the tree to retrieve his stuck FC and climbing line. 30 minutes and a bad temper later, he had learned his lesson.

That is one of the reasons why I use my throw line to retrieve my FC. The other is that I really don't like the idea of my FC or AFC bouncing down out of the trees and landing on anything; grass/sidewalk/driveway/rocks/me/clients windows, etc.

It is safer and more efficient in the long run, IMO.

TMW
 
You must log in or register to reply here.

New threads New posts

Back
Top Bottom