The Redirect Challenge is off to a great start, with several exciting new ideas and some clever variations on old concepts. Pictured is the basic principle behind an idea developed by leading Victorian climber Tom Oldmeadow, which he calls an “in-line retrievable redirect.”
As shown, the redirect is removed by attaching a retrieval ball to the prussik side of the climbing line, using a klemheist or similar. By pulling slack into the climbing system on the spliced side, the ball will pass through the karabiner and catch on the clip, sliding the Ropeman off the strop and disconnecting the redirect… without having to disconnect from the climbing system!
Tom tells us that he has a later version which includes a stopper knot in the strop of the redirect. Sliding the ball up the climbing line will ‘pull apart’ the stopper knot, and allow the Ropeman to be moved down the line.
Note that the system pictured is only the basic principle behind the redirect, and would probably not work very well set up as shown. Pulling on the spliced side of the climbing line whilst trying to disconnect the system could cause the redirect to ‘flip’ over the branch, possibly becoming very stuck!
The setup shown below goes some way toward mitigating these problems, but in doing so encounters new difficulties. As shown, the yellow strop which passes around the tree is made using a reasonably hardy hollow-braid. The Ropeman (could use Kong Duck, Trango Cinch, ART Positioner or old-fashioned prussik) is actuated by a clip which is connected to the climbing line. To prevent the Ropeman from ‘creeping’ off the end of the strop, a smooth alloy pin is pushed through the hollow-braid below the Ropeman.
As you can see from the picture, the whipping on the spliced side of the climbing line (about 1 foot up from the splice) will catch in the clip, pull the pin out of the hollow braid and slide the Ropeman off the strop. The great thing about this variation is that disconnecting the redirect can take place as one is relocating the climbing system out of a natural redirect (please see Introduction to Redirects for details of this technique.)
The major downside is that use of the redirect depends on finding exactly the right size of clip for the particular climbing line that you are using, which may not be easy or even possible…
Thank you to everyone who has sent in redirect ideas, pictures of SRT systems or constructive criticism of any of the VTIO documents. We appreciate your input, and will do our best to include as many of your ideas as possible as soon as it is possible to update the documents.
We are particularly grateful for the comments received regarding the VTIO climbing guidelines. We hope that these will be out of the draft stage before the VTCC in October, and we value all of the input and criticism that we have received from the Victorian tree-climbing community. Keep it coming!