Why no hitch for SRT?

[Bart_]

yup

 

[snunyabizness]

chinook hitch

Several months ago I stumbled across the twin rope climbing technique (TRT) and wanted to master some of the concepts using the gear I already own without purchasing any specialized equipment, so that I would have effective methods to work certain scenarios (like failed or dead trees), but using...

www.treebuzz.com

 

[Webfoot]

The Cornell hitch when used with tied eyes with the shortest legs possible will not bind up, there may be others that will also.

Is there a post that explains this and why it works?

 

[moss]

Is there a post that explains this and why it works?

We're back into Holy Grail territory here. If there was a hitch that functioned reliably and functionally SRS for people who for whatever reason climb trees on a regular basis no one would be spending money on hybrid hitch/hardware or fully mechanical devices. It's all about reliable/repeatable performance for low drag ascent, easy slack tending, and smooth as butter release under load. That is the performance part. Then there is "How long does it take to get your system set up when your line is set and it's time to get on rope?" It is still not possible to have all that hitch only for frequent flyer SRS tree climbers.

That said I love what Brocky is doing. Press on brave knight!

-AJ

 

[Tom Dunlap]

Is it a 'universal' hitch? Meaning does if function the same with all climbing ropes and hitch cords?

Some SRS hitches will slide/release with some cordage combinations but not others. That puts them towards the 'Fail' end of the spectrum for me

 

[Brocky]

Is there a post that explains this and why it works?

The slack that usually goes towards the eyes, causing it to bind up, gets pushed back into the wraps with short, stiff legs. Only pushing up on the hitch, instead of pulling up on the rope to tend, also reduces the amount of binding. The Distel, Cornell, and VT are simply wraps around the rope without any sharp bends allowing the slack to the stay in the wraps.
With a double eye tender, or possibly the right pulley, the hitch can slide up before the tender hits the wraps as shown below, and keeps the slack in place. The legs might want to splay sideways, but can easily be held together. You only need to lift the rope 45-90 degrees to get the hitch to move.

It is a universal friction hitch, and there are several others. There is the problem of too much heat from a quick descent, a cord only solution might be a very long hitch that has a lot of surface contact to spread it out.

 

[Bart_]

I've come to believe that the crossing "lump" at the bottom of the common upper coils feature takes up enough friction load causing an ease-up on the coils bringing their operation back into the sweet spot, not progressively binding up. Classic tradeoff free running vt (loose!) vs compact distel bit of ascent drag. nb you can tie any hitch tighter or looser - hello sitback or ascent drag

 

[Brocky]

The double crossing, or twist in back, does the majority of the work to keep any slack in the wraps from “migrating” to the lower section