Discussion Topic |
|
This thread has been locked |
rhyang
Ice climber
SJC
|
|
That looks like a 5:1 mechanical advantage system, if I'm not mistaken (ala crevasse rescue).
|
|
the Fet
Knackered climber
A bivy sack in the secret campground
|
|
I wonder if rather than having a 2:1 mechanical advantage system built with rope/pulleys you could use a lever instead.
It would be more efficient since you wouldn't lose energy due to rope stretch and friction. It also might require less resetting, i.e. someone adjusting the ropes every X number of feet on the 2:1 system.
You could possibly adjust the leverage in small increments by sliding the handle along the lever.
One disadvantage may be the potential for repetitive motion injury. A rope allows play so your joints aren't doing the exact same move everytime, while the lever would probably keep everything aligned.
Here's an idea for a simple 2nd class lever. In reality you'd need the distance between the hinge (the fulcrum) and the rope clamp (the load) to be smaller, so you'd have more mechanical advantage than illustrated.
|
|
bradthatclimbs
Big Wall climber
vancouver, bc, canada
|
|
Yes, very cool idea, thanks.
I'm pulling pretty hard these days, but need to have a 2nd gear if needed.
I'll do a drawing of it soon... but, the lever/hinge could be an inverted wall hauler on the rope (on the other side of the minitrax.
thanks,
b
|
|
paganmonkeyboy
climber
mars...it's near nevada...
|
|
"Next time I'll speed solo it with out any extra water ok?"
Brad -
Yer sick. Totally inspiring. Kick ass and take names...
-Tom
|
|
bradthatclimbs
Big Wall climber
vancouver, bc, canada
|
|
so, no wall hauler spring to beat, just the weight of the ti bloc and biener. So, the blue cord just needs a little spring (bungee cord) to have it return after each pull.
kicker is.. remember touching the void? Well, my hands are as bad as when Joe needed to jug the rope. I need to be able to, "change gears", quickly on the route.
getting closer to a solution.
Oh, and yes, that is 5:1 above.
|
|
WBraun
climber
|
|
Stop using that mini-traxion and rope thing, (forgot what it's called),(top piece), for this type of application.
The teeth on them are two sharp. The mini-traxion's pulley wheel is very small and you lose a lot of efficiency.
There's better and safer alternatives for the application you are seeking.
|
|
bradthatclimbs
Big Wall climber
vancouver, bc, canada
|
|
The "ti bloc" teeth you mean? I weight the thing slowly, it does not the rope like it would if you were jugging with it.
the mini-trax is not the pulley -- its just used as a cam there, as the rope passes straight through the rig. So, the pulley diameter is an issue at the station, not on my end.
thoughts?
thanks,
brad
|
|
bradthatclimbs
Big Wall climber
vancouver, bc, canada
|
|
The plan is for May -- but changes on schedules with peoples work. (film crews etc)
Would be good to be there for face lift to meet people in person.
brad
|
|
bradthatclimbs
Big Wall climber
vancouver, bc, canada
|
|
Does anyone have pictures, maps or video of the hike from the summit (zodaic) to the flats?
thanks,
brad
|
|
Ed Koala
Trad climber
Banchory
|
|
|
Jul 24, 2013 - 08:46am PT
|
Was this project completed? I'm starting to look into something similar ...
|
|
Crazy Bat
Sport climber
Birmingham, AL & Seweanee, TN
|
|
|
Jul 24, 2013 - 05:26pm PT
|
I've been told there will be another very very long rope rigged from El Cap next year. PM me and I will see if I can hook you up with them for a teathered rappel.
Sorry I didn't notice the date of the original posting. If anybody else is interested let me know.
|
|
ElCapPirate
Big Wall climber
Reno, Nevada
|
|
|
Jul 24, 2013 - 05:49pm PT
|
If I remember correctly, they ended up bailing but the system was working... but I could be wrong.
Edit: But, I think he succeeded on The Cheif.
Sending PM, Ed
|
|
|
SuperTopo on the Web
|
Let us know!