They probably are more efficient because they don't flop down as long as the system is dialed in where the bungee doesn't become slack. It is also easier on the ankle, as the pull is straight off the top of the foot.
Something is not right with your setup if you are getting any set-back at all. That is the beauty of toothed ascenders.... I say this because I am questioning how much movement is in my own system, even a tight foot ascender can have 4-5 inches of slop between up and down. With both feet I am probably climbing 2 feet for every 1 I move up the rope.
Could the old school ascenders that float above the foot be more efficient?
Because climbing gear is so expensive. I buy DMM, Rock Exotica and ISC for anything life support. I could not justify 80 dollars for a turbo chest when it is for experimental purposes. If I climbed every day I would have bought a SAKA when they were still on the market. Maybe if I get everything dialed in I might make a proper knee ascended when the climbing budget allows.Just wondering why in heaven's name you bought a knock off anything. Especialky for climbing life support or not.
I built an experimental set-up using a cheap $20 chest ascender from ebay following the concept outlined in this thread. I had trouble getting the system working efficiently. One foot seemed to be fighting the other foot. I'm sure there is a learning curve to the technique. I'll post a picture when I can.
On a side note, I would recommend closely monitoring the cheap ascender's teeth on your rope. The blue one I bought had wicked sharp teeth and they wanted to pluck fibers when sliding up the rope. You could probably grind down each tooth individually to alleviate this issue...
I don't know yet. I plan on doing some testing this weekend. I will post updates as I go. I am going to test a bungee, a pulley and both. I might just get a retractable reel if I can't make something work well.The cat seems to approve. Your system is much more streamlined than mine with knots. Are you going to use a pulley at waist or chest height?
I think you may be on to something about trying to stand on both feet at once. I'll give it another go. My muscle memory is associated with my frog walker set-up.I'm just curious on what you mean by one foot was fighting the other? The only thing I can think of is trying to stand on both feet at once? If that is in fact what your trying to do, you will need some sort of spring or bungee to allow some stretch in the system.
There are knockoffs and then there are rebranded units. I do agree to a point, but if strictly for personal use and NON life support who cares? If it works it works, as long as you never cheat and use it as life support for even a momentJust wondering why in heaven's name you bought a knock off anything. Especialky for climbing life support or not.
The bungee I'm using just didn't have enough strength to pull the ascender up far enough for a decent step if only one strand was used. I found that doubling or tripling the bungee does provide considerable more strength to pull up the ascender when rope walking. I think it helps that the bungee is routed like a 3 to 1 mechanical advantage pulley system, giving more continuous length for the bungee to stretch.I like how you tripled the bungee, does that give it more pull?
I have almost the same setup with exactly the same cheap blue chest ascender but I made the cord to the footloop from NE 7mm cord, been working great so far.