Handcycle project

Ah I see
As a suggestion, maybe a thumb throttle with cruise control and ebrake interlocks. That way the throttle is not engaged while in cruise...so when cruise stops with brake, throttle is not stuck in position.
A trigger throttle would be bad ass
 
Wheels_78 said:
...they're difficult to implement because of how much your cranks and hands are moving around while you pedal. It would be hard to use the throttle smoothly, and I'm not sure the wiring would stay reliable when it's getting flopped around non-stop. The shift and brake cables are pretty tough pieces but even they break often enough that the bike comes standard with the auxiliary brake.
Click to expand...
Moving over discussion of the CA V3 AuxPot PAS level adjust from the V3 thread:

Looking at you rig a little more, I see some of the concerns about both cable/wiring robustness as well as the issue with fine motor control while pedaling. I'm thinking at this point that smooth control of a pot or friction shifter for setting AuxPot may be difficult and that maybe a multi-position or detented adjustment would be better.

One solution might be to add the stub bar to the left grip and mount up a thumb index shifter - the more speeds the merrier. Then route the cable to one of gwhy!'s hall throttle boxes. The cable situation would be similar to the brake cable on the right side but would actually have almost no tension on it - should be pretty rugged. This could give you pretty easy and reliable thumb up/down assist for 7-10 levels. Something like an SRAM 7spd X.3 trigger might be a good choice - both paddles are pretty close together, out of the way, and easy to hit with the thumb (not exactly tiny, but...). Here I was thinking that fancier tinier shifters that use a forefinger pull to release might not be as desirable (?).

throttle hardware interface.jpg
If you were going to have both electrical and shifter cable stuff on the same handle, I would just route the wires along the cable and maybe slip some braided plastic sheathing over it. For electric-only, you might fly a dummy shifter cable just to have something onto which to tie the wiring.

I looked at a Varna in action on YouTube and I see the concern about the motion. The vid also straightened out a misconception I had that this was more like rowing instead of cranking... hard to tell from the still snap above.

Anyhow - just some thoughts... :D
 
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