Heh. Not so much doing as thinking. I still can't decide if this is a good idea or a silly one. And it's full of gotchas. I still think the kinds of motors we use would benefit from a 2 speed gearbox so you could get high torque-low speed for hill climbing and low torque-high speed for economy and outright speed. But actually achieving that is hard. If you have a long bike like a recumbent, trike or cargo bike with a long chain run then it's perhaps worth pursuing.I think jbond was working on something. There was a thread a while back covering the idea....
Put a freewheel on the crank/chainrings, so the crank only turns when you pedal. The motor still drives the chainrings without the pedals/crank turning. That’s the way the Cyclone system works, I use PAS with my setup OK.The problem is that my pedalling will turn the crank, which'll kick the motor into life, but the motor will also turn the crank, so there'll be no way of stopping it. Anybody got any ideas?
Das ist coool!If you check over on German pedelec forum this has been done quite a lot. I have seen it done by quite a few guys with a Tongxin motor.
Jerry
I'm thinking of my recumbent.... (always thinking about my recumbent ,,,)Heh. Not so much doing as thinking. I still can't decide if this is a good idea or a silly one. And it's full of gotchas. I still think the kinds of motors we use would benefit from a 2 speed gearbox so you could get high torque-low speed for hill climbing and low torque-high speed for economy and outright speed. But actually achieving that is hard. If you have a long bike like a recumbent, trike or cargo bike with a long chain run then it's perhaps worth pursuing.
I'm thinking of stripping off the electrics on my CX700 and installing on my recumbent as a chain drive solution ....Can you not just buy chain drive kits though?
The only thing I can really see the benifit of doing this is if you had a spare motor doing nothing.
Although .... if you can press one sprocket then I suppose you could press two! ... Then you could have a pure chain drive solution ... would be interesting to try both and see if there is any difference ...Hi Mel, Any progress? I'm thinking of doing something similar. Although I was thinking to fit another crank and copy the stokemonkey config.
Yes. I think if I am going to use a hub motor it will be split chain with a fixed sprocket to drive the rear and a freewheel connected to the crank ...Blimey, I hadn't realised how simple the Stokemonkey installation was.
Not sure that pressing the sprocket is going to be robust enough ... Dont think that is what the Germans have done ... but I'm still trying to figure that out ....Although .... if you can press one sprocket then I suppose you could press two! ... Then you could have a pure chain drive solution ... would be interesting to try both and see if there is any difference ...
Just been looking at this thread on the German forum:Not sure that pressing the sprocket is going to be robust enough ... Dont think that is what the Germans have done ... but I'm still trying to figure that out ....