December 19, 200916 yr I have no idea if this idea has been tried or is even in production. The chainring and smaller inner motor drive are fixed to each other on a crank that uses a freewheel pawl system like a rear cassette. also the drive sprocket on the motor has a freewheel system too. So you can have electric power without the need to turn the pedals, also pedal power without the motor turning, and of course a combination of the two. It seems like a good idea to me? or am I missing something? I guess it would look similar to a sunstar system on the Dahon Boost.
December 19, 200916 yr Author Just found this amazing machine Endless-sphere.com • View topic - Miles' Project 1 [eMoulton] It looks like the gearing on my idea might be a bit on the low side
December 19, 200916 yr That e-Moulton is lovely. The folks at Endless-Sphere generally seem more interested in high-power direct-drive or geared hub motors. The Germans on their Pedelec forum are very prolific in building crank-driven e-bikes using small lightweight low-power motors like the Tongxin of Mini-FWF. My jaws drop looking at some of their elegant realizations ! The performance seems good too. I don't speak German but I use Google-Translate to browse their discussions. Cheers, Dan Pedelec-Forum
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