The Real Problem
The real problem with this concept is that humans can not maintain more than 100watts with their legs and even that takes more effort than you can think.
We set up an exercycle to a dc motor generator and it was very heard for me just to maintain even as much as 40 watts. even David Butcher (the best expert on pedal electrics) says he cannot maintain more than 75 watts even when warmed up.
And if you do not have a heavy fly wheel every thing gets much harder, because of the lack of momentum in the dead spots of cranking. I can ride my bike to town every day at a low speed and have plenty momentum to rest my legs.
I think people are insane to want to move faster than a bicycle can.
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