https://makezine.com/article/science/energy/backpedaling-but-in-a-good-way/
Backpedaling, but in a good way... - Make:
May 12, 2010 - MAKE subscriber Steve Hoefer sent us a link to this fascinating piece on retro-direct drives for bikes. Not really sure how practical it is, but the
but ina goodbackpedalingwaymake