4 ms·
I like it but I'm curious how this compares to a hand crank like on one laptop per child
by wavesounds 13y ago
I like it but I'm curious how this compares to a hand crank like on one laptop per child
- diydsp 13y agoHandpower delivers about max 20W per hand to a bike with both hands. With electromechanical efficiency, 20W per hand comes out to around 1-10W per hand, depending on hand speed and generator efficiency. [1] http://www.amazon.com/Bicycling-Science-David-Gordon-Wilson/dp/0262731541 http://www.amazon.com/Bicycling-Science-David-Gordon-Wilson/... [2] http://dspace.mit.edu/handle/1721.1/69801 http://dspace.mit.edu/handle/1721.1/69801