Talk:Rowan's portable pedal power generator
Disadvantages: Given that the electricity generator is mounted on the wheel, there are friction losses as rubber on rubber does not transfer the energy completely. It would be better to mount the electricity generator directly unto the hub (but make it removable so the bike can still be used for transport aswell). Even better would be to weld a large gear on the wheel (just smaller than the bicycle wheel) on which the electricity generator is mounted by means of another gear (gear placed around the electricity generator). The generator would, spinning on a vertical axis, then take advantage of the larger gear (or perhaps belt drive, see http://www.endless-sphere.com/forums/viewtopic.php?f=6&t=5313 ) to attain far greater speeds (which results in larger quantities of produced electricity).
Another disadvantage is that once the battery connected to the electricity generator is filled, extra pedalling will not generate any more energy (the battery needs to be depleted first). One possible solution is to have net metering installed at the home electricity system. --06:17, 3 January 2011 KVDP