I have read some old threads on here about water wheels and they have been a little helpful, but I want to ask about a wheel that doesn't use water. Let me set a mental picture. An eight foot diameter wheel that is more like a giant hamster wheel. The outside of the wheel has gear teeth. Engaged with the teeth is a generator. Basic ratio calculations 8' wheel to 4" gear at 7mph would run the generator. Generator I'm taking specs from is a gen that would hook to a pto of a tractor and runs 10kw. Now, the wheel would be built as close to balanced as possible and would be gotten up to speed from peddling a bike. I realize there may need to be some mechanical issues work out, but does the idea have any merit? This would only be a short term way to generate power. I'm thinking to charge batteries if solar or wind power hasn't been enough to build a full charge. Also, if use get the wheel spinning you wouldn't need to peddle only to keep it up to speed. Pick this apart I really want to know if I have a decent idea or if it's pure crap.