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Thomas Edison said "to invent,you need a good imagination and a pile of junk". Looks like you are well on your way!

Amazing! I learned something today. the second video didn't seem to have any kind of fly wheel at all. (i still think i'd use one so i could coast every once and a while though :) ).

not an engineer by any means but i would think that a heavy fly wheel would be needed to carry enough energy to handle that much resistance.