I know it could be possible with today's new materials to make a bike or car using a special spring
Then creating a gearing for this incorporate this into something that rewinds itself -As would be in a continual motion windup device which can be started using solar power.
Still there is the magnet car also which I like better myself.
Don't let the current trend fool you by the way that GLOBAL WARMING IS NOT HERE! Get your info from the science channel*
Then creating a gearing for this incorporate this into something that rewinds itself -As would be in a continual motion windup device which can be started using solar power.
Still there is the magnet car also which I like better myself.
Don't let the current trend fool you by the way that GLOBAL WARMING IS NOT HERE! Get your info from the science channel*