Leonardo Da Vinci designed a wooden, clock-work car in 1495. The designs, on page 812R of the Atlanticus Codex, were only interpreted correctly a few years ago and a working model was actually made. With the exception of flywheels, storing energy in a mechanical form never caught on. Wooden cars were popular, for a time, as you can see in a video below the fold. The car of the future will probably be made from carbon fibre and use a chemical battery. Steampunk fans like myself still hold out hope for a modern wind-up, wooden car.
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