The Gyrocar reference article from the English Wikipedia on 24-Jul-2004
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Gyrocar

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A gyrocar is a two-wheeled automobile. Wheels provide static stability, propulsion, steering and dynamic stability. Two wheel vehicles get stability from gyroscopes, propulsion and steering from wheels.

The difference between a bike and a gyrocar is that in a bike, dynamic balance is provided by the rider. In a gyrocar, balance is provided by the vehicle itself.

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