Gyro-car-1907-,Louis Brennan’s vehicle ran on a single rail, stabilized by ingeniously-designed spinning fly-wheels[ GYROSTAT ]so that it stayed upright even when fully loaded.

A gyrocar is a two-wheeled automobile. The difference between a bicycle or motorcycle and a gyrocar is that in a bike, dynamic balance is provided by the rider, In a gyrocar, balance was provided by one or more gyroscopes,A major drawback is that many cars - including passenger and freight cars, not just the locomotive - would require a constantly powered gyroscope to stay upright.