| 摘要 |
The present invention comprises an improved track which increases the speed of a gravity-driven racing car. Firstly, a micro-grooved wheel rolling surface increases the friction for lateral movement of the car wheels through a fingerprint effect, thus straightening the trajectory of the path to the finish line. Secondly, this effect also reduces the amount of sideways movement towards the central guide strip and the associated bumping velocity. Thirdly, a low-friction material on the central guide strip reduces the frictional drag when contacted by a car's wheels. Fourthly, the micro-grooved surface also reduces the contact area between the wheel and the track surface causing a reduction in rolling friction. Finally, the micro-grooved rolling surface in combination with the low-friction guide strip material have a synergistic effect since the coefficient of sliding friction between a wheel and low-friction guide strip material is lessened because of a reduction in lateral velocity of contact.
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