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Fill 'er Up!: Want a super smooth finish on porous balsa wood? Before painting, use a wood filler and sanding primer to fill problematic end-grain areas. More Tips |
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Depending on a car’s design, friction may occur between the wheel and axle or the axle and body material. An often overlooked fact: Smaller diameter wheels rotate more times as they travel a given distance than larger diameter wheels do. Therefore, friction is more prevalent with smaller diameter wheels.
Friction also occurs between the wheel and the track surface. In a passenger car, friction between the tire and road surface gives you traction, which is a good thing. The wheels, however, do not propel a CO2 car, so the less wheel/road surface friction, the better.
While friction may be reduced for better performance, it cannot be totally eliminated.
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