With only a small gap between the skirts and the track surface, the suction of the fan is able to generate a low pressure region under the car. This sucks the car down on to the track. Pictured is ...

However, for small radio control cars, adding a fan for a little suction can achieve even greater feats, as demonstrated by this build by [DD ElectroTech]. The build began as a simple two-motor ...

The only F1 car with a 100 per cent win record. The F1’s twin fans were more subtle than the T50’s. Same principle though: ...