With the additional downward force, the only way for the forces to balance to zero is for the normal force to increase. Consequently, the frictional force becomes greater, leading to a higher acceleration.
Instead of achieving a maximum acceleration of 6 to 7 meters per second squared, much higher values, such as 15 or even 20 m/s², are possible. The McMurtry Spéirling in the video accelerated from 0 to 60 mph in just 1.4 seconds, a feat that vividly demonstrates its performance capabilities.
The concept of utilizing fans for this purpose is not new. In 1978, the Brabham BT46B employed this strategy to win the Formula 1 Swedish Grand Prix before the practice was swiftly banned. However, the idea of increasing downward force persists. Modern F1 cars cleverly channel airflow through their bodies to achieve a similar “ground effect,” officially to cool the engine, although it serves an additional purpose.
While these airflow systems effectively aid in engine cooling, the primary intent is widely recognized as generating low pressure under the car to bring it closer to the road surface. For instance, the new McLaren W1, which has recently been reviewed, highlights this feature in its sales pitch. This road car, priced at $2.6 million, has a limited production of only 399 units.
This enhanced acceleration is not solely for increased speed; it also allows the vehicle to decelerate more quickly and execute sharper turns, as these maneuvers are also forms of acceleration. The added downward force can transform a fast car into an exceptionally fast one, catering to those seeking high performance.
