Achilles
Well-known member
tyrel said:This doesn't make any sense to me. First of all, you'd have to be driving three hundred miles an hour to cause enough lift to lose control of the car. I always laugh whenever I'm behind a crossfire or a porsche or some other car that has a speed-sensitive spoiler on the back that pops up at forty miles per hour to keep the car from losing control and hitting a tree. The effect of lift is greatly exaggerated by car companies, I suspect so that they can sell more optional rear spoilers. The myth of controllable lift is akin to the myth of additional horsepower from a K&N air filter. If lift were really a problem, and if it could be controlled simply by not lowering the car or installing spoilers, then every car would already come with a spoiler to ensure that the car stays on the road instead of hitting a tree. If lift were really a problem, then all of the ungainly and unaerodynamic Volkswagen Things from decades ago would have left the road and hit trees due to wind buffeting and lift (instead, they have happily rusted into oblivion). Cars are heavy enough that lift isn't a problem unless you're driving three hundred miles an hour, I'd say the bigger issues are adequate suspension components and the car's ability to deal with lateral forces.
I don't think leaving the ground is as much an issue as stability at high speeds. I'm sure the car companies test the aero package on their cars and they should know what their doing by now.
G. Winter has a good point...A small dent in the nose of a NASCAR can upset the stability of the car at high speeds. Areodynamics are essential at high speeds. Why do you think the C-6 doesn't have pop up head lights? Try driving your car at 120 mph with 2 bricks strapped to the hood.




