Do Car Spoilers Prevent Vehicles from Taking Flight?

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Spoilers are primarily designed to reduce lift and improve traction at high speeds, enhancing vehicle stability. While they can add some drag, the impact on acceleration and speed is generally minimal for most street cars. The discussion highlights that spoilers are often more about aesthetics than performance for everyday vehicles, with serious racers benefiting more from their aerodynamic advantages. Misconceptions exist regarding their necessity, as many high-performance cars do not require spoilers due to their inherent design. Ultimately, spoilers can be beneficial in specific racing contexts, but for typical driving, they may not be essential.
  • #31
According to the Bernoulli's Effect "The pressure in a fluid decreases with increased velocity of the fluid. (The faster the liquid moves, the lesser is the pressure in that liquid.)"
So the air must travel faster across the top of the car, decreasing the pressure, causing the car to have more lift from the less dense air. there is no kind of new upward pressure toward the bottom of the car.
Yes there is upward pressure on the bottom of the car, but it does not increase.
 

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