Why do some sports cars have moving spoilers?

Question

So when you play games (say Forza Horizon) and you see the more high end sports cars have spoilers that move up and down when it comes to high speeds and breaking instead of being static. Why do some cars do this? What’s the benefit to the engineering behind it?

In: Engineering

Answer 1

At high speeds the car becomes like a wing of a plane. The fear is that the car lifts off the pavement enough to reduce the tyre friction and reduce transmission of power from the engine to the pavement. The spoiler ‘spoils’ the air flow over the car and pushes the back end down into the road, increasing friction and potentially increasing velocity.