Quote:
Originally Posted by Xringer
Much of the air flowing around the car is going to be turbulent.
But, it really doesn't make much difference if it's smooth air
or turbulent air, if you stick something (an object) into a place
where fast moving air is going to hit it, so it can pick up wind energy,
that device is going to product extra drag.
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But following that logic, a spoiler that protrudes into vortices to smooth airflow would create more drag just by having air hit it, which isn't the case