Quote:
Originally Posted by MetroMPG
Those drag curves are fascinating. Thanks for posting them.
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The induced drag is exactly why spoilers and wings will not help FE on a car (especially because their angle of attack don't go down with airspeed the way a plane's wing does). VGs create drag the same way but can be helpful in a few rare cases where there is an advantage to prolonging laminar flow instead of (earlier) airflow separation into turbulance.