Originally Posted by RallySport Direct
I love seeing that some research has actually been done here to substantiate the theory of VGs. I'm scratching my head a bit though (and this is just curiosity, not criticism), because in order for vortex generators to do what they're supposed to, shouldn't they be oriented at an angle to the relative airflow, as they are on airplane wings? If the vanes are mostly aligned with the airflow, where does the vortex come from? I would really like to see a car driven with a fully tufted rear windshield to see the airflow with and without VGs attached. The theory is sound, but I don't know if it's being applied correctly in most of these aftermarket parts.