Quote:
Originally Posted by aerohead
The car's near-field flow interfered with the mirror, while the mirror's near-field flow interfered with the car.
By moving the mirror away from the body, to perhaps the initial outboard streamline's distance, it essentially began to 'fly in formation' with the car, neither affecting the flow of the car, or vice versa.
And this also relied on careful shaping of both the mirror housing and mounting strut.
An added side benefit was a lower acoustic signature ( noise-vibration-harshness ).
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Is that why companies put vortex generators near the mirror if it’s closer? So it controls the bigger and more wild vortex’s between the car and mirror?