Quote:
Originally Posted by aerohead
That's a box-cavity behind the mirror.It captures a vortex,allows a pressure rise,reduces the wake,and increase base pressure, while adding length (fineness ratio ).
It's good thinking.
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Hmmm that reminds me, some cars have much longer (in the sense that you used the word "length") mirrors than usual but some lowish drag cars have your typical flat brick shape mirror, does adding extra length help a lot? I'm guessing it's not more common because you have to pay attention to interference drag if the mirror is near the A pillar.