More tidbits from the Chalmers PDF:
Other notables from the PDF (it's definitely worth a read for anyone who hasn't seen it yet):
- "A very well designed mirror increases the drag of a car of approximately ΔCd=0.012. But this value can reach 0.025 to 0.030 for the worth [worst] designs. Actually it seems reasonable to think that the average value for ΔCd is of around 0.015 (ref. 9)."
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- "...[the mirror's] combination with the A-pillar contributes to the creation of trailing vortices at the side front of the car, which are highly drag-consuming."