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Folding Mirrors?

Discussion in 'Model S: Driving Dynamics' started by WMAC, Mar 23, 2016.

  1. WMAC

    WMAC Member

    Nov 19, 2015
    Nashville, TN
    Is there any information on the aero pros and cons of folding mirrors during highway driving besides the obvious not being able to use them?
  2. StaceyS

    StaceyS Member

    Jul 10, 2015
    Bend, OR United States
    Gut feel, seat of the pants engineering answer: Folded is worse than not because the car was designed to have the mirrors out at speed. If they're folded, the aero shape is at an angle to the wind.

    Easy experiment: Drive 70 mph with the mirrors out. Fold them in. If wind noise gets louder, you're less aerodynamic.

    My car's mirrors don't fold electrically, so I just leave them out...
  3. dlv1984

    dlv1984 Amp'd

    Feb 23, 2016
    Davis, CA
    What about folded and taped over? ;)
  4. CHG-ON

    CHG-ON Still in love after all these miles

    Jun 24, 2014
    Santa Cruz Mountains, USA
    When I go to the spray-it-yourself carwash for a quick rinse I get on the highway and floor it to get all the water off before it spots. I tried folding the mirrors to see if that would dry them off faster. It seems, from the way the droplets wiggle around, that there is actually more turbulence than when open and it makes no difference in drying them. I don't hear any difference in wind noise.

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