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How much less drag when mirrors are folded?

Discussion in 'Model 3: User Interface' started by SOULPEDL, Aug 19, 2018.

  1. SOULPEDL

    SOULPEDL Member

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    Jul 25, 2016
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    Arizona
    Elon on this Wed interview mentioned how having side mirrors can cause a 5% drag at highway speeds. So I tried folding them in at speed, but they don't stay there. It may only contribute to 1-2% because they are still present, but I wonder if they've measured it? I bet it would make a difference on those endurance runs through.
     
  2. Derek Kessler

    Derek Kessler Member

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    Location:
    Cincinnati
    The mirrors are designed to be as aerodynamic as possible given that they have to be there. They're certainly not designed to be more aerodynamic when folded — certainly they're sticking less when closed, but the inside face that's now the forward face is designed to be a surface that air slips past without making too much noise and not one that cuts through the air at 60+ mph. I'll bet efficiency is worse with the mirrors folded.
     
    • Like x 1
  3. ShockOnT

    ShockOnT ⚡️⚡️⚡️⚡️⚡️

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    Sydney
    Very difficult to measure outside a wind tunnel. My guess would be more efficient folded, because the primary variable is cross
    area.
     

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