TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker or making a Paypal contribution here: paypal.me/SupportTMC

took my baby to the wind tunnel

Discussion in 'Model S' started by leilanimunter, Jan 13, 2014.

  1. leilanimunter

    leilanimunter Member

    Joined:
    Jun 12, 2013
    Messages:
    231
    Location:
    Charlotte, NC
    #1 leilanimunter, Jan 13, 2014
    Last edited by a moderator: Mar 13, 2016
    My #55 race car went to the wind tunnel prior to going down to Daytona testing (I was 6th quick of 78 drivers at the Daytona test! :biggrin:) and since the wind tunnel hadn't had a Model S in before, they asked me to come back with Phoenix! She has a lower coefficient of drag than my Daytona race car. Here is video from our visit...



    And a few photos...

    tunnel1.jpg tunnel2.jpg tunnel5.jpg windtunnel_sm.jpg WindTunnel2sm.jpg WindTunnel3sm.jpg
     
  2. ElSupreme

    ElSupreme Model S 03182

    Joined:
    Jan 13, 2012
    Messages:
    4,279
    Location:
    Atlanta, GA
    So I put this up on Twitter the other day, when @TeslaMotors tweeted it.

    "Is that really surprising? Don't most race cars burn lots of aero for downforce?"


    I mean this is about as un-aero as you can get.
    spoiler1.jpg


    Cool pics and video though!
     
  3. leilanimunter

    leilanimunter Member

    Joined:
    Jun 12, 2013
    Messages:
    231
    Location:
    Charlotte, NC
    at Daytona we are taking as much drag out of the car as possible to make up for the lack of HP due to the restrictor plate. I'm not saying my race car was far off, it was very close.
     
  4. Denarius

    Denarius Active Member

    Joined:
    Apr 27, 2013
    Messages:
    1,349
    Location:
    Utah
    Excellent video! Thanks for sharing it!
     
  5. 7racer

    7racer Member

    Joined:
    Jun 13, 2011
    Messages:
    755
    Hey Leilani,

    for us weekend HPDE/time trial guys is there any benefit to getting our cars put into a wind tunnel or is it too cost prohibitive?

    Also, what kind of down force numbers do you like to see?
     
  6. stevezzzz

    stevezzzz R;SigS;P85D;SigX

    Joined:
    Nov 13, 2009
    Messages:
    6,062
    Location:
    Colorado
    Those are really nice photos, Leilani. Did you take them, or did the wind tunnel operator?

    The video really shows just how slippery Model S is; the only big opportunity I see for improvement shows up as vortex shedding on the sides, as the flow wraps around the nose and encounters the forward wheel wells.
     
  7. EdA

    EdA Model S P-2540

    Joined:
    Mar 24, 2011
    Messages:
    1,889
    Location:
    Massachusetts
    The video and pics are awesome! Thanks for sharing.

    You've got to do something about the license plate incandescent bulbs though! :)
     
  8. leilanimunter

    leilanimunter Member

    Joined:
    Jun 12, 2013
    Messages:
    231
    Location:
    Charlotte, NC
    It's pretty expensive, I only got to do it because they had never had a Model S in the tunnel and they were testing my race car anyway. On the race car downforce, my team is pretty secretive about the numbers. It varies track to track. At Daytona we try to minimize drag because of the lack of horsepower due to the restrictor plates.
     
  9. Discoducky

    Discoducky Active Member

    Joined:
    Dec 25, 2011
    Messages:
    2,884
    Location:
    Seattle
    Wind tunnel time for a large surface area can run around $1K/hr. It is about $100/hr for bikes last time I checked.
     
  10. 7racer

    7racer Member

    Joined:
    Jun 13, 2011
    Messages:
    755
    you're are awesome! thanks for taking the time out to reply!
     
  11. Eeyago

    Eeyago Member

    Joined:
    Oct 30, 2012
    Messages:
    75
    Location:
    Reisterstown, MD
    That was very cool to watch. Thanks for sharing!
     
  12. chickensevil

    chickensevil Active Member

    Joined:
    Jan 2, 2014
    Messages:
    4,134
    Location:
    Virginia, United States
    Any chance you were able to confirm the Drag Coefficient of the car at .24? As far as I have been able to tell only Tesla has posted this number on the car, and it would be nice to confirm this from an unbiased (hopefully) third party. Not that I don't trust Tesla, but it is always nice to have these things confirmed.

    Also, really cool video, so thanks for running it through for us!
     
  13. dailydriver

    dailydriver Member

    Joined:
    Nov 23, 2012
    Messages:
    209
    Location:
    Naperville IL, USA
    Great pics and very cool video. Thanks for sharing!
     
  14. Raffy.Roma

    Raffy.Roma Active Member

    Joined:
    Jul 22, 2012
    Messages:
    3,209
    Location:
    Rome (Italy)
    + 1 :smile:
     
  15. brianman

    brianman Burrito Founder

    Joined:
    Nov 10, 2011
    Messages:
    15,487
    And how many hours does it usually take?

    - - - Updated - - -

    +1
    Hope she'll see this and reply.
     
  16. Discoducky

    Discoducky Active Member

    Joined:
    Dec 25, 2011
    Messages:
    2,884
    Location:
    Seattle
    For a bike about 2 hours . A car might be more or less depending on the telemetry you want to collect, but with a bike there is a tweaking of position and I'd bet if you just want a CD/CoD then it might only be an hour of time billed.

    Also, I wonder if the downward force curve was returned for this S tunnel test?
     
  17. leilanimunter

    leilanimunter Member

    Joined:
    Jun 12, 2013
    Messages:
    231
    Location:
    Charlotte, NC
    This video from the wind tunnel. Just... OMG... No words. Instagram
     
  18. Raffy.Roma

    Raffy.Roma Active Member

    Joined:
    Jul 22, 2012
    Messages:
    3,209
    Location:
    Rome (Italy)
    Cool! :cool:
     
  19. JRP3

    JRP3 Hyperactive Member

    Joined:
    Aug 20, 2007
    Messages:
    10,129
    Location:
    Central New York
    I have the answer :biggrin:

    Model S skirt2.jpg
     
  20. SCW-Greg

    SCW-Greg Active Member

    Joined:
    Jun 13, 2012
    Messages:
    1,703
    Location:
    Beaverton, OR
    You tease!
    Give us more than 15 seconds. That was cool.
     

Share This Page