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

Does direction of wheel rotation matter?

Discussion in 'Model S: Driving Dynamics' started by Mayhemm, Sep 4, 2015.

  1. Mayhemm

    Mayhemm Model S P85+ "Lola"

    Joined:
    Nov 9, 2012
    Messages:
    1,939
    Location:
    Saskatchewan, Canada
    I was watching a car show recently where they discussed all the design changes made to vehicles in the last few years in an effort to increase aerodynamics and they talked about how the spokes on a rim are designed to direct air past the car while spinning. This got me thinking about the wheels of my own car and what would happen if they were mounted such that they spin the wrong way, creating an anti-aerodynamic effect.

    There has always been a significant reduction in range on my car when running my 21" summer wheels as compared to the 19" T-Sportlines I use in winter. I'd always assumed it was due to the increased rolling resistance of the sticky summer rubber, but what if I put the turbines on the wrong way and air isn't flowing past them properly?

    To my knowledge, I don't remember anyone talking about the Tesla turbines (or cyclones) having an intended direction of rotation independent of the tires mounted on them. Can anyone speak to whether this matters or not? Are the Tesla wheels intended to spin in either direction? What about common turbine alternatives like Rial Luganos or T-Sportline rims?

    Please keep in mind that I'm concerned with the wheels themselves, irrespective of the rubber mounted to them.
     
  2. WarpedOne

    WarpedOne Supreme Premier

    Joined:
    Aug 17, 2006
    Messages:
    2,661
    Location:
    Slovenia, Europe
    If rims were directional they would come in pairs - two left and two right.
    If all 4 are the same than 2 on the left them will always spin "in reverse" to the two on the right.

    So, the answer is: current turbine rims are not rotationally optimized. But future rims might be.
     
  3. DFibRL8R

    DFibRL8R Member

    Joined:
    Jan 17, 2013
    Messages:
    665
    Location:
    Leesburg Virginia
    This was discussed on another thread since someone noticed in a website photo the turbine is shown to have a different direction of rotation depending on which side was shown unlike the reality where all turbines are oriented the same way.

    21 Wheel Rotational Direction
     
  4. Mayhemm

    Mayhemm Model S P85+ "Lola"

    Joined:
    Nov 9, 2012
    Messages:
    1,939
    Location:
    Saskatchewan, Canada
    Dammit! I searched for a thread on this topic before posting (figured SOMEBODY had asked the same question) but didn't find anything. Could be because the thread is ancient (2012).
     
  5. DFibRL8R

    DFibRL8R Member

    Joined:
    Jan 17, 2013
    Messages:
    665
    Location:
    Leesburg Virginia
    Yeah, u feel like it gets harder and harder to have an original thought on TMC lately!
     

Share This Page