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Front license plate - does it actually affect Wh/mi?

Discussion in 'Model S: Interior & Exterior' started by cybrown, Jul 22, 2013.

  1. cybrown

    cybrown Member

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    Apologies if I've missed previous data on this one - has anyone actually performed a controlled experiment testing the differing drag forces with and without a front license plate? Does a front plate affect the drag enough that your Wh/mi show noticeable increase? Is there any difference between the various front mount options (on nose, on grille below nose, etc.)? I live in MD where front plates are required, but I might be willing to risk a ticket if it makes a big difference in power usage.
     
  2. GlennAlanBerry

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    I am willing to bet that having a front license plate on the Tesla Model S hurts the cd somewhat (not to mention the looks). I know quite a few people are just going without, until and unless they get a fixit ticket.
     
  3. K5ING

    K5ING MegaMiler

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    I wonder about the legalities of producing a photorealistic decal, or "wrap" of your license plate to apply to the nose. It wouldn't help the looks issue too much, but it would solve the aerodynamic and mounting issues.
     
  4. dsm363

    dsm363 Roadster + Sig Model S

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    At least in Texas that is considered not legal. It must be the physical plate given by the state. Likely the same in other states as well.
     
  5. K5ING

    K5ING MegaMiler

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    It may not comply with the letter of the law, but as long as it was readable by license plate readers, it would comply with the spirit of the law, especially when the alternative is no plate at all. In other words, I'm guessing most cops would give you a "pass" on it as opposed to having no plate.
     
  6. dsm363

    dsm363 Roadster + Sig Model S

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    It would act like no plate though in that if they wanted to pull you over or they already had pulled you over for speeding then they'd use that against you. I would love the vinyl plate option and hope state legislators start officially supporting it.
     
  7. Lloyd

    Lloyd Active Member

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    It does not supply to 'radar signature' that is needed for the local municipalities to be able to more easily judge your speed and issue you a citation.
     
  8. K5ING

    K5ING MegaMiler

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    I agree, but it may keep you from getting pulled over *just* for not having a front plate (which has happened to me...thank you DPS). If it could be approved, it can still be issued by either the state or any third part plate supplier such as MyPlates in Texas. It would have to be properly contoured for the car it was going on unless it's going to be on a perfectly flat surface tho.

    Yeah...too bad about that. :tongue:
     
  9. bollar

    bollar Disgruntled Member

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    It seems like the cool solution would be to modify the nose cone to fit a recessed plate and put a Lexan or other clear cover over the plate so that the front drag is not altered. This would be legal in Texas -- maybe other states have a different requirement.

    In any event, I shed a tear each time I see a nice car with a front license plate.
     
  10. drees

    drees Active Member

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    I highly doubt you'd be able to measure any difference outside of a very sensitive wind-tunnel. Mounting it in front of the grill opening it might reduce Cd. On the nose-cone it will be negligible either way. There's simply not a lot of air flowing over the plate - the blunt shape of the bumper creates a high pressure zone that air flows over fairly readily.
     
  11. Quacker

    Quacker Member

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    If you get a fixit ticket just temporarily install the front plate using velcro or tape, and grind down some screws and glue the ends of them to the holes to make it look like you actually screwed the plate in.
     
  12. alexkiritz

    alexkiritz Member

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    TEG did it on the Leaf.

    My Nissan Leaf Forum View topic - Charge port door license plate experiment
     
  13. Quacker

    Quacker Member

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    It's illegal to cover the license plate with anything in cali, you'd be more likely to be pulled over with that than not have a front plate on at all.
     
  14. scaesare

    scaesare Active Member

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    I believe the guys who did the Center Console Insert (soflauthor ?) were working on something like this...
     

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