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Engineering Prototypes (EPs)

Discussion in 'Roadster' started by TEG, Aug 12, 2007.

  1. TEG

    TEG TMC Moderator

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    #1 TEG, Aug 12, 2007
    Last edited: Dec 31, 2010
    When Tesla first started up they built a clay model to validate the body styling.
    (This model has since been destroyed)

    They also built a "buck" for aerodynamic testing.
    And a "mule" which is drivable but was cobbled together from a non-Tesla vehicle with custom bodywork.

    Then they built "Engineering/Evaluation Prototypes" (EPs) to figure out what refinements were needed for production.

    Finally they built "Validation Prototypes" (VPs) to test the refinements before putting them into production.

    Along the way they had to crash test a number of the prototypes so not all still exist.

    From the Tesla blogs:

     
  2. TEG

    TEG TMC Moderator

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    "EP1" ("Engineering Prototype 1" ... "Obsidian Black"):
    tesla.jpg
    IMG_1692.jpg

    "EP2" ("Engineering Prototype 2"... "The most seen press car"... "Radiant Red"):
    Tesla.jpg 300px-TeslaRoadster-front.jpg
     
  3. TEG

    TEG TMC Moderator

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    EP3? ("Glacier Blue?") European test vehicle? (Shown at Goodwood festival of Speed?) Crash tested?:
    glacier_blue.03.jpg

    EP6 (Non Tesla Blue Color?) European test vehicle... now in the USA (or is this EP4?):
    [​IMG]

    EP4? ("Very Orange") European test vehicle? :
    [​IMG]

    EP5 ("Brilliant Yellow") European durability test vehicle? (now confirmed back in the USA with transmission upgraded) :
    [​IMG]
     
  4. TEG

    TEG TMC Moderator

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    #4 TEG, Aug 12, 2007
    Last edited: Feb 22, 2008
    We may not have seen these colors yet: Fusion Red, Jet Black, Racing Green.

    There were 10 EPs made. EP1 (black) & EP2 (red) are the most seen press cars. EP2 was used for most of the pre-sales rides.
    EP5 (yellow) & VP1 (green) have been spotted a lot in the bay area doing durability testing.

    I am not sure of the current fate of the other 6 EPs.
    (perhaps 3 or 4 went to crash testing)
     
  5. TEG

    TEG TMC Moderator

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    EP3 FMVSS testing

    crash_test.jpg
     
  6. TEG

    TEG TMC Moderator

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    #6 TEG, Aug 12, 2007
    Last edited: Feb 28, 2008
    Thunder Gray in Sweden (EP10?) :
    tesla_on_ice.jpg
     
  7. TEG

    TEG TMC Moderator

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    Notice that both the Sweden test vehicle and mystery blue car have foglights installed.
     
  8. TEG

    TEG TMC Moderator

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    More EP6 from the "Blowing Hot and Cold" blog:
    [​IMG]
    [​IMG]

    And here
     
  9. tonybelding

    tonybelding Active Member

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    It's either the Magnetic Blue car with really poor lighting, or it's what Lotus refer to as "Midnight Blue" which is a super-dark metallic blue.

    Yes, the Elise is available in three different shades of metallic blue: Midnight Blue, Magnetic Blue, and Laser Blue. Tesla's Electric Blue is apparently the same as Lotus's Laser Blue, based on the photos of VP 9.

    CORRECTION: The darkest blue that Lotus offer is Nightfall Blue, not Midnight Blue. I had simply mis-remembered it.

    CORRECTION 2: I forgot about Polar Blue. The Elise is actually offered in *four* different blues.
     
  10. tonybelding

    tonybelding Active Member

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    Nightfall Blue mystery car

    http:[email protected]/1550098634/in/photostream/

    http:[email protected]/1549238141/in/photostream/

    The circumstances under which this car was photographed are a complete mystery to me. The poster claims to have taken the pictures with an iPhone and jokingly referred to it as "our Tesla".

    The color looks like what Lotus refer to as "Nightfall Blue". It looks good. . . It's a shame Tesla aren't offering it, or "Magnetic Blue" either.

    From what little I can see (tail light, seats), this car appears to be a VP. There was also an EP in Nightfall Blue, which we've seen earlier going through the salt spray test and freezing test.
     
  11. TEG

    TEG TMC Moderator

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  12. donauker

    donauker Member

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    The photos were taken at the Classic Car Club in New York this past Thursday the 11th. I have a few just like it on my cell phone. This is actually EP 6 and it had just arrived from the UK. I would have been much more excited to attend if it had been a VP, but I still enjoyed the opportunity to check out another EP with plenty of time to sit in it and imagine what it would be like to drive it.
     
  13. vfx

    vfx Well-Known Member

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    The crash test video Martin is showing has a few car colors. They are probably EPs.

    ----

    Comment from TEG : Crash test videos include a white one getting the side impact test. Perhaps that was VP4?
     
  14. TEG

    TEG TMC Moderator

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    Apparently it was retrofitted with VP taillights...

    The pictures had front plate holes that seemed to match the "blowing hot and cold" picture so I thought it might be the same car, but the new style tail-lights had me wondering.
     
  15. TEG

    TEG TMC Moderator

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    Looking through Martin's MPG talk, I am starting to wonder about EP4 vs EP6.

    On page 56 it says "EP4 Completed" and shows a blue roadster, yet I thought EP4 was orange.

    Also, on page 63 it says "EP4 & EP5" durability testing and shows a Yellow and Blue Roadster. (EP5 is the yellow one, so again they are saying that EP4 is blue)

    Perhaps both EP4 and EP6 are dark blue, and the orange one is a different EP?
     
  16. TEG

    TEG TMC Moderator

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    Can someone tell us which EP# this is? :
    1434337116_bec4f3f387.jpg
    1433474210_f99f299eda.jpg
    (on display at the Lotus factory)

    ...(pretty please)... Can't someone say?
     
  17. vfx

    vfx Well-Known Member

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  18. TEG

    TEG TMC Moderator

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    That is VP1 (green) and EP1 (black)
    [​IMG]
     
  19. doug

    doug Administrator / Head Moderator

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    The rear of EP6 at the LA store. Notice something missing?

    2462940396_054c34c8a6.jpg
     
  20. malcolm

    malcolm Active Member

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    Ooops

    Let's hope it's not the same adhesive as that used to bond the Aluminium chassis

    Zero to 1400 components in 3.9 seconds :biggrin:
     

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