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SAE Vehicle Electrification Magazine features the Model S

Discussion in 'News' started by GSP, Aug 27, 2011.

  1. GSP

    GSP Member

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  2. tdelta1000

    tdelta1000 Active Member

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    What a nice write up on the Model S.
     
  3. TEG

    TEG TMC Moderator

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    Nice job they did on the multi-media aspect of that site. Embedded video clips and all.
    Does it play properly on a Mac?
     
  4. Kevin Sharpe

    Kevin Sharpe Active Member

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    yes :smile:
     
  5. dpeilow

    dpeilow Moderator

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    Does it play properly on an iPad?
     
  6. GSP

    GSP Member

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    I prefer to download the PDF to my iPad, and open it in iBooks. This works great. The pages turn much faster than viewing it on line, and I don't need an Internet connection to read it. If you do view on-line instead, the videos work great on the iPad.

    GSP
     
  7. Todd Burch

    Todd Burch Electron Pilot

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    While errors are not uncommon in articles...notice that they talked about the 300 mi battery being 70kWh?

    I wonder why, several times, they referred to the Model S as a "Near-luxury BEV".
     
  8. vfx

    vfx Well-Known Member

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    #8 vfx, Aug 31, 2011
    Last edited: Aug 31, 2011
    Notes

    The the child seats are "side facing"

    Rear area has 30 cubic feet of capacity.

    .28 CdA

    Tesla bought these:
    Audi A8
    Porsche Panamera
    Mercedes S 550
    BMW525

    Body is like the Audi

    Engineers said that an all-wheel-drive powertrain is being investigated

    Suspension:
    rear has multilink Air assisted rear springs
    front lower control arms

    Steering is electrically assisted rack and pinon
     
  9. zack

    zack Member

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    It looks like on page 10 they suggested the standard range model was 90KWH and the 300 mile range version was 70KWH. Bad editing.
     
  10. TEG

    TEG TMC Moderator

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    #10 TEG, Aug 31, 2011
    Last edited: Aug 31, 2011
    ?! Do any cars do this ?!
    I thought that was not permitted in California.

    California Child Seats - SafeMotorist.com

    CHP - Child Seats

    UK:
    Fitting and using a child's car seat in your vehicle : Directgov - Parents
    Seat belts - Regulations and guidelines for camper vans and motorhomes | Campervan Life
     
  11. Tommy

    Tommy Member

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    #11 Tommy, Aug 31, 2011
    Last edited: Aug 31, 2011
    The definition of "child" is the source of the confusion. Per the bulletin: Effective January 1, 2005, California Law will require children to ride in the back seat in a properly secured child passenger safety restraint until they are at least 6 years old or weigh 60 pounds.

    As I read it, the restriction applies to a child under 6 years of age or under 60 pounds. A passenger over the age/weight restriction would be able to use the rear side facing seats. Practically speaking that leaves the age group between 6-10 able to use these seats. Older than ten and I think a passenger may be to tall to use the rear facing seats comfortable.
     
  12. zack

    zack Member

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    I'm sure they're still rear-facing. There's lots of little bits of misinformation in this piece... on page 14 it says "Switching the e-motor's polarity changes the forward gear to reverse gear." Not exactly. The phase order is swapped.
     
  13. TEG

    TEG TMC Moderator

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    Not so sure:
    Tesla Model S Electric Sedan Breaks Cover - NYTimes.com
    Perhaps we need a whole topic just about side-facing seats. From what I can see, there is a sentiment that side facing seats are less safe than forward facing, regardless if you were thinking of putting a child booster seat in them.
     
  14. clea

    clea Member

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    that article was from 2009 and the current FAQ from Tesla's site (Model S | Frequently Asked Questions | Tesla Motors) states

     
  15. TEG

    TEG TMC Moderator

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    Well, lets just hope that both articles are wrong (perhaps just out of date), and that the seating type has been changed.
     
  16. zack

    zack Member

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    They've always been described as rear-facing to me. Still, getting rear-ended with your kids back there seems pretty scary.
     
  17. Lloyd

    Lloyd Active Member

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    Yes but the NY times article is 2.5 years old! I think we would have heard more about side facing if that were going to occur. The body stampings show depressions for rear facing seats which are much more current.
     
  18. Citizen-T

    Citizen-T Active Member

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    Yea, watch part 2 of the Alpha walk-through. Rawlinson clearly says that children will be rear-facing and even points out where they will sit.

    Tesla Vehicle Engineering | Blog | Tesla Motors
    (Jump to 2:50 to see it.)
     
  19. Hache

    Hache Member

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    #19 Hache, Sep 1, 2011
    Last edited: Sep 1, 2011
    According to MacPherson strut - Wikipedia, the free encyclopedia , it's not a very good design... :confused:

    Details of the front suspension :
    http://www.teslamotorsclub.com/attachment.php?attachmentid=2449
    http://www.teslamotorsclub.com/attachment.php?attachmentid=2450

    EDIT: Seems like it's not that simple, I found other articles with different conclusions (very interesting, read them !):
    Double Wishbone vs. MacPherson Strut I:The Basics - Team Integra Forums - Team Integra
    Double Wishbone vs. MacPherson Strut II: Compared - Team Integra Forums - Team Integra

    To summarize, on the lower control arm suspension (Tesla Model S front suspension) compared to a double wishbone suspension:

    Wikipedia
    + inexpensive
    - harsh quality of right
    - lower handling

    Team-integra forum
    + inexpensive
    + better quality of ride (less vibration)
    + lesser weight => better acceleration
    - lower handling

    Anyway, I'm sure they have good reasons to put lower control arm suspension in the front. It would be nice to know them :smile:
     
  20. GSP

    GSP Member

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    #20 GSP, Sep 1, 2011
    Last edited: Sep 1, 2011
    As I recall, even Porsche uses McPherson struts. For modern cars, the detailed design and tuning is more important than a double wishbone layout. Tesla has some great engineers. Their suspension design will likely be competitive.

    Even more important, for both ride and handling, is body stiffness. According to the SAE article cited, the Model S body in white has a 42Hz torsional frequency. This has to be some kind of record, most automakers are very proud when they get 25-26 Hz. This is a very stiff body. On top of that, the center of gravity will be very low, probably another record. Even the curb weight is only 3800 lb. about the same as a Chevy Malibu. Very impressive for a 160-300 mile EV!

    The Model S will handle like no other car, and it will be a joy to drive.

    GSP
     

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