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Chassis: Getting more than you bargained for

Discussion in 'Model S: Driving Dynamics' started by lolachampcar, Feb 21, 2013.

  1. lolachampcar

    lolachampcar Active Member

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    I have an issue with the rear camber on my MS and have begun working on a fix (another thread). In the process of understanding the rear suspension and coming up with a fix, I've come to appreciate the mechanical elements of the car. The rear suspension is a modified version of the BMW 7 series while the front seems to have been inspired by MB. All this is well and good and there is nothing wrong with picking the best of all worlds to inspire your design.

    What strikes me as being different is that everything is bigger, thicker and stronger than it needs to be. Sure, it is a 4700lb ish car but the half shafts are the size of the ones from my Chevy Spice (600+ ft-lbs of torque from a 790 hp motor).

    Now if I were going to start a car company, I'd hire guys that had done each aspect before along with a head of engineering that had been there and done that. I would then make it perfectly clear that we only had one chance. If we screw up MS, everyone goes home. Now, if I were the head of engineering and got that message, I would design the car with an eye towards cost but both my hands firmly gripped on the throat of reliability. I'd make it just a little stronger and just a little better than needed to do the job. If successful, there will be many years ahead to engineer out cost (and reliability). I think this is exactly what happened with MS.

    If I am right with the above, we may very well have a real gem in MS. I think of that MB E Class from many years back that was THE chassis of choice for European taxis. The thing would just go and go and go. I suspect the MS is the same and, if you add the electric drive element to the equation, we may have a three or four hundred thousand mile chassis on our hands. Now would that not be a nice bonus for buying the first cars from a start up auto manufacturer?

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  2. ckessel

    ckessel Active Member

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  3. gray

    gray Member

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    Technically, the Roadsters were the first cars, but those rode on a Lotus chassis.
     
  4. lolachampcar

    lolachampcar Active Member

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    Are there any BMW experts out there? I ask because a recent picture of a torn off M5 rear corner looks an lot like the rear of MS.

    - - - Updated - - -
    This is a 2011 M5 rear suspension
    Lower a-arm with outboard ball joint and inboard rubber bushings (orange)
    Upper toe link with rubber bushings (grey)
    Upper camber link with rubber bushings (blue)
    Torque link with rubber bushings (pink)
    ...... very similar
     

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