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    Body flex

    Hi guys,

    Great site! This is my first post. I remember reading a review of the upcoming SLR and it mentioned that the SLR's body is 4 times as rigid as the current SL. That got me to wondering about the body rigidity? of 996 TT as compared with other sports car. Is there a standardized measurement of body flex and how does the 996 TT compare, say with a 360 or an E55?

    Any thoughts would be much appreciated.

    Motronic
    '02 SY TT

    Re: Body flex

    I think the E55 is a bit outclassed by the competition in this contest

    Re: Body flex

    Good question Motronic. This is my hypothesis, since Mercedes is comparing rigidity to the SL, another Mercedes which I think may share the same frame and/or chassis as the SLR. Because they are comparing "apples to apples" they can produce a well-grounded value.

    As far as comparing body rigidity between say, a 996TT and a F360.. I don't know how this would be possible, they are completley different cars in every aspect. It would be an "apples to oranges" comparison.

    Regards,
    Mike

    Re: Body flex

    So does such a thing as a "body stiffness" rating exist for all production cars, for comparison purposes?

    Also, in general, which body style is the most favorable for structural rigidity? i.e. Coupe vs. Sedan vs. roadster(obviously difficult in this area) vs. hatch back etc.

    Motronic
    '02 SY TT

    How they test chassis stiffness

    Chassis stiffness is measured by all manufacturers, and
    there is some consistency in how they measure it, though
    they don't produce such data in a standardized way for
    consumers.
    Essentially they suspend the car (without the wheels or
    suspension components) in a frame that attaches rigidly at
    three points, probably at the suspension component
    mounting points at three of the four corners. Then they
    measure the natual frequency of oscillation of the chassis,
    measured at the one free corner of the chassis. The higher
    the frequency, the stiffer the chassis.
    Joe

     
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