>The higher rear roll center
>would help transfer weight off the inside rear wheel very quickly, and
>thus help rotate the car since.
this is the precise effect i am interested in, since it gives better turn-in
and then steady state is tuned with bars and springs.
>you could just use the
>standard weight transfer equations involving track width, lat accel, and
>CG height.
here is where i get fuzzy. i dont think we can consider the front and rear
systems in isolation since they are coupled by the chassis. or at least, i
dont have a good answer for those that say i cant :)
is there a substantial effect on corner weights caused by the car twisting
under roll due to the inclined axis?
how much of an effect does the rotational inertia of the car play- weight will
be transferred slightly ahead of the deflection of the springs/bars, and i
think this force is applied to the tire sidewalls.
james
nihal@berkeley.edu wrote:
>You will have to know the lateral accelertaions on both axles in order to
>calculate the specific weights on each wheel. This is very difficult
>unless you hada good data acq. system.
>If you had the lateral accels at on both axles you could just use the
>standard weight transfer equations involving track width, lat accel, and
>CG height. From there you can take the ratio of RC height to ground height
>vs. Cg height to RC height on each axle. But since this isn't steady state
>you won't know the affects of your shocks, friction, preload on the actual
>amount of weight being transferred instantly through the RC (or chassis if
>you prefer) vs. your springs, shocks, and sway bars.
>
>At the very first instant when the turn is initiated I would see the
>inclined roll axis having little affect due to the lack of rear lateral
>acceleration, but after say the first .1seconds it would since the rear
>axle would then have lateral acceleration. The higher rear roll center
>would help transfer weight off the inside rear wheel very quickly, and
>thus help rotate the car since.
>
>If this doesn't make sense I'll try and clarify it more.
>
>
>>specifically, im interested in the transient effect on corner weights at
>>the start of a turn.
>>
>>by inclined roll axis i mean the rear and front roll centers are not at
>>the same height.
>>
>>does someone have the math for this handy? i havent been able to reason
>>it qualitatively. thanks,
>>
>>james
>>OSP - Oculating Suspension Permutations
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