Wow.
The "Thomas Walter Tech Post of the week" goes to you, Chris. Cool.
Now, my feeble attempt to interpret this set of graphs! The roadster
has some, but not very much, bump steer, and when it does bump steer,
it toes in. There's little suspension 'give' (it tends to come back up
the way it went down?)
Castor changes significantly with suspension travel, but in such a way
that will save most of our butts, i.e. as you brake and turn, pushing
the nose down, you get more "push" back from the steering wheel. Our
springs are linear, but the bump stops are not! Bob Sharp is right once
again...
A question: why "Wheel displacement from curb" Is that 'curb height?"
Again, if I wore a hat, it'd be off to you!
Toby
Christopher Coker wrote:
>
> About a week or so ago there was a thread on the Roadster's front suspension
> geometry. I measured my Roadster's front suspension Toe, Camber, and Wheel
> rate curves on my employer's test rig. For 'training' purposes of course.
> :)
>
> I've put three files up on my web site. Not the best scans in the world,
> but you'll get the idea.
>
> At the time these measurements were made, the front end had just been
> completely rebuilt with new bushings and ball joints all around, but had not
> yet been aligned. Hence the static camber settings were a little off.
>
> We typically make these types of measurements on prototypes for Ford, GM,
> Daimler-Chrysler, etc. Folks around the office were impressed with the
> roadsters suspension, considering the age of the vehicle (and of the design
> as well).
>
> The link names should be self explanatory.
>
> http://www.flash.net/~ccoker/Toe.gif
> http://www.flash.net/~ccoker/Rate.gif
> http://www.flash.net/~ccoker/Camber.gif
>
> Regards,
>
> --
> Chris Coker
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