Big_Dave:
Thanks for the detailed response. One of my original primary concerns was how the wheel base decreases as the vehicle turns, probably resulting in poor vertical stability. I thought about your other concern already about it wanting to be uncontrollable. My solution to this is have the pivot point ahead of the wheel so it is self centering.
The quick and dirty sketch below illustrates the same thing, only with the rear wheel pivoting instead. The initial drawings from the beginning of the thread also had their pivot point ahead of the front wheels (actually the pivot point was about 2-3" in front of the car, the steering system was going to require an arclike track to accommodate for that).
With the sketch below what do you think about how the car would handle (ignore issues of going in reverse, reverse would only be at low speeds and this setup would have some sort of power steering)?
