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Thank you for the input and the link.
However, if you re-read the information at that link carefully, you'll note that camber is what causes the car to want to change directions when the wheels are pointed forward (i.e., a perceptible 'pull' that originates at the tire).
Caster is what causes the tires to tend to return to a straight line when you let go of the steering wheel.
The link's discussion on caster is worded a bit poorly in one spot, so it is easy to mis-interpret what it says.
You can see the effects of camber and caster in a simpler system if you look at bicycles and motorcycles. Bikes with a lot of caster (rake) are cruisers that tend to want to return to a straight-ahead path on their own. You have to work to make them turn at speed. Trick bikes have very little rake (forks are vertical). They are very easy to turn, and very unstable at speed.
Similarly, anyone who has played with a bicycle or any other rolling disk knows what happens when it is leaned one way or the other (camber). It wants to go in the direction it is leaned. Try tightening the axle bolt on the front wheel of a bicycle with the wheel slightly out of vertical. Then ride it. It will pull in the direction that the wheel is leaning, and you'll have to compensate by pulling the handlebar.
I don't know too much about cars, but I know quite a bit about physics, which I tend to share with anyone who will listen to me!
Thanks again for your input.
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