[hat_man]

I thought thrust angle was the angle perpendicular to the rear axle? I still agree that .17 is not enough to worry about. Now I'm just trying to learn.

If the thrust angle is the angle perpendicular to the rear axle, then the only way to change it is to move one wheel forward, causing the opposite wheel to move rearwards. This would cause the vehicle to want to travel "crooked" and have to be corrected by turning the steering wheels "counter thrust" to compensate.

I thought "crab walking" was when the rear wheels were offset to the front wheels but still tracking in the same angle. Theoretically both at 0° but one axle being more outboard of the other.