Side of the wheel, and it should be matching the road with what curve in order to ensure that the axis in a horizontal plane movement?
Ideal state is feasible, or bound to bumps! The reason for the bumps is that the axle can not always be orthogonal to the center line of the road!
Find a round, inside a square, the square deducted, the rest of the place to pull the tiled on the road can be.
Students to the answer: to find a large rubber mud, a square wheel, with external control of the axle in a plane, so that the wheels in the rubber mud on a circle to know the ...
