Quote:
Originally posted by smdubovsky
The offset WILL result in the centerpoint of the wheel moving in the XYZ axes. This will affect things like scrub and weight transfer as the suspension moves. To further complicate things these happen anyway even w/ 0 offset since the wheel has width and usually has caster & static camber - which will casue the contact patch to move around.
SMD
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When I did my calculations I found the endpoints of the two wishbones as a function of the angle, a, that the lower wishbone has rotated upwards (counterclockwise) from the horizontal. If the lower wishbone in my diagram rotates about the z-axis and the upper wishbone rotates about a line parallel to the z-axis there should be no motion of any point on the wheel (including its center point) in the direction if the z-axis, right? The center point of the wheel should always remain in the x-y plane (have a z coordinate of 0) if it was in the x-y plane for a=0.
Edit: I just found some information
here that says that when a double wishbone suspension moves the spindles "...also have a slight side-to-side motion caused by the arc that the wishbones describe around their pivot points. This side-to-side motion is known as scrub. Unless the links are infinitely long the scrub motion is always present." So does that mean that both wishbones would not rotate about axes parallel to the z-axis?