(Modified from original illustration in the Millikens' "Race Car Vehicle Dynamics")
This might be the
best of the asymmetric 3link arrangements presented here. I came up with the idea while considering the possible modifications
that could be made to the 2005 Mustang 3link. My goal was to avoid the packaging problems which arise with an offset upper
link. What I have is a design which could easily have been adapted to the Mustang. It provides equal rear tire loading on
launch and no squat or rise. In addition, link loading is more equally distributed than with a severe upper link offset.
It is assumed that there is a single upper link and two lower links, with the rear mounting points being directly above
and below the axle centerline. To minimize roll steer effects, the instant center is placed on the no squat/no rise line at
the height of the tire radius.
Looking down on the car from above, the single upper link and the lower right link are both rotated clockwise from their
rear mounting point. The tangents of the two angles are part of the spreadsheet output. Also included in the output are the
tangents for the link angles as viewed from the side, with a positive tangent relating to an angle where the front of the
link is higher than the rear.
With the links at the described angles, equal and opposite lateral force components create a couple which exactly cancels
the driveshaft torque.
