Separating ride from roll...?

[cornfedbill]

Ray,

I did some sketching of the Mumford link suspension. If I am not mistaken, mounting the pivots to the frame, as in your photos, causes the roll center to move towards the outside tire under roll. Isn't it more desirable for the roll center to move inboard during roll?

If the pivots were located on the axle (not desirable for unsprung weight) the roll center could be made to move inboard on a corner and thus cause the body of the car to begin rolling downward, reducing the center of gravity (slightly) and making the car more stable.

We did this on a student design project years ago. It was for the SAE Mini-Baja. The front and rear roll centers were very low and moved inboard significantly during roll (which was much more than a street car). The body would actually begin to squat under hard cornering. It was nearly impossible to roll even with the relatively high roll center and modest track width.

What do you think?