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I like the way 3-link rear suspensions work. I have read that the best designs for adjustable ride height has all links the same length. This is fine for a race car, or pick-up truck, but does not work with a car which has a back seat.
Has anyone ever seen a 3-link with a dipped upper link that allow for room for a back seat passengers? The attached sketch is exaggerated, but shows the concept.
Besides the added weight, does anyone see a major issue with such a design?
The biggest issue would be the strength of the upper link. It would need to be way overbuilt to keep the link from trying to straighten out under load. Seems to me, if you built as shown, you would get a lot of flex even if it did not have the extreme bends in the drawing.
FWIW - The "ideal" setup is to have all links the same length to keep pinion angle from changing an excessive amount. It is not actually an absolute necessity. Just look at practically any factory triangulated four link. Very few will have the links equal length.
Rear bucket seats maybe.
Thanks for your feedback.