In article ,
Don Pearce wrote:
Yes. However, that kind of perfection is not required for a
longitudinal leaf springs with a live axle done right rear suspension
to be effective.

They do loose traction on rough roads, badly.

In the late 60s and early 70s, Ford Escorts with precisely that setup
were unbeatable in rallying. All they added for the rally cars was a
second parallel longitudinal link, and a Watts linkage for transverse
location.

But that was a long time ago, when no comparable RWD car had decent IRS
anyway. But what works well for sport isn't necessarily best for road work.

--
*Always borrow money from pessimists - they don't expect it back *

Dave Plowman London SW
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