Interesting paper on historic car aero

[aerohead]

Originally Posted by JulianEdgar

Probably. But I bet he won't mention this:

At 15° yaw, the aerodynamic characteristics are less than ideal with a high front lift and a yawing moment which is 32% higher than would be considered acceptable for a European passenger car of today.

Those are smattered throughout Hucho's 2nd-Edition.
We'll have an entire thread devoted to this topic at some point. I've compiled data since 1974.