Quote:
Originally Posted by Phase
So you’re saying angle the spoiler slightly down versus straight out and to continue the aero template shape?
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Yes. You'd basically just elongate the upper profile along the path shown, which IS at a downward angle / curvature.
The fact that, so many of the current lowest-drag bodies incorporate this contour, lends credence to the science from which it originates.
As a 'first-approximation' for a 'solution' to lower drag, I've seen nothing published since 1974 which could exceed the probability for success.
The 'form' is essentially 'pre-tested.' 'Pre-measured.'
The kinds of pressures and velocities associated with drag reduction that you might measure for, are already incorporated within the 'shape.' It works.
The sides of the car would follow an elongated path, no more aggressive than that of the upper surface.
Diffusers are harder to call, as, with the exception of the VW XL1, there are very few detailed views for vehicle underbodies, which would define what's underneath, and how we'd improve it.