I'd posted that for the difusser, but for the spoiler go to the five pages here: ecomodder.com/forum/showthread.php/flat-bonneville-type-spoiler. It provides a surface for any vortexes to reattach to.
Beyond that IIRC someone said the side plates are what they are because the rules dictate a maximum length and height. They just maxed it out and rounded the corners.
A Studebaker
Rooftop fences and the skegs appear to flare somewhat (maybe not).
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Because much of what is in the published literature is nonsense,
and much of what isn’t nonsense is not in the scientific literature.
-- Sabine Hossenfelder
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