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Sorry to waste anyone's time here, what is lacking here specifically?
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No problem. Some of the best threads result from a one-post-hit-and-run poster.
The context provided in Permalink #9
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My concern and focus was geared more towards typical RV two axle, large relatively rear overhang applications with "average" drivers in cross wind situations.
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The discussion of rudders and semi trailer tails was from lack of context. A two-axle RV with large overhang could range from a Toyota class C motorhome to a Prevost.
aerohead likes numbers. Wheelbase? Overhang? Width? Height? ....for starters. Aeroforms are a totality. What happens in front can affect the rear --the classic example is a Porsche 911; if you add a spoiler at the back it has to be balanced be an airdam in front.
Pictures help.
Bench racing? Have you seen this:
IIRC 123MPH, or so. Good front pressure gradient, lots of length for reattachment, I forget about the rear difusser, but they had another car on the salt.
