Quote:
Originally Posted by aerohead
No spoiler is capable of the drag reduction you're entertaining. Only box-cavities and boat-tails can do it.
Remember, your design specification is 60mpg @ 80-mph. And Cd 0.12, half that of Prius, Ioniq.
If it was that easy, they'd already be doing it, and you'd have your 60 / 80 ratio.
The car must be reduced to surface friction drag and wheel drag.
Surface friction we can't do anything about, but wheel drag can be cut by 70% according to Goro Tamai of MIT.
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hence the box cavity idea. cd of 0.12 probably isn't possible. but even if i could reduce the ioniqs drag down to 20 i would be happy honestly