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Old 09-29-2020, 04:47 PM   #7 (permalink)
JulianEdgar
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Here's two diagrams from the paper. Notchback with and without small rear spoiler ("kick-up").



Note that with spoiler there is a:

- major pressure increase on boot / trunk lid
- major reduction in suction peak due to clean separation
- small reduction in drag and larger reduction in rear lift

In one sense none of this is startling - the pressures are what you can measure yourself on cars that have attached flow on the trunk / boot. But at the same time it's good to see such clear evidence of the changes possible.
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