That 5% on
that (3/8 scale) body in
that wind tunnel. You'll never know when you reach 0.20 without a wind tunnel. But—aerohead's done it.
Basjoos' Aerocivic has double wall skirts between the front and rear wheels.
I used to think the best replacement for a physical boat tail would be actively blown Coanda nozzles. But the big contender today is
Plasma Actuators.
