[aerohead]

Originally Posted by freebeard

Works for me. It's nice that they give frontal areas.


http://www.miataturbo.net/attachment...ine=1343223372

That external duct over the back window appears to expand the streamline over the roof. Slows it down? Lowers the back pressure?

This 'direct-downforce' Rally-Car spoiler creates
1) ultra-super velocity
2) all pressure recovery is lost
3) base pressure is lowered
4) pressure drag is increased
5) overall drag increases, from Cd 0.297, to Cd 0.36
6) a 63-count increase
7) a 21% drag increase
A really stupid thing to do to a car