Thanks Phil !
Aerodynamics really seems to be a 'black art' as I have seen you describe it in the past.
It's as if the air does whatever it wants to. ( I think i've expressed that same reaction in previous threads ! )
What baffles me is that a low drag car versus a high drag car can be only millimeters apart in their sheetmetal, yet the air will cling to one and not the other.
I was under the assumption that wake size was the main factor in a low Cd.
How can this be, if for example the MX-3 has an overall smaller wake than something like a Scion Xb, yet both have the same Cd of point 32 ? ( I have included a tiny thumbnail image because this thread is getting image heavy )
