[winkosmosis]

What do you mean "no low drag car has a simple inclined windshield"? The Prius has a 20 degree windshield.

Or are you talking about flat vs curved? No one has even mentioned flat windshields.

The more sloped windshield doesn't increase drag.... Those supercars have shallow windshields just like the Prius, because they reduce drag. They aren't building their cars with anti-aero principles. They're designing them to be as aerodynamic as possible, with as little lift as possible, or even downforce. And designing for downforce doesn't mean you suddenly don't care about reducing drag.

Indycars and F1 cars have high coefficients of drag because of their downforce surfaces, but the other surfaces are as aerodynamic as possible. An airplane has a low coefficient of drag when the wings are parallel to airflow, but in the real world they generate lift by flying at an angle, which means their drag is pretty high. Yet airplanes generally have fuselages designed to be as aerodynamic as possible.

By pressurized air I mean air that is at higher pressure than the surrounding atmosphere.

Edit: The article specifically states that you can reduce drag by adding arch and frontal area. This is common sense, like I said in the other thread. If you decrease Cd by 10% and frontal area only goes up by 5%, voila you decreased drag.