[aerohead]

Originally Posted by NeilBlanchard

Does the coefficient of drag (Cd) take surface drag into account, or just shape drag?

And the other major issue with these shapes of "cars" is they are incredibly prone to drag with crosswinds; and they often have to have all wheel steering, so it can "yaw" to face into the wind while driving on a different vector.

Cd will embody:
*pressure drag
*surface friction drag
*internal flow drag
*interference drag
*induced drag