[aerohead]

When I posted this originally,I forgot an important tidbit.In most fluid books of my day,the example of E.Moeller's work on the nose of the 1951 Volkswagen Van was always cited.The Volkswagen began quite literally as a "brick-on-wheels" with a drag coefficient of 0.76.With some clay,Moeller sculpted the front of the Volkswagen with generous radii,and the Cd dropped to 0.42.With the exception of the HUMVEE,there are no current production vehicles that possess square leading edges.Today,the example of the VW serves to demonstrate the significance that a little softening of leading edges has meant in the meantime.