Woah! That's awesome!
It would be a wonderful thing if there was an inexpensive tool available to do aerodynamic analysis, that folks like us ecomodders could use? I'm working on a 3D CAD model of the 1937 Schlör "Pillbug", and I hope to come up with an variation that narrows the width, by keeping the enclosed front wheels but doing this with a pivoting (unsprung) housing.
I think this is another occasion to mention the
idea of open source design and information.
BTW, Benjamin -- you can only see the photos after logging in...