No matter what the results show, I'm liking this method of experimenting with something large and obvious! I know aero design is as much about optimisation through small details, but there's something satisfying about slapping on a big sheet of cardboard and seeing if drag is affected. It would be great to see the effects on CFD or smoke trails in a wind tunnel.
As for the 14.5mpg Pinto, maybe the journalists hobbled their car before the test thus making it easier to improve?
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Anthony
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