Quote:
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Autoblog Editor Greg Migliore travels to the wind tunnel at Ford Motor Company in Dearborn, Mich. to debunk the myth that driving with your tailgate down is more aerodynamic.
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Modern trucks are being designed with a wide, flat tailgate top ("spoiler") to promote flow reattachment and clean separation at the rear.
But a Ford engineer says even older pickup designs are more efficient with the tailgate up.
A tonneau is better, of course.
I was a little disappointed he didn't point people to EcoModder for examples of aeroshells, which are
best.