Quote:
While the half tonneau should save you an mpg, you might think about putting together a plywood aero cap
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What I found interesting on the chart you posted was the 'wing + cover':
It is 3/4ths as effective as the aero shell and gives a lot more access to the bed. The results for a partial cover with and without the wing suggests that the air moving past the sides of the cab has a lot of effect. Are there any examples of a Bonneville style spoiler on the back of a pickup truck cab?
Or maybe we should ignore the chart because it shows the partial cover as less effective than the full cover. And does 'basic redesign' mean anything?