Found this by accident today. Is this an EcoModder's work? Did I miss a thread?
Note the mini wheel skirts on the back wheels too.
Quote:
Sloped truck topper is intended to reduce the aerodynamic drag on a pickup truck as compared to an uncovered bed. If achieved, the results are likely to be improved fuel economy during highway travel, lower wind noise, and higher top speed. Angle of declination is ~8 degrees, and flow appears to be attached, yet turbulent. Construction is corrugated plastic on a 2x2 treated lumber frame. Secured to bed by 4 nylon tie-downs with 330 lb working load, with 1000lb break rating.
Fuel economy:
EPA Rating: 22mpg highway
Current Actual: ~25mpg highway
Desired: 30mpg
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