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Old 03-26-2011, 04:09 PM   #12 (permalink)
aerohead
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spoiler

I can only recommend using the Aerodynamic Streamlining Template as a design tool for the spoiler.
The pure cantilever wing might create a safety hazard for pedestrians walking by the car.Ouch!!!!!!!!!!!!
If you went ahead and did a short tail( 12-inches ),extended the c-pillars on out along the Template line,then filled in between with your original horizontal wing plus one high ( as a wing/shade )and one mid-wing (also straight back from the glass) you'd be looking at a 4-mpg gain.
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