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Old 07-15-2016, 10:53 PM   #51 (permalink)
skyking
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Location: Tacoma WA
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Woody - '96 Dodge Ram 2500 SLT
Team Cummins
90 day: 23.82 mpg (US)

Avion and Woody - '96 Dodge/Avion Ram 2500/5th wheel combo
90 day: 15.1 mpg (US)

TD eye eye eye - '03 Volkswagen Beetle GLS
90 day: 49.05 mpg (US)

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That third graph is what I was worried about Phil. It plots the height, not the angle and shows an increase as the height goes above a small value.
Opposite over Adjacent = 7/96 =.072916
angle is 4.17 degrees.
The ground clearance is 12", and yes it would have radiused corners.
If this long rising diffuser helps, I'd make a 4 sided boat tail instead of the simple two sides, two rounded corners, and top.

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2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle

currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears

Last edited by skyking; 07-15-2016 at 11:00 PM..
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