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Latest plan.
Frame of doors ~54"L & 48" behind the bumper.
Doors are covered by 72" polycarbonate twin wall, leaving 18" of twin wall sticking ~ 64" behind the bumper.
My research shows this rear overhang is out of compliance in only 5 states.
The images show an additional 48" sheet of twin wall bolted on as an extension to 96"L.
You can see why the angle is important at this length. 17 deg gets the aperture @ 96"L down to just 26".
To maintain attached flow I may use two layers of vortex generators: One in front of the cuff and a second in front of the hinge.
If I cannot maintain attached flow at 14 deg I will settle for 11.
SCIENCE!
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