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Gap Fill between cab and aerocap.
I have read alot of discussion here and in other threads about the importance of filling or covering the gap between the cab of a pickup and the aerocap.
In the wind tunnel testing of my Aerolid, I was told by the Engineers, at the American pickup truck manufacturer whose wind tunnel I was in, that the air flowing around the top and sides of the cab never gets sucked into the gap between the cab and a camper shell/aerocap. This is due to there being higher pressure air being forced out the gap from underneath the truck, so the air actually travels backward from what one would intuitively think.
The smoke tests showed this to be true also.
Bondo
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