Quote:
Originally Posted by JacobLeSann
The box cavity on the Nissan pickup and the van in #55 seems like the sides wouldn’t do much. To me, I’d think air would rush off the side edges before it gets to the sidewalls of the cavity.
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If you click on some of the links provided including a link to a semi-truck patent with stepped box cavity you will start to understand this as not so much about attached air flow or even reattached air flow but of tempering re-pressurization after a moving body passes through the air. Call it "
filling the hole" if you will.
Quote:
Originally Posted by kach22i
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Several recent treads on this have explained it better than I can despite the personality disputes that colored them.
Do your cardboard and masking/duct tape mock-up, bet you will want those box cavity sides for structural stability.
I would do the bottom of the box cavity only after full belly pan and actually call it a rear diffuser at that point of the game.
If anyone finds a good CFD gif showing how a box cavity works it may do more for intuitive understanding than reading 30 pages of arguments.
I'll see what I can find, but now that you know what Google search terms to use you can feed yourself information to the point of overload.
EDIT: An LED brake light strip all along the ends would look cool and maybe keep people from walking into it in a parking lot.
Stupid people knocked off the mirrors on my S-10 by walking into them.