Quote:
Originally Posted by MetroMPG
The template should be sized (apparently) so your tires share the same ground plane as the aero car in the drawing.
(I'm not sure it's strictly correct for very large vehicles, but that's another discussion.)
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That makes no sense. If he lifted his truck 1 ft, would that then mean the whole template has to be scaled?
No, the curve along the top matters for keeping flow attached, it has nothing to do with the ground.