Quote:
Originally Posted by freebeard
- A modern car underbody is a plenum [considered with the road surface] that mangles, or sorts and orders, the airflow from the front and sides out the rear.
- 1940s peep mirrors and newer buses and firetrucks with forward-reaching stalks.
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Yes. The Cybertruck forebody extends to the cut line between the two doors and roof apex, and this entire region is within a very favorable pressure gradient for the boundary layer, with all the flow moving towards a pressure minimum at the cut line / roof apex maximum cross-section.
There should be separation just behind the chamfers, then almost immediate reattachment beyond the locked-vortices traveling with the truck.
Same for the roof apex and 'skid-plate' area.