By winglets, I assume you are referring to the up turned wing tips that reduce vortice drag?
I actually need a fairly large vortice to fill the gap between the side skirt and the road (75-80mm)
I figured that with a small wing ending with no endplate, I could angle it down so the tip ends...
I have a sedan based car that I am designing an underfloor for aero setup for. The car is used for Hillclimbs and Sprints so the rules are fairly open.
I was starting the floor with a front splitter. The top of the splitter will be at 0 degrees AOA and the under-splitter surface will taper down...
