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Originally Posted by DieselHybrid
1. Installed Vortekz vortex generators to reduce pressure drag. As per tuft testing, these have cleaned-up the flow a bit.
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Of course, tufts streaming aft as a result of VG's doesn't
necessarily equate to reduced drag. The VGs induce drag themselves in order to affect the flow.
Quote:
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Surprisingly, many of the underbody panels are dimpled (think oversized golfball)- which encourages early transition to a turbulent boundary layer.
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The boundary layer by that point is more than likely already turbulent. The dimples are probably there for structural rigidity in a flat panel that may otherwise have a tendency to oil can. (Besides, there's no need to encourage a turbulent boundary layer unless you're trying to delay separation
on a curve.)
Sorry for jumping on these points! Pet peeves of mine.
And congrats on an efficient new ride!