Quote:
Originally Posted by kach22i
The first one on the white car redirects the boundary air current down so it stays attached to the rear window.
The second one on the gray car provides a clean edge for the departing air, and launches it slightly down and out. I should note that there is no hope of the trunk wing on the gray doing much of anything.
I think they both create uplift, but in my opinion most drag saving devices and forms do, just as most down-force created devices and forms cause more drag. If someone can prove me wrong with those statements, I welcome the learning experience.
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I just posted my research on the current malibu. Imo Anything on the roof of a sedan or coupe is bad or useless at best. Vortex generators help very slightly for the malibu.
I found that a nascar type spoiler significantly reduced drag AND lift. Im currently optimizing size and shape for my car. Hth