Quote:
Originally Posted by capnbass91
I've seen two kinds of these spoilers.....
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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.