Quote:
Originally Posted by stevey_frac
So, basically, a panel that would extend from the from the rear axle gently upward? Wouldn't such a panel end in the middle of nowhere? (i don't think it would come up to be anywhere near the back bumper... Could I end such a panel abruptly before i got as far back as the bumper and still get gains? I really don't want to do a full boat tail. Thanks for you time. I appreciate you taking a look for me.
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Steve,the idea is to extend the perimeter of the rear bumper,back and sides, straight down,to where it intersects the 2.5-degree angled line advancing up and to the rear from the bottom of the rear axle.That whole region would be enclosed to form the diffuser section of a bellypan and rear valance and dictate to the air,where you're going to allow it to go.In this case,this would be where the big-boys with the billion-dollar windtunnels tell us to make it go.If the panel rises at a steeper angle than 2.5-degrees,the flow will immediately break away,leaving you with just as high of drag as before you began.It's a rule of aerodynamics that cannot be broken.