Quote:
Originally Posted by gafhj
Can you clarify, 26% reduction was for such simplified body?
Less than I'd expect.
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Yes,the drag reduction is for this simple wind tunnel model,which we know little about.
From what we know from public domain literature,the boat tail they tested could be improved substantially,aerodynamically.
*edge radii can be improved
*morphing into a more elliptical cross-section would honor Morelli's research
*their diffuser section is completely wrong,aerodynamically,however,probably a 'practical' concession to SAE departure clearances
With an 'active' diffuser,the angles could be maintained at the drag minimum 2.5-degrees to 4-degrees depending on 'long' or 'short'.
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If 26% translated to the actual vehicle,this would yield around Cd 0.28,which is pretty good for a full-size SUV.
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With 'corrections', we might expect to see 26+%.