Quote:
Originally Posted by oldtamiyaphile
Your analogy is false because the GT-R uses it's floor/diffuser to create most of it's downforce which is basically 'drag free', and why underbody downforce is always so heavily policed in racing.
A diffuser's typical lift to drag is 10:1 and can even reduce drag while still generating modest downforce
Compared to a rear wing's typical 3:1. Front wings on open wheel cars can be as low as 10:1, but that's because they're basically front mounted diffusers.
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Sorry, wrong. All
down force is derived from
forward motion, and thus (just as the illustraction geometrically illustrates) vectorally adds to the total forward drag...ie: the LONG side of a 3-4-5 right triangle.