If you saw what at what an "off-road" buggy rc track looks like it would make more sense.So, if it's rwd, a wing usually works in conjunction with the front of the car, as no downforce on the front and there will be no steering, on a rough surface, it would see that this would complicate shock performance significantly, as I can't think of many off-road applications where they run wings for downforce. And while you might find some outilers with various spoilers or wings, I would think they are more about just cosmetic flair than functional purpose. Maybe on a very clean and prepped hard surface for RC road racing, but I'd think the front aero would have to be part of it. There's also a speed you have to go to make a wing effective, I'm not sure it scales down, as in if you are actually producing downforce with such a small airfoil. I'd have to go back into my textbooks to see (scale effects).
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