Aerodynamics & Diverting Wind Resistance ?

roccodart440 said

And at what "speed" or MPH before it matters ??
And even then, how MUCH does it matter ???

Definitely anything over 100 MPH, and quite a bit. I need to adjust my ET when the wind flags show a headwind.

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precisely... head wind or tail wind moves the ET. It also moves the gas mileage when traveling across the Interstate, especially in a truck or van. And that might be at 65 MPH.