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[Nathan]

OK, colder air means more dense air. Hotter air the opposite. Air tempurature deeply effects power output. But how does air density effect aerodynamics? Does a hotter and less dense air tempuarture create less drag? If so I imagine it would be almost unmeasurable, but is this possible??? Is a car more aerodynamically efficent in a warmer enviroment versus a cooler one?

[J]

...So, the lift to drag ratio will stay the same.

J