# Aerodynamics equation

I still need to find an equation for the following restated problem: Suppose a full-size glider passes 10 feet over my head at high speed. No doubt I will feel the downward air pressure caused by the angle of attack of the undersides of the wings. But if the same glider flies over me at a distance of one mile, I will not feel any effect at all. So obviously there is a diminishing strength of the downward air pressure that eventually lessens to a point where I cannot physically detect it. Therefore, is there an equation that, with all relevant criteria being inputted, such as air temp, air density, wing speed, wing characteristics, wing angle of attack, etc., can allow me to at least approximate how far I must be below a passing wing to be unable to detect its downward pressure wave?

• Your question seems to be related to the recent question "Over how large an area does an airplane in flight increase the pressure on the ground underneath it?" ( physics.stackexchange.com/questions/402033/… ) Never got a clear answer on it, though.
– user93237
May 21, 2018 at 20:07