The essence of wing lift is discussed.
If the wing is a flat (with no thickness) and the attack angle is zero, there is no lift.
If the plate has thickness and zero angle of attack, if only the top of the plate is considered, the plate will generate lift.
Because the direction of the red arrow is angled with the top of the flat plate, t...
In the still atmosphere, can air flow through the wing without pressure difference?
Of course not.
The pressure difference is given by the engine of an aircraft.
At atmospheric pressure, there is a plate (red) moving along the arrow, and the left side of the plate is high pressure. The right side of the plate is low pressure, right? It is assumed that air is an ideal fluid.
Because the fluid has inertia, the left side of the plate must be high pressure, ot...