The shapes of the upper and lower sides of the wings of an airplane are different. The upper side is more convex, while the lower side is flatter. When an airplane is taxiing, the wings move in the air. From a relative motion perspective, the air flows along the wings. Since the shapes of the upper and lower sides of the wing are different, in the same time, the air on the upper side of the wing flows longer than the air on the lower side (the curve is longer than the straight line), that is, the air flow on the upper side of the wing has to be faster than the air below. According to the principle of flow mechanics, when the aircraft slides, the air pressure on the upper side of the wing is less than the lower side, which causes the aircraft to generate an upward lift. When the aircraft taxis to a certain speed, this lift reaches enough force to make the aircraft fly. So, the plane took off. To put it more intuitively: the data on the upper surface are all assumed to be 1, and the data on the lower surface are all assumed to be 2.
Then: the length of the upper surface of the wing is s1, and the length of the lower surface is s2. The time for the upper surface and the lower surface to move in the air is fixed, set to t, t1=t2, from which we can get: v1= s1/t1 v2=s2/t2 s1>s2 t1=t2, so: v1>v2, according to Panullis theorem - "The pressure produced by a fluid on the surrounding material is inversely proportional to the relative velocity of the fluid.", so the upper surface The pressure f1 exerted by the air on the wing is less than f2 on the lower surface. The combined force of f1 and f2 must be upward, which creates lift.
The Wright brothers are so awesome.
