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Streamline Flow

How do an air...

Question

How do an airplane's wings provide lift up?

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Solution

The shape of an airplane's wings is what makes it possible for the airplane to fly. Airplanes' wings are curved on top and flatter on the bottom. That shape makes air flow over the top faster than under the bottom. As a result, less air pressure is on top of the wing. This lower pressure makes the wing, and the airplane it's attached to, move up

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Similar questions

Q. In an experiment on model airplane in a wind tunnel, flow speed on upper & lower surfaces of the wing are

70 m / s

60 m / s

respectively. Find lift on the wing, if area of wing is

4.0 m^{2}

and density of air,

ρ_{a i r} = 1.2 k g / m^{3}

.

Q. Air streams horizontally past an airplane. The speed of air over the top surface of the wings is

60 m/s

and that under the bottom surface is

45 m/s

. The density of air is

1.293 {kg/m}^{3}

. Then, the difference in pressure between the top and bottom surface of the wings is:
(Consider airplane to be flying at a constant altitude)

Q. Air streams horizontally past an airplane. The speed of air over the top surface of the wings is

60 m/s

and that under the bottom surface is

45 m/s

. The density of air is

1.293 {kg/m}^{3}

. Then, the difference in pressure between the top and bottom surface of the wings is:
(Consider airplane to be flying at a constant altitude)

Q. The lift of an airplane is based on

The velocity of air over the upper surface of the wing of an airplane is

40 m / s

and that on the lower surface is

30 m / s

. If the area of the wing is

5 m^{2}

and the mass of the wing is

300 k g

, the net force acting on the wing is (Density of air

= 1.3 k g / m^{3}

g = 10 m / s^{2}

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