How did aeroplane fly in the sky ?

Answer 1

The secret of an airplane's ability to fly lies in the shape of the wings. The cross section of the wing is called an airfoil section. This shape is such that when air flows over it, the velocity of air on the upper side more than the velocity of air on the lower side.

Bernoulli's theorem states (in simple terms) that when air flowsover a body, its pressure is more if the velocity is less, and pressure is less if the velocity is more.

This means that when air flows over the wings of an airplane, the air pressure on the upper side of the wing is less than the pressure on the lower side. In short, there is a net upward force. This is called lift. Since it acts vertically upward, it tends to counteract the weight of the airplane.

When an airplane starts moving on the runway (under the action of its engines - Newton's third law), the air flowsover the wings and lift is generated. As the airplane picks up speed, the lift goes on increasing, till a point is reached wher it balances the weight of the airplane. At this point, the airplane becomes airborne and starts flying.

There are control surfaces called flaps on the trailing edge of the wing. During take off, the flaps are lowered, so that the lift generated is more. This causes the airplane to take off at relatively lower speeds. Once the airplane has reached sufficient height, the flaps are retracted, so that the air resistance on the wings (called drag) is reduced, and the airplane can move faster.

Answer 2

The effect of the air flow over the curved surface on top of the wing causes the air flow to travel faster (higher velocity) than that below the flatter underside of the wing.

Bernouille's principle states that 'Velocity increase = Pressure decrease'.

The pressure over the wing is therefore less than that under the wing. The pressure difference is not large but, the total force exerted on the huge area of the underside of the wing provides the energy to lift the plane.

The faster the plane goes, the lower the pressure above the wing and the more lift.

I think that the control surfaces (ailerons etc), on the wing, govern the height of the plane.

Answer 3

the wings of the aeroplane are slightly bent so when the aeroplane runs on the runway the speed of air is very high which is then sent to below of wings as they r slighty bent then the pressure above the wing is decreased the pressure down the wings is more that's why this pressure difference help the plane to fly in the air.

Answer 4

Hi Shiva Kumar,
As per the flid dynamics & Bernouli' principal
when a fluid is to devide at a point and the two strams tend to meet again . If they had to cover differnt path lengths that part of the stream that has to travel greater length travels at a greater speed to meet the other stream. This differnece is speeds would create a flight effect.Typically aeroplane's wings are designed in such a way that the air stream that encounters the wings when certain point is reached gives it a floting effect(i.e takeoff)
with regards
G. Srinivas

Answer 5

its based on bernoullis theorem. when the plane engine thrust it forwards ,the air moves through the wings with different velocity ,the curved wing blades makes it possible .the air moves with high velocity on the upperside of the wing,create a low pressure zone and the vice versa will happen on the lower side of the wing. so the high pressure on the lower side lifts the plane up against the gravity and the thrust produced by the engine moves the plane forward in the sky

Answer 6

The wings of the aeroplane is specially designed so that the pressure at the upper side is higher compared to the lower side .Hence as it moves forward there will be an upward force known as lift force

Answer 7

the forward motion of the airoplane causes the air to lift and hold the plane in that hight . the wings are shaped to cause this air to do its job .This is why when a plane has engine trouble they quite often crash.

Answer 8

lift drag thrust and the weight of the air supports the plane

Answer 9

it's all about the foil!
When a winged surface is larger on the top than the bottom it creates lift!~

Answer 10

Have you heard of Bernoulli's principle?