Aeroplane wings have a special shape. They are curved on top and straight on the bottom. This shape is what helps lift the plane up.
When the plane starts to move, the wings cut through the air. The air moves over the curved top of the wing and under the straight bottom. The air moving over each wing pushes down on it. And the air moving under each wing pushes up.
Since the curved top of the wing is longer than the straight bottom, air moving above the wing travels further than air moving below it. So air going above the wing moves faster. The faster it moves, the less it pushes. As the push over the wing gets weaker, the stronger push under the wing begins to lift the plane. So the plane leaves the ground. As long as the plane keeps moving forward, the wings lift it and help it to fly.
Different wing shapes help aeroplanes fly in different ways. Planes that fly at both low speeds and high speeds have wings that stick straight out from the body of the plane. Wings that sweep backward – like the wings of the Stealth plane – help a plane to fly better at very high speeds.
Picture Credit : Google
