How does Boeing 747 take off?

Answer 1

Before takeoff, the pilot lowers the wing flaps to provide lift, which helps the plane get off the ground. He or she then pushes the engine thrust up to about 80%, and the plane begins to move forward. It rapidly speeds up, and soon is going extremely fast; air starts moving very rapidly around the wing. Because the top of the wing is curved and the bottom is flat, air moves faster above the wing and slower below. As a result, the air pressure below the wing is high, while it is low above the wing. Because things always move from areas of high pressure to high, the wing moves upward. Basically, once the 747 gets up to speed, the wings move upward and the plane is pulled upward off the ground.