How airplanes can fly

The plane is a masterpiece of human in the field of technology. Why can call it that? because through these flying objects man could make the shift from one place to another easily and quickly even to outer space. This thing is very big contribution to development in the world. The working principle of this object is very similar to bird flight. Indeed this also underlies the creation of this flying objects by the discoverer. We may wonder, what caused the plane can fly? There are four forces acting on the thrust plane (B), drag (D), lift (A), and weight (C). when the plane moves, the shape of the airfoil means that air must cover more distance over the wing in the same time as air under the wing. This must mean that air travels faster over the wing. Faster air has less pressure than the slower higher pressure air under the wing. This pressure imbalance is lift. When the plane is at critical velocity (v1), lift equals weight. A few secon later, lift is more than weight and the plane lifts off the ground.

source via siampilot