Aeronautics-A dream to fly.

Concept of Lift and Drag! George Cayley's theory. The most crucial force responsible for the aircraft to fly is the lift force, so it’s necessary to know the concept of how lift is generated important. To understand lift, imagine a cardboard. And let’s consider two situations: You are holding cardboard perfectly horizontal against the wind. You are holding cardboard tilted up making some angle with the horizontal against the wind. CASE 1: You are holding cardboard perfectly horizontal.             In this case you can see that the cardboard exerts a force on your hand (negligible) but do not exert any force in vertical direction and stays as it is. This force that pushes the cardboard back is due to cardboard opposing the flow of air. This force is known as ‘Drag’ CASE2: You are holding cardboard tilted up making some angle with the horizontal against the wind.             In this case as soon as you hold the cardboard at some angle against the wind you see that