Science behind flying….
Flying has become very common in modern life. More than 25000 airplanes land at London airport in a single day! But do you have any6 idea how these heavy things with hundreds on board fly in air? I guess most of us do not know. Well I would like to throw some light on this issue. It is all based on mathematical relationship of how things move in fluids. Fluids are all things that can flow – air,water etc. Our atmosphere is made of all kinds of gases. These are all fluids. Similarly our oceans and seas are also fluid. Just following basic principles governing the movement of objects through the fluid, it is easy to travel through the fluids. The branch of Physics that deals with such calculations is called Fluid Dynamics.
Even a small object with very less weight does not fly. So, how does a heavy airplane fly? Well anything can fly if it follow 4 basic forces of movement through fluids. Have you seen a bird fly? Just pay attention how it flies. The 4 forces are lift, weight, thrust and drag. The forces work in pairs. Lift tries to take the object(Plane/ Bird) up and weight pulls it down. So, if a thing has to fly the lift force should be greater than the weight. Engineers have worked their way through this and made the lifting power of airplanes greater than the force of weight. The other pair of forces is the thrust and drag. Thrust pulls the object (Plane/ Bird) forward while drag pulls it back. The propellers of the plane, and the wings of the bird create thrust, while drag is the force of friction that pulls back. So the science of flying is easy, Isn’t it?