The Science of Airplane’s Flight Simplified
Airplanes stay in the air because of “one simple fact” there is no net force on them. Because of that, the object which is in rest, stays in rest and the object which is in motion stays in motion (Newton’s First law).
There are four forces which act on an airplane at one time, one pulls it up, one pushes it down, and one slows it down whereas one pushes it forward. The,m ,jxCse four forces are lift, weight or gravity, drag and thrust respectively.
To get an airplane off of the ground and work against the GRAVITY of Earth and WEIGHT of an aircraft, we require LIFT. The wings of the plane also called “airfoils” helps to maximize that LIFT. However, given the massive size of airplane, it needs THRUST to achieve that LIFT off the ground. This is why the airplanes run on the runway and use its entire length to reach the correct speed to obtain that required THRUST. As the plane begins to lift off the ground, the speed allows getting the necessary amount of LIFT under the wings. High pressure at the bottom of the plane and low pressure on the top created by air molecules is also a reason for this LIFT.
The crashing of air molecules which work together to lift the plane off the ground also works against it. Air molecules are the reason which creates DRAG. DRAG is the force which works to slow the aircraft. So here comes the role of one of the most essential component of an airplane, the ENGINE. ENGINE counters the DRAG force with the help of propellers and jets. The spinning fan blades create the THRUST. Their inclined angle acts as small wings which do the magic.
All four forces combine together to make this mega metal bird fly in the air. So next time when you are traveling by air or simply see a tiny-winy airplane creeping in the sky you will be aware of the science behind it.