Lift Theory

A boy flying a kite dirty dog be considered to be a pilot in entrust of an aero carpenters plane! Ponder the idea a moment and it whitethorn not appear quite as absurd as it seems at first glance. A kite is an inclined plane (material surface inclined at an acute angle to horizon), the lading of which is supported in the piece of cake by the reaction of the sneak flowing against it. If we substitute for the string, which holds the kite against the wind, the engine and propeller of an aeroplane, which depart the wings forward against the circulateflow, we will see that the analogy of the kite is not without some validity. The wings of an aeroplane are so designed that when moved by the air horizont wholey, the force exerted on them produces a reaction as nearly vertical as possible. It is this reaction that lifts the weight of the aeroplane.

2.By definition lift is that circumstances of total aerodynamic reaction which is perpendicular to the flight course of study of the aircraft. The fact that air is invisible makes flight difficult to understand. When a ship passes through water we can see the turn away wave, the wash behind, and all the eddies and whirlpools which are formed, whereas when an aeroplane makes its way through the atmosphere nothing appears to happen, yet in reality, even to a greater extent clamor has been caused than by the ship (Fig 6-1).



If only we could see this commotion mevery of the phenomena of flight would need much less explanation. unitary way to see this commotion is by introducing smoke into the air or by watching the flow of water, which exhibits many characteristics kindred to those of the air (fluid= liquid or gas).

3.Another property of air which is apt to give us misleading ideas when we first dismay to study flight is its low density. The air feels thin, it is difficult for us to obtain any grip upon it, and if it has any weight at all we usually consider it as negligible for all practical purposes. Ask anyone what is the weight of air in any ordinary room and you will probably receive answers...If you need to get a full essay, order it on our website: Ordercustompaper.com



If you want to get a full essay, wisit our page: write my paper