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Friday, 18 August 2017

HOW DOES AIRPLANE DEFIES GRAVITY

One of the important miracle of Engineering is a flying airplane.A child or a elder ,everyone loves to see an airplane flying . If we throw a ball on the sky it come back , but an airplane doesn't...why?? Ever wonder how it can breaks gravitational force & fly (HOW DOES AIRPLANE DEFIES GRAVITY)?? What happens during  take off - flying -landing?? Read below to know ......


Flying an airplane is more than a miracle ,its all hidden in those FORCES which are acting on the plane. To fly an airplane generally 2 types of forces are necessary i.e lifting & thrust.But in real time 4 types of forces acts on the plane.Those are ....
  • Lift 
  • Drag
  • Thrust
  • Weight

LIFT FORCE 
This is the force which lifts the plane.It is always necessary to run on road until it gets the required speed to take off. When the plane reaches that speed it extends its wing downwards .so that air will strike on that wings.During air strikes wings opposes that air due to which air lifts the plane. That is called lifting force. 

DRAG FORCE
It is the force created due to air resistance , due to the movement air strikes on wings as well as on the front of plane.The force developed is drag force.

THRUST
The force which push suddenly or violently in a specified direction is called thrust.In plane thrust is produced by propeller or by some other mechanism according to the type.Well it is the force which pushes the plane to move forward.

WEIGHT
Like everything the plain also deals with its own weight. Generally the force which the plane to downward is weight. It is exactly opposite to the lift fore. For flying it is necessary that the lift force must be more that the weight.


WORKING PRINCIPLE
To achieve flight, airplanes must defeat gravity and their weight, and they do this through lift, to move forward, finally to overcome air resistance(called drag) through thrust.

An airplane in flight is the center of a continuous war between those four forces. Thrust is generated by the propeller and opposes drag caused by air resistance to the frontal area of the airplane.During take off, thrust must overcome drag and lift must overcome the weight before the airplane can become airborne .When the plane reaches that speed it extends its wing downwards .so that air will strike on that wings.During air strikes wings opposes that air due to which air lifts the plane. That is called lifting force.  For level flight at constant speed, thrust exactly equals d and lift exactly equals the weight or gravity force. For landings thrust must be reduced below the level of drag and lift below the level of the gravity force or weight. The lifting of the airplane is the application of Bernoulli's Principle which is the heart of this topic.

TURNING PRINCIPLE

During turning plane follows a circular path. A plane  turns by turning the wings in the direction of the desired turn at a specific angle. This angle is referred to as the bank angle. During flying straight and on level, wings of an plane develop the upward force in an upward direction, perpendicular to the wing. However, when a pilot turns  the wing, the force is then divided into vertical and horizontal forces. It is  horizontal component of the produced lift force, that turns the aircraft. This force acts as a centripetal force, trying to maintain the circular movement of plane.


In order to turn an plane in an efficient manner, it is necessary that all the four primary controls are available. It is  needed to  ailerons (rectangular flaps at the back of the wing) to turn and hence initiate the turn, the elevator to maintain your altitude during the turn, the rudder to coordinate the movement of the nose and of course the throttle to increase/decrease thrust while turning, thereby affecting the radius of the turn.

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10 comments:

  1. This is really interesting. I am always amazed how planes stay in the sky and ships don't sink! Luckily I paid enough attention in psychics class to grasp the principles!

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    1. I am so glad that u read it. Well engineering is all about logic and principles. For more updates keep in touch with techiengineer

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  2. It's incredible how aeroplanes work and the mind boggles at the science behind it x

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    1. Thank you for reading it. As a engineer i always know how engineering always surprise us with logic and working principle.

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  3. As a kid it always used to bug me how planes managed to defy gravity and though I gave up on the thought it has been interesting reading about it.

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  4. This is so interesting. I always find it amazing how huge great machines can stay airborne.

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  5. This was an interesting read. It always amazes me how planes get up in the sky and stay there

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  6. This is a great post. It's amazing how much goes into keeping an aeroplane flying in the air - something we definitely don't appreciate!

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  7. Interesting facts. It's amazing how much you can learn from engineering :)

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  8. Interesting post, good refresher of my physics at school!

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