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Theory of Flight

Theory of Flight

  •  For the technician provided maintenance on aircraft It’s important to know the piece of aircraft understand the function of each a component like wing, fuselage, empennage, engine and many others how it operates and know the study of physics it’s including basic of aerodynamics it’s very important to know why aircraft fly like that.

 Four Forces of Flight :

  • When aircraft on the air is acting by 4 forces each of these forces has a function, lift, weight, drag, thrust, the force of the weight is the pull of the gravity on the masse of aircraft and lift is defined as upward force produce by wing and drag is the friction by airflow around the aircraft and thrust the force create by the engine.
  •  The force lift is opposite weight and drags opposite thrust, all these forces are measured by pounds, in the acceleration of aircraft the thrust is big than drag, and in decelerating the drag is big than the thrust and when those force are equal we have constant velocity, when aircraft climbing the lift is big than weight, and when is descending the opposite.

 Bernoulli’s Principle : 

  • This principle of the Swiss physicist, Daniel Bernoulli about the study of air as it flows through ether converging and diverging passage is saying that as the velocity of fluid increases the static pressure of this fluid will decrease is provided that no additional or taken of energy happen.
  •  the converging shape is described as a cross-sectional area to get progressively small from entry to exit. A diverging shape is just the opposite of this, the cross-sectional area can get large from entry to exit.  the air exits at an increased velocity and a decreased static pressure when looking at the pressure and velocity gauges, and the indicated velocity and pressure. The unit leaving must increase its velocity as it flows into a smaller space because a unit of air must exit the duct when another unit enters on this.
  •  the diverging duct, just the opposite would happen. From the entry point to the exit point, the duct is spreading out and the area is getting larger, the velocity of the air decreases, and the static pressure increases on diverging. The total energy in the air has not changed.
  • When we are the talk  of Bernoulli’s principle  we don forget to talk about a venturi  on the wing is shown tucked up into the recess where the venturi’s converging shape is. Is exit two arrows showing airflow? The large arrow shows airflow within the venturi, and the small arrow shows airflow on the outside heading toward the leading edge of the wing of aircraft.


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