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LIFT


Lift

Lift is a force generated by the airfoil when the airfoil moves in a streamlined airflow at aerodynamic speeds (above 80 Km/h) with increasing angle of attack. Amount of lift generated by the wing depends on the following parameters.

  • Wing shape
  • Angle of attack
  • Density of Air
  • Wing Plan form surface area
  • Square of free stream air velocity
  • Lifting efficiency of wing

A fast moving fluid creates a dynamic pressure with the airfoil, which is half times the density multiplied by velocity squared.

Lifting efficiency of wing depends on wing shape and angle of attack which is usually expressed as Coefficient of lift.

                    Lift = Co efficient of Lift X Pressure X Area

Lift varies for different type of airfoils with change in angle of attack, Lift is expressed in Newton (N) and the general lift formula is

                    L = ½ X ρ X V2 

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