The higher the velocity and airspeed of the aircraft the higher airflow over the wing, therefore the higher the lift being produced. Velocity affects the total aerodynamic force, both lift and parasite drag increase with an increase of the velocity of the airflow over the wing. Interestingly, in relation to lift and drag forces, if we double the velocity of the airflow we quadruple the lift and parasite drag being produced. Velocity Changing the flap setting effectively changes the camber and shape of the wing. More flap creates more lift and also creates more drag. Flap setting Drag is the force that acts in the opposite direction of thrust. Drag is caused by friction of a solid object against the airflow, differences in air pressure, and the creation of lift. Drag As we increase the camber of a wing the lift will increase and so will the drag. Whenever lift increases so does the induced drag. Shape Even slight damage to a wing and the propeller can create changes to the lift and drag for the aerofoil and affect the performance. For instance, if a wing hits a bird and part of the wing has been damaged, this can disturb the airflow over the wing and decrease the total lift. Slight damage to the propeller can have serious implications. Even a small stone chip can cause structural cracks that could lead to vibrations and eventually total blade failure, so this is why a good inspection of the propeller is vital before every flight. Damage Ch.2 - How an aircraft generates lift
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