Within parasitic drag there are three different types as well Form drag is the

# Within parasitic drag there are three different types

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is not associated with the production of lift. Within parasitic drag, there are three different types as well. Form drag is the portion of parasite drag generated by the aircraft due to its shape and airflow around it. Interference drag is from the intersection of airstreams that creates eddy currents and turbulence. Skin friction drag is the aerodynamic resistance due to the contact of moving air with the surface of an aircraft. The second type of drag is known as induced drag, which is associated with the production of lift. This type of drag is always present when the airfoil is producing lift. As lift increases, both parasite and induce drag increases because of these factors. (Pilot’s Handbook of Aeronautical Knowlege, 5-6) We can use something called the lift equation to determine how other variables affect lift as well. The lift equation states that when you double the airplane’s airspeed it will result in four times the amount of lift acting on the airplane. We can also take into consideration how the angle

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2 of attack affects lift and drag as well. The airplane’s angle of attack is the angle between the airplanes chord line and relative wind. As this angle increases, lift is also increased which causes the aircraft to climb, however, if this angle increases too much, or past the critical angle of attack, the wing will stall because there is not enough lift being created due to a disruption of air over the airfoil. When an airfoil increases its angle of attack, it also increases lift and drag but decreases airspeed. (Pilot’s Handbook of Aeronautical Knowlege, 5-5) References F. A. A. (2016). Pilot's Handbook of Aeronautical Knowlege .
• Spring '11
• JamesErnieRogers
• Aerodynamics, Wing, Lift, Handbook of Aeronautical Knowlege

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