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== Explanation == | == Explanation == | ||
− | Airfoils are the characteristic shapes of any wings, propeller blades, compressor or turbine blades in an [[aircraft]]. This shape produces the aerodynamic force needed for an aircraft as it moves through the air at a certain angle, called [[angle of attack]], by turning the incoming airflow downwards. This exerts an opposite aerodynamic force on the airfoil about its | + | Airfoils are the characteristic shapes of any wings, propeller blades, compressor or turbine blades in an [[aircraft]]. This shape produces the aerodynamic force needed for an aircraft as it moves through the air at a certain angle, called [[angle of attack]], by turning the incoming airflow downwards. This exerts an opposite aerodynamic force on the airfoil about its center of pressure. The [[lift]] is the vertical component of this aerodynamic force to the direction of motion, and the [[drag]] is the horizontal component of it. |
[[File:Lift-and-drag-airfoil.svg|center|frame|The total aerodynamic force is resolved into lift and drag.]] | [[File:Lift-and-drag-airfoil.svg|center|frame|The total aerodynamic force is resolved into lift and drag.]] | ||
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== Frequently Asked Questions == | == Frequently Asked Questions == | ||
=== What is stalling? === | === What is stalling? === | ||
− | [[Stall]]ing is | + | [[Stall]]ing is an aerodynamical situation in a typical fixed-wing aircraft, where the wings will stop producing required lift. This happens mostly when the angle of attack of an aircraft increases beyond the critical angle of attack, which is also called as the stalling angle of attack. Sometimes, a stall can happen when there is not enough airspeed for an aircraft to generate lift. Most stalls can be recovered by pitching the nose of the aircraft down, thereby reducing the angle of attack. However, in the case of deep stalls, a dangerous stall where a stalled wing pitches the plane up and masks any airflow to its tail section, the recovery will be hard as the elevators will not be able to help the pilot in pitching down the plane. As there is no lift produced by the wings during a stall, the altitude drops usually and it is always a crucial factor for a recovery maneuver. |