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Cards In This Set
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What is an airfoil?
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Any surface, such as a wing, propeller, rudder etc. Designed to provide an aerodynamics force when interacting with a moving stream of air.
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How is a shape of an airfoil chosen?
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Based on the intended application.
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What is a chordline?
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A striaght line joining the leading edge (LE) and trailing edge (TE).
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What is relative airflow?
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The opposite direction of the path the aircraft is travelling.
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What is the angle of attack (AoA)?
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The angle between the chordline and relative airflow.
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What is a span?
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It is the length of the aircraft from one wing tip to the other.
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What is Camber?
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The camber of an airfoil is its curvature.
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What will happen when camber is increased on the upper surface?
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It will cause airflow over it to accelerate more, generating more lift at the same angle of attack.
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When does the point of maximum camber occur?
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When the distance between camber line and chordline is the greatest and is an important factor in determining the high and low speed performance of an airfoil.
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What is the thickness/chord ratio?
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Thickness/chord ratio or t/c describes an airfoils relative thickness. It is a factor in determining an airfoils inflight characteristics.
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What is the equation to find lift?
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L = CL 1/2 pV2 S
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What does each variable represent in the lift equation?
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CL = Camber - (AoA)1/2 pV2 = Airspeed (dynamic pressure)S = Surface Area
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What are coupled moments caused by?
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The are caused by the interaction of two moments separated by a horizontal distance.
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Which couple is stronger?
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L-W couple is stronger than T-D couple.
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How many types of energy does air in steady motion have?
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Two.
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