Chord Line, Mean Camber, Leading/Trailing Edge, Bernoulli’s Principle,
Newton’s Laws, Angle of Attack, Center of Pressure, Wing Planform,
Taper, Aspect Ratio, Sweep, Longitudinal/Lateral/Directional Stability,
Dihedral, Keel Effect, Load Factor, Wingtip Vortices, Torque, Spiraling
Slipstream, Gyroscopic Precession, P-Factor, Stall, Spin,
Maneuverability, Control Surfaces, Flaps, Trim Systems, Flight
Envelope, Static & Dynamic Stability, and Crosswind Operations Exam
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What is Airfoil?
Structure designed to obtain reaction upon its surface from the air through which it moves or
that moves past such a structure.
What is the Camber?
The convexity of the curve of an aerofoil from the leading edge to the trailing edge.
What is the Leading Edge?
The part of the wing that first contacts the air.
What is the Trailing Edge?
, The rear edge of an aerofoil where the airflow separated by the Leading Edge rejoins and where
the essential control surfaces are located.
What is the Cord Line?
An imaginary straight line drawn between the leading edge and the trailing edge of an aerofoil,
in the direction of the normal airflow.
What is the Mean Camber Line?
An imaginary line which lies halfway between the upper surface and lower surface of the airfoil
and intersects the chord line at the leading and trailing edges.
How does the pressure change below and above the wing?
Faster air traveling over the wing creates a negative and low pressure. Slow air traveling under
the wing creates a positive and high pressure.
What two things describe how lift works?
Bernoulli's Principle and Newton's Third Law
What is Bernoulli's Principle?
Air moving over the curved upper surface of the wing will travel faster and thus produce less
pressure than the slower air moving across the flatter underside of the wing. This difference in
pressure creates lift which is a force of flight that is caused by the imbalance of high and low
pressures.