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The Magic of… Bernoulli’s Principle. Aerodynamics is… The study of forces and the resulting motion of objects through the air.

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Presentation on theme: "The Magic of… Bernoulli’s Principle. Aerodynamics is… The study of forces and the resulting motion of objects through the air."— Presentation transcript:

1 The Magic of… Bernoulli’s Principle

2 Aerodynamics is… The study of forces and the resulting motion of objects through the air.

3 Airfoil - A part or surface, such as a wing, propeller blade, or rudder, whose shape and orientation control stability, direction, lift, thrust, or propulsion.

4 the force that directly opposes the weight of an airplane and holds the airplane in the air

5 Bernoulli’s Principle States… The pressure of a fluid decreases as the speed of the fluid increases.

6 Daniel Bernoulli first formulated this principle in the 1700’s.

7 Lift can be explained in part by the Bernoulli Principle. A Swiss mathematician, Bernoullli discovered that as the speed of a fluid increases, its pressure decreases. Air is a fluid so as it flows over a wing or airfoil, the wing’s shape and angle of attack cause the air to speed up above the wing’s surface. As the air speeds up, its pressure goes down, creating a low pressure area above the wing. This low pressure area creates lift, drawing the aircraft upward.

8 Bernoulli’s Principle Both streams must meet at the end of the wing at the same time. Stream A has farther to go; therefore, it must travel faster.

9 Factors that Affect Lift The Motion: Velocity and Angle of Attack The Object: Shape and Size The Air: Mass, Viscosity, Compressibility

10 Angle of Attack The acute angle between the direction of the relative wind and the chord of an airfoil.

11 Shape of the Wing Camber- A measure of the curvature of the airfoil Chord-The width of an airfoil or wing Leading Edge- The front, usually rounded, edge of an airplane wing or airfoil Trailing Edge- The rear edge of the wing

12 Chord Line Upper Camber Leading Edge Angle of Attack Lower Camber Trailing Edge

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14 the force generated by the gravitational attraction of the earth on the aircraft; lift must be equal to weight in order to sustain flight.

15 a force applied to a body to propel it in a desired direction; the force which moves and aircraft through the air

16 Resistance of the air (technically a fluid) against the forward movement of an airplane


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