Chapter 3 Flashcards
DEFINE the boundary layer
The thin layer of air over an airfoil where streamlines demonstrate local airflow retardation due to viscosity
DESCRIBE the different types of flow within the boundary layer
- Laminar flow
- Moves smoothly along in streamlines.
- Produces very little friction
- Easily separated from the surface, allowing easy boundary layer separation.
- think laminate
- Turbulent flow
- disorganized and irregular
- produces large amounts of friction drag
- adheres to surface and delays boundry layer seperation
- raining cats that are hitting the wing, rolling, but clawing to stay on to surface
DESCRIBE boundary layer separation
DEFINE CL MAX AOA
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DEFINE stall
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EXPLAIN how a stall occurs
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IDENTIFY the aerodynamic parameters causing a stall
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COMPARE power-on and power-off stalls
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DESCRIBE the order of losing control effectiveness approaching a stall in the T-6B
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EXPLAIN the difference between true and indicated stall speed
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EXPLAIN the effects of gross weight, altitude, load factor and maneuvering on stall speed, given the stall speed equation
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STATE the purpose of using high lift devices
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DESCRIBE how different high lift devices affect the values of CL, CL MAX, and CL MAX AOA
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DESCRIBE devices used to control boundary layer separation
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DESCRIBE devices used to change the camber of an airfoil
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