Podcast
Questions and Answers
What determines the magnitude of the lift and drag forces of a wing cross-section?
What determines the magnitude of the lift and drag forces of a wing cross-section?
- The wing shape
- The pressure distribution around the wing (correct)
- The angle of attack
- The airspeed
At what angles of attack are the lift and drag forces of a wing cross-section normal to each other?
At what angles of attack are the lift and drag forces of a wing cross-section normal to each other?
- 45 degrees only
- 0 degrees only
- 90 degrees only
- They are never normal to each other (correct)
What happens to the pitching moment when trailing-edge flaps are deployed in level flight?
What happens to the pitching moment when trailing-edge flaps are deployed in level flight?
- Dependent on the CG location
- Nose-down
- Remains unchanged
- Nose-up (correct)
How does the induced drag and wing-tip vortices change with increasing angles of attack?
How does the induced drag and wing-tip vortices change with increasing angles of attack?
Which factor results in the induced angle of attack?
Which factor results in the induced angle of attack?
What effect do vortex generators have on wing-tip vortices?
What effect do vortex generators have on wing-tip vortices?
At a constant IAS and mass in level flight during flap selection, what happens?
At a constant IAS and mass in level flight during flap selection, what happens?
What causes pitch up at low speed?
What causes pitch up at low speed?
Regarding the boundary layer, which of the following statements is correct?
Regarding the boundary layer, which of the following statements is correct?
Which of the following statements is correct?
Which of the following statements is correct?
The most important advantage of the turbulent boundary layer over the laminar boundary layer is:
The most important advantage of the turbulent boundary layer over the laminar boundary layer is:
For a positively cambered aerofoil when Cl is zero, what happens to the pitch moment?
For a positively cambered aerofoil when Cl is zero, what happens to the pitch moment?
What does Winglets improve in an aeroplane's performance?
What does Winglets improve in an aeroplane's performance?
The direction of spanwise flow is from:
The direction of spanwise flow is from:
The CP of a positive cambered wing at an increasing angle of attack will:
The CP of a positive cambered wing at an increasing angle of attack will:
What happens aft of the transition point between laminar and turbulent flow?
What happens aft of the transition point between laminar and turbulent flow?
Flashcards
Lift and Drag Forces
Lift and Drag Forces
Pressure distribution around the wing determines the magnitude of lift and drag.
Induced Drag and Angle of Attack
Induced Drag and Angle of Attack
Increasing the angle of attack increases wing-tip vortices and induced drag.
Induced Angle of Attack Cause
Induced Angle of Attack Cause
Downwash due to wing-tip vortices causes the induced angle of attack.
Vortex Generator Effect
Vortex Generator Effect
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Flap Selection Effects
Flap Selection Effects
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Low-speed Pitch Up Cause
Low-speed Pitch Up Cause
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Stagnation Point Shift
Stagnation Point Shift
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Winglet Function
Winglet Function
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Spanwise Flow Direction
Spanwise Flow Direction
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CP of a positive cambered wing at an increasing angle of attack
CP of a positive cambered wing at an increasing angle of attack
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Aft of the Transition Point
Aft of the Transition Point
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