Principles of flight lesson 2
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Transcript of Principles of flight lesson 2
![Page 1: Principles of flight lesson 2](https://reader030.fdocuments.in/reader030/viewer/2022020106/568bd7d11a28ab2034a11873/html5/thumbnails/1.jpg)
Principles of FlightLesson 2 – Stability and Control
Stalling
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Principles of FlightStability and Control
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3 aircraft axes
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Why do we want stability?
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Longitudinal Stability
• Response to bumps• Response to aircraft not being
trimmed correctly
![Page 6: Principles of flight lesson 2](https://reader030.fdocuments.in/reader030/viewer/2022020106/568bd7d11a28ab2034a11873/html5/thumbnails/6.jpg)
Lateral Stability
• Response to bumps that lift one wing only
![Page 7: Principles of flight lesson 2](https://reader030.fdocuments.in/reader030/viewer/2022020106/568bd7d11a28ab2034a11873/html5/thumbnails/7.jpg)
Lateral Stability
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Lateral Stability
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Directional Stability
• Response to side forces – e.g crosswinds
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Pilot Controls
• Easiest way to show you is…..
FLIGHT SIM!
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How can we make it easier for the pilot?
• Constantly having to adjust the controls is tiring
• The balance of the plane is always changing due to the weather, weight changes and power settings
• To make life easier for the pilots, the thoughtful designers add Trim Tabs
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Trim Tabs
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Trim Tabs
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Other control surfaces
• Flaps - revision
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Flaps
• Flaps can extend to different positions– 0, 30, 60, 90 typical
• Flaps greatly increase lift with not much drag penalty up to around 60°
• From 60° to 90° the drag shoots up• To maintain speed, the pilot lowers
the nose – giving a better view of the runway
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Flaps
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Flaps
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Slats
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Flaps and Slats working together
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Principles of FlightStalling
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Stalling
• What is a stall?• Why does a stall occur?• What affects the speed at which the
stall occurs
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What we learnt last week• Increase in AoA increase lift
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What we learnt last week• Lift increase with AofA until it stalls
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Things that affect the stall - weight
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Things that affect the stall – ‘g’
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Things that affect the stall – angle of bank
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This is what happens!
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Things that affect the stall – power
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Things that affect the stall – flaps
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Things that affect the stall – other things!
• Ice – build up changes the shape of the wing and can greatly increase the stall speed
• Wing damage – damage can disrupt airflow and increase stalling speed