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Questions and Answers
What is the definition of a constant-speed prop?
What is the definition of a constant-speed prop?
More info about constant speed prop
What is a force that is always present during the operation of the propeller and must be overcome to cause a change in blade angle?
What is a force that is always present during the operation of the propeller and must be overcome to cause a change in blade angle?
Fixed force
What is the most commonly used variable force that will cause a change in blade angle?
What is the most commonly used variable force that will cause a change in blade angle?
Oil pressure
How does the propeller governor respond to the change in the system RPM?
How does the propeller governor respond to the change in the system RPM?
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What happens to the flyweights when the RPM increases?
What happens to the flyweights when the RPM increases?
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What happens to the flyweights when the RPM decreases?
What happens to the flyweights when the RPM decreases?
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What is the function of the pilot valve?
What is the function of the pilot valve?
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What opposes the movement of the flyweights?
What opposes the movement of the flyweights?
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The governor is in which position when the flyweights are tilted outward and the pilot valve is raised?
The governor is in which position when the flyweights are tilted outward and the pilot valve is raised?
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The governor is in which position when the flyweights are tilted inward?
The governor is in which position when the flyweights are tilted inward?
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Study Notes
Constant-Speed Propeller
- A constant-speed propeller automatically adjusts its blade angle to maintain a set RPM, optimizing efficiency and performance.
Fixed Force
- Always present during propeller operation, must be overcome to change the blade angle.
Variable Force
- Oil pressure is the primary variable force that counteracts the fixed force, enabling changes to the blade angle.
Propeller Governor Function
- Responds to RPM changes by directing oil pressure to adjust the blade angle, returning system RPM to its original value.
Flyweights Mechanics
- When RPM increases, flyweights tilt outward, raising the pilot valve.
- When RPM decreases, flyweights tilt inward, lowering the pilot valve.
Pilot Valve Role
- Adjusts oil flow based on RPM changes to maintain the desired propeller speed through blade angle adjustments.
Speeder Spring
- Opposes flyweights' movement, playing a crucial role in regulating the governor's response to RPM fluctuations.
Overspeed Condition
- Occurs when flyweights are tilted outward, indicating the governor is in an overspeed position.
Underspeed Condition
- Occurs when flyweights tilt inward, indicating the governor is in an underspeed position.
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Explore the key concepts of constant-speed propellers with these flashcards. Each card provides a definition or explanation to enhance your understanding of aircraft systems. Perfect for aviation enthusiasts and pilots alike.
