30 Questions
What is the primary function of the spinner bulkhead in a propeller system?
To hold the spinner in place
What is the purpose of the cuff in a propeller system?
To increase the flow of cooling air to the engine nacelle
In a constant speed propeller, what mechanism is used to change the blade angle?
Centrifugal flyweight mechanism
What component is responsible for moving a propeller to fine pitch using engine oil?
Pitch change mechanism
What determines the strength and stiffness of propeller blades?
Material, diameter, and orientation
In a counterweight propeller, what causes the propeller to move to a higher pitch?
Centrifugal force acting on counterweight
What is the direction of rotation for a right-handed propeller when viewed from aft - looking forward?
Clockwise
How does increasing the blade angle affect the pitch of a propeller?
The pitch becomes coarser
What kind of propellers are driven by the same engine on the same shaft but rotate in different directions?
Contra-Rotating Propellers
What is propeller torque a measure of?
Resistance offered by the propeller to rotation
What is effective pitch in relation to a propeller?
The actual distance a propeller moves in one revolution
How is propeller efficiency defined?
Ratio of useful work done by the propeller to work done by the engine
What controls the propeller pitch directly when the pilot selects the propeller to Beta range?
Power lever
What happens to the propeller blade angle when the power lever is advanced while the propeller is set to Beta range?
Increase
What will cause the propeller to overspeed according to the text?
Propeller governor flyweights overcoming the speeder spring
What is used to make the propeller move towards fine pitch in the text?
Counterweight at the blade root
How is a constant speed propeller set for take-off according to the text?
Low pitch (fine) and high RPM position
What provides maximum efficiency by adjusting blade angle for most conditions during flight?
Constant Speed Propeller
What is the purpose of the propeller over speed governor?
To serve as a backup for the propeller governor
How does a constant speed propeller system work?
By allowing the pilot to select propeller and engine speed
What happens when a force is applied to the speeder spring?
The blade angle becomes coarser
How does a propeller synchrophasing system reduce vibration and noise?
By adjusting the phase angle between propellers
What varies directly with engine speed in a constant speed propeller system?
The rotational speed of the flyweight assembly
Why is the propeller over speed governor mounted on the reduction gear box?
To act as backup for the propeller governor
How is the propeller anti-icing fluid delivered to the individual blades?
By pumping it to a slinger ring
How is propeller blade balance achieved when a 2-blade prop is placed on a knife edge?
By adjusting the blade track with shims on the propeller shaft hub
What is the suitable inspection method for cracks in an aluminum alloy propeller?
Dye penetrant inspection
How is propeller de-icing achieved using electrical boots?
Heating in timed sequence with inboard and outboard boots
If a wooden propeller blade tip or trailing edge is slightly damaged, how should it be repaired?
By sanding to a new profile
What is the maximum pressure developed by the pump for delivering anti-icing fluid to the blades?
10 psi
Test your knowledge on ground adjustable propeller hubs made of two-piece steel construction with clamps. Learn about propeller pitch control in Beta range and how the propeller operates between maximum reverse pitch and flight idle pitch. Explore the mechanisms for directly controlling the propeller pitch and unfeathering the propeller.
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