Propeller Flashcards
The propeller system is divided into two type of control. What are they ?
One for flight and one for ground operation
What is the purpose of a propeller ?
To create thrust and either pulling or pushing the aircraft through the air
What are the two type of propeller configuration?
Tractor ( pulling) and pushing type
What is the purpose of the metal tipping on a leading edge of a wooden propeller ?
It protect the propeller from damage caused by FOD In air ,landing, taxing , and takeoff
What type of propeller has the blade angle built into the propeller and cannot be changed?
Fix pitch propellor
What tool is used to determine propeller blade angle ?
Universal propeller protractor
What are the aerodynamic force and load acting on a rotating propeller blade?
Centrifugal force , centrifugal twisting , aerodynamic twisting ,torque bending and thrust bending force
What is the meaning of propeller blade “back “ and “face”?
Blade back is the side facing away from the engine , blade face is the side facing the engine and the pilot .
What should you used to clean aluminum and steel propeller blade and hubs?
Suitable cleaning solvent using a brush or cloth
Can a fixed pitch propeller’s pitch be changed ?
No they are fixed at specific angle
Why do you put the blade of a counterweight propeller into high pitch before stopping the engine ?
This type of propeller has movable cylinder that slides over a fix piston. In high pitch position the cylinder moves inboard covers the piston protecting it from dirt and moisture in the air .
Why are cones installed on splined shaft with a propeller ?
Cone center the propeller on the shaft as they are force toward each other by tightening of the nut
How is feathering accomplished on a constant speed counter weight propeller ?
By releasing governor oil pressure on the counterweights . The featuring spring moves the blade to the feather position and oil return to the engine
What type of system are used for deicing propellers ?
Fluid or electrical
What is the purpose of slinger ring on some propeller installation ?
Deicing fluid is ejected from a stationary nozzle on the engine into a u-shape channel attached to the rear of the propeller assembly. Slinger ring is call the u-shaped channel
What is blade tracking ?
To determine the position of tip of propeller blade relative to each other
Do the counterweight on a constant speed propeller increase or decrease of the blade angle ?
Centrifugal force of counterweight increase the pitch of the blades
What should you adjust if pilot request 50 more rpm on the aircraft equipped with a constant speed propeller ?
Adjust the governors prop-level set screw
Why are propeller indexed to the crankshaft of an engine
To reduce vibration
Can transverse cracks in a propeller be repaired
No
What is the alpha range and beta range of a propeller?
Alpha range is the propeller position when aircraft is in flight. Beta range is the condition of the propeller during ground operation, and and reverse pitch position 
When changing a metal bushing on a wooden propeller assembly, a thorough inspection of the bolt hole should be accomplish. Why?
To check for check for elongation of the holes
How are wooden propellers cleaned?
Soap and water 
What happened to a constant speed feathering propeller when the propeller governors oil pressure drops to 0 psi?
It returns to the feathered position
