Powerplant - Propeller Flashcards
What is the purpose of a propeller?
To create thrust and either push or pull the airplane through the air
What are two classifications of propellers?
The tractor and the pusher type
What type of propeller has the blade angle built into the propeller and cannot be changed?
A fixed pitch propeller
What is the purpose of the metal tipping on a leading edge of a wooden propeller?
To protect the propeller from flying particles in the air during landing, taxiing and takeoff
What is the process of determining the positions of the tips of the propeller blades relative to each other?
Blade Tracking
What tool is used to determine propeller blade angle?
Universal propeller protractor
What is the meaning of propeller blade “back” and “face”?
The cambered or curved side of the propeller blade is called the blade back and faces away from the engine. The flat side of the propeller is known as the blade face and this side of the blade faces the engine
What should be used to clean aluminum and steel propeller blades and hubs?
They should be washed with a suitable cleaning solvent using a brush or cloth
What positions are used on a balance stand to check a two bladed propeller for static balance?
First, the vertical position and then the horizontal position
How is feathering accomplished on a constant speed counterweight propeller?
Releasing the governor oil pressure allows the counterweights and feathering spring to move the blades to the feather position
What type of ice control systems are used for propellers?
Either fluid or electrical deicing systems are used for deicing propellers
What is the purpose of a slinger ring on some propeller installations?
Propeller deicing fluid is ejected from a stationary nozzle on the engine into a scoop attached to the rear of the propeller assembly. The U shaped channel is called the slinger ring. The fluid under pressure of centrifugal force is transmitted through a nozzle to the propeller blades
Explain blade tracking?
It is the process of determining the position of the tips of the propeller blades relative to each other
Do the counterweights on a constant speed propeller increase or decrease the propeller?
The centrifugal force of the counterweights is used to increase the pitch of the blades
