Scheduled maintenance: Wednesday, February 8 from 10PM to 11PM PST
Upgrade to remove ads
Only $35.99/year

Propellers

Terms in this set (24)

what is the purpose of propellers?
The blades produce forces that create thrust to pull or push the airplane through the air
what is a fixed pitch propeller?
A fixed pitch propeller is one that has a built-in blade angle that cannot be changed.
what type of blade angle change will occur on a propeller, that is pitch controlled by a propeller governor, during a constant power drive?
the blade angle increases to overcome overspeeding
other than maintaining constant speed, what are two actions of some controllable propellers?
reverse pitch and feathering
what is the purpose of metal tipping fastened to a wooden propeller leading edge and tip?
protect the propeller from damage
on light aircraft propellers, what is the effect of centrifugal force acting on propeller blade counterweights?
serves to increase propeller blade pitch
how is feathering accomplished on a constant speed propeller?
Releasing the governor oil pressure allows the counterweights and feathering spring to feather the propeller.
what types of systems are used for propeller ice control?
fluid and electrical
when engine vibration is reported, what should be checked to determine if it is caused by engine or propeller?
blade tracking and blade angle setting
what is blade tracking?
Blade tracking is determining the positions of the propeller blade tips in relation to each other.
what may be used to determine propeller blade angle?
propeller protractor
what positions of a 2 bladed propeller are used during a static balance test?
vertical and horizontal
what can be uses to clean a wooden propeller?
warm water and mild soap with a brush or cloth.
to what do the terms alpha range and beta range pertain?
both terms pertain to operating modes of turboprop reversible pitch propellers
what is the alpha range of a turboprop?
the alpha range is operation in the constant speed mode(usually in-flight)
what is the beta range of a turboprop?
the beta range is operation in the minimum or zero thrust, and negative(reverse) thrust modes (usually for ground handing and taxiing)
what two forces are balanced in propeller governor in an on speed condition?
speeder spring and flyweights
what happens to a constant speed feathering propeller when the propeller governor oil pressure drops to zero?
the propeller will feather
how do you determine the reparability of a damaged propeller blade?
By reference to the manufacturer's manual.
how should aluminum propeller blades and hubs be cleaned?
in accordance with the manufacturer's recommendation
what type of nondestructive testing should be accomplished to a propeller after blending?
procedure recommended by the manufacturer.
what 3 things does a typical constant speed propeller governor accomplish when operating?
(1) it boosts engine oil pressure before it enters the propeller hub; (2) it controls the amount of oil that flows to the propeller; (3) it senses the rotational speed of the engine.
what may be used to remove repair file marks from aluminum propellers?
Very fine sandpaper.
what are the 2 criteria used by many manufacturers to determine the amount of bend damage that can be repaired by cold bending of aluminum propellers?
(1) the extent of the bend ; (2) its blade station rotation
Students also viewed