Term
| what is the function of a propeller |
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Definition
| creates thrust to pull or push an airplane through the air |
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Term
| what is the difference between a fixed pitch propeller and a controllable pitch propeller |
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Definition
fixed pitch- has a built in blade angle that can not be changed by pilot
controllable- can be changed by pilot |
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Term
| how are some wooden blades protected from wear and damage |
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Definition
| metal tipping fastened to the leading edge and tip |
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Term
| what happens to the blade angle of a constant speed propeller during a constant power dive |
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Definition
| the blade angle increases to prevent an overspeed |
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Term
| what are the functions of a constant speed propeller governor |
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Definition
boosts engine oil pressure before it enters the propeller hub,
senses rotational speed of the propeller,
and adjusts the oil flow to the propeller hub to change pitch and speed of propeller |
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Term
| what is the purpose of propeller counterweights |
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Definition
| causes the blade angle to increase with centrifugal force |
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Term
| what is meant when a propeller governor is in an "on-speed" condition |
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Definition
| the governor is not accelerating or decelerating and the speeder spring and flyweight forces are in balance |
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Term
| how is a constant speed feathering propeller feathered |
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Definition
| controlled by the pilot by moving the propeller control into the feathering detent |
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Term
| what is an un-feathering accumulator |
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Definition
| it is an oil accumulator used to provide oil pressure to un-feather a propeller |
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Term
| what is "alpha range" and "beta range" and where are they found |
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Definition
they pertain to the operating modes of turboprop reversible-pitch props.
alpha- operates in the standard, constant speed mode
beta- operates in zero or min. thrust range and reverse thrust mode |
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Term
| what systems are commonly used for propeller ice control |
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Definition
| alcohol and electrical heat applied to the propeller blade root |
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Term
| what propeller repairs can be performed by a certified mechanic w/powerplant rating |
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Definition
| only minor repairs and alterations |
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Term
| how are wooden prop generally cleaned |
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Definition
| brush or cloth and warm water with mild soap |
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Term
| where would you find the correct method and technique for cleaning an aluminum prop. and hub |
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Definition
| propeller manufacturer's maintenance instructions |
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Term
| what type of nondestructive testing should be accomplished to a propeller after blending |
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Definition
| procedures recommended by the manufacturer |
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Term
| 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 |
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Definition
| the extent of the blade and its blade station location |
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Term
| how can repair file marks be removed from an aluminum propeller |
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Definition
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Term
| when performing a static balance on a 2 bladed propeller, what positions must the propeller be place in when measurements are taken |
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Definition
| vertical and horizontal positions |
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Term
| what is a propeller protractor used for |
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Definition
| it is used to measure propeller blade angle |
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Term
| what blade conditions can cause engine vibration |
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Definition
| can be caused by a propeller being out of track and/or balance, as well as incorrect blade angle setting |
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Term
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Definition
| procedure that compares the position of the propeller blade tips relative to each other |
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Term
| what controls both manifold pressure and r.p.m. on an engine equipped with a fixed pitch propeller |
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Definition
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