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22 Cards in this Set
- Front
- Back
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What is the function of a propeller?
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The prop blades create thrust to pull or push an airplane....
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What is the difference between a fixed pitched prop and a controlled pitch prop?
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A fix pitch pro is one that has a build-in blade angel that cannot be changed by the pilot. These props can have the blade angel changed by the manufacture or approved repair station to optimize performance. A controllable pitch prop is one that can be changed by the pilot and is usually controlled by a governor that maintains a constant speed .Some controllable props also provide reverse pitch and feathering..
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How are some wooden prop blades protected from wear and damage?
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Metal tipping fastened to the leading edge and tip...
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What happens to the blade angle of a constant speed prop during a constant power dive? |
The blade angle increases to prevent an over speed... |
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What are the functions of a constant speed prop governor ?
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It boost engine oil pressure before it enters the prop hub, it senses rotational speed of the prop, and then adjust the oil flow to the prop hub to change pitch and therefore , speed of the prop....
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What is the purpose of prop counterweights?
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Centrifugal force acting on the counterweights causes the blade angle to increase....
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What is meant when a prop governor is in a "on-speed" condition?
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The governor is not accelerating or decelerating and the speeder spring and flywheel forces are in balance....
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How is a constant speed feathering prop feathered? |
By releasing oil pressure on the governor, the counterweights and feathering spring move the prop into feather. This happens automatically if the governor oil pressure drops to zero, or can be manually controlled by the pilot by moving the prop control into feathering detent.... |
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What is an unfeathering accumulator?
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Is an oil accumulator used to provide oil pressure to unfeather a prop...
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What is "Alpha range" and "Beta range", and where are they found?
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The apha and beta ranges pertaining to the operating modes of a turboprop reversible-pitch prop. Alpha range prop operated in standard constant speed mode, usually in flight. In beta range , the prop is operating at zero or min thrust and negative or reverse trust mode, usually on the ground.. |
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What system are commonly used for prop ice control?
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Fuid(alcohol) and electrical head applied to the prop blade root....
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What prop repair can be performed by a certificated mechanic with a powerplant rating?
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Only minor repairs and alterations can be performed by a certificated mechanic with a powerplant rating. Major repairs must be done by manufacture or certificated repair station. The pro manual outlines the scope of repairs...
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How are wooden prop generally cleaned?
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With brush or cloth and warm water with mild soap....
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Where would you find the correct method and techniques for cleaning an aluminum prop hub?
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The manufature maintenance instruction...
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What type of nondestructive testing should be accomplished to a prop after bleeding?
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Procedured recommended by manufacture....
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What are 2 criteria used by many manufacturer to determine the amount of bend damage that can be repaired by cold bending of aluminum prop?
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The extend of the bend and its blade station location...
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How can repair file marks be removed from aluminum prop?
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With very fine sandpaper....
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When performing a static balance on a 2 bladed prop, what positions must the prop be placed in when measurements are taken?
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Vertical and horizontal positions...
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What is a prop protractor used for?
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It is used to measure prop blade angle...
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What blade conditions can cause engine vibration?
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Can be caused by prop being out of track and/or balance , as well as incorrect blade angle setting...
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What is blade tracking? |
Blade tracking is a procedure that compares the position of the prop blade tips relative to each other... |
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What controls both manifold pressure and R.P.M on an engine equipped with a fixed pitch prop?
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The Throttle....
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