Shared Flashcard Set

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aviation maintenance
magneto 2
21
Aviation
Undergraduate 2
01/27/2014

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Cards

Term
What are the 2 purposes of the impulse coupling
Definition
Give a quick snap at start up to produce a spark and to retard the timing
Term
What is the purpose of the 2nd set of breaker points in a duel breaker magneto
Definition
Retarded spark and retarded start
Term
What is the difference between a booster coil and a induction vibrator
Definition
IV- uses the primary and secondary coils
BC- has its own primary and secondary coils and uses the distributor
Term
Describe how to set the distributor timing on a bendix magneto
Definition
gear on magnet lines up with specific tooth on distributor
Term
How should the points on a magneto look in a visual inspection they are good
Definition
Frosty
Term
What is point bounce
Definition
When the breaker point spring doesn't have enough tension
Term
What would happen if the impulse coupling spring broke while the engine was running
Definition
Engine would fire in the regard position
Term
How does a booster coil work
Definition
Current goes into primary winding producing magnetism which opens the contact points then shutting off the magnetism and sending a current into the secondary winding and sending a spark to all the high tension leads
Term
Describe the difference between a high tension system and a low tension system
Definition
Position of the winding
Low-remote
High-inside
Term
What are keepers made of
Definition
Laminated soft iron
Term
When should you set the internal timing of a magneto
Definition
As you are assembling it
Term
What would be the result of increasing the gap of the breaker points in a magneto
Definition
Advance the spark an decrease the intensity
Term
What do the timing marks indicate when timing a mag internally
Definition
Points are starting to open at top dead center
Term
What will be the result of increasing the gap of the breaker points in a booster coil
Definition
Lower frequency and higher voltage
Term
What is th electrical location of the primary capacitor in a high tension magneto
Definition
Parallel with the primary circuit
Term
In a ignition system, what is the purpose of the capacitor
Definition
Protect the points
Term
As the aircraft engine increases the voltage induced into the primary magneto will what?
Definition
Increase
Term
Failure of a engine to quit firing is a indication of what
Definition
Faulty p-lead or switch
Term
What is the result of a flash over
Definition
Carbon tracking
Term
What Is flashover
Definition
Jumping of high voltage inside the distributor
Term
What is the relationship of the distributor and the crankshaft speed of the reciprocating engine
Definition
Distributor is half the speed of the crankshaft
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