Flashcards on Aircraft Engine Ignition Systems
Aircraft Engine Ignition Systems: Comprehensive Student Guide
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Aircraft Ignition Systems
31 cards
Card 1
Question: What malfunction would allow a reciprocating engine to keep running after the ignition switch is turned Off?
Answer: The ignition switch not grounding the magneto primary circuit.
Card 2
Question: What turns on the autoignition system in a turbo-prop engine?
Answer: A torque pressure switch that energizes the system when the engine stops producing torque.
Card 3
Question: Why must a torque wrench always be used when installing spark plugs in an aircraft engine?
Answer: If too loose, spark plugs may not seal; if too tight, the insulation can crack.
Card 4
Question: Why are pressurized magnetos used on most reciprocating-engine aircraft that fly at high altitudes?
Answer: Pressurized air is a better insulator than less dense air, preventing high-voltage arcing in the distributor that could cause vibration and power loss
Card 5
Question: What is meant by the E-gap in magneto timing?
Answer: The E-gap angle is when the rotating magnet is positioned so primary current is greatest; breaker points open when the magnet is in this E-gap positio
Card 6
Question: What is the function of an impulse coupling?
Answer: A spring-driven coupling that holds the magnet during start until after top center, then releases it so the spring spins the magnet fast to produce a
Card 7
Question: What kind of gauge should be used to measure the electrode gap in aircraft spark plugs?
Answer: A round wire gauge.
Card 8
Question: How many igniters are used in most turbine engines?
Answer: (Content provided did not specify a number.)
Card 9
Question: What type of ignition system is used on most turbine engines?
Answer: High-intensity, intermittent-duty, capacitor discharge ignition systems.
Card 10
Question: What are the two types of ignition systems used in turbine engines?
Answer: High-voltage systems and low-voltage systems.