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Questions and Answers
What is the purpose of the High Energy Ignition Unit (HEIU) in a gas turbine engine system?
What is the purpose of the High Energy Ignition Unit (HEIU) in a gas turbine engine system?
- To regulate power from the battery bus
- To dissipate energy as high-voltage, high-amperage discharge across the igniter plug (correct)
- To control the voltage supply from the engine starting system
- To store electrical energy until a predetermined value is reached
Which type of ignition system receives power from the aircraft AC bus?
Which type of ignition system receives power from the aircraft AC bus?
- High tension current system (correct)
- Intermittent duty cycle system
- Continuous duty cycle system
- Low tension current system
What does the term 'duty cycle' refer to in the context of ignition systems?
What does the term 'duty cycle' refer to in the context of ignition systems?
- The type of voltage supply controlled by the engine starting system
- The time limit placed on the operation of the ignition system (correct)
- The dissipation of electrical energy in the HEIU
- The position of igniter plugs within a combustion chamber
Where does a low tension current system receive its power from in a gas turbine engine?
Where does a low tension current system receive its power from in a gas turbine engine?
What are the two common types of gas turbine ignition systems mentioned in the text?
What are the two common types of gas turbine ignition systems mentioned in the text?
How do igniter plug types vary between engine designs?
How do igniter plug types vary between engine designs?
What is the purpose of a continuous duty cycle ignition system in an aircraft?
What is the purpose of a continuous duty cycle ignition system in an aircraft?
In what situations would aircrew typically select just one igniter plug?
In what situations would aircrew typically select just one igniter plug?
What is a common feature of both AC and DC igniter systems?
What is a common feature of both AC and DC igniter systems?
Why are gas turbine engines typically equipped with a dual high energy ignition system?
Why are gas turbine engines typically equipped with a dual high energy ignition system?
Which component of an ignition system is responsible for controlling the flow of high energy current to the igniter plugs?
Which component of an ignition system is responsible for controlling the flow of high energy current to the igniter plugs?
What is the main difference between a DC bus and an AC bus ignition circuit breaker?
What is the main difference between a DC bus and an AC bus ignition circuit breaker?
What is the duty cycle of the ignition system based on the information provided?
What is the duty cycle of the ignition system based on the information provided?
At what RPM range does the ignition system operate continuously according to the text?
At what RPM range does the ignition system operate continuously according to the text?
What happens when the engine speed goes above 65% based on the information provided?
What happens when the engine speed goes above 65% based on the information provided?
What component connects the HEIUs to the igniter plugs according to the passage?
What component connects the HEIUs to the igniter plugs according to the passage?
Which type of current is used to supply ignition voltage through the high tension ignition harness?
Which type of current is used to supply ignition voltage through the high tension ignition harness?
What does the diode in this figure represent in the context of the ignition system operation above 65% RPM?
What does the diode in this figure represent in the context of the ignition system operation above 65% RPM?
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