5-10 Accessory, Starter, and Ignition Systems SQ

  1. What is the start sequence?
    Compressor rpm, ignition, fuel
  2. What are the different types of starters?
    DC electric motor and air turbine rapidly
  3. Which starter is commonly used on smaller gas generator engines?
    DC electric motor
  4. What are some uses for compressor discharge air?
    To drive accessories, air conditioning and cabin pressurization
  5. Where would you find the hottest air: the high or low pressure compressor?
    High pressure compressor
  6. In a dual spool axial flow engine, which compressor would provide bleed air for anti-ice protection?
    High pressure compressor
  7. What are some mechanically-driven accessories?
    Generators, alternators and pumps
  8. Why do you want the starter to remain engaged after you’ve reached self accelerating speed?
    To decrease the potential of an abnormal start by reaching normal idle rpm
  9. What is the most common type of large gas generator starter?
    Air turbine starter
  10. How does an air turbine starter work?
    A small, geared, air turbine motor attached to the accessory drive gearbox that turns the accessory drive shaft and rotates the compressor
  11. What type of ignitor plugs are used in gas turbine engine ignition systems?
    Annular-gap and constrained-gap
  12. What causes the flame to spread between combustion chambers in can or canannular designs?
    Flame propagation tubes
  13. How many ignitor plugs does each engine utilize?
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5-10 Accessory, Starter, and Ignition Systems SQ
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