Block 2: Powerplant-B. Engines Flashcards
What type of engine is used in the F/A-18E/F?
The F414-GE-400 engine.
What type of engine is used in the F/A-18A-D?
Either F404-GE-400 or F404-GE-402 engine.
Describe the F/A-18 engine.
The engine is a low bypass, axial flow, dual-spool turbofan engine of modular construction with afterburner.
Explain the ignition system.
Ignition system is an automatic, intermittent duty, AC powered, capacitor discharge system.
Explain the ignition system circuitry.
Ignition system circuitry is self-contained on the engine, requiring no aircraft electrical power for operation.
How long does the ignition system stay energized?
Until N2 rpm is 54% or greater or the throttle is retarded below idle.
What is the ignition system made up of?
An alternator, FADEC or ECA, engine fuel control, ignition exciter, main igniter, AB igniter, AB flame sensor, two fan speed transmitters and thermocouple harnesses.
Explain the lubrication system.
It’s accomplished through a self-contained recirculation, dry sump requiring no external connections or inputs. It also provides lubrication/cooling to the required bearings and gears.
VEN
Variable Exhaust Nozzle
Explain the VEN system.
It’s a cam and link-positioned hinged-flap, convergent-divergent nozzle, mounted to the aft end of the afterburner case.
Explain how the VEN system is operated.
It’s hydraulically (fuel) operated, electrically controlled series of actuators, synchronizing shafts, links, flaps, seals, providing a controlled throat area (A8) for the exhaust gasses from the turbine
How long does the ignition system stay energized?
Until N2 rpm is 54% or greater or the throttle is retarded below idle.
What is the ignition system made up of?
An alternator, FADEC or ECA, engine fuel control, ignition exciter, main igniter, AB igniter, AB flame sensor, two fan speed transmitters and thermocouple harnesses.
Explain the lubrication system.
It’s accomplished through a self-contained recirculation, dry sump requiring no external connections or inputs. It also provides lubrication/cooling to the required bearings and gears.
VEN
Variable Exhaust Nozzle
