How Auxiliary Power Units Work | Part 1 : Starting

Aircraft type.
* Boeing 777-300ER

APU engine.
* Honeywell 331-500

Aircraft systems explained
* Auxiliary power unit
* Electrical load management system

Major components covered.
* Main and APU battery, power distribution panel, APU engine, air inlet duct, inlet door, apu dc pump, electric actuator, fuel cluster, ignition unit, igniter plug and APU controller.
* Reverse flow annular combustor, centrifugal compressor, axial flow turbine, swirler, fuel nozzle, accessory gearbox, electric starter, pawl clutch mechanism, impeller, diffuser, stator, rotor, exhaust duct and fuel manifolds.

Software's used for making the video.
* Blender 3.6 and Filmora 10

Background music used in the video.
* (Filmora stock library)