How Auxiliary Power Unit Works | Part 2 : Power

Aircraft type.
* Boeing 777-300ER

APU engine.
* Honeywell 331-500

Aircraft systems explained.
* APU generator system
* APU bleed air system
* Aircraft Pneumatic system
* Electrical load management system

Major components covered.
* power distribution panel, APU engine, air inlet duct, APU controller, AC generator, APU generator controller unit, air supply cabin pressure controller and transformer rectifier unit.
* Load compressor, accessory gearbox, fuel pump, IGV actuator, inlet guide vanes, isolation valves, air conditioning packs, APU shutoff valve, check valve, ring gear and sector gear.

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

Background music used in the video.
* Go big or go home (Filmora stock library)

[johnlinwoodgriffin]

I loved the transition to your engine-series background music when the animation shifted temporarily to the left engine start. I appreciate how you’re putting a lot of thought into the structure and flow of these videos!

[paulbush]

So much engineering ingenuity is taken for granted in our daily lives. These videos shed light on how science and engineering provide the quality of life that we enjoy.

[SAR-uqvv]

Another spectacular video, the quality of the video associated with the description of the system is brilliant. I can say that it enriches and facilitates learning far beyond the airplane manual.

[davidcwell]

as a jet engine mechanic this is amazing how you simplified how everything works I should this video to my kids and godson so they could understand how important science and a good education is. I've loved my job since day 1- 21 years later I still love it.

[trolltube]

The background music during engine startup is amplifying the power and strength of the b777 engine.

[michaelhoffmann]

This is amazing. I felt like I should be taking notes, as there would be an exam tomorrow! This is drinking from a firehose level, nothing dumbed down for layman consumption.

[MarcPagan]

From a pilot, thanks for such well done research, and world class presentation.

If the same people who did this presentation, taught my aircraft transition class/ground school,
...learning the aircraft systems during my one month stuck in a classroom would have been much more enjoyable :)
... and efficient, with regards to learning, and command of the information.

[Wadethewallaby]

Oh my gosh, I’ve learned so much! I’m becoming more smarter each time. I learn something small. My brain is expanding!

[ZozoTravel]

Extremely amazing & informative video, thank you. 🙂

[sdas]

Excellent video. Learned a lot about apu.

[RounakKushwaha]

I can't even fathom how many hours went behind making it

[hamzazarhoudy]

Special thanks to you for your amazing explanation .

[TheSakzzz]

5:26 .. Thats why the cabin cooling fans go silent when the engine is being started! Always wondered that.

[jakeeddy]

Remarkable production! Great job!

If I could ask for anything more, i would request additional data. Voltages, amps available from APU and main engines. Even some PSI info on the bleed air / starting systems. This could only make your great video better.

[PitchrdWingbk]

It's all very good, however there a bit of information left out at around 6:00 minutes - beginning at around 05:30 or a few seconds later maybe - the process of starting the engine with the air starter at the engine itself. The graphics are there, but there is no verbal description. So I don't know if the compressed air from the APU is driving the engine start process through what looks like the engine PTO? I'm not a mechanic so I don't know. That said, still seems to be very good information overall.

[jaiyp]

love your video, wait to watch part 3.

[marcoacerbi]

Bravi! Video perfetti! Peccato che non sono parlati in italiano

[discoverlight]

Amazing and spot on animation, I just have a question doesn’t the right engine gets started up with the bleed air from the left engine?

[daviddeam]

Wow! Super Graphical Schematics on Everything, almost.

[johnreylc]

Is it from engine 1 bleed to engine 2??? Or that's the way by 777 to start engine 2 from APU?