KZhead
Ғылым және технология

How Auxiliary Power Units Work | Part 1 : Starting

Aircraft Science
2023 ж. 20 Жел.
179 256 Рет қаралды
Жүктеу

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)

Пікірлер

  • I'm not in aviation, but I can recognize an excellent graphical and verbal presentation when I see one. Good work!

    @SplashJohn@SplashJohn4 ай бұрын

  • My dad and brothers worked on the industrial piping for the Honeywell plant that rebuilt these in Arizona. The plant did nothing but rebuild these APUs all day long. Awesome video!

    @ryanreedgibson@ryanreedgibson4 ай бұрын

  • o man I remember the days on the flight line when I was in the Airforce having to listen to those screeching loud APU's 8-12 hrs a day, Yes I had (double) hearing protection. Its louder than the turbofan engine is (at idle). We used the APU to generate electrical & hydraulic pressure to load the gun system with ammo while at the same time removing the spent shell casings. There was a machine to connect to externally for electricity and hydraulics, it was taught to us in practice. But in real world use, it was never used, well at least not at the base I was at.

    @thabg007@thabg0074 ай бұрын

    • A-10?

      @po1ly414@po1ly4144 ай бұрын

    • @@po1ly414 yea, how did you know?

      @thabg007@thabg0074 ай бұрын

    • A-10. One of the few that keeps its empties.

      @aarond.8831@aarond.88314 ай бұрын

    • Security forces and guarded c17’s and kc-135 refueler. Never knew wtf was screeching every damn day until I started getting into flight sims. It all made sense lol. Ear pro did nothing 😂

      @grumpyBSTRD@grumpyBSTRD4 ай бұрын

    • Military aviation equipment is exempt from federal emissions, noise and fuel efficiency stds, so they are usually loud, smoky and toxic. Commercial is not.

      @Greatdome99@Greatdome993 ай бұрын

  • I work on 777s every day and still found this presentation informative and well made! Great job!

    @SimonButler@SimonButler4 ай бұрын

  • Masterpiece of engineering. Like pretty much everything in aviation.

    @BlackFoxFalcon@BlackFoxFalcon4 ай бұрын

  • As usual, awesome animation and detailed. Keep going, we need such videos in our field for better understanding.

    @CHOXON2CHOXOFF@CHOXON2CHOXOFF4 ай бұрын

    • Thanks, will do!

      @AircraftScience@AircraftScience4 ай бұрын

  • I'm studying this to help my fiancé answer a test at work... omg this is so complicated lol the engineering behind airplanes is just insane... amazing

    @kellyfernandx@kellyfernandx3 ай бұрын

  • this is a damn good animation for those that are visual learners. thank you aircraft science for taking the time to make this

    @DavK637@DavK6373 ай бұрын

  • Now this. Is improvement! Amazingly done as always. From GE90 engine start and now goin' to the APU! Amazing and great! Thank you for this. As an aircraft mechanic with this type training. YOU MADE EXPLAINING. Easy. Always here to watch and see you go!

    @grantnaval4519@grantnaval45194 ай бұрын

    • Thanks a lot!

      @AircraftScience@AircraftScience4 ай бұрын

  • crazy quality I’ve ever seen about APU

    @user-mv6hy3pe4s@user-mv6hy3pe4s4 ай бұрын

  • Great video. Interesting to see the APU follow the traditional British jet layout.

    @gepset@gepset3 ай бұрын

  • This was excellent. Your videos are getting better with every release. Thanks heaps!

    @DropBear69@DropBear694 ай бұрын

    • My pleasure!

      @AircraftScience@AircraftScience4 ай бұрын

  • Heading been a ramp agent for a certain amount of time for a regional carrier, who used CRJ200's that had the APU exhaust at ground level, you had to walk quickly past all the heat if you were walking back there. (However in frigid temps it was a nice heat source outdoors lol)

    @demal1010@demal10104 ай бұрын

  • i am probably never going to need this knowledge, but it was very well broken down and presented, great job

    @oOSpecialProskillsOo@oOSpecialProskillsOo3 ай бұрын

  • It’s absolute and beautifully crafted animation and perfectly rendered here. Tombs up.

    @eneebarry6764@eneebarry67644 ай бұрын

  • I've always wondered where the air intake for an APU was. Very cool!

    @flapjack413@flapjack4132 ай бұрын

  • Best visual video & best explanation ever!! ❤️❤️❤️

    @Humshkin@Humshkin4 ай бұрын

  • The apu is awesome Its more than just a starter Its backup power and Emergency pneumatic! Its nice

    @seantaggart7382@seantaggart73824 ай бұрын

  • This will be very useful for a project I'm working on in a game I play.

    @11snakePlayz@11snakePlayz4 ай бұрын

  • Great presentation! can't wait for part 2

    @garyroachester1500@garyroachester15004 ай бұрын

  • Absolutely brilliant, I really like and appreciate your job. Thank you. Always looking forward for more of your videos.

    @ccacrislan@ccacrislan4 ай бұрын

    • Many thanks!

      @AircraftScience@AircraftScience4 ай бұрын

  • Absolute GREAT.

    @Magan-lg4bc@Magan-lg4bc3 ай бұрын

  • Dont stop please. Thanks!

    @john.enospahitamos3596@john.enospahitamos35963 ай бұрын

  • Very nicely explained ❤

    @vishwajeet7806@vishwajeet780619 күн бұрын

  • brilliant content

    @formatogrande397@formatogrande3974 ай бұрын

  • it's good job, wonderful,brilliant

    @user-yf5td1zf6s@user-yf5td1zf6s12 күн бұрын

  • Awesome video! Better than most CBTs

    @lunganzimande8056@lunganzimande80563 ай бұрын

  • Excellent👌❤

    @sssaeedssahz.1434@sssaeedssahz.14344 ай бұрын

  • That was very well done.

    @southernpilot@southernpilot3 ай бұрын

  • Very good animation.. waiting for part 2, thanks

    @lmoraz@lmoraz2 ай бұрын

  • Thanks ! Useful video ! I guess it took you thousands of hours hard work!

    @zlatimirzdravkov8940@zlatimirzdravkov8940Ай бұрын

  • Superb video!

    @artysanmobile@artysanmobile4 ай бұрын

  • The dark shadows with the black background make the details difficult to see. KZhead animators like Jared Owen and AiTelly include more contrasting shades and colors to make the details more visible. Nice work. Your effort really shows.

    @jepleas9159@jepleas91594 ай бұрын

  • This channel is amazing.

    @stachowi@stachowi4 ай бұрын

  • Brilliant❤

    @n.s.shankar@n.s.shankar4 ай бұрын

  • The Video: Informative, technical, intresting The Music: Battlefield Butt Rock/ Command & Conquer

    @SticksTheFox@SticksTheFox3 ай бұрын

  • Your videos are bonkers man !! Love them ❤

    @JanV29@JanV294 ай бұрын

    • Thank you!

      @AircraftScience@AircraftScience4 ай бұрын

  • Would have been nice to see the pneumatic start option as well as the electric. It's not available till an engine or exterior air supply is running, so i hope it will be covered in an upcoming video.

    @demal1010@demal10104 ай бұрын

    • I will cover the pneumatic start system in the APU bleed air section of the series.

      @AircraftScience@AircraftScience4 ай бұрын

  • Awesome Video 😊

    @richardbriansmith8562@richardbriansmith85623 ай бұрын

  • Fantastic graphics, excellent explanation. Superbly done. Better than the Boeing one. Teach them something.

    @alexkazzeo6208@alexkazzeo62084 ай бұрын

  • (0:23) Oooo... So shiny! 😉😎

    @CybershamanX@CybershamanX2 ай бұрын

  • Remember that guy that asked you to make this a year ago?

    @aviationnmaps@aviationnmaps4 ай бұрын

    • Yes, thanks again for suggesting this topic.

      @AircraftScience@AircraftScience4 ай бұрын

  • Awsome bro....thank you for such videos

    @dilandias4018@dilandias40183 ай бұрын

    • My pleasure!

      @AircraftScience@AircraftScience3 ай бұрын

  • Is the alternator permanently geared in or does it have an electric clutch to engage it once the APU gets up to speed? Presumably the APU drives a hydraulic pump as well. Does that have a clutch? I'm just wondering if the starter motor has to spin all that stuff or is all of that disengaged during starting?

    @dalemanolas5994@dalemanolas59943 ай бұрын

  • Waiting for part 2!

    @chitralisontakke7186@chitralisontakke71862 ай бұрын

  • Sooo good

    @RounakKushwaha@RounakKushwaha4 ай бұрын

  • Thanks. Question: Does the pawl clutch run the ratchets continuously after starting or is there some sort of disengagement mechanism once the APU is up to speed? Seems that there would be a lot of wear otherwise.

    @matthaxx7137@matthaxx71374 ай бұрын

    • The clutch disengages once the motor stops at 50% RPM. As the engine speed increases, the pawls move outward against their spring tension due to centrifugal force. This eliminates contact and thereby reduces wear.

      @AircraftScience@AircraftScience4 ай бұрын

  • I love the graphics

    @BobSmith1980.@BobSmith1980.3 ай бұрын

  • Are there any "APU" engines that might be rigged to fly some sort of small aircraft? A means for some hobbiest to get some inexpensive second hand "jet" engines.

    @russchadwell@russchadwell3 ай бұрын

  • Thank you very much sir.....🙏🙏🙏

    @maheshanura5413@maheshanura54134 ай бұрын

    • Most welcome

      @AircraftScience@AircraftScience4 ай бұрын

  • Where is part 2? This is so good thank you!

    @lilawaffel186@lilawaffel1863 ай бұрын

    • I'm working on it!

      @AircraftScience@AircraftScience3 ай бұрын

  • So the 777 apu has a pneumatic start option. Interesting. Makes sense if it needs to crank at altitude, and you want to conserve bat power.

    @davecrupel2817@davecrupel28173 ай бұрын

  • Great, ending this interesting episode without telling me HOW electricity and hydrolic pressure is generated... I assume it is coupled somewhere.

    @r.robbie7918@r.robbie79184 ай бұрын

  • You Really Haft To Be A Genius To Be A Pilot And Designer And Innovator Of These Jet Engines I Tip My Hat To Them

    @troybowen3024@troybowen30244 ай бұрын

  • 👌

    @suhailummer2697@suhailummer26974 ай бұрын

  • ❤

    @erdum@erdum4 ай бұрын

  • I'm very amazed with your animation videos, it really helps to fill my knowledge. But there's something I'm wondering about the engine, how does the fuel metering system work?

    @jaiyp77@jaiyp774 ай бұрын

    • Hi, I have plans to cover this topic in the APU performance (part 3) video.

      @AircraftScience@AircraftScience4 ай бұрын

    • @@AircraftScience Thank you very much

      @jaiyp77@jaiyp774 ай бұрын

  • This complexity is the reason there are no competitors to Boeing and Airbus. Such a colossal undertaking building a single one of these aircraft.

    @motionsick@motionsick2 ай бұрын

  • I remember the noise of C130B’s GTC cranking up…. very loud…

    @user-el9mn9fi8e@user-el9mn9fi8e3 ай бұрын

  • Hello, I can translate your video?

    @abdulla9042@abdulla90424 ай бұрын

  • Nice education video ❤! How about pneumatic start! Never use on line ! Ha!😂

    @user-pg5px6qf7z@user-pg5px6qf7z4 ай бұрын

  • Ok this video ends where the apu is running. You forgot to tell how is the electricity made. Where is the “auxiliary power” made?

    @randygravel2057@randygravel20572 ай бұрын

  • I always thought there is an internal combustion engine there, a motor at work there. O, a jet engine!!! Nicely explained. What about thrusts it generates?

    @orunabho@orunabho4 ай бұрын

    • It is negligible. They shut it off after engine start.

      @justing42@justing424 ай бұрын

  • Can you do for airbus apu

    @musiegirma2728@musiegirma27283 ай бұрын

  • When will part two be done?

    @ryanreedgibson@ryanreedgibson4 ай бұрын

    • Hopefully, late January.

      @AircraftScience@AircraftScience4 ай бұрын

  • Please make video on APU bearings and seals..

    @mubashirghani9344@mubashirghani9344Ай бұрын

    • Noted!

      @AircraftScience@AircraftScienceАй бұрын

  • Small turbine works behind produce small amount of electricity and A/c to cabin and also bleed air to start engine

    @udayakumar5348@udayakumar53483 ай бұрын

  • What software did u use bro

    @WhyHow-vn6fo@WhyHow-vn6foАй бұрын

    • Blender.

      @AircraftScience@AircraftScienceАй бұрын

    • Tq for ur reply and please upload some videos about modelling

      @WhyHow-vn6fo@WhyHow-vn6foАй бұрын

  • Nice presentation but where is the generator part of the APU?

    @rickybrazzell7348@rickybrazzell73482 ай бұрын

    • Coming soon!

      @AircraftScience@AircraftScience2 ай бұрын

  • When will come next part video

    @josephjeno6709@josephjeno67093 ай бұрын

  • Always wanted to find a timed-out, old apu and put it in an old truck. Power an electric motor. Wouldn't be very efficient but fuck would it be cool.

    @juggsauce@juggsauce3 ай бұрын

  • We want a video of how to run the engine via the APU

    @myheart-ok4ie@myheart-ok4ie3 ай бұрын

    • The main engine start will be covered in the second part of the series.

      @AircraftScience@AircraftScience3 ай бұрын

  • Part 2???

    @agungdwif@agungdwif3 ай бұрын

  • And apu with an air starter as an option ? That’s a wrong stament. The igniters work before fuel is added. Fuel nozzles are mostly duplex. Meaning they have two stage function for starting and normal operations, you can’t dump all fuel less the 40 %.

    @MonkPetite@MonkPetite4 ай бұрын

  • Nice video. However, it's kind of too slow with long pauses, it would be way better if it were more dynamic. Also is it a human narrator or AI? A little more emotion would not hurt either 😊

    @LezamaDamian@LezamaDamian4 ай бұрын

    • Noted!

      @AircraftScience@AircraftScience4 ай бұрын

  • That plane looks very pimped

    @Takeitlightly6@Takeitlightly6Ай бұрын

  • turbine blades should be curved opposite to what is shown on the video . The angle is ok, but the curvature shape is not

    @apivovarov2@apivovarov24 ай бұрын

  • Very dark. Nothing visible.

    @Lx-photos@Lx-photos7 күн бұрын

  • Landing gear pls

    @tumurbaatarchinzorig273@tumurbaatarchinzorig27319 күн бұрын

    • The next series will be on landing gear.

      @AircraftScience@AircraftScience17 күн бұрын

    • @@AircraftScience Thank you so much!

      @tumurbaatarchinzorig273@tumurbaatarchinzorig27317 күн бұрын

  • Robot voice.

    @-fuk57@-fuk57Ай бұрын

  • 😮

    @RounakKushwaha@RounakKushwaha4 ай бұрын

  • Get rid of the black background. It will increase the contrast and makes your diagrams more visible....

    @keitha.9788@keitha.97882 ай бұрын

  • Thank you, come again!

    @lordpickle8424@lordpickle84243 ай бұрын

  • You don't really think about the fact there's a 3rd engine on a twin engine aircraft.

    @jeffy210@jeffy2104 ай бұрын

    • Actually 4 if you also take the rat into account

      @lilsnowycaraudio@lilsnowycaraudio4 ай бұрын

    • @@lilsnowycaraudiothe rat is a pump

      @justing42@justing424 ай бұрын

  • This is what I do with APUs - GTCP 36-55-c from an AH 64 and the M1A1 gen set from the Air Force for the Jet Ecec kzhead.info/sun/mbapYtl5kImXknk/bejne.html

    @user-jq2rf4nf3o@user-jq2rf4nf3o2 ай бұрын

  • Nice to get an authoritative presentation for a change, instead of the usual tedious dumb-down BBC-style documentary where every sentence has to contain a word like enormous, massive, vast, prodigious, tremendous, monumental, colossal, immense, gigantic, mammoth, stupendous, etc, etc, etc...

    @MrPLC999@MrPLC9993 ай бұрын

    • Good point. I get so weary of the gearhead shows where every host has to act like he has just snorted 20 lines of coke and meth just to make the presentation sound “exciting”.

      @thardyryll@thardyryllАй бұрын

  • that was a REALLY well done video. I'm much more likely to downvote a bad video than upvote a good one but I had nothing bad to say about this other than I'm sad the next one isn't out yet.

    @zachansen8293@zachansen82933 ай бұрын

  • Get a truck mechanic to sit in class with paper notes version of this And similar to this, gas-turbine notes And also turbo-fan notes and turbo-prop notes and turbo-shaft notes Tell him to treat 28vDC as 24v truck battery. Impeller start as air-brakes of truck. Cascading battery to air tank to brakes to impeller to battery then battery and impeller the thingy. The thingy should impeller flow lub and fuel by crank and the battery should blow the bloody thing up. Redraw something over the weekend by combining 2 shafts like a cockster turboshaft into a 2 shaft turbo prop and use air around duct-in-duct to cool itself, vanes support. 2 shaft can exhaust thrust straight and rotor big. See what happens.

    @engchoontan8483@engchoontan84834 ай бұрын

    • Cocksters use wire mesh covers instead of stators and no chicken-chop

      @engchoontan8483@engchoontan84834 ай бұрын

    • Double shaft designs of turbo prop and turbo shaft allows intake to be almost anywhere and angle, same for exhaust and resultant thrust and also shaft. 3 items put almost anywhere and almost any angle. Terminology of variable geometry is expensive. Same for variable pitch and variable thrust vector (TVC - thrust vector control) Life hack = anti name-dropping, anti brand-dropping, anti deep-meaning, anti fancy wording, anti university terminology... Cross discipline, cross industry, ... Cheaper

      @engchoontan8483@engchoontan84834 ай бұрын

  • All that without even selecting Start!

    @danko6582@danko65823 ай бұрын

  • buuuum

    @nikolamilenkovic9586@nikolamilenkovic95864 ай бұрын

  • Graphics far too dark. it spoils a good video.

    @palaboran2077@palaboran20774 ай бұрын

  • ❤

    @shenghan9385@shenghan9385Ай бұрын
KZhead