KZhead

Understanding How an Aircraft's Jet Engine Starts! A look at the Start Sequence of a Turbofan Engine

JxJ AVIATION
2020 ж. 29 Мау.
737 378 Рет қаралды
Жүктеу

Hello. In this video we consider a turbofan engine on a commercial aircraft. These engines are started through a set of switches in the cockpit. The start sequence of the engine, gets initiated when the air from a high pressure air source enters the starter unit in the accessory gear box.
In this video we see and understand what is start sequence by looking at the different components on the engine and how each component contributes to the engine start.
hope you enjoy. thank you.
Please Watch and Subscribe for more videos!

Пікірлер

  • One important correction, N1 rotation begins before fuel is introduced. When the N2 shaft is spun by the starter, it will suck air through the engine, which will turn the N1 shaft at a low speed. This rotation must be confirmed before fuel is introduced, as lack of N1 rotation could indicate a seized engine.

    @KingdaToro@KingdaToro3 жыл бұрын

    • Thank you for the information!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

    • @@JxJAVIATION Thank you for jet engine start steps.

      @muzzafariqbal4648@muzzafariqbal4648 Жыл бұрын

    • thank you very much

      @Echo_Lima@Echo_Lima Жыл бұрын

    • Thank you, I have always wondered about that. Thanks for explaining.

      @Heisenberg2K@Heisenberg2K Жыл бұрын

    • Good explanation, I was wondering how N1 starts, now I know...

      @iulianstoican1119@iulianstoican1119 Жыл бұрын

  • Where has this video been my whole life? I've watched so many videos just to understand this but they all deviated. Thanks a lot. Good video.

    @foliviemccarthy8906@foliviemccarthy89063 жыл бұрын

    • You're very welcome! Please do Watch other videos on my channel as well.

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

    • You should also watch this one. It is also as good kzhead.info/sun/et6hlNyLqqGKY58/bejne.html

      @Sanctustormentor@Sanctustormentor3 жыл бұрын

  • I’m an A+P who no longer works in the industry so I really appreciated that you did not call this a jet engine but a turbo fan. Most high bypass engines have a twisted arrow on the inlet so the crew can verify the correct rotation before initiating ignition and fuel. Thanks again!

    @powerwagon3731@powerwagon3731 Жыл бұрын

    • You are Welcome! Check out my other videos as well!

      @JxJAVIATION@JxJAVIATION Жыл бұрын

    • I am confused. This isnt a jet engine?

      @majestikstyle@majestikstyle7 күн бұрын

    • @@majestikstyle It’s not a true jet engine It’s a turbine which uses a series of compressor blades mounted on wheels in the convergent duct thus compressing the air. After which fuel and ignition are introduced in the hot section driving another series of blades in the divergent duct mounted to a common shaft that also drives the compressor section. A high by pass fan is also used for thrust around engine case . A true jet is much simpler in design.

      @powerwagon3731@powerwagon37316 күн бұрын

  • You nailed it! This is so good I chose to use it in my classroom of aircraft mechanics students.

    @clarkscarborough959@clarkscarborough9593 жыл бұрын

    • WOW! Thank You. A PLEASURE!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Thanks so much for the info, nobody out there explaining “how a turbine works” shows how the turbine starts or accelerate. Thanks again ❤️

    @luisg7109@luisg71092 жыл бұрын

    • You are Welcome! Check out my other videos as well!

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

  • Thank you. As a flight sim enthusiast I really wanted to understand the N2 importance initially and why N1 is important later for most of the flight. You nailed it.

    @davey6693@davey66933 жыл бұрын

    • Thank you mate!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

    • Think of it this way: N1 is your thrust, and N2 powers your systems. The N1 shaft has many more turbine stages, in order to extract as much energy as possible from the jet exhaust and use it to run the fan. That's where most of your thrust comes from. The N2 compressor gives you bleed air, which runs your AC, anti-ice, and engine starters. The gearbox linked to the N2 shaft runs a generator and a hydraulic pump.

      @KingdaToro@KingdaToro Жыл бұрын

  • One of the things I did on pushbacks, before I give the pilots permission to start. I notice the wind. A strong rear wind would turn the fan blades in the opposite direction. If the wind is really strong from the rear, I would alter the angle in order to prevent a hot start.

    @Delta191@Delta1913 жыл бұрын

    • That's very interesting information! thank you! :)

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

    • I want to learn this

      @Charlesrangerover@Charlesrangerover3 жыл бұрын

    • What is a hot start? Very interesting!

      @hugolafhugolaf@hugolafhugolaf Жыл бұрын

    • It’s always refreshing to work with push back crews who have that kind of situational awareness

      @As_A________Commenter@As_A________Commenter Жыл бұрын

    • @@hugolafhugolaf in order to make more power, engines must get hotter. We measure this heat by the temperature of the gasses that are exhausted out of the engine, known as exhaust gas temperature or EGT. During an engine start, the EGT is monitored to not exceed a certain value before the engine is started and stabilized. If it does exceed this value, that is known as a hot start.

      @As_A________Commenter@As_A________Commenter Жыл бұрын

  • This Video would be WAY BETTER with out the robot voice

    @bmaiceman@bmaiceman3 жыл бұрын

    • Very true. That robot voice sucks.

      @stankakol5195@stankakol51953 жыл бұрын

    • True

      @jevanmcfarlane16@jevanmcfarlane16 Жыл бұрын

    • False

      @captainemerald7308@captainemerald7308 Жыл бұрын

    • Forreal, if you take pride in what you do you should be confident in speaking your knowledge

      @Mongoliantreecow@Mongoliantreecow Жыл бұрын

    • He doesn’t give a $hit because he’s too lazy to bother.

      @outerrealm@outerrealm Жыл бұрын

  • Thanks, I dont know why so many videos skip how to initially get the turbine spinning, that's what I needed to know.

    @lordfrz9339@lordfrz93393 жыл бұрын

    • You are Welcome!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • 2:59 finally a video explaining what started the engine! Most videos just start with "air is sucked in" lol

    @king0vdarkness@king0vdarkness2 жыл бұрын

    • Cool! :)

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

  • This is the most crisp and on the point explanation of turbofan engine start i have ever watched. Thanks a ton for your work. Liked and subscribed.

    @besiryasar4401@besiryasar44013 жыл бұрын

    • Thank you so much! :)

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

    • With a shit computer generated voice ? WOW

      @gowdsake7103@gowdsake7103 Жыл бұрын

  • There’s always a portion of magic in the procedure nobody has ever fathomed

    @markfosseth8047@markfosseth80479 ай бұрын

    • That is the beauty of it!

      @JxJAVIATION@JxJAVIATION9 ай бұрын

  • Thank you very much for sharing this information, you took away the darkness of my ignorance.

    @fernandovillanueva2429@fernandovillanueva24293 жыл бұрын

    • Glad it was helpful!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • You're videos are so educational thank you for sharing!

    @yhan4437@yhan44373 жыл бұрын

    • thank you for watching!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Beautifully explained... Looking forward for more videos!!! 💯

    @TacticalDoge101@TacticalDoge1013 жыл бұрын

    • Thank You so much! Please do share the videos! and Watch my other videos as well!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

    • I have to agree. Your clear and easy-to-understand explanations together with the fantastic animations are first rate! Well done and thank you.

      @jasminderpinder@jasminderpinder2 жыл бұрын

  • AWESOME video The diagrams are very easy to understand and the slow-rate voice really helps to follow the explanation. Thank you

    @AmbrosioGar@AmbrosioGar3 жыл бұрын

    • You are Welcome!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Really great explanantion. Thank you. My lecturer insist us to watch this vid, does not have any regret at all. 🔥🔥🔥

    @sitisarahabdulrahman@sitisarahabdulrahman3 жыл бұрын

    • You are welcome! This has definitely made my day today. Thank you. Do watch my other videos as well and please share. :)

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • This video just solved one of the biggest doubts i had as aplane enthusiats. Thank you very much, and you've gained a new subscriber :)

    @brusolainaraja998@brusolainaraja9982 жыл бұрын

    • Thank You so much and WELCOME! Check out some of my other videos as well!

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

    • What were you doubting if I may ask

      @lewismuange3786@lewismuange37862 жыл бұрын

    • @@lewismuange3786 Well I understand why many people are wondering what is right, as I've seen multiple TV shows telling it wrong. I even remember the startup sequence being described as "compressed air pushing down the pistons" in "Ultimate Airport Dubai". Which is of course laughable.

      @CheapBastard1988@CheapBastard1988 Жыл бұрын

  • very neat, concise and clear presentation

    @gettheresoon@gettheresoon3 жыл бұрын

    • Thank You!!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Nice work! Very helpful!

    @manuellozano5567@manuellozano55673 жыл бұрын

  • Oh thank you so much for this info.

    @samugote@samugote3 жыл бұрын

  • This was a huge help, best one I've seen. Well done!

    @tinker-bell6183@tinker-bell6183 Жыл бұрын

    • Thank you so much. Do check out my other videos as well!

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • GREAT PRESENTION. I enjoyed the video fully. Thanks for sharing ✈️🛫

    @slipperybeastaviationfishingsh@slipperybeastaviationfishingsh2 жыл бұрын

    • Thanks for watching! Do Check out my other videos as well!

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

    • Of course

      @aircraftmaintenanceinsider@aircraftmaintenanceinsider2 жыл бұрын

  • Thanks, Stephen Hawking, that was super education!

    @egregiousqueef7781@egregiousqueef77812 жыл бұрын

    • Thank you so much man! Made my day!

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

    • @@JxJAVIATION ... al. EducationAL. But also a super _free_ education, so I guess it kinda fits! I just had to replace a torque converter on a car and there are similarities, that's how I arrived at your video. Plus TheFlightChannel is like super addicting, and also super sad and frustrating Thanks again! I'm all about making days!

      @egregiousqueef7781@egregiousqueef77812 жыл бұрын

    • @@egregiousqueef7781 Great to have you onboard! Check out my other videos as well. As you mentioned its free aviation education! :)

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

  • thanks a lot for this video....crystal clear

    @ragaat@ragaat3 жыл бұрын

    • You are welcome!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Super informative and im looking forward to more videos 🙂

    @Amberlynnslivertit@Amberlynnslivertit3 жыл бұрын

    • Thank You!!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • You are the MAN!! This video is the best ever!

    @latonyamckay2048@latonyamckay20483 жыл бұрын

    • Thank you so much!!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • I'm fascinated with aviation and always learn something new everyday. Thanks 👍

    @emmcee476@emmcee4766 ай бұрын

    • Thank you! Check out my other videos as well!

      @JxJAVIATION@JxJAVIATION5 ай бұрын

  • Sir this video, i like most. Marvelous video. Thank you sir.

    @flywithswarnabha3622@flywithswarnabha36223 жыл бұрын

    • thank you and welcome!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Very straight forward, excellent explanation, thank you! /ATPL student

    @solamigos@solamigos Жыл бұрын

    • Thank you! Check out my other videos as well! Could be useful!

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • Great explanation sir ! It's just mind-blowing awesome...

    @user_1911@user_19112 жыл бұрын

    • Thanks a ton! :)

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

  • Some jet engines now start electrically. On the 787 they have what are called VFSG for Variable Frequency Starter/Generators. The starters are also the generators once the engine runs on it's own.

    @rael5469@rael5469 Жыл бұрын

    • Yes, just focused on the Pneumatic Starter

      @JxJAVIATION@JxJAVIATION Жыл бұрын

    • @@JxJAVIATION Love the video.

      @rael5469@rael5469 Жыл бұрын

    • And each engine has two VFSG's (as does the APU).

      @CheapBastard1988@CheapBastard1988 Жыл бұрын

    • Good point. And most business jets.

      @louvegas1048@louvegas1048 Жыл бұрын

  • Superb demonstration

    @yapacreation@yapacreation3 жыл бұрын

    • Thank you so much!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • The graphic appears to be a 787. I worked on the 787 Common Motor/Starter Controller, which was the 1st all electric start of an engine of its size; otherwise the information is mostly consistent with other turbine engines I've worked on.

    @localcomediankid9653@localcomediankid96539 ай бұрын

    • On the 787 there is an electric starter, but I was giving an idea about the air starter unit!

      @JxJAVIATION@JxJAVIATION8 ай бұрын

  • Very good explanation 🙏🙏🙏

    @Blueleaves1759@Blueleaves17593 жыл бұрын

  • Thanks good explanation.

    @amiramirgerard2818@amiramirgerard28183 жыл бұрын

    • Thanks for watching!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Very nice explanation, it is easy to understand it. Thanks!

    @Titanium_fighter@Titanium_fighter3 жыл бұрын

    • Glad it was helpful!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Great explanation. Thank you.

    @kissimmeebarcelona@kissimmeebarcelona2 жыл бұрын

    • You are Welcome!

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

  • Impressive, easily understandable

    @SureshKumar-wn5zj@SureshKumar-wn5zj3 жыл бұрын

    • Do watch my other videos as well!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Its 2020 and flight schools still teaching trash. Best way to teach airplane systems is either with real airplane opened or watching videos like this from someone that really knows his stuff.

    @walterneves5978@walterneves59783 жыл бұрын

    • Thank You! It really means a lot!!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Excellent. Complete & concept educate. Thanks 😊

    @mammadbughi3327@mammadbughi3327 Жыл бұрын

    • Most welcome 😊

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • absolutey FANTASTIC! thank you!!

    @LostInSpace175@LostInSpace175 Жыл бұрын

    • You are welcome. Check out my other videos as well

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • The video is so much useful an understandable then others, the voice is robotic or not, it is more important that talks slowly and gives the listener some gap to digest the information, thank you so much for the video

    @Jacke50@Jacke503 жыл бұрын

    • Glad it was helpful!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • As an important point with regards starting a turbo fan engine. The air starter for the engine is fed low pressure high volume air. A popular understandable mistake is that the starter is fed high pressure air. The air pressure is generally around 45 psi. The volume of air supplied is what provides the energy to drive the air starter.

    @colinberneville-claye5768@colinberneville-claye576810 ай бұрын

    • Yes that is a very good point! Thank you for sharing!

      @JxJAVIATION@JxJAVIATION9 ай бұрын

  • I am exciting this video. This is so good I chose to use it in my classroom of aircraft mechanics students

    @user-bk7um4kr5e@user-bk7um4kr5e Жыл бұрын

    • Thank you so much! Do check out some of my other videos as well!

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • The accessory gearbox is like a drive belt on the cars. It drives the fuel pump and the oil pump and the hyrdaulics. It is driven by the Hp turbine. So to drive the Hp turbine itself we can drive this gearbox itself.

    @dranzergigs8333@dranzergigs83333 жыл бұрын

    • That is a good explanation!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Very clear explanation 👍

    @saikumargollapalli7032@saikumargollapalli70323 жыл бұрын

    • Thank You!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Great video.☺️ I just subscribed to ur KZhead channel.☺️

    @joshuahalla.k.a.controlla6333@joshuahalla.k.a.controlla63333 жыл бұрын

  • Thanks for the details 🙏

    @mukeshpatel2703@mukeshpatel2703 Жыл бұрын

    • No problem 👍

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • Thank you for sharing 🤝🏻

    @sonaljadhav4256@sonaljadhav42562 жыл бұрын

    • You are Welcome 👍

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

  • Really great and to the point explanation

    @ajayprakash1194@ajayprakash1194 Жыл бұрын

    • Thank you! Do check out my other videos as well!

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • VERY NICE WAY TO TEACH, IMPRESSIVE THANK YOU SIR FROM PAKISTAN

    @loveforall4202@loveforall42023 жыл бұрын

    • Welcome!! :)

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Your videos are so educational thank you for sharing.....

    @rumindam5505@rumindam55053 жыл бұрын

    • Welcome & Glad you like them! :)

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Great explanation, very helpful

    @fourletter182@fourletter182 Жыл бұрын

    • Glad it was helpful! Check out my other videos as well!

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • Thank you so much! , so informative and short

    @Skyfollow52@Skyfollow5210 ай бұрын

    • You're welcome! Check out my other videos as well!

      @JxJAVIATION@JxJAVIATION10 ай бұрын

  • great video, thanks

    @atakan716@atakan7163 жыл бұрын

    • You are Welcome!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Most find qn answer how jet engine starts.....thanks man

    @DineshKumar-dl6hr@DineshKumar-dl6hr3 жыл бұрын

    • No problem!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Thank you so much for this video

    @geminizel2462@geminizel24622 жыл бұрын

    • You are so welcome!

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

  • Very well explained!

    @Zorroxyz123@Zorroxyz123 Жыл бұрын

    • Thank you!! Do check out my other videos as well!

      @JxJAVIATION@JxJAVIATION11 ай бұрын

  • Splendid job!

    @directbreaks7674@directbreaks76742 жыл бұрын

    • Thanks Mate!

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

  • Thank you.Help me a lot

    @bearz8337@bearz83373 жыл бұрын

    • You are welcome! Please Share and Watch my other videos as well

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Good stuff. Thanks 👌

    @yournamehere7182@yournamehere71823 жыл бұрын

    • Thanks for watching!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • very educative. Thank you Rgards

    @seshachary5580@seshachary5580 Жыл бұрын

    • Glad you enjoyed it

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • Great vid and very informative.

    @jmc2567@jmc2567 Жыл бұрын

    • Thank you!

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • Great video thanks man

    @idiot_in_a_box@idiot_in_a_box3 жыл бұрын

    • Glad you enjoyed it

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Just loved it, so easy now.

    @UKI1@UKI12 жыл бұрын

    • That's great!

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

  • Thank you so much the detailed explanation but can you please provide more information about accessory gear box and its way of operating and stopping mechanism .

    @akshaysahu2051@akshaysahu20513 жыл бұрын

    • You are Welcome! Noted and will do a video on the AGB soon!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Very good explanation...thanks

    @vinu7079@vinu7079 Жыл бұрын

    • Welcome!

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • I m in love with this channel

    @babybaba4809@babybaba48092 жыл бұрын

    • Thank you!

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

  • Very well explained Sir

    @Heisenberg2K@Heisenberg2K Жыл бұрын

    • Thank you! Check out my other videos as well!

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • perfect animation :) love from Pakistan

    @Austria354@Austria3542 жыл бұрын

    • Thanks man! Love from India! :)

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

  • The _shaft_ from the accessory gearbox does not disengage from the N2. The gears in the starter unit disengage from the shaft. The shaft is still required to drive the accessories.

    @ImperrfectStranger@ImperrfectStranger Жыл бұрын

    • Did some research: The shaft which drives the accessories is separate from the shaft that is used to start the engine.

      @JxJAVIATION@JxJAVIATION Жыл бұрын

    • @@JxJAVIATION Engine type? The N2 (or N3) shaft drives the accessory gearbox (permanently attached) on most engines. There are various components attached to the gearbox: Hydraulic pump, EEC power generators, fuel pump, electrical generator and starter motor. i.e. The starter motor is mounted on the gearbox (CF6, RB211, CFM56, etc). You said that "the shaft from the N2 starter unit disengages from the N2 shaft" and the graphic in the video shows the accessory gearbox shaft disengaging from the N2 rotor. What actually happens is that the starter disengages from the gearbox. According to your graphic, all the accessories would stop working.

      @ImperrfectStranger@ImperrfectStranger Жыл бұрын

  • Super explained , sir aabout N1. And N 2 shaft because of I knows one main shaft and one another and well explained about N1 and N2 shaft connections ,

    @maruthikumar2409@maruthikumar24093 жыл бұрын

    • Thanks and welcome! :)

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Superb well explained

    @venkatraman4608@venkatraman46083 жыл бұрын

    • Thank you! Do watch my other videos as well

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Good explanation!!

    @robfrohwein2986@robfrohwein29862 жыл бұрын

    • Thanks!

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

  • What a video thank you so much. I just want to request from you, can you describe accessory gearbox duty basically?

    @giovannigiorgio0@giovannigiorgio03 жыл бұрын

    • You are welcome! Will make a video on it soon!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • The N-1 section just doesn’t start to rotate. The hot exhaust gasses from the combustion section, pass thru the turbine blades, causing the blades to rotate. The now rotating N-1 section does force more air into the compressor section.

    @robertheinkel6225@robertheinkel62259 ай бұрын

    • Yes. That is true!

      @JxJAVIATION@JxJAVIATION8 ай бұрын

  • Thank you,information.

    @edilbertosantana8307@edilbertosantana83073 жыл бұрын

    • You are welcome

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Thanks a lot ... more informative Vedio

    @somireddyatla9986@somireddyatla9986 Жыл бұрын

    • Thank you! Please check out my other videos as well!

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • Awesome 🙏💎 work

    @viral_video_ayana@viral_video_ayana Жыл бұрын

    • Thank you!

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • wow u are amazing, god bless you mr😻

    @sabaalenezi2606@sabaalenezi26062 жыл бұрын

    • Thank you so much 😀

      @JxJAVIATION@JxJAVIATION2 жыл бұрын

  • Can you tell me N1 shaft & N 2 shaft are two independent module which are disengaged during start up or N 1 shaft & N 2 shaft are coupled permanently (single shaft)

    @soundar4270@soundar42703 жыл бұрын

    • N1 and N2 shaft are 2 separate shafts and are not coupled mechanically. The aerodynamic forces cause these shafts to rotate. So basically they are always disengaged mechanically.

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Very. Informative

    @jimboforest4911@jimboforest4911 Жыл бұрын

    • Glad it was helpful!

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • On the C-17 (pw2000 engine) the ignition is left on. It’s turned off as part of the cruise checklist and then turned back on in the descent checklist. This is so that the engine has less chance of flameout at critical stages of flight.

    @l-shizzle8678@l-shizzle867810 ай бұрын

    • That's right. A very good point!

      @JxJAVIATION@JxJAVIATION9 ай бұрын

    • I think that is quite normal for almost all turbofan or jet engined aircraft. Boeing aircraft definitely have it and I think Airbus too.

      @simsch97@simsch977 ай бұрын

  • Nice I understand the others I never got it ,

    @charlesreinhart803@charlesreinhart8033 жыл бұрын

    • that''s great

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Great video ! I’m wondering what happen to the airstarter after the starting cycle is complete ? Do the ground crew take it off ? Isn’t it tricky since the turbine of the airstarter still has a lot of inertia even thaugh it has been disconnected to the N2 shaft ?

    @Binette96@Binette963 жыл бұрын

    • The air starter unit is not removed by the ground crew. This is because, when the aircraft is in flight and the engines were shut down and need to be restarted, the air starter may be required to restart the engine.

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

    • JxJ AVIATION oh so the pressure that flows in the airstarter during flight is enough to start back the engine !? Waw Thanks a lot for your accuracy in your videos and for taking time to share this knowledge with simple terms ! Hope to see you doing well on youtube it is really well deserved !

      @Binette96@Binette963 жыл бұрын

    • ​@@Binette96 Thank you, and Welcome! Please do Watch my other videos and Share the videos as well

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

    • The starter attached to the engine gearbox (about 6" in diameter and about as long) has an overrunning clutch like your car. At some point during the start sequence, the clutch disengages, the starter valve is shut off.

      @Greatdome99@Greatdome993 жыл бұрын

    • @@Greatdome99 You are right Sir.. maybe you are acft engineer or A&P instructor.

      @reymaulion2667@reymaulion26673 жыл бұрын

  • Very informative n Interesting..🛫🛫

    @philiptm1243@philiptm1243 Жыл бұрын

    • Thank You. Check out my other videos as well! and please share!

      @JxJAVIATION@JxJAVIATION Жыл бұрын

    • @@JxJAVIATION Sure..Regards..🛫🛫

      @philiptm1243@philiptm1243 Жыл бұрын

  • Thank you for jet engine start steps. I have a question, burning chamber is at high pressure as compared to compressed air entering it - in flow line and due to generation of product gases. What is the scientific answer? Is it high velocity? Engr. Muzzafar Iqbal.

    @muzzafariqbal4648@muzzafariqbal4648 Жыл бұрын

    • Because of the fuel air mixture being burnt in the combustion chamber the pressure increases.

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • Personally, I Think The Robotic Voice ADDS To Value Of This Long Overdue Explanation.

    @TedGiddingsplanes@TedGiddingsplanes3 жыл бұрын

    • WOW! Thank You!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • Did you miss the sequence of the 3 rubber bands ? Thanks , simple and we'll put. It sure beats 24 volt starting motors and ring gears.

    @bigfish7493@bigfish74933 жыл бұрын

    • I was expecting.. "Next press the switch to release the Hamsters in to the rotating wheel"

      @marcwolf60@marcwolf603 жыл бұрын

  • Hai i just want to clarify that the HP air opens HP valve then it passes through air stater unit before entering to AGB. From AGB it is coupled to N2??

    @premjith.m4213@premjith.m42133 жыл бұрын

    • the HP valve opens and this allows hp air to flow to the air starter unit. the air starter is housed inside the AGB. the coupling is from air starter/agb to N2

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

    • Starter Valve (electrically activated)->Starter->Overrunning clutch->Gearbox->driveshaft to HP spool (via bevel gear). The engine control unit (EEC) controls start sequence of the engine fuel and ignition.

      @Greatdome99@Greatdome993 жыл бұрын

    • @@JxJAVIATION Starter is not housed inside the AGB, it is connected via shaft to gearing inside the AGB.

      @vilttu82@vilttu823 жыл бұрын

  • very GOOD

    @maheralazzawi7814@maheralazzawi78143 жыл бұрын

    • Thank You!

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

  • This not always true. The GEnx and the Rolls-Royce Trent 1000 engines on the 787 is electrically started. The APU provides electrical power and along with the Lithium Ion Batteries directly spin the high pressure spool via the generator-motor mounted on the engines. Fuel is injected once the required RPMs are reached. There is no bleed air or an air start mechanism.

    @dwightlooi@dwightlooi9 ай бұрын

    • Yes true! Modern aircraft use an electric starter just like the one for the APU!

      @JxJAVIATION@JxJAVIATION8 ай бұрын

  • Cleverly narrated by a robot-no human involved.

    @Telephonebill51@Telephonebill51 Жыл бұрын

    • Yes! Hope it was useful!

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • easy to under stand tq

    @logistikbatupahat701@logistikbatupahat7015 ай бұрын

    • Thank you! Check out my other videos as well!

      @JxJAVIATION@JxJAVIATION5 ай бұрын

  • So when the engine starts, is that the rumble noises u hear when ur being pushed back?

    @Soapy_Water06@Soapy_Water0610 ай бұрын

    • Usually one of the engines is started during pushback!

      @JxJAVIATION@JxJAVIATION9 ай бұрын

    • @@JxJAVIATION oh ok

      @Soapy_Water06@Soapy_Water069 ай бұрын

  • Thank you

    @ashtonkthcer7852@ashtonkthcer7852 Жыл бұрын

    • You're welcome! Check out my other videos as well!

      @JxJAVIATION@JxJAVIATION Жыл бұрын

  • Thanks, very interesting! How does the APU start? electric? What is the pressure of the air needed for starting? Something like 10 bar or more to 100 bar?

    @wasserdrucker6227@wasserdrucker62273 жыл бұрын

    • You are Welcome! The APU uses an electric motor for starting. The air pressure required for starting the engine would be less than 5 bar.

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

    • @@JxJAVIATION thanks!

      @wasserdrucker6227@wasserdrucker62273 жыл бұрын

    • @@JxJAVIATIONindeed, I cannot imagine a electric starter to a GE90, I just cannot conceive it

      @bobelaviador@bobelaviador3 жыл бұрын

    • @@JxJAVIATION 5 bar is enough for making the HP shaft turn ?

      @sjmunoz@sjmunoz3 жыл бұрын

    • @@bobelaviador The 787 has starter-generators

      @Greatdome99@Greatdome993 жыл бұрын

  • We don't know exactly where, when airplanes begin but i believe there is a wire to connect the engine to start.

    @mythicalcrafted8873@mythicalcrafted887310 ай бұрын

    • Some engines need wire, pipes, tubes etc

      @JxJAVIATION@JxJAVIATION9 ай бұрын

  • Where does the high pressure air in the first place come from? Is it some pump working sucking air from the atmosphere?

    @sivaprasadwarrier3171@sivaprasadwarrier31713 жыл бұрын

    • It is a compressor that takes air from the atmosphere and compresses it.

      @JxJAVIATION@JxJAVIATION3 жыл бұрын

    • @@JxJAVIATION thank you for the clarification

      @sivaprasadwarrier3171@sivaprasadwarrier31713 жыл бұрын
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