How Jet Engines Work | Part 5 : Power

Aircraft: Boeing 777-300ER
Engine: Turbofan | GE90-115B
Aircraft systems explained.
* Thrust management system.
* Thrust reverser system.
Major components covered.
* Electronic engine control, forward thrust lever and reverse thrust lever.
* N1 and N2 shaft.
Software's used for making the video.
* Blender 2.93 and Filmora 10.
Background music used in the video.
* Go big or go home (Filmora stock library).

[@vitsirosh3722]

This channel is tiny and you put in more work than mainstream well paid content creators with teams of editors. You sir have my highest respect

[@mathewmburu93]

Àj

[@AlteraLin]

I had NO IDEA that a jet engine was this complex. Thank you for this vid.

[@TheAstroguypasa]

The level of complexity is so mind boggling

[@matt8863]

Incredible series, best I've seen in 15 years of watching KZbin. How about a video on the grandfather of the high bypass turbofan...The Pratt & Whitney JT9D.

[@AdityaKumar-lt5vu]

Man literally the amount of hardwork you've put into making of this video is amazing. Definitely worth of Millions of views. Thank you very much! Keep providing the best content.

[@AircraftScience]

My pleasure!

[@OneAndOnlyMe]

Awesome series. I've always wondered how reverse thrust works.

[@saketroy1667]

Thanks for the series of videos and tutorials explaining all the function in detail and easy to understand. This is gold.

[@olipirard]

I just watched your "Jet engines" serie videos in a row. This is an outstanding playlist on the topic. You must have spent a huge time to create these videos. Thanks a lot.

[@bigredc222]

Great video. I always wondered what all the little pipes that are all over a jet engine were for. Thank you.

[@ajsalvlk]

Man never thought jet engines is this much complex. Maintenance and check up of these engines must be fascinating to see.

[@GalileoAV]

Thanks for this stunningly deep series, impressive work as always.

[@eightmilesupwind9030]

This is beyond awesome. Thank you so much for the show. Looks like fewer and fewer people went through each episode. What a shame. This is brilliant!

[@gnryushi]

What a great series. This is amazing work. Best ever on KZbin. Thanks so much for these.

[@jaysavania5304]

Brilliant series! One of if not the best series on turbine engines that I have watched. You made everything so easy to understand! So informative and helpful for myself as an Apprentice Aircraft Engineer!

[@AircraftScience]

Glad it was helpful!

[@skatman1837]

Amazing series! Thanks for all the hard work to put this all together.

[@piloteprive373]

Amazing work done here! Looking forward to more video

[@johnopalko5223]

I had never heard of this channel until I accidentally ran across it today. I've watched all five parts of the GE 90 series and, holy cow, I'm impressed!

[@Jefford717]

Thanks for the detailed analysis

[@MutahirRasool]

Fantastic! Short and crisp. Amazing work Aircraft Science!

[@Fyuryus]

Great series. I build many of the products you mentioned here. My employer doesn't find it worthwhile to educate us so this helped to fill in a lot of the blanks.

[@formatogrande397]

absolutely first class production. 10 stars

[@hodb3906]

This is amazing. One of the best and most informative series of videos I've ever seen. A suggestion would be to do the PW GTF and Rolls Royce RB211/trent engines after the GE90. Those are marvels of engineering as well. Or maybe the GE9X and compare the differences in pressure ratios and stages in the core to a GE90. But again, you are doing a terrific job. Can't wait for the next video.

[@AircraftScience]

Great suggestion!

[@muhammadabdullah03]

@@AircraftScience yup.. i am waiting for the GE9X serious..

[@muhammadabdullah03]

Or you could do a serious on the Trent 1000 engines ( Rolls Royce)

[@lucaschiessl7242]

Love this series- would love to see a series on RB 211 as found under the wing of 757

[@whicking1]

Your concept explanation with apt animation has made me a huge fan of your channel. These videos are just too good to be complimented in words, Please keep on bringing them. Kudos to you bud. 👍

[@Hasunori]

Great series. Thank you.

[@space1commander]

Excellent work on all Your Videos. Thank You.

[@andrest2003]

awesome series just watched them all !

[@vmccleod]

Great Series!!!

[@GB-vn1tf]

Well that was an excellent series, definitely getting subbed. 👍

[@manasnagesh5071]

One of the best engineering video's I have seen, very detailed explanation with amazing visuals.

[@pitrasebastiao5913]

Stunning, stunning stunning!!!

[@Gabriel.Bonfim]

Wow! It was worth watching this playlist. If only there were some digital material such as PDF file holding all the transcription and images shown so far to be checked at any time. Thanks for these videos!

[@jeffholzmann]

Nicely done and informative

[@johncunningham4820]

Watched the Whole 5 parts . Fascinating , Extremely Informative and Outstanding , easy to follow Presentation . Best de-mystification of Twin Shaft Turbo-Fan Engines I have ever seen .

[@DanisTV350]

THANK YOU SO MUCH!

[@jumeldipancaputra87]

this is really lovely video for me, that I got failed to get Aerodynamic School when I was 19.

[@user-uf5qu5bg6e]

Brilliant!!!

[@antoineheaven]

Oh man it's very interesting I need to watch all de video 2times it so brilliant

[@asharma9345]

Epic Video.

[@lovesky9990]

Excellent video

[@nithinjohn4425]

Thanks for the video. Until morning i was seeing so many videos about GE90. But just now only 5 videos are available in the channel...

[@naveensrinivasan7215]

Loved the series! Excellent visual representation of the inner workings of the engine. Great job! 👍🏻

[@AircraftScience]

Thank you very much!

[@propranjan]

Visually stunning.. please put more videos

[@valentineambrose3929]

Truly incredible. Feels like my favorite sitcom has ended. Sense of amusement, awe and satisfaction yet sad that it ended. So informative. So well put together. 👏

[@AircraftScience]

Wow, thank you!

[@Bollywoodwater]

I have watched 5 videos of engines of this series 👌👌👍 very good explained

[@aesthetic_vi4631]

Thank you for this video series. I don’t know why I thought I had to know this stuff but the video and your animations explained it soo well. Thank you very much for your effort

[@AircraftScience]

Glad I could help!

[@tropicaltroll2288]

Underrated channel. Deserves more views & subscribers. Subscribed

[@thabg007]

after watching all 5 parts.... I clicked subscribe

[@erdum]

What a incredible videos man, keep it up❤

[@AircraftScience]

Thanks, will do!

[@x-gamessimulator1067]

Goooood

[@smudent2010]

CGI makes learning so much easier

[@rockychen8115]

Great video,help me to know more about the Ge90

[@59vijaiyaaravindthsr39]

hats off

[@e-zeek-2502]

Thank you.

[@AircraftScience]

Welcome!

[@b43xoit]

Thanks for explaining the reverser. Quite an interesting subsystem. There are so many forms of power available for the accessories. Bleed air. Air at various pressures. Electricity. Hydraulic fluid. Pressurized fuel. I wonder how the engineers choose, for a given load.

[@a-a-ron4679]

Subscribed

[@huubvelthuis8988]

Could not stop watching. its 3:30 AM on a normal workday. would do it all again. smashes like button & sub

[@AircraftScience]

Thank you!

[@athoimeitei8753]

This is the best channel in the world ❤

[@one.darkstar]

Awesome work, sir. Thank you again. This is a top-quality playlist, and your channel deserves many many more subscribers and viewers.

[@AircraftScience]

Thanks for watching!

[@rufustrunt9889]

83% of thrust comes from the turbo fan!! So basically we are flying around in propeller planes then.

[@b43xoit]

Ducted fan.

[@seantaggart7382]

So there's still a tiny amount of foward trust while reversed? Neat!

[@ss_sch292]

So if FLEX TEMP is used for take off I tell the engine that it is warmer -> so the N1 decrease. But work it vice versa? So if I use a FLEX TEMP colder than OAT, the engine should also reduce N1 or did I understand something wrong?

[@joeycao4419]

I would like to know if it is possible to find / purchase the GE90 3D model... It'll be great for studies if it is available. Thanks in advance!

[@djtaketakekunikawaguchi6294]

Absolutely fantastic videos. You will gain a lot of subscribers I am 100% sure.

[@AircraftScience]

Wow, thank you!

[@funniyoutuber]

4:30 here ya go. For RT

[@nickdunstone]

Excellent series which I've watched 3 times now! The detail of the graphics are unsurpassed, well done! (I don't suppose you could do the RR Trent ;) )

[@AircraftScience]

Thanks for the tips!

[@hamsandwich1860]

I dont understand at 1:40. How can the engine control the thrust without utilizing the fuel flow to n2? To my knowledge the only things you could control were fuel flow in the combustion chamber (which will increase hpc pressure before it increases fan speed and bypass thrust) and stator angles. I dont understand how you could get the engine to alter bypass flow rate without first altering fuel burn rate in the combustor.

[@jatigre1]

Wow!

[@mohammedayaankhazi8970]

hey, love the video buddy and love your work, hats off to you. If you don't mind can you tell me your source for info on GE 90. Cause I'm an Aeronautical engineering student and I was working on a report which was about GE 90 and Your videos along with GE's vedios of GE 90 were my main source of info many thanks to you. I tried some other sources and didn't get much info. So if you could tell me your source it would really be helpful for me for my future college reports along with your videos. Thanks :)

[@u1zha]

Oh my oh my. This is a masterpiece. Fantastic visualizations, you handled everything, air and fluids and fire... Only nitpick, a recommendation would be to ease a bit on acronyms. (Not even on the music, haha) Or at least flash a callout spelling the acronyms in full and indicating the location of the thing. At this pace I can't memorize what EEC EGT ACC are, nor can I always remember where they sit on the airframe. My curious eyes are left hunting around as to which general area of the complex apparatus is going to spring to life.

[@rayanaltowayan9558]

What is the spar valve ? And function

[@TrongNguyen-dv1ir]

Chia sẻ chơi mà thật sự luôn nếu làm việc lớn phải học hỏi và giỏi cũng chưa chắc ai đã hài lòng đâu nhưng vẫn phải làm việc

[@tfscanlan]

Excellent video, thank you. If TOGA is applied, will thrust exceed 115K pounds or is that EEC limit never exceeded? Cheers

[@AircraftScience]

The rated thrust will not be exceeded.

[@augustomanzo4515]

Excellent! i would like to ask if the engine has a cooldown sequence before or after it´s shutdown.

[@AircraftScience]

There is no controlled cooling sequence for the engine during the shutdown.

[@g.tucker8682]

There is no cooldown cycle, and it is permissable to shut down immediately if needed (for example, parking after a very short taxi). However, it's recommended to operate the engines at or near idle power for five minutes before shutdown, when possible.

[@praveenshetty2066]

👌👏👏

[@Pheer777]

Looks like there is still thrust going from the rear, what percentage of the thrust is diverted to the reverse position? Thanks!

[@AircraftScience]

The GE90's bypass airflow, which produces 83% of the thrust, is redirected.

[@MrPauldo58]

Does the engine suck air at cruise speed

[@donaldhi1816]

Could I get the resources you used to make this video? Thanks

[@mixedtwice1012]

Let's fly the world like the jetsons

[@elfrancotirador7737]

how can we download the subtitles of this video

[@muadellafi2523]

All love from Libya Please download a course on the B737 NG plane ❤️🇱🇾✌️

[@dapje2002]

That s a lot of words to say "the eec compensates for atmospheric conditions by adjusting the rpm... "

[@vitsirosh3722]

Imagine how much more complex is a modern piston engine

[@user-ro9jd6ts7x]

All 5 Parts are watched. Regarding 4th and 5th parts, my humble Views. 1. In the 4th part, regarding bearings and aircraft load sharing were discussed. At 4 stages roller bearings and at 1 stage ball bearings were, as per narration, used. But Clarity is Not given in Roller bearings as there are Three types of the Roller bearings. If Rotating components' speed is comparatively lower and supposed load-taking is higher, roller bearings are used instead of Ball bearings. Roller bearings are Three types, namely Cylindrical Roller bearings, Taper Roller bearings and Spherical Roller bearings. In Cylindrical Roller and Taper Roller bearings, due to more contact area of Rollers in the Run-ways of the bearing; heat generation is higher than that of Spherical (improved design) Roller bearings. Later type of bearings take Radial Load generating comparatively lesser heat than that of Cylindrical Roller and Taper Roller bearings. Ball bearings are used where speeds are comparatively greater and load bearing is minimum. In the 5th part, regarding Air Thrust and its compensation, coping up and / or controlling to its possible minimum level was discussed. For compensating, Heat Exchangers are used and their heat dissipation is done through surface air flow around the Heat Exchangers. In running mechanical components, heat generation is natural. But, in aircrafts for possible minimisation of heat generation; in the designing stage itself, Aerodynamics aspect is given very important role. No where in the narration, Aerodynamics matter was Not even spelt! In any scientific Invention, first any probable uneventual outcome is assessed eliminated or ruled out; then only matter of compensation and / or its coping up matter is planned and designed.

[@b43xoit]

Does the high-pressure shaft rotate faster in an angular sense than the low-pressure shaft?

[@AircraftScience]

Yes, the HP rotor speed is 9350 rpm, and the LP rotor speed is 2350 rpm.

[@David-yy7lb]

I watched all 5 videos and that was the best explanation of how the engine works, so if I understood correctly the engine automatically goes to full throttle once the thrust reverser is fully deployed??

[@AircraftScience]

No, the pilot has to move the lever to maximum reverse. Automatic systems of the aircraft are not allowed to control the thrust reverser.

[@David-yy7lb]

@@AircraftScience the reason I asked is because I've seen several KZbin videos on cockpit landings and seen the pilot pull the thrust levers to idle once they touch down pull up the thrust reverse levers all the way up and can hear the engines spool up automatically although the thrust levers are in the idle position that's why I asked do the engines automatically go to full throttle to maximize the reverse thrust, I think have previously worded my question wrong? FF to 4:57 you can hear the engines spool although the thrust levers are at idle kzbin.info/www/bejne/e5LJp4VsZZyemJI

[@markrix]

I've watched this all and I'm just still curious how is N1 and n2 independently controlled other than their two independent shafts.. inlet veins?

[@AircraftScience]

They are not controlled independently on the GE90. Changing the fuel flow will affect the speed of both shafts.

[@deansnipah1392]

N1 speed is strictly the speed of the fan. N2 speed is the speed of the compressor section

[@b43xoit]

Vanes differ from veins.

[@dmoneysrevenge3360]

Can you please do a series for PW2000 and PW4000 engines?

[@AircraftScience]

Thanks for the suggestion. I'll consider them for the next engine series.

[@DickyAndresa]

Great video i wanna ask something. what percentage of reverse thrust by the thrust it self?

[@g.tucker8682]

Only the bypass air is reversed. The combustion air continues to flow through the core and out the rear exhaust. Because the bypass ratio is very high, the net result is negative thrust.

[@u1zha]

​@@g.tucker8682 Correct but that didn't answer the percentage. Can't simply negate there -.83 + .17 = -.66... There is a lot of loss because much of the reversed thrust goes wasted sideways

[@g.tucker8682]

@@u1zha I understand your question better now, and I agree that's it's not as simple as bypass mass minus core thrust, for the reasons you stated. I wouldn't guess at the real answer, but I can tell you from experience that they are pretty effective. However, you don't feel much difference when the reversers are opened, but that's because of the way the overwhelmingly powerful autobrakes work. If you land with reversers inoperative, you'll definitely see much higher brake temps. By the way, the brakes are so good, we normally just open the reversers and leave them in idle. The only time I'd pour on the reverse is for a minimal landing distance, land and hold short clearance, or rejected takeoff.

[@gjierodelapena1689]

Can you make a320 videos please like the part 1 ? Thanks 😬😬😅

[@aussiemark01]

How does the eec control the N1 shaft speed? It's not clear how it does this.

[@AircraftScience]

Kindly watch the entire series.

[@aussiemark01]

@@AircraftScience I did tho, what did I miss?

[@AircraftScience]

To change the N1 speed, the EEC commands the HMU to vary the fuel flow for combustion.

[@andreizadasilvapereira5312]

The plane's exterior is mirrored because there's cargo doors on both sides, and in real life, the cargo doors are only at the right side.

[@shawnpwatsons1]

There will be a pop quiz on all four video installments in 5 minutes. You will be asks to recount everything after "Welcome to this series.". Good luck students.

[@wardogies]

Talk about engine failures and surges

[@christincherian4315]

Hi this vedio episodes about GE90 is so informative and I am actually design the combusting chamber (annular) and i am also working the field of Aerospace material science as a PhD student. If don't mind can you please provide any of your contacts information like email. Best Regards Christine Cherian

[@shimonsaied8714]

what have you studied ?

[@yeesumin8603]

Turbine engine 🦕

[@b43xoit]

Almost every mention of "condition" is redundant. High temperature, for example, is inherently a condition.

[@TrongNguyen-dv1ir]

Không tin thì hỏi thăm tổng thống nào cũng phải đi học trở lại cho giỏi mà làm việc cho tốt vào

[@sayedyusuf5464]

এই গুলি বেশি বেশি তৈরি করুন বাংলা দেশের মধ্যে

[@user-fv7xy7qx3l]

اجعل الكلام بالعربيه

[@rezamoghadasianrad7743]

Jet engine work full time to pay bills