How Jet Engines Work

[@5disguised]

Thank you! Finally an animation that shows the propellers rotating the right way.

[@tamar5261]

Please loose the irritating music. Good video.

[@tamar5261]

​@Hull's Production's yes

[@alaskaaksala123]

@Hull's Production's lol

[@johndufford5561]

Get rid of that horrible music & just let the boy talk!

[@manojkothwal3586]

Seconded.

[@tmc3178]

It helped me focus

[@bruzote]

This video is more awesome than people may realize. This video captures the following visual information I have not seen in other videos. First, it shows clearly how the air flow volume is actually only a thin cylinder around the spinning fans. Most pepole don't realize that air hitting the engine does not go through the engine even close to the center. Second, it shows how this particular kind of engine has not one but two coaxial counter-rotating shafts. Three, it clearly shows the angle of the compressor blades (I mean the moving blades) and the stator blades (the fixed position blades along the outside). Fourth, the second and third features combined allow you to imagine how the air flows from the forward exterior fan, gets pushed through and will start spiralling, and the *spiral* flow from the front engine fan then meets the first row (part of first stage?) of compressor blades at a *low* angle of attack (the blades are efficiently moving through spiraling air like a wing). I always wondered how the blades were not acting like a wall pushing air. It's because the air coming at them is spiraling and not racing straight in. This reduces the angle of attack, so the compressor blades don't create turbulence (or stall). Then you can imagine (yes, you need to imagine) how the first row of blades starts reducing the spiral flow, so the next row of blades needs to be angled to face more of an axial than spiral flow. This continues through the compressor stage. The video does fail to mention there are two stages (or three? if you count the front blade?). From what I call the first stage, the air still has some spiral motion, and the second stage of blades then rotates in the opposite direction from the first, allowing the blades (like before) to meet the air with less angle of attack. This allows for reduced turbulence/stalling while allowing the blades to do more work. Again, the fans have less and less angle as you go from front to back. All while this is happening, look how very little space the air is moving through. It gets smaller! Now, an engine working at a steady speed always has a steady amount of air mass moving through it (lets say pounds per minute). Each slice of the engine has the same flow rate. Where I pointed out the cylinder gets smaller, the mass moving through has less space, so it must be more dense. That means it *must* be at higher pressure (unless you could magically cool it to reduce the pressure). So, you see the air must be flowing through at higher and higher pressure. Then, when it gets past the second stage (second set of fans), the flow is allowed to expand where it meets the fuel. NORMALLY, expanding air flow reduces the pressure. However, the fuel is ignited at the expansion point. The heat is just like an explosion - it prevents the pressure from dropping. So, you go from a narrow, high-pressure flow to an expanded area with similar pressure. Note - the pressure is NOT greater in the combustion chamber than right upflow. If it were, the flames would move forward. No, the pressure actually DROPS in the expanded flow in the combustion chamber but not much. However, although pressure keeps dropping from final compressor fans to combustion, the ENERGY/work put into the air dramatically increases due to the burning fuel that is preventing the pressure drop in the expanding flow volume. Then, this air is once again squeezed through a narrowing opening, speeding it up and meeting the exit stage of the turbine. (I don't know the terminology.) I may sound rambling, but my point is - I have not seen a video that allows you to see the moving parts this way. I am especially stunned I did not know (a) how narrow the air flow cylinder is and (b) that the engine has counter-rotating shafts, one poking through the other. Cool!

[@vagabond630]

can you explain me why are there turbines?

[@untrust2033]

@@vagabond630 this man just spent the good part of a day detailing his opinion on this, and you ask HIM why there are turbines? Watch the video dumbass

[@thedarkchocolate4700]

Wow! Maybe you can re-narate the video. Your in-depth observation is what I needed.

[@vagabond630]

@@untrust2033 fuck you man, I wanted to know If there are turbines, won't there be energy loss? The velocity of the gas ejecting out would be reduced. But then again is the thrust actually produced by the exhaust? or the thrust is actually produced by the fan sucking in the bypass air and this fan is powered by the turbines?

[@ZXXpilot]

bruzote you mentioned everything Except the FREQUENCY of the compressed air. ;)

[@acemaxximus7175]

The sound effects helped me understand better, thanks Pratt & Whitney!

[@jasonlake2427]

Thank you pratt & whitney..only video that has made sense..now I understand jet engines

[@joshispro345]

This was a really well animated video and it was very easy to understand thank you!

[@kelseyj9813]

That made so much sense. So glad I could learn this!

[@acreepykiwi6788]

I like bow P&W put what is basically an equivalent of 'buy my merch' at the end ))

[@KhoPhi]

One of the most educative adverts I've seen in a while

[@rabbanigr]

Thanks for making it so simple.

[@trueindian887]

Beautiful explanation.I understood the jet engine concept clearly.Ty and keep it up.

[@wizardred2408]

Keep it up? they have been supplying engines to legendry aircrafts for decades

[@jaimemartin6748]

Very cool. I didn't know the blades turn in opposing directions... I've seen these engines in museums cut open to see inside, but I couldn't figure out how the things don't just shoot flame out of both ends!

[@T1Earn]

i can watch vids like this all day

[@karlwolf9805]

The trick to higher fuel efficiency? An amazing gear.

[@alexfright8217]

Haha 😂

[@smusks1966]

Thank you very much, I'm just studying the principle of jet engine compressorsk. Thank you for show me this close look.

[@tarrevizslafett5205]

Explanation is really clear!

[@bruzote]

This is all amazing, but I still also love even more watching a simple afterburner take-off and feeling it rattle my bones! :-D Well, I guess I can't do that anymore. I only served a brief time and I am not near SR-71s or other AB-equipped jets that are taking off. (OK, nobody is near SRs taking off anymore, but one time I had a single privilege of witnessing that.)

[@BrunoBoy3913]

I did too. I was stationed at Beale AFB where nine of them were kept. Watched from the flight line. Bone rattling amazing

[@bruzote]

@@BrunoBoy3913 - I saw mine at Beale. I was with a small summer contingent of USAFA cadets that stayed there a couple of days. Operation CONUS was the name of the program I was in. Small groups of cadets were sent to tour various groups of three bases for two weeks. My group was Beale, McClellan, and Travis. (A few years later I ended up serving at Travis as a lieutenant in the Travis 22nd AF Ops center Weather Support Unit, plus doing flight line wx briefs and forecasting). I remember touring the Beale maintenance facilities and one airman animatedly expressing his passionate hate about how often his uniform got wet from all of the leaking fuel and hydraulics, plus all the laundering required! That was kind of funny. He and some others were not fond of the Marysville area. What did they want, New York City? That's life in the AF for most people. So, we got to see a daytime takeoff of a U2 and a takeoff of a Blackbird, plus a sit in the simulator - but it was off and a few things were covered up. The sim was cool and lame at the same time. Us cadets were a little bummed, as we had heard from others how they were given flights in F-15s or at least cool sim rides at their respective bases. We ended up riding in KC-135 that refueled a Blackbird. We each joined the boom operator for a bit. That was a special treat. How many people get to do that? I think the ride doubled up refueling F-16s as well, or maybe that was another tanker ride. It is still amazing (to anyone not in a coma) how superior the Blackbird was to anything else that ever flew high and fast.

[@RobotCentral]

Fantastic video. Thank you!

[@JohnDoe-yq9ml]

Thank you 🙏🏼 I love Pratt & Whitney ❤ amazing video

[@RuiPlaneSpotter]

I really liked the video, thanks!

[@Simon_r2600]

I already knew how they work but I enjoyed watching it anyway. Good video

[@geraldbull9272]

Why so hyped and the music does my head in, what good does that do.

[@luthandolaw2301]

Best explanation i ever had on jet engines thank you

[@ed.sailor1031]

tego the best to oni ci tutaj nawet nie powiedzieli ;)

[@UhhKhakis]

1:24 me after Taco Bell

[@dmrxy.]

Jackal lol

[@1974moumita]

lol

[@doapin6240]

I am the 69th like, so please don’t like exept if you are going to like this comment up to 6.9K

[@1974moumita]

@@doapin6240 after opening the page I see like counter is 69, don't worry I won't change it

[@vdmur7952]

lol

[@wydopnthrtl]

A very useful video. Thank you!

[@TheAsianpancakes]

Thanks for this educational video

[@aali5252]

Informative

[@funy0n583]

"an amazing gear" ok

[@Hopesedge]

Considering this video is an advertisement for their new planes it's no surprise they've dumbed stuff down so anyone can understand it.

[@ExtremeUnction1988]

fucking awful lol

[@billboyd4051]

Planetary would be too confusing here.

[@Dazhimself]

That's all you need to know... Lol

[@jamesbosworth9155]

😂 😂 😂

[@bobknob5819]

Best explanation I’ve seen.

[@abdurrahmanf.a.5624]

this has the best 3d animation than other videos

[@royhsieh4307]

anything that works on action reaction philosophy will work wonders until physical limitation comes in. this is why i love this

[@ahmedseada7371]

Freaking amazing video . Thanks 👏👏

[@woozy7405]

"An AMAZING gear" lmao what, the revolutionary secret to fuel efficiency has been an amazing gear all along

[@DB-nl9xw]

Best explanation!

[@rafakordaczek3275]

Yea, but it is still unclear to me how do those engines start.

[@skbmhango4109]

This is the best explanation so far ❤

[@joshwilliams4583]

Best explanation so far!!

[@Binette96]

Hi @Pratt & Whitney , may I know what kind of software are you using for this animations ?

[@nicholasaquino5160]

Bring back the LOUD JT8D's. That's how a jet engine should sound"❤

[@dweeder1453]

Wht nonsense. You have no idea what a jet engine should be like

[@nicholasaquino5160]

No maybe flying since 1984. Nahh" I Probably forgot more about a jet engine then you'd know!!!!!!!

[@dweeder1453]

@@nicholasaquino5160 Yeah flying an aircraft does not mean you know a jet engine, with all due respect. I work for GE and have worked for CFM / Safran in the past. here is a tip : noise leads to vibrations and losses making engine inefficient. in lay man's term. An old inefficient engine would make noise.

[@williejohnson6466]

Extremely Intriguing

[@Cruminum]

Pratt and Whitney is my favourite engine manufacturer

[@gregorymark6014]

Lol! Even in 1st class, who enjoys flying on a commercial jet these days? Those days are gone. Excellent video, regardless!

[@Ghent2007]

Pratt & Whitney -- Dependable Engines, Enduring Freedom.

[@alexconfidence2354]

One of the best and simple explanation

[@arundey1988]

Fantastic music in the background and also smart and to the point explanation.A Dey❤❤❤

[@Turrican60]

Impressive stuff, but let's forever remember that without Sir Frank Whittle, English inventor of the jet engine, none of this would be possible. As an Air Commodore, the RAF will be forever proud of Frank.

[@ZilogBob]

Sir Frank was a true visionary, like fellow Englishman Alan Turing who created the programmable computer.

[@sampeter8697]

Hey please look into the issues of neo 320 engine failures . 2 weeks ago another indigo flight.

[@tinetannies4637]

Another question, where is the rotating assembly suspended? And how are the bearings cooled?

[@gustavoechevarria9369]

So lemme get this straight, a Jet engine is basically a recoilless rifle and a turbo conjoined to make continuous combustion a reality. I thought these engines were much more complicated than regular combustion engines but it seems I was wrong; they seem much simpler than a regular car/truck engine!

[@ma2i485]

i agree its much simpler than a car engine just that there are alot of blades spinning to compress the air sucked in

[@bigchungus1848]

There are WAY less moving parts, which results in smoother operation while being simpler.

[@toby2581]

Yeah, they're really not conceptually complicated. The difficulties in the development of the jet engine were more about the comparatively advanced material science and manufacturing side.

[@infoandmotivationaltv5636]

Thank you Uploader and my sweetheart Angel KD 😘 😘😘💕👩‍❤️‍💋‍👨👌 👌

[@goodselections]

Awesome bro!

[@guyconiglio8223]

Very good video. Helped me!

[@ssoton]

hi there. can I use 10 seconds of this clip for educational purpose in my own language?

[@stephenmutuku3847]

Good explanation & clear animation,keep up

[@caanonuugfilmsacademy8794]

Pratt & Whitney J58 May I know how it works that engine and how to rebuild it 👍?

[@metalrulz9510]

Pratt and Whitney made the sr 71 what it was. Legendary

[@VitalMusic217]

At least this one got the rotation of the fan right

[@htiekmahned8859]

So what percentage of total thrust is made up by the turbofan vs. the jet turbine?

[@thenitgroupoff]

The video is awesome. Please what is the artist/sight name of the background song, playing on the background? It is very nice.

[@vipahman]

My son is joining P&W and will make this tech even better.

[@tech.Care90]

Nice video very good explanation.. Thanks for video

[@hungxenanghh490]

Can you tell me which software to use to simulate?

[@azmike1956]

Pretty badass! Slow down the fan for more thrust & better efficiency. Who'da thought!😉

[@jaffacalling53]

The most efficient engine is one that spits out a stream of air at almost the same velocity of the external airstream. So if your plane flies at 560 mph, a high bypass engine will dump air out the back at just below the speed of sound.

[@AlainHubert]

Annoying music, but interesting nonetheless.

[@cwr8618]

studies show you retain more when listening to music

[@AlainHubert]

@@cwr8618 Studies are also wrong sometimes, because the music was certainly distracting and annoying in this video.

[@cwr8618]

@@AlainHubert easy tiger, just sharing a thought

[@ugh2668]

eh, didn't mind it much, but you have a point

[@0nEl0vE_3m]

I mean that's YOUR opinion.. I enjoyed it and the video. Thanks for sharing your comment..

[@johnlibra7734]

Very impressive!

[@nitnotesoff]

The background music is so amazing any link for the site or artist ?

[@ABC-dw7pe]

Rugrats - theme song

[@riyadhacheh1410]

what made the turbin spin?

[@simonbyrd6518]

Yes, everything is like squeezing a balloon..

[@thomasfamily42]

Which part of this engine is grounding all the NEOs?

[@nsambagerald3150]

Viewers out their i would like to know the program used to come up with the animations in this video clip, I will be grateful from your positive response.

[@andrerovigatti9997]

I would like to understand : how axes are interconnectet / or not ? Which turbin moves the fan ? Why the last turbin is spining in opposite direction of the big fan ?

[@boshiij3449]

I'm sold! So where is my " buy one and get one free" button?

[@louprentz8554]

GREAT VIDEO

[@SeverSTL]

How does it start? thanx, good video. ...... I have been wondering that all my life3.

[@PrajeshMajumdar]

Fantastic video, kindly make more and more PW videos...

[@jayantakumarborah]

fantastic explanation

[@PrasadSalavi]

That's good information 💯😍

[@dweeder1453]

The direction of rotation of fan is opposite of direction of rotation of turbine with same spool? is that correct?

[@praffulsharma5615]

thank you!

[@kavyabiswa5209]

Gracias .... For this video

[@ihsanullah7798]

I like ur video love u bro

[@lexluther919]

kinda like in your car where air comes in the where the spark plugs spark and gas is sprayed as a mini bomb make the pistons move up and down thats the thrust to push and make camshift go

[@gdfggggg]

...and the bypass air also expels most of the water you get from storms etc rather than it going through the turbine.

[@arunk8663]

What type of bearing and lubricant being used, can you please tell me.

[@mrugennaik534]

I love my company. We, the dependable people with dependable engines.

[@kushalsharmajii1326]

Please make a video of pressure cleaner.

[@TopCollections]

what energy rotate those blades ? how the blades get initial velocity ?

[@tgstudio85]

Thanks to pumping air by smaller turbine in rear of plane, that starts thanks to electric motor.

[@learning9503]

what source rotate the turbine fans ?

[@TheBhartiyaTrainee]

What's the ratio of the thrust produced by the core exhaust air and peripheral exhaust air?

[@matsv201]

The bypass ratio is about 10, but the thrust ratio os always lower. The actuall ratio depends on speed, thrustsetting and altitude. But typically in cruse something like 5 or 6.

[@billboyd4051]

"A Kind of super gasoline" seems to be confusing the engineers here.

[@geagon1392]

Great explanation👍

[@chickenychickens5154]

I never knew that there was no motors in turbofan engines

[@sufiyansheikh]

Very short and informative

[@ChrisZoomER]

They left out a few parts but a good explanation nonetheless!👍

[@PrinceDasilboy]

Wow well explained👏👌

[@ramubhaipatel6096]

Nice video good job .😀

[@029shaikarif9]

the thrust force acts opposite to the engine so it can lift with max velocity

[@codenameadvencha927]

Can I use your video on my channel for educational purposes? I will share my audience by sending them to your channel to view the full video!

[@franksulka3346]

Great video.

[@acedelrosario5047]

What does that fan makes spin

[@sahilp9470]

now, i will go make my own

[@santinojozefmiller7721]

1:39 the background noise. Is that the sound of of the rotor blades of a Bell 206 helicopter?