NOTE: After shooting the entire video I noticed that the turbine blades are pointing in the wrong direction. The "scooped" part of the blade is pointed away from the stream of air. I was just blindly following the model instructions and focused on shooting the video so I missed this. But this video just covers the basic operating principle of the engine and I didn't discuss any fluid dynamics, this will be corrected and explained in more detail in future videos. "Use juxtapose in a video title" crossed off the bucket list This is the jet engine model from the video: *REMOVED* until the assembly instructions/parts are updated by the manufacturer. Patreon: www.patreon.com/d4a Amazon: amzn.to/47U9Zhj Shop: driving-4-answers-shop.fourthwall.com/en-eur/

@Rampart.X

5 ай бұрын

Replace "against" with "with" - ie "juxtaposing with"

@luiscardozo0000

5 ай бұрын

i want to know where did you learn to speak english like that?...its amazing , please tell me and another little question why you dont live in the us or canada we really need people like you...thank you very much and please answer me

@Lozzie74

5 ай бұрын

D4A, I’m glad you commented about this. It was the first thing I noticed and came here to comment but was glad to see you had made the comment.

@Lozzie74

5 ай бұрын

@@michaelbrinks8089turbofan blades look just like turbine blades. They are simply larger. Their role is to act like a propeller to generate more thrust.

@MinecraftMasterNo1

5 ай бұрын

@@michaelbrinks8089 Yeah, maybe a video on Turbojet vs Ramjet vs Scramjet would be good as well.

Can you imagine how developed of a world we would live in if all the teachers were just like this guy

@d4a

5 ай бұрын

There's likely many better ones out there . It's maybe the willingness of the people to listen that's the bottleneck? 🤔

@4ffff2ee

5 ай бұрын

@@d4a come on buddy, don't be so humble. teaching and explaining stuff is completely different from knowing stuff, and it's a skill on its own, you're really damn good at that. you really should be a teacher. and on the topic of the gas turbines, i'd love to see you do one about turbofans too. i get how they work, but i don't understand why. i don't get what's the purpose of the bypassing air.

@bernarddelossantos322

5 ай бұрын

Exactly.. im not a native english speaker and yet I easily understood every explanation he says.. one of my very few favorite youtube channels.

@williambarry8015

5 ай бұрын

I probably had teachers as smart as this guy but i was too stupid to realize it.

@SnowIsMyTerrain

5 ай бұрын

@@d4aIMO, there's a lot to be said about someone who can explain things well, understandably, and passionately. There's a whole lot of people out there who only avoided learning something because of bad teachers.

50 years I've been trying to work out how a jet engine actually works. Thank you for 16 minutes. Brilliant!

@Sir_Cactus

5 ай бұрын

Sadly this expanation is not entirely correct. The gas pressure in the combustor does not increase, but decrease. Heating the air expands it, which would increase it's pressure if it were in a close container, which it is not. There is some backpressure in the combustor, as the turbine and the exhaust nozzle somewhat restrict the airflow, but the pressure in the combustor is always lower than the compressor discharge pressure. Otherwise the compressor would not be able to push more air into the engine and the engine would stall.

@Blockbuster2033

5 ай бұрын

@@Sir_Cactus But doesn't increasing the pressure in the combustion chamber also make more power, because you are basically moving more air through it? Basically like turbocharging a piston engine?

@JohnFrumFromAmerica

5 ай бұрын

​@@Sir_Cactusyou have no idea what you are talking about. The pressure in the combustion chamber is 60psi or 4 bar . This takes seconds to look up why post such bad information.

@Dellvmnyam

5 ай бұрын

Basic jet engine principle is much siumpler than described here.

@akhtarkh

5 ай бұрын

If you don't have internet for 50 years, there must have been libraries, where I used to get my information before the internet.

Another huge upside for jet engines is their incredible reliability, as long as they are maintained properly they will almost never fail, save for external things like a birdstrike or a fuel system failure that would have stopped any type of engine. And even if one of them were to fail, they have so much power that a fully loaded passenger jet is capable of climbing on a single engine. They just fit so perfectly in the role of an aircraft engine it's incredible

@3SPR1T

5 ай бұрын

They have an extremely long life span compared to piston engines but yes they do fail... Usually to degrading turbine blades because it's the most stressed member of the system. One major facor is thermal cycling. The longer the engine runs at a time the longer it will last. Industrial turbine engines that never shut off can last up to 20000h. The thermal cycling lead to cracking of the turbine blades.

@Blockbuster2033

5 ай бұрын

I largely agree, however, a birdstrike will do barely anything to a piston engine, but can totally destroy a turbine.

@MinecraftMasterNo1

5 ай бұрын

@@Blockbuster2033 Clogging the air intake on a piston will lead to an extremely lean air-fuel ratio leading to numerous issues that can permanently damage the engine. What are you talking about?

@Blockbuster2033

5 ай бұрын

@@MinecraftMasterNo1 That is correct, but the air intake is extremely small for a piston engine in comparison to a turbine engine making it less likely to get hit. Also it's very unlikely that it actually clogs up.

@D3V1NF5

5 ай бұрын

As an aircraft maintenance technician I can attest to this, in fact, only a few hours ago I was doing an internal inspection of a 737 jet engine for wear and damage. The engine in question had just under 35,000 hours on it. Meaning that it had been ran for close to 35,000 hours. The inspection went fine, which is to be expected, because we normally get another 20,000 hours out of it before it needs to rebuilt! They are truly magnificent feats of engineering.

Thank you. Natgeo and Dicovery needed a competitor. Calm explanation, understandable diagrams, important efficient interesting content and no commercials, this is what a popular science channel should be like. Looking forward to new stuff!

@jesusfreakpl

5 ай бұрын

Dicovery - should be Dickovery :D

@brianb-p6586

5 ай бұрын

But there are substantial technical errors.

I commend you D4A for trying to explain these complicated engines. Heres some feed back! 1) they vibrate like crazy, as they can rotate at speeds well over 50krpm, it's not uncommon to have "modes" or natural frequencies in the 900hz or more. 2) compressors: the rotors increase P total, the stators convert most of the Ram pressure into a static. 3)the reasons each stage gets smallest is due to the density increase of the air. The engine must have near constant mass flow throughout. (Near constant due to bleed systems etc..) 4) as the gasses combust, the pressure goes down! If it didn't, it would go back to the compressor which is lower temperature. The highest pressure in engine is right after the compressor. As the gasses burn and heat up, the velocity increases. 4) the turbines have two sections like a compressor, stator and rotor. Also, unlike a compressor, they increase in size due to the density decreasing over each stage. 5) for most jets, the highest temperatures are seen on starting. There's not enough airflow to cool things and there's a ton of fuel burning on things. That's why the quickest way to kill a jet it to start it with a weak battery. 6) the ignitor only comes on at start or inclement conditions. Generally combustion is self sustaining. 7) the turbine on the model is installed backwards. 8) the usual limit on rpm is the material properties of the rotors due to centripetal force. The larger the engine the slower it will rotate. 9) One thing you did not mention, as the engine has all stages operating simultaneously, the engine grows unevenly, the cold section compressor will grow very little, the combustion and turbine section can grow A LOT. A large turboprop can grow as much as a .25" over those sections from cold to max power. Again, nice video.

@kentauree

2 ай бұрын

What a load of bs!

@therflash

Ай бұрын

@@kentauree what?

That shot panning up from the bike exhaust to the jet taking off was real smooth ❤ thank you for more knowledge!

@TheRalliowiec

5 ай бұрын

Trying to channel some James Burke, no doubt. Too bad this wasn't a video about rockets.

@jetcitykitty

5 ай бұрын

@@TheRalliowiec I'm going to be honest, I have had a huge crush on @driving4answers for awhile now. I'm attracted to intelligent men, especially when they are as good at communicating, as he is. He is totally capable of surprising my own intelligence, and challenging it when it needs to be challenged. I'm just saying, big wrinkly brains are sexy. I shouldn't smoke weed before i write comments

@NortheasternP.T.S.

2 ай бұрын

@@jetcitykittywhat the hell…

It is also worth mentioning, that air at about 10 km altitude is usually very cold which helps a lot with efficiency.

@Tornado2409

5 ай бұрын

hence why race cars have intercoolers

@makantahi3731

5 ай бұрын

hottest air is on higher altitude, that is why is up, not down , because is lighter, if you take 1 cubic meter of air from 12km in sealed syringe, on sea level it would have less volume and higher temperature than local air on sea level

@OldSchoolZ-wy2yx

5 ай бұрын

​@@Tornado2409some use the A/C to cool down the intercooler too and I think that's awesome

@NavyVet4955

5 ай бұрын

@@makantahi3731that maybe the most ignorant post concerning air pressure I've ever seen.

@gort8203

5 ай бұрын

@@makantahi3731 Your sentence is unintelligible, but if I read it correctly you are mistaken. Air from 12 km high is less dense than sea level, but it is colder, not hotter.

Once you start calculating stage efficiencies and blade angles in gas turbines, that’s where the real fun starts :)

@michaelbrinks8089

5 ай бұрын

I can only imagine....blade shapes, blade angles, blade spacing/number of blades used, distance between sets of blades, stator shapes, stator distance, combustion chamber shape/ size....The list goes on, to determine which design works best overall= driving yourself crazy 🤪 🤪

@Blockbuster2033

5 ай бұрын

@@michaelbrinks8089 One would need to have a good simulation program that then could automatically go through thousands of iterations to optimise various parameters and converge on the "best" design for a specific task.

@pruthvirajbhople

5 ай бұрын

Blade and stator: Cross-section Shape Size Angle Curvature Thickness Spacing Material Surface texture Weight Bending moment Efficient RPM range These things are on top of my mind Add more if anyone know/think of more

@Soupy_loopy

5 ай бұрын

For real. I love it how 50,000 people think it's so easy now after watching a 16 minute introduction to jet engines.

@renesisfd1

5 ай бұрын

​@Sqeeze_da_cheez people aren't thinking that. It's like any topic, the theory and basically of operation are simple when explained well. When it comes to actually making it thats when it becomes complicated.

Every time I think I know all about something mechanical, here comes D4A to show me how little i actually know :D

@d4a

5 ай бұрын

I'd like to like your comment but I'm not going to support a claim to the lack of your knowledge, which I believe is unfounded :)

@eTiMaGo

5 ай бұрын

@@d4ayou are too kind :D We just love things that make us go fast! I was about to ask for more details about high-bypass turbofans, but you covered this right at the end... really interesting stuff!

*ONE OF THE BEST DAYS OF MY LIFE* was a private tour and explanation at the Rolls Royce Jet Engine plant at Derby in the UK - absolutely amazing They GROW the turbine blades as a single crystal of titanium...!!! Also they don't compress the air in the RR engines, they keep the pressure the same and increase the VELOCITY, this lowers the temperature of the combustion I believe.

@Sir_Cactus

5 ай бұрын

You are correct, gas pressure in the combustion chamber should be atmospheric, it is indeed velocity what is needed. In fact the only reason why the compressor is there is to prevent the exhaust gases from going back through the intake. After the compressor, there even is a diffusor (even in his model), where the intake air gets expanded, reducing it's pressure.

Actually turbojets do struggle more at high altitude than at low altitude. Air density is the prime determinant of how much thrust the engine can develop, so thrust drops with every foot the aircraft climbs. Transport aircraft get around this by flat-rating their engines. At low altitude the engine can actually produce more thrust than than it internals can withstand, so the throttle is only advanced as far as that limit. As the airplane climbs and air density and thrust drop off you can increase the thrust lever setting to work the engine harder and continue to produce sea level thrust with reduced air density -- up to a point of course. It is somewhat analogous to managing manifold pressure in a supercharged piston engine. At low altitude the turbo can deliver more MP than the engine can withstand, so you have have to throttle the engine back until you reach the critical altitude where you are working it at max capacity.

The turbine wheel in your jet engine is installed in the wrong orientation! Except for that: As usual with you, a brilliant video! 🤩

@jhgrc

5 ай бұрын

exactly I was to write about this - but checked if someone else had noticed.. :) This orientation causes compressor to rotate wrong way round..

@DCDrCoyne

5 ай бұрын

​@@jhgrchaha same

@indiglowpufferfish1002

5 ай бұрын

Agreed his stator on the power section is backwards as well. Great content but kids learning this for the first time will get some very bad misconceptions about the power section.

I'm will be going to recommend this channel to my future son🙏

Aircraft mechanic here, just a note. While what you described is in fact a turbo-jet, was was used on aircraft in the past most airliners today use turbo-fans for turbo-props. Basically the turbine is just a torque producer to run a big ducted fan or a propeller. think of Dash-8, it is turbine driven but they don't produce thrust, only torque for the props.

@d4a

5 ай бұрын

Hi Aircraft mechanic, yes, I mentioned this at the very end of the video. This is an ancient design but it's there to explain the basics.

@indiglowpufferfish1002

5 ай бұрын

​​​@@d4aalso aircraft mechanic here the power section blades stator and rotor look backwards on your model. The engine would be operating backwards in that configuration. Might warrant a reupload to prevent confusion. But definitely fix if you are using that model for teaching purposes in future videos.

@onefastneonrt

5 ай бұрын

​@@indiglowpufferfish1002I thought too. If the turbine blades were to spin in it's correct rotation, the compressors would be directing airflow the wrong way.

@tturi2

5 ай бұрын

​@@indiglowpufferfish1002the orientation of the blades is a few more levels advanced than this video really needs

I'm currently in college to become an aviation mechanic and just finished my semester on jet engines and am about to finish piston engines and graduate. You have done a beautiful job of explaining this, keep up the good work. Also if you have any questions on jet engines in the future I'd be happy to help

@pruthvirajbhople

5 ай бұрын

I always wanted to make a turboshaft motorcycle. Where can I source a small turboshaft engine? I believe they are being used for power generation and helicopter, any other application of turboshaft that I'm unaware of? Any brand name/engine model you can suggest which is small enough to fit in motorcycle chassis?

@richardlewis4288

5 ай бұрын

Good luck on your career choice. I’ve been an aircraft mechanic (A&P) for the airlines since 1983 and loved it.

@brianb-p6586

5 ай бұрын

If you think that was a good description you should go back and review your course material, particularly looking for information on the diffuser stage between the compressor sections and the combustors, and on the temperature, pressure, and velocity of the gas as it goes through the engine... since all of that is wrong in the video.

@theairaccumulator7144

5 ай бұрын

​@@pruthvirajbhople something like that would have a price tag in the tens of thousands & it would be much less powerful

@abraamsamor7418

5 ай бұрын

​@@richardlewis4288How's the pay? I'm also in college to be an A&P, except I just finished the first semester, so I still have a couple years left.

Please do more or this aviation stuff. I find it very fascinating, not least the final developments of large radial piston engines. The Wright engine used in for example the Douglas DC7 actually used turbo compounding with a turbine very similar in principle to the one you showed running off water. This turbine added power to the engine without taking any power from it..

As an aeronautical engineer "what a great video" love to see videos explained as easily

Good video! If you're going to diverge from cars, consider rocket engines as well. Non-air breathing, I mean. V2 development is interesting, and I'm always amazed by the fact that each of the 5 first stage engines of the Saturn booster had a fuel pump (of course) , turbine powered. EACH was 53,000 horsepower. The fuel pump. The actual engine power is hard to compare to any other machine made by humans. I'm a car/motorcycle nut, A&P mech, pilot...if it burns fuel and makes noise, it is interesting, sometimes amazing.

The CFM-56 engine found on Airbus and Boeing narrow body aircraft can exceed 120 miles/gallon/passenger. They can be very efficient.

What a great video, thank you so much! Please do continue with this turbine story line, will watch them all! 😊👍

Something to note, combusting the fuel doesent actually increase the pressure, as the pressure has to be lower in tye combustor for compressor air to be able to flow in. What it does is it takes the high pressure air, and increases the volume without decreasing pressure, you just get more of it.

@godfreypoon5148

5 ай бұрын

I was yelling at the screen about this.

@AfonsoBucco

4 ай бұрын

but, does it increases the speed of the air?

@godfreypoon5148

4 ай бұрын

@@AfonsoBucco Yes.

Man ive watched so many of your videos, they just seem to be getting better snd better the more i watch

Thank you so much for indulging in my request from your last video! I'm looking forward to the next installments of this series. One last thing, I don't want to be pedantic but at 6:50 you made a little mistake. The pressure doesn't rise in a constant pressure type engine like a gas turbine, the temperature and *velocity* of the gas increases.

@d4a

5 ай бұрын

Yes, a few things interconnected at the same time so it happened :) Maybe I should have worded that part differently and made it more clear that what I'm describing is the engine being fired up, hence the mentioning of the sparking. I'm basically referring to how all the steps increase the potential energy in front of the turbine. Obviously pressure increases with combustion in comparison to what it was before combustion started and then remains relatively constant since combustion is mostly constant. Hope it makes more sense now.

@IkarimTheCreature

5 ай бұрын

@@d4a It's realy untuitive, but the gas never increases in pressure in a jet engine combustor, since it is allowed to freely expand and speed up towards the turbine section where the speed is harnessed, and used in the compressor section to increase pressure. But your video makes it seem like the combustion chamber is what increases the pressure. If it did that the flames would shoot out the front and you would have a real mess. No one expects the pressure to peak at the compressor section, but at this point it feels like esotheric knowledge to most people, so it would be super appreciated if you could elaborate on this when you make a video about the crysler gas turbine or the olds mobile coal turbine cars. cheers!

@AfonsoBucco

4 ай бұрын

@@IkarimTheCreature talking about esoteric (or exoteric) knowledge, I confess I still feel it's counter-intuitive the fact you have less pressure in the middle of a venturi

You have a way of explaining this simply that makes this channel so enjoyable. Great job!

Please do more on jet engines🙏. I know this is an automotive channel and i’m asking too much but your explanation is on a whole another level.

@markam306

5 ай бұрын

You may want to look at the AgentJayZ channel. He is a jet engine technician who rebuilds them. Jay has extensive knowledge and the ability to convey it using normal english.

I grokked much of this already, but as usual, you reveal some interesting gems along the way. Bravo, sir! Rarely can I resist watching your videos.

Another fantastic, simple and clear explanation. Your understanding of the subjects you tackle at such a young age is impressive. Extra points for the opening sequence with the take off shot

As the gases burn in the combustor, pressure is reduced but velocity is increased. Also the narrowing of the exit nozzle is to maintain velocity and not pressure. Nuce video, as always! 👍👍.

Your timing is crazy, I was looking into jets just yesterday!

@richardconway6425

5 ай бұрын

What did you see?

I needed this guy growing up. Great quality content and amazing to the poin explanations. You have the hearts of many people.

Even if I think I know how something works I still watch your videos because every time I learn something new, keep up the good work

Such a quality, detailed and approachable explanation. I am not a car guy but I find mechanism and engineering fascinating, and the channel has been wonderfully empowering so far :)

Now this is just fascinating! And your style, Sir, makes it all so beautifully digestible. Oh my... love it, thank you!

Thank you for teaching me in 15mins things I’ve tried to understand for years, as always

this was awesome! I was hummin and hawin the whole time. I love learning mechanical things from this channel, thank you!

As always, thanks for this super well done video. Absolutely fantastic is your way of explaining. You could talk about any subject you are passionate of, and people would appreciate for sure. I really like your channel, and I wish you all the best, you deserve it💪

So well explained as usual. You make complicated processes so easy to follow. Cheers mate.

Videos like this are why I always get excited when I see your notification.. love it

It took my uni 1 year to explain the turbojet engine operation. You did it in 20 minutes. Thank you for your work! I hope it will be useful to a lot of people.

As always, your explanations are well illustrated and easy to understand even for those that are not engineers. I appreciate your content as always. Thank you D4A. You're the best

Some of the best content on the web ... Excellent ..!!! Thank You for sharing.. Cheers :)

Amazing video man, what a great piece of work.

Not sure how I've never come across your channel till now. Only a couple minutes into the video but you've got a new sub, very well explained.

Thankyou ❤ Your way of explaining these things make them easy to understand. Can't wait for the future video about more modern jet engines.

wow i was just searching this subject and well well looks like our favorite automotive engineering youtuber just posted it, how perfect is that lol. out of all of the videos ive just watched you explained it in the most understandable way possible.

This is the best channel on YT right now. Absolutely addicted.

I love this channel. Great work, bro! ✌️

thank you for the simple concise way you explain the material i wish all schools taught this way

Love this new direction you’re taking the channel.

Amazing video, I would love to see more, you can make seemingly complex topics easy to understand and provide great learning experience. Thank you :)

We need to take a moment to appreciate the timing of showing the bike exhaust pulses to showing a plane taking off in one unbroken shot while narrating. Very much reminds me of the 1978 connections episode where James Burke pointed at a rocket and it launched. Very well done, you had one chance to get that shot or hours/days of waiting for another!

Yes please explore more modern engines!! This was fantastic! Great work!

Amazing! I just shared it with all my pilot friends. Can't wait to see other videos on jet engines..

You are a great teacher, clear and to the point. Thank you!

Echoing others, I finally understand the JE principle and process. Yes please, a JE 102 video, bypass, ram, scram etc🙏

Ok, i love the explanation of the thrust part of the unused heat. Makes a lot more sense why jets are designed the way they are! You are an amazing teacher!

Great work at the opener getting the jet take off timed with your video. Bravo

Thank you I got this channel recommended from Instagram now im hook keep up to good work

What a great Professor! Thanks for sharing your knowledge and your talent.

I’ve been interested in aerospace engineering for my whole life and I’ve studied in so many aerospace classes, both highschool and college level. I’ve never seen a better explanation of jet engines. I also never knew jet engines had stators. Well done!!!

Fantastic concise explanation and excellent graphics, would love to see more on jet and other engine types from you!

Great video. Actually it's the best I've seen - explaining in Details how met engines work. Keep up the good work

Always love your videos, great explanation and now i know :D

I remember all the science magazines in the eighties telling us that "very soon" all of our cars would use turbines and that they'd be getting 100 mpg or more. Turns out there were many issues that were unsolvable, such as how to pipe the very hot exhaust gases away from the vehicle in a practical and safe way. Another big issue is that turbines tend to have very slow throttle response, making them not very fun to drive. But, I think they would be perfect for range extenders for electric cars because quick throttle response is not needed.

top marks, your videos are always very interesting

Thank you very much for such an educational video! I liked how you started the story with an example of a motorcycle engine, being near the airport, and then near the water turbine!

This is an amazing video, you explain so well!!

Man you are always finding interesting topics for us to learn about,get job as always !!!!!!

Jet engines were my first and foremost fascination, so I knew their workings well before a piston engine. Regardless watching this because you were presenting was a treat! Hats off to your great videos.

Stunning production, charismatically presented - thank you

This is really well made dude! Love your stuff. Looking forward to more jet tech like the new turbofans

Love your videos. You are an amazing teacher! Your amount of knowledge is staggering and the way that you present it is easy to absorb. I can onky think that if all my college professors were like you, I would've ended up being an engineer like my father instead of giving up after an associates degree. Keep up the amazing work and wish hou nothing but continued success with your channel

This is exactly the video series I need. I've been wanting to build my own jet engine for a while now. I understand the operating principles, but there are always little tidbits that I miss in the operations of things and hopefully this will clear them up.

Super excited for the jet engine / turbofan / turboprop series!! Don't keep us waiting too long 😊🎉

Confirming once again why D4A is the best engineering channel on the interwebs or anywhere for that matter! Utterly brilliant explanation & illustration!

Love your videos, you explain things so thoroughly

You're the ULTIMATE TEACHER when it comes to machinery and mechanics.

Love the additional content. Bringing jet engines in is great!

The best explainer of piston v jet engines. Well done.

Excellent commentary well done another great show

That intro was very very good sir, timing perfect 👌

Great video Sir! Very well explained and at a perfect level, which suits an audience with a wide range of engineering knowledge! Thanks for sharing! 🙂😎🤓

I was waiting to comment on high bypass fans to use more of the excess energy and then bam, right at the end you covered it nicely completing the video. Well done.

Excellent description. I have been trying to explain the turbojet and turbofan to my son today on a whiteboard.

That was a pretty slick transition from the bike exhaust to the jet taking off.

very informative. always wondered how it worked. Now I know. Thanks for such clear concise information.

The timing on that intro shot was immaculate

Top fuel dragsters actually DO use the thrust of their piston engine's exhaust to contribute to down force or propulsion, but most often a combination of both.

Brilliantly taught! What great teachers do, they take a piece if knowledge that is apparently inaccessible and opaque, and crack it open, and make it not scary--so that the student can climb into it and understand it for themselves. Thank you for doing that. I know it's not easy.

Very interesting. I for one would love to see more videos on aviation engines, of the jet or piston varieties.

Fascinating, as always.

The airfoils on the compressor are also diverging. This slows down the air which is what actually compresses it. The case volume in the compressor is converging to help the air move faster. Air in a jet compressor is subsonic and plays by subsonic rules.

Thanks for this video, I never understood even the basics of a jet engine until now.

Loved every syllable. Thanks.

Even though the jet engine illustrated in your video is obsolete, it gives a great insight on how jet engines work. I learn a little more each day with your videos. Thank you so much.

Thanks to this man and youtube. I would be a better mechanical engineer if these types of content were available when I was studying. ❤

This is a good intruduction video. I just want to correct that the combustion only needs ignition for startup, during operation the burning is self sustaining. One more thing that I want to say is that the burner does *not* increase the pressure of the gas/air in a jet engine. The pressure ideally stay the same as the pressure after the compressor, but in a real engine it has some drop in the combustor. It need to stay lower than the compressor end pressure or the flow would reverse in the engine. What the burning increase is the *volume* of the gas when its temperature increases. Then in the turbine the speed/pressure of the flow is partially converted to power. More power is made in the turbine than it is put into the flow by the compressor because there is more volumetric to the turbine when the temperature of the gas is increased.

Pressure is NOT increased in the combustion chamber of a gas turbine. Temperature and volume are increased during combustion. The pressure after the combustion chamber is the same like the pressure after the compressor. This is the reason gas turbines are not efficient under partial load or even worse when idling. A certain speed is need to get a good compression. In a piston engine compression is given mostly by the geometry and can further easily be tuned to different conditions by valve timing.

Great explanation! Love your channel!