Great video cpt, If anyone here has not booked your call with cpt Joe I highly recommend you book it, I done it and was easly the best aviation chat iv had in years ⭐⭐⭐⭐⭐. Joe is a extremely passionate pilot that has the experience to help out new pilot's or answer any questions you may have. You can book the call in the description.
I'm an aeronautical engineering student and I have airbreathing propulsion exam tomorrow. Capt Joe uploaded this on the right time 😭😭😭 Thank you so much Joe.
Oh boy! I totally messed up my Propulsion & Performance Exam and still don’t know how. I’m glad I have still passed the semester though! 😅 Good luck to you, mate! 😁
My first plane ride was on a Constellation four engine prop. The noise was incredible and hearing others talk was difficult. Today’s engines sort of hum and what a difference!
Indeed. It's the most famous and technologically advanced airliner ever made, anyway. He's (yes "le" Concorde is a "he" here in France) out of competition in many discipline. It was also the first airliner with complete fly-by-wire, FADEC engine management (albeit using analog computers, so technically it was the one and only "FAAEC" system), and rocket-technology-derived inertial guidance autopilot....
I agree that the Olympus 593-powered Concorde should be at the top of the list, but I’d add the A12 / SR71 to the tally. Yes, I know the J58 is a ramjet hybrid but it’s also a constantly-afterburning turbofan so it counts in my book. Concorde might be more famous but I’d argue that the J58 is the most amazing air-breathing aero engine ever created, especially the speed-adjustable bypass, variable-geometry intake cones and the hypergolic afterburner ignition system. The variable intake ramps on the Olympus 593, albeit amazing, are slightly less sophisticated. NB. I’m pretty fortunate in that both these aircraft sit in Duxford Imperial War Museum, 10 min drive from my home.
@@filipkonopacki1547 being a great fan of both planes, I have found a way to love both without competition. Concorde is the most famous and most formidable civilian airliner. The Blackbird is the most famous and most formidable military plane. There. Both the best in their domains.
Captain Joe has taught me too much, I really do hope to become a pilot in the future, I wish for nothing else except the experience of flying on a plane. So many things happening all at once, it's just fascinating. after watching almost all of your videos I realized how little I knew about aviation in general.
If I remember correctly, the initial design came from the turbochargers used on piston engines (to help efficiency and power at higher altitudes). Then someone had the idea to just take out the piston engine and just feed the fuel in. And fun fact, the M1 Abrams tank actually uses a jet engine instead of a traditional one with cylinders.
@@wcvp It's more like the earlier ideas that resulted in piston engine turbo chargers were the same ideas that resulted in turbojets. The basic axial turbojet engine was first sort of partly cobbled together around or before 1900 by Parsons (Ireland / North England) while doing steam turbine power generation machines. A bladed multi stage axial steam turbine coupled to a axial bladed multistage compressor. Then Parsons did some work on the idea of putting combusters in the middle instead of using steam. People at the time were thinking about it's use as an aircraft engine. A French chap came up with the basic axial bladed multistage turbine idea around 1875.
I Have joined a flight dispatch team recently and started working on myself to learn more and more about flight planning and aviation in General , I really enjoy every moment i spend watching your amazing educational vids, interesting and rich of knowledge. Thank you Capt for your efforts.
I have recently started playin flight simulator, hence attracted by Joe’s videos. And most of my questions were answered 3-5 years ago. I’m amazed that the Captain can provide interesting contents frequently after all these years. Kudos to u!
@@flywithcaptainjoe Video idea: Could you and Mentor Pilot play Roblox Pilot Training Flight Simulator together?, It could be a great video as the both of you would fly plane's and just like how it is done in real life, I do mention that the game is filled with idiot's but maybe they will be forced to be serious when you guy's fly the plane's.
Great video! That explanation of how a turbo engine works - in particular Suck Squeeze Bang Blow - even I could understand and I’m about as far from being an engineer as it’s possible to imagine. I’ve soon got lost when I’ve listened to other explanations, but Joe is such a great teacher I enjoyed this video because I could follow it!
The most iconic turbojet is the Concorde. They didn't really have a choice, for supersonic speed they needed the thrust to be of very high speed air, not of high mass of air, so a turbofan wasn't really an option.
That's correct and not a lot of people understand it. The faster you want an airplane to fly the higher the speed of the accelerated air has to be as it leaves the back of the engine. That's why a propeller engine that only accelerates air backward at about 400mph can't propel an airplane forward at 600mph. To do that you need a jet engine that can accelerate the air backwards at about 700mph or more.
@@NiHaoMike64 The fan will improve the low altitude, low speed performance of the aircraft. Then the core will take over and accelerate the airplane up to supersonic speeds.
I agree about the Concorde being iconic, but it’s engines are hidden from view. For this reason I’d nominate the Boeing 707 as the most iconic turbojet.
@ Joe Vignolo Not quite. For example, the gas flow in the J-58 in the SR-71 is entirely subsonic even though the plane is flying at Mach 3. The thrust comes from the high pressure and expansion of gasses inside of the divergent nozzle. A single stage fan simply can’t generate those pressures out of the fan duct.
Thanks for the video! Love your technical content. Best explanation of angular velocity I ever heard. As a trained metallurgist, the materials that somehow survive service in turbofan jet engines boggle my mind. Maybe a future video? 😉 Thanks again!
I really love the noise of jets spooling up; the loudest I've ever heard was a de Havilland Comet 4 built in 1963, which until 2019 used to do fast taxi runs at Bruntingthorpe airfield in Leicestershire; you could walk so close to it during engine start-up (RR Avon turbojets) that I could feel the noise vibrating through my body! It's still there, alongside an HP Victor, but they don't do taxi-runs anymore, as the runway's been turned into a massive car park. I think their EE Lightnings still do engine runs occasionally though. Although I used to live near Heathrow, I've never stood as close to Concorde during spool-up (Bristol Siddeley turbojets, later known as Rolls-Royce), so I can't compare it.
Hi, I have worked for Safran Aircraft Engines for a while. By the way, thanks or the appreciation of our work 😃 To give extra information on your very good video: - You mention 80% of the thrust comes from the cold air (bypass). The order of magnitude for the leap is around 65%, and 70% for our competitor if i'm not mistaken. But the general idea is indeed to get a bypass ratio as high as possible. The concept is that the hot air that comes from the nozzle drives the cold flux. Therefore, the faster goes the hot air, the faster goes the cold air as well. And as the cold flux represents 10x the amound of air coming from the hot flow, the thrust developped by this bypassed air is huge. One limitation comes from the fact that at some point, the hot flow is not strong enough to lead that much cold air, and you loose in efficiency. That's why we are desperately trying to increase the RPM of the shafts and fan, as well as the turbines' maximum temperature with composite materials. The goal is to rise hot flux's energy to be able to increase the Bypass ratio even more. - One limitation to even bigger engines is definetely their size: can't mount them under the wing; they disturb the flow over the wing as they get bigger and bigger; they induce more stress and bending moments on the wing as they become way too heavy; and so much stress is applied on the fan and other internal components as all parts become too big and tend not to rotate as fast as smaller ones ... We expect to be able to increase efficiency from a maximum of 10-15% compared to current modern jet engines in the following decade, but the next jet engine generation will require a new technology to go further. That's what the Open rotor is about for example. Bye
The SR-71 with it's J 58 turbo jet engine.is.probably the most famous jet with a non-fan engine. Great video as always and with me being one of the first group of F 16 mechanics (1979-1983) that shot of an F 16 with all 5 stages of burner lit still gives me chill bumps.
Thank you for this great video Cpt Joe - understanding the engines is one of my weak points when chatting in our AV community. I now understand the basic principles of an engine, how the bypass system works and has evolved, and the limitations of that system. Agree with you - total respect to engine designers etc. The info about the 777 engine being as wide as the 737 fuselage just blew my mind lol! Great content as always Joe, thank you!
Very interesting video! I watched many others on jet engines, but I still learned a lot from this one. I'm looking forward to watching others by Captain Joe!
I always knew how high bipass engines worked but I didn’t know why engines couldn’t go stupidly big due to the fan blades going faster on the outside so I found this really useful thankyou
I worked for and did and engineering apprenticeship with Rolls Royce so was aware of the tip velocity issue but the main issue with the engines we made was small size needed in helicopters. You couldn't just make them bigger to get more power and you reach a physical size that you can't go below with the HP compressor blades as they don't work. The pressure ration in a helicopter engine was pathetic compared to a much larger engine. To get round that the HP compressor is centrifugal running at mind boggling rpm.
The most famous turbojet aircraft: Lockheed SR-71 Blackbird. The engines at subsonic speed were indeed a turbojet. But above mach 2, it became a hybrid engine (well it was called turboramjet), and it's fuel efficiency increased.
I'm not entirely sure of my answer, but for me the most famous turbojet aircraft is the SR-71 Blackbrid, which was powered by the Pratt & Whitney J58 engines. Those were some mighty engines.
Famous turbojet: I have to say the early Boeing 707s with the JT3D turbojets. It's amazing what Boeing has done to the 737, which today resembles a twin-engine 707. I miss the classic Boeing 747 "buzzsaw" sound with its P&W JT9D taking off.
@@mrcannotfindaname You are correct. however the first Boeing 707s had the JT3C, which was a turbojet, which was upgraded to the JT3D turbofan. Some links: en.m.wikipedia.org/wiki/Pratt_%26_Whitney_J57 en.m.wikipedia.org/wiki/Pratt_%26_Whitney_JT3D That’s why I nominated the 707 as the most iconic turbojet. (The engines in the Concorde were hidden in the wings!).
Makes me think of the way we intake our breaths and blow out at different speeds and power. Just like wind when it blows through mountains closer together, the wind blows stronger creating a bottleneck squeeze. The smaller the space the more power it creates. Taking in large amounts of air and squeezing it through smaller area creates power. So cool to hearing him explain this!!!!
Having been fortunate to fly long haul from Birmingham (UK) to Barbados, a 9 hour flight, I just loved the Boeing 787 dreamliner's Rolls Royce Trent 1000 engines. They seemed soooo quiet even at max power on take off. As I understand it, they are also quite fuel efficient too
@@kenbrown2808 Military geeks will say SR-71, most non av geeks will say Concorde bc it’s basically a household name of an aircraft, WW2 geeks will say the Me-262, remember, we’re talking abt turbojets not prop planes. It all just depends on the person really. Personally I instantly thought of the Blackbird. I just adore it.
@@soup1029 it all depends on how you ask the question. if you ask for the most iconic passenger jet, you will probably get a tossup between the Concorde and the 747. if you ask for the best known, this week, you might get the 737 MAX. if you ask for the first jet people think of, Learjet might make a strong showing.
Love how turbo fan’s create a majority of the thrust, reduce noise and create a cooling effect for the core of the engine. So simple, yet brilliant! (The acceleration of the turbo fans air via the Venturi effect, again … awesome)!
Nice video Captain Joe! I used to wonder why the engines on 737s that were manufactured in the 1970s were smaller than the ones manufactured today. Thanks for answering my question!👍
Extremely nice and well perceivable presentation. When I watched your videos about landing, instruments, etc, I thought it is going to be all that a pilot does. However, never guessed there is a great aeronautical engineer in you as well. Congratulations.
The most famous turbojet aircraft I can think of that would be related to this channel would probably be the de Havilland Comet. Opening the door to a new age of air travel while teaching important lessons about the challenges of having a pressurized cabin. Unfortunate that they were such hard learned lessons.
Captain Joe has an amazing way explaining airplanes. I am not an engineer but he has a knack of teaching laymen in a very simple way. Great teacher and what a smile. Wonderful
You forgot about the triple shaft technology of the RR civil engines. This decoupled the Fan from the the LP compressor allowing better rotor speed management.
@@Bartonovich52well, there is always a trade off. An engine is a compromise between a lot of factors. On top of that, there is a difference between the theory and the practice. For example the Gear Turbo Fan ( or GTF) is a good idea but difficult to realize. Like N1 vs EPR, etc. It’s the same for the size of the engine. A bigger fan is good for takeoff, but it generates a lot of drag during flight.
The Concord was the most well known Turbojet engine aircraft. And, the most loved and missed. Enough to make me actually cry when I saw on T.V. the last one land, thereby bidding a farewell to a dream I will never have the chance to fly on.
Noob Aerospace Systems student here struggling to understand why bypass air provides more thrust than the core air. After so many informational videos, yours is the first to answer & explain it in a manner I can finally understand. Should've just looked up your channel first, considering I'm a Follower!
As much as I loved and miss the Concorde, the 737 will always be an icon and that it was first rolled out with my favorite airline Lufthansa! The haircut will have to grow on me Joe :). Great video as always!
I'm guessing your over 40, prob closer to over 50. I'm 44, love aviation and have 6 close family members in the airlines dating back to the 60s and 70s and didn't know of the comet until fairly recently. How many people in the world under 40 know what a "de Havilland Comet" was. It's so famous you can't spell the actual company that made it. I'm just saying the average person (especially nowadays with all the bad wrap in the news), knows and has most likely been on a type of 737, making it the most famous. Not the first, best, fastest, or maybe iconic, but the most famous ie well known. I understand why you would say that. This is what's wrong w America. Giving our opinion on stupid shit that doesnt matter on the internet with people we don't know while thinking we're right about an opinion. Lol. Hope you have a great day man. Safe flight
The PW GTF's are awesome!!! We, F9, just took delivery of our first 6 A321neo XLR's with the PW 1130G-JM GTF's... They are extremely quiet at idle. When you are standing 90 degrees from the inlet, you can not hear them running.... Most of our A320 fleet is running the GE LEAP's which are nice too. We even have a few A320/321's CFM56-B's, but we're phasing them out with the neo's...
IMHO, the Messerschmitt ME 262 is the first plane that comes to mind when you ask "What's the most famous turbo jet aircraft?". It revolutionized aircraft propulsion.
Great session, illustrated by great animation clips. I was wondering at what approx. altitude the jet fans start to receive the bypass air ? in other words when can no longer supply the LP compressor with intake air ? Now you know why the aircrafts like cold climates ( air density at higher altitudes)
as a person that usually watches nail and makeup videos, I have no idea how this channel came up on my algorithm but I am now completely hooked and have been binge watching for days xd I love flying but who knew how fascinating it all was!
Great video as always! I'm an Aviation enthusiast and Mechanical engineer by profession, your video always inspires me @Captain Joe. I think Boeing 707 and BAE Concorde are the most famous Turbojet powered aircrafts!
Amazing details in this video. This amount of mass per second were mind boggoling. I knew something have to going backward and fast and it create thrust. Those kilos give ideas the mass flows. An one cubic air weight circa 1,2kilos at sea level. Fl-370 fraction of that. The plane moving faster and more air going trough the bybass channel. But weight less because of low airpressure. That was very nice video. Thanks Captain Joe💝
The explanation why lots of bypass flow is so important for lots of thrust (80%) is excellent. As an engineer, I would have preferred, in addition, at least a reference to Issac Newton and especially his third law (for every force/reaction there must be an equal and opposite force/reaction). The fan produces thrust exactly the same way a rifle recoils against your shoulder when it is fired except the fan is a continuous process. The rifle spits a bullet (that has mass) out the front and a fans spits air (that certainly has mass) out the back. Imagine how much force it would take to physically throw the mass of a car out the back of the engine every second. The same force propelling the equivalent mass of a car aft must be applied in the opposite direction to the engine (through the fan blades) and that is what pushes (thrust) the airplane forward. More air (a bigger fan) means more mass, and that means more thrust just as a more massive bullet (and bigger charge) makes for a bigger black and blue mark on your shoulder. Also, do not underestimate how heavy (massive) plain old air is. A one inch square column of air the height of the atmosphere weighs 14.7 pounds. Collect and compress literally tons of it through that huge fan blade in the front of the engine and you have lots and lots of mass being thrown out the back. My GF tells me she never asks me what time it is as I respond by telling her how to make a watch. I hope this is not construed the same way.
That "car" is thrown out with a speed of roughly 900-1000 km/h, so imagine a Boeing 777 throwing out _two_ cars per second at that speed, or an A380 throwing out _four_ somewhat smaller cars per second.
I was taught in fundamentals "fundies" in the USAF for crew chief school that a jet engine doesn't push....it pulls. The explanation: The turning/burning engine produces expanding, hot, high pressure, high velocity air exhausting it out the back (what is it pushing against?) This hot, expanding, high pressure air wants to become low pressure again thus the fan is essentially pulling the aircraft/engine forward gulping in the low pressure air. I'm not saying that's what's happening as I don't design these but that's what I remember being taught in 1989 when I joined the USAF and was an F-16 crew chief.
Concorde gets my vote. Captain Joe, great information packed into every video. Keep it coming! Have you ever done a video on laminar flow? Very interesting, fuel efficient stuff. Fly safe my friend 👍
Great video cpt, If anyone here has not booked your call with cpt Joe I highly recommend you book it, I done it and was easly the best aviation chat iv had in years ⭐⭐⭐⭐⭐. Joe is a extremely passionate pilot that has the experience to help out new pilot's or answer any questions you may have.
You can book the call in the description.
🤗👌🏽😇
Oh nice. What part of the description to book the call have not seen it
pl
He’s amazing
I'm an aeronautical engineering student and I have airbreathing propulsion exam tomorrow. Capt Joe uploaded this on the right time 😭😭😭 Thank you so much Joe.
Oh boy! I totally messed up my Propulsion & Performance Exam and still don’t know how. I’m glad I have still passed the semester though! 😅 Good luck to you, mate! 😁
I'm mechanical engineering student and we also have airbreathing propulsion exam this week. I'm shocked.
Good luck!
@@Tranefine thank you, fam
@@ltpi2621 thank you
Now “suck, squeeze, bang, blow” has a whole new meaning to me 🤪😂
its also how car engines work to
It is how something else works too😂
Not really@@747simmer4
Wb the hawk tua stage?
A good pilot is always learning.
A great teacher is always teaching.
Nice one
I would correct that to "A great teacher is always teaching himself before others"
A great teacher is also always learning
And learning.
My first plane ride was on a Constellation four engine prop. The noise was incredible and hearing others talk was difficult. Today’s engines sort of hum and what a difference!
I think the Concorde is a TurboJet... Therefore making it the most famous turbojetted aircraft
Indeed.
It's the most famous and technologically advanced airliner ever made, anyway. He's (yes "le" Concorde is a "he" here in France) out of competition in many discipline. It was also the first airliner with complete fly-by-wire, FADEC engine management (albeit using analog computers, so technically it was the one and only "FAAEC" system), and rocket-technology-derived inertial guidance autopilot....
Jettedturbo
I agree that the Olympus 593-powered Concorde should be at the top of the list, but I’d add the A12 / SR71 to the tally. Yes, I know the J58 is a ramjet hybrid but it’s also a constantly-afterburning turbofan so it counts in my book.
Concorde might be more famous but I’d argue that the J58 is the most amazing air-breathing aero engine ever created, especially the speed-adjustable bypass, variable-geometry intake cones and the hypergolic afterburner ignition system. The variable intake ramps on the Olympus 593, albeit amazing, are slightly less sophisticated.
NB. I’m pretty fortunate in that both these aircraft sit in Duxford Imperial War Museum, 10 min drive from my home.
@@filipkonopacki1547 being a great fan of both planes, I have found a way to love both without competition.
Concorde is the most famous and most formidable civilian airliner.
The Blackbird is the most famous and most formidable military plane.
There. Both the best in their domains.
@@Damien.D Une chose est sure c'est que LE Concorde était une merveille à la pointe de la technologie de son époque!
Captain Joe has taught me too much, I really do hope to become a pilot in the future, I wish for nothing else except the experience of flying on a plane. So many things happening all at once, it's just fascinating. after watching almost all of your videos I realized how little I knew about aviation in general.
It's mind boggling to me how they come up with this stuff in the first place. WOW, you did a great job of explaining it in simple terms.
If I remember correctly, the initial design came from the turbochargers used on piston engines (to help efficiency and power at higher altitudes). Then someone had the idea to just take out the piston engine and just feed the fuel in. And fun fact, the M1 Abrams tank actually uses a jet engine instead of a traditional one with cylinders.
@@wcvp
It's more like the earlier ideas that resulted in piston engine turbo chargers were the same ideas that resulted in turbojets.
The basic axial turbojet engine was first sort of partly cobbled together around or before 1900 by Parsons (Ireland / North England) while doing steam turbine power generation machines. A bladed multi stage axial steam turbine coupled to a axial bladed multistage compressor. Then Parsons did some work on the idea of putting combusters in the middle instead of using steam. People at the time were thinking about it's use as an aircraft engine.
A French chap came up with the basic axial bladed multistage turbine idea around 1875.
I wrote a paper about this for my physics class in high school. Been super interested in jet engines ever since!
Joe has a unique personality that defines him in a different way than others.. ❤❤
Keep growing keep flourishing
Very true
Yeah, everybody has his own personality. That's life.😉 Cheers🥂
I Have joined a flight dispatch team recently and started working on myself to learn more and more about flight planning and aviation in General , I really enjoy every moment i spend watching your amazing educational vids, interesting and rich of knowledge.
Thank you Capt for your efforts.
I have recently started playin flight simulator, hence attracted by Joe’s videos. And most of my questions were answered 3-5 years ago.
I’m amazed that the Captain can provide interesting contents frequently after all these years.
Kudos to u!
Thanks mate!!!
🤗👌🏽👍🏼
P
@@flywithcaptainjoe Video idea: Could you and Mentor Pilot play Roblox Pilot Training Flight Simulator together?, It could be a great video as the both of you would fly plane's and just like how it is done in real life, I do mention that the game is filled with idiot's but maybe they will be forced to be serious when you guy's fly the plane's.
Great video! That explanation of how a turbo engine works - in particular Suck Squeeze Bang Blow - even I could understand and I’m about as far from being an engineer as it’s possible to imagine. I’ve soon got lost when I’ve listened to other explanations, but Joe is such a great teacher I enjoyed this video because I could follow it!
The most iconic turbojet is the Concorde. They didn't really have a choice, for supersonic speed they needed the thrust to be of very high speed air, not of high mass of air, so a turbofan wasn't really an option.
That's correct and not a lot of people understand it. The faster you want an airplane to fly the higher the speed of the accelerated air has to be as it leaves the back of the engine. That's why a propeller engine that only accelerates air backward at about 400mph can't propel an airplane forward at 600mph. To do that you need a jet engine that can accelerate the air backwards at about 700mph or more.
Boom is planning to use turbofans in their supersonic airliner.
@@NiHaoMike64 The fan will improve the low altitude, low speed performance of the aircraft. Then the core will take over and accelerate the airplane up to supersonic speeds.
I agree about the Concorde being iconic, but it’s engines are hidden from view. For this reason I’d nominate the Boeing 707 as the most iconic turbojet.
@ Joe Vignolo
Not quite.
For example, the gas flow in the J-58 in the SR-71 is entirely subsonic even though the plane is flying at Mach 3.
The thrust comes from the high pressure and expansion of gasses inside of the divergent nozzle.
A single stage fan simply can’t generate those pressures out of the fan duct.
Thanks for the video! Love your technical content. Best explanation of angular velocity I ever heard. As a trained metallurgist, the materials that somehow survive service in turbofan jet engines boggle my mind. Maybe a future video? 😉 Thanks again!
I really love the noise of jets spooling up; the loudest I've ever heard was a de Havilland Comet 4 built in 1963, which until 2019 used to do fast taxi runs at Bruntingthorpe airfield in Leicestershire; you could walk so close to it during engine start-up (RR Avon turbojets) that I could feel the noise vibrating through my body! It's still there, alongside an HP Victor, but they don't do taxi-runs anymore, as the runway's been turned into a massive car park. I think their EE Lightnings still do engine runs occasionally though. Although I used to live near Heathrow, I've never stood as close to Concorde during spool-up (Bristol Siddeley turbojets, later known as Rolls-Royce), so I can't compare it.
Learning new facts every Thursday! "A good pilot is always learning" :)
Hi, I have worked for Safran Aircraft Engines for a while. By the way, thanks or the appreciation of our work 😃
To give extra information on your very good video:
- You mention 80% of the thrust comes from the cold air (bypass). The order of magnitude for the leap is around 65%, and 70% for our competitor if i'm not mistaken. But the general idea is indeed to get a bypass ratio as high as possible. The concept is that the hot air that comes from the nozzle drives the cold flux. Therefore, the faster goes the hot air, the faster goes the cold air as well. And as the cold flux represents 10x the amound of air coming from the hot flow, the thrust developped by this bypassed air is huge.
One limitation comes from the fact that at some point, the hot flow is not strong enough to lead that much cold air, and you loose in efficiency. That's why we are desperately trying to increase the RPM of the shafts and fan, as well as the turbines' maximum temperature with composite materials. The goal is to rise hot flux's energy to be able to increase the Bypass ratio even more.
- One limitation to even bigger engines is definetely their size: can't mount them under the wing; they disturb the flow over the wing as they get bigger and bigger; they induce more stress and bending moments on the wing as they become way too heavy; and so much stress is applied on the fan and other internal components as all parts become too big and tend not to rotate as fast as smaller ones ...
We expect to be able to increase efficiency from a maximum of 10-15% compared to current modern jet engines in the following decade, but the next jet engine generation will require a new technology to go further. That's what the Open rotor is about for example.
Bye
The fact that a 777-x can fix a whole 737 fuselage in their engines blow my mind 🤯
Yes. Thats biggest and most powerfull engine for commercial aircraft
Yeah I knew it but still can't make up my mind about that!
@@Damien.D ok.. engineering marvellous
Imagine a 737 with a 777 engine.
@@rocko44444444 The cockpit would be split in half and sucked in the engines at takeoff XD
The SR-71 with it's J 58 turbo jet engine.is.probably the most famous jet with a non-fan engine.
Great video as always and with me being one of the first group of F 16 mechanics (1979-1983) that shot of an F 16 with all 5 stages of burner lit still gives me chill bumps.
Thank you for this great video Cpt Joe - understanding the engines is one of my weak points when chatting in our AV community. I now understand the basic principles of an engine, how the bypass system works and has evolved, and the limitations of that system. Agree with you - total respect to engine designers etc. The info about the 777 engine being as wide as the 737 fuselage just blew my mind lol! Great content as always Joe, thank you!
Very interesting video! I watched many others on jet engines, but I still learned a lot from this one. I'm looking forward to watching others by Captain Joe!
It’s a great day when Capt. Joe uploads! 😃
Using this to help prep for my first airline interview with SkyWest this month and it’s helped so much! Thanks Joe!
I always knew how high bipass engines worked but I didn’t know why engines couldn’t go stupidly big due to the fan blades going faster on the outside so I found this really useful thankyou
it's the same reason prop driven planes and helicopters have a maximum airspeed.
I worked for and did and engineering apprenticeship with Rolls Royce so was aware of the tip velocity issue but the main issue with the engines we made was small size needed in helicopters. You couldn't just make them bigger to get more power and you reach a physical size that you can't go below with the HP compressor blades as they don't work. The pressure ration in a helicopter engine was pathetic compared to a much larger engine. To get round that the HP compressor is centrifugal running at mind boggling rpm.
Love your videos Capt.
Hatsoff 👏👏👏
For an aspiring pilot like me you are always on the youtube subscription list 👍
Cheers!
The most famous turbojet aircraft: Lockheed SR-71 Blackbird. The engines at subsonic speed were indeed a turbojet. But above mach 2, it became a hybrid engine (well it was called turboramjet), and it's fuel efficiency increased.
That what I thought of too; however, the Concorde is, no doubt, more famous to the general public.
I'm not entirely sure of my answer, but for me the most famous turbojet aircraft is the SR-71 Blackbrid, which was powered by the Pratt & Whitney J58 engines.
Those were some mighty engines.
Famous turbojet: I have to say the early Boeing 707s with the JT3D turbojets. It's amazing what Boeing has done to the 737, which today resembles a twin-engine 707.
I miss the classic Boeing 747 "buzzsaw" sound with its P&W JT9D taking off.
JT3D is actually a turbofan which has a low bypass ratio.
@@mrcannotfindaname You are correct. however the first Boeing 707s had the JT3C, which was a turbojet, which was upgraded to the JT3D turbofan.
Some links:
en.m.wikipedia.org/wiki/Pratt_%26_Whitney_J57
en.m.wikipedia.org/wiki/Pratt_%26_Whitney_JT3D
That’s why I nominated the 707 as the most iconic turbojet. (The engines in the Concorde were hidden in the wings!).
Makes me think of the way we intake our breaths and blow out at different speeds and power. Just like wind when it blows through mountains closer together, the wind blows stronger creating a bottleneck squeeze. The smaller the space the more power it creates. Taking in large amounts of air and squeezing it through smaller area creates power. So cool to hearing him explain this!!!!
Thank you for this very good lesson about the jet-engines! 😃👍 Of course the Concorde is the most famous turbojet aircraft! 😉
another amazing and insightful video Joe, nicely done!
Having been fortunate to fly long haul from Birmingham (UK) to Barbados, a 9 hour flight, I just loved the Boeing 787 dreamliner's Rolls Royce Trent 1000 engines. They seemed soooo quiet even at max power on take off. As I understand it, they are also quite fuel efficient too
I love the content. You have such a soothing tone, makes it better. Thanks for this!
The most famous turbojet is the SR-71 if turboramjets count, if not it's the Concorde
Rubbish ask someone if they remember the most FAMOUS aeroplane in the world they will mention the Concorde not the SR71
@@clyth41 you mean the wright flyer, the spirit of St Louis, the Enola Gay, or the Spruce Goose.
My wife says the spruce goose.
@@kenbrown2808 Military geeks will say SR-71, most non av geeks will say Concorde bc it’s basically a household name of an aircraft, WW2 geeks will say the Me-262, remember, we’re talking abt turbojets not prop planes. It all just depends on the person really. Personally I instantly thought of the Blackbird. I just adore it.
@@soup1029 it all depends on how you ask the question. if you ask for the most iconic passenger jet, you will probably get a tossup between the Concorde and the 747. if you ask for the best known, this week, you might get the 737 MAX. if you ask for the first jet people think of, Learjet might make a strong showing.
SR-71 has 9.9 billion results on Google. Me-262 = 7.4 billion. Mig-21 = 162 million. Concorde = 89 million.
Very interesting video. All of your videos are so informative. I appreciate all the hard work you do to prepare these videos!
Such a great work learning new things 😀
Love how turbo fan’s create a majority of the thrust, reduce noise and create a cooling effect for the core of the engine. So simple, yet brilliant!
(The acceleration of the turbo fans air via the Venturi effect, again … awesome)!
Nice video Captain Joe! I used to wonder why the engines on 737s that were manufactured in the 1970s were smaller than the ones manufactured today. Thanks for answering my question!👍
Extremely nice and well perceivable presentation. When I watched your videos about landing, instruments, etc, I thought it is going to be all that a pilot does. However, never guessed there is a great aeronautical engineer in you as well. Congratulations.
Once again a great analysis, informative and impressive session Captain Joe.
Turbofan/prop/fan physics: satisfying real world umphf! Thanks Joe!
I have worked for Rolls-Royce for Trent engines, and yes I can say, you've explained everything with super ease..
Our family love learning from your channel. This was another well explained video. Keep up the good work!
no offense but my brain went to a completely different topic at 2:45 ☕☕😭😭🗿🤣🤣😅😂🤣😂😅😅
BEST PILOT ON THE TUBE.CANT WAIT FOR NEW INSTALLMENTS,IM WITH YOU RADIO GUY ONLINE,SAME THINKING
The most famous turbojet aircraft I can think of that would be related to this channel would probably be the de Havilland Comet. Opening the door to a new age of air travel while teaching important lessons about the challenges of having a pressurized cabin. Unfortunate that they were such hard learned lessons.
Wonderful video and amazing explanation Captain Joe. Thanks for sharing.
I'm sure Joe is looking for the Concorde as the answer to his quiz but I'm saying the SR 71 even though some say that's a turboramjet.
It technically is a turboramjet and not a pure turbojet.
@@ChrisZoomER god bless Kelly Johnson for making the most legendary supersonic recon plane to ever soar the skies....
Captain Joe has an amazing way explaining airplanes. I am not an engineer but he has a knack of teaching laymen in a very simple way. Great teacher and what a smile. Wonderful
You forgot about the triple shaft technology of the RR civil engines. This decoupled the Fan from the the LP compressor allowing better rotor speed management.
At the expense of higher weight and complexity.
@@Bartonovich52well, there is always a trade off. An engine is a compromise between a lot of factors.
On top of that, there is a difference between the theory and the practice. For example the Gear Turbo Fan ( or GTF) is a good idea but difficult to realize. Like N1 vs EPR, etc.
It’s the same for the size of the engine. A bigger fan is good for takeoff, but it generates a lot of drag during flight.
Great video Joe! Always learning something new and you have a great visual way of explaining things! Cheers
The Concord was the most well known Turbojet engine aircraft. And, the most loved and missed. Enough to make me actually cry when I saw on T.V. the last one land, thereby bidding a farewell to a dream I will never have the chance to fly on.
Noob Aerospace Systems student here struggling to understand why bypass air provides more thrust than the core air. After so many informational videos, yours is the first to answer & explain it in a manner I can finally understand. Should've just looked up your channel first, considering I'm a Follower!
As much as I loved and miss the Concorde, the 737 will always be an icon and that it was first rolled out with my favorite airline Lufthansa! The haircut will have to grow on me Joe :).
Great video as always!
Great video as always! You always pull back the curtain so the general public understands what's going on behind the scenes!
I would say that the Concorde was the most famous Turbojet airplane that existed.
I have nothing but love for those videos. Great information, great delivery of it!
Much better graphics and lighting Joe! Keep up the good work.
I really like this type of videos and your explanation, thanks Captain Joe!)
The most known turbo jet aircraft would have been the Havilland comet. As it was the very first to exist as a commercial option.
I'm guessing your over 40, prob closer to over 50. I'm 44, love aviation and have 6 close family members in the airlines dating back to the 60s and 70s and didn't know of the comet until fairly recently. How many people in the world under 40 know what a "de Havilland Comet" was. It's so famous you can't spell the actual company that made it. I'm just saying the average person (especially nowadays with all the bad wrap in the news), knows and has most likely been on a type of 737, making it the most famous. Not the first, best, fastest, or maybe iconic, but the most famous ie well known. I understand why you would say that. This is what's wrong w America. Giving our opinion on stupid shit that doesnt matter on the internet with people we don't know while thinking we're right about an opinion. Lol. Hope you have a great day man. Safe flight
Videos from captain joe are always cool, inspiring, educational and entertaining, you have a great spirit and very smart. ✈️🌏🌎🌍✈️
All the best from RUSSIA for all CJ's subscribers!!!
The PW GTF's are awesome!!! We, F9, just took delivery of our first 6 A321neo XLR's with the PW 1130G-JM GTF's... They are extremely quiet at idle. When you are standing 90 degrees from the inlet, you can not hear them running.... Most of our A320 fleet is running the GE LEAP's which are nice too. We even have a few A320/321's CFM56-B's, but we're phasing them out with the neo's...
IMHO, the Messerschmitt ME 262 is the first plane that comes to mind when you ask "What's the most famous turbo jet aircraft?". It revolutionized aircraft propulsion.
Great video! I love that! Now I know how a jet engines works. Thank you Captain Joe!
The real question is when will airlines finally implement Rockwell Automation's Retro Encabulator into their engines?
Joe needs to explain it's operation first
Thank you for explaining this you definitely get a thumbs up.
I’m thinking Captain Joe has never heard the buzz saw sound of supersonic fan tips that happens in many turbofans.
The sound of inefficiency 😂
He's heard it all right, mate.
One of the best explained materials about jet engines for non engineers!
The Max and Neo engines look ginormous on their planes.
WELL done Sir! Fans and bypass thrust explained. Free horse power!
Great session, illustrated by great animation clips. I was wondering at what approx. altitude the jet fans start to receive the bypass air ? in other words when can no longer supply the LP compressor with intake air ? Now you know why the aircrafts like cold climates ( air density at higher altitudes)
On the ground, that is where they need the most thrust for takeoff, plus reverse thrust to land safely!
I believe the confusion comes from ALL the air going through the fan, and a small amount of air *after* the fan is drawn into the core.
as a person that usually watches nail and makeup videos, I have no idea how this channel came up on my algorithm but I am now completely hooked and have been binge watching for days xd I love flying but who knew how fascinating it all was!
Me: *marvels at the science behind jet engines
Kennedy Steve: *meh, huge hair dryers*
wow your studio back ground lighting is dope 👌👍🙏
You shoulf have complemented this video with a graph showing how efficient the engines have become.
This is the clearest explanation I have ever seen !
Love your videos. Possible to increase the volume? Always have to max out my TV volume when watching your channel.
Great video as always! I'm an Aviation enthusiast and Mechanical engineer by profession, your video always inspires me @Captain Joe. I think Boeing 707 and BAE Concorde are the most famous Turbojet powered aircrafts!
I love your new haircut joe!
Really enjoying the more posts recently. Nice video as well!
What a great video describing how a turbo fan works. I really enjoyed how you described the bypass ratio.
Excellent lesson on jet engines. Thank you Captain Joe.
Beautifully explained. Thank you!
I cannot tell a lie, But this is one of the best i mean BEST videos i have seen explaining the engines. Well done and thank you!!!
Excellent video, my ATPLS have been made a lot less tedious with your fantastic videos. Many thanks
Great video Joe 😎 Currently I’m studying Jet Engines and this video was perfect for me, Thank you!!!
@11:20 my co-workers and I thank you for the compliment! We hope the aviation industry is happy with the PW1100G family.
Amazing details in this video.
This amount of mass per second were mind boggoling. I knew something have to going backward and fast and it create thrust. Those kilos give ideas the mass flows. An one cubic air weight circa 1,2kilos at sea level. Fl-370 fraction of that. The plane moving faster and more air going trough the bybass channel. But weight less because of low airpressure.
That was very nice video. Thanks Captain Joe💝
Incredible understandable! Thank you!
This explanation is so clear, I got it at firt time, Bravo!
The explanation why lots of bypass flow is so important for lots of thrust (80%) is excellent. As an engineer, I would have preferred, in addition, at least a reference to Issac Newton and especially his third law (for every force/reaction there must be an equal and opposite force/reaction). The fan produces thrust exactly the same way a rifle recoils against your shoulder when it is fired except the fan is a continuous process. The rifle spits a bullet (that has mass) out the front and a fans spits air (that certainly has mass) out the back. Imagine how much force it would take to physically throw the mass of a car out the back of the engine every second. The same force propelling the equivalent mass of a car aft must be applied in the opposite direction to the engine (through the fan blades) and that is what pushes (thrust) the airplane forward. More air (a bigger fan) means more mass, and that means more thrust just as a more massive bullet (and bigger charge) makes for a bigger black and blue mark on your shoulder. Also, do not underestimate how heavy (massive) plain old air is. A one inch square column of air the height of the atmosphere weighs 14.7 pounds. Collect and compress literally tons of it through that huge fan blade in the front of the engine and you have lots and lots of mass being thrown out the back. My GF tells me she never asks me what time it is as I respond by telling her how to make a watch. I hope this is not construed the same way.
That "car" is thrown out with a speed of roughly 900-1000 km/h, so imagine a Boeing 777 throwing out _two_ cars per second at that speed, or an A380 throwing out _four_ somewhat smaller cars per second.
Very nicely explained. Thank you
I was taught in fundamentals "fundies" in the USAF for crew chief school that a jet engine doesn't push....it pulls. The explanation: The turning/burning engine produces expanding, hot, high pressure, high velocity air exhausting it out the back (what is it pushing against?) This hot, expanding, high pressure air wants to become low pressure again thus the fan is essentially pulling the aircraft/engine forward gulping in the low pressure air. I'm not saying that's what's happening as I don't design these but that's what I remember being taught in 1989 when I joined the USAF and was an F-16 crew chief.
Wow, I never thought of that. Guess that is a correct explanation, thank you!
Hey captain!... the answer to your question is the concorde as it is a turboJET driven plane.. BTW loved the video.. understood so much
I mean I'd argue that concorde is the most famous plane period, which ofc also makes it the most famous turbojet plane.
Great video and many love from the Caribbean
Concorde gets my vote. Captain Joe, great information packed into every video. Keep it coming! Have you ever done a video on laminar flow? Very interesting, fuel efficient stuff. Fly safe my friend 👍
Thanks. Good explanation for "is there a limit to the size, & and how to get around it" - something I never wondered about, but now I know!
What fuel is a jet engine have