Right!? I mean, great video. Very informative. But I’m not sure I’ve learned as to why jet engines are getting bigger (beyond the fact that planes are also bigger).
Both Jet engine and ship propeller work in principle of Jet which means causing force to other matter then that matter will cause a jet to thrust the jet engine or ship forward. The more jet you get the more effective. Specfic weight of water is much more than the air's is. So with evenly volume, the jet of ship propeller get is much more than the jet engine does so to get enough thrust force, the jet engine need to blow larger volume and it become bigger. From Vietnam
The aircraft of today can weigh 3/4ths of a million pounds or more! It takes a LOT of power to lift that much weight into the air, thus the necessity for larger and larger jet engines! Wait until we have hypersonic aircraft! Rockets will do the work of turbo-fan engines, I suppose! They will probably use fan-blade engines to take off with and then change to rocket power to reach Mach 5, because fan-blades would probably disintegrate at such high velocities, but it will mean we can get across the ocean in two hours, beating Concorde's 3.5 hours! Now how large those engines will be, remains to be seen, I suppose! While traveling at hypersonic speeds, you don’t need fan blades to compress air though, because the speed of the aircraft will do that for you. Imagine the sonic boom that aircraft will make!
The answer is that it is more efficient to accelerate a larger mass of air to a lower velocity to get the same amount of thrust, if you're in the speed range of something like 300-600mph, hence the high bypass turbofan with a massive ducted fan on the front. (Below this turboprops are better, when the propeller tips aren't going supersonic; above this low-bypass turbofan with afterburner used by military jets are more efficient, and above that ramjets.)
So jet engines are big because planes are big? And this explains why big ships have big screws? 🤷🏽♂️ Nothing about larger fan jets being more fuel efficient? High ratio bypass generating more power with less effort?
I used to work for Boeing at Everett plant in Washington State. The GE 9's used on triple 7's (777) are huge. Name GE might as well stand for Gigantic Engines, and the number 9 is for diameter of Main Fan. I have stood inside the engine cowling with enormous fan behind me. My house has 8 foot ceilings, the GE 9 would not fit in my house, part of it would be in the attic. Most of air produced when fan is spinning bypasses the compressor and flows around core. 85 percent of power comes from the high volume of bypassed air.
Good to see the different examples of not just jet engines (including various military fighter jet engines on test in a hush house facility) but also some boat props.
I thought ship propellers were generally made of bronze, not steel. Either way, molten metal does not 'cure' in the mould, it solidifies (phase change, not a chemical reaction).
_"Reason Why Aircraft Jet Engines Are Monstrously Large Today"_ It's all about bypass ratio, something you just skipped right over. Look at the GE TF39 and P&W JT9D.
This surprises you? They managed to exclude any actual facts about why jet engines are so large. They didn’t know that cast metal doesn’t cure. They got the metal wrong. How would they know about Frank Whittle?
I`m American and would like to see us go to metric. In the 80s there was an effort to make the switch. Call us hard headed I guess. I do not care for videos and other media that mix the metric and English systems.
Sub shaft assemblies along the rotational center of the engines with overrunning clutches connecting them and/or gear junctions? (So that parts of the assembly rotate at different speeds but drive one another ?
Just as I'd rather NOT go on an ocean cruise liner with 5,000 people aboard, I don't like traveling on a huge aircraft with 800 people aboard either! But there isn't a lot of choice today! I handle that by either taking a "red-eye:" or a very early a.m. flight. I thought the Concorde had a narrow fuselage, but it was a pleasure to fly it, and I really miss the "Queen of the Skies B-747! Those were the good old days!
The reason they need to be so big is because of the ultra high bye pass in the forward part of the engine. Now days the forward fan produces much more thrust then years ago.
When Napoleon was first told that coal based furnaces powering propellers would replace sails sometime in the near future he stated that “Please don’t waste my time with such nonsense”.
Jet engines are so large today because sailing vessels required elaborate rigging and multiple crew members in order to properly rig them. I’m not sure why so many of you are confused. Jeez, just pay attention, it’s free.
Forgot to mention that Sir Frank Whittle a British inventor a patent 1930 the engine was fitted to a Gloster E.28/39 the first flight was on May 15 1941 Americans did not invent the jet
Propellers are not made of steel! Bronze being the primary metal used with a close second being Stainless Steel, usually for high performance applications. In actual fact it extremely rear for a propeller to be made of steel.
Was thinking the same thing ... and as for "pounding into shape" those smaller investment cast props ... the script seems to indicate cursory research.
The Airbus A350XWB-900 and Boeing 787 Dreamliner are the currently Very Efficient Aircraft using most Technological Efficient Rolls Royce Trent 1000 and XWB type Engines that Are more Fuel Efficient and quite too. 3 and 4 engine Aircraft are slowly being phasing Out And replaced by the 2 Twin engines types.
the amount of twist on the fan blades, or on the ships screws, in water, you can see how the water flows best thru the blades, and therefore at which point of twist the thrust is the best, works with air too,
I’m guessing if the fan is bigger then greater efficiency and speed. The big question is what’s the limit. I know the biggest engines so far are in the brand new Boeing 777x. The 737Max has the biggest engines ever placed on a 737 airframe. This caused the airplane to have a tendency to unexpectedly nose up during takeoff as to why Boeing secretly added the MCAS which proved to be fatal in two crashes already.
Thanks for the video. But, I had no idea what the measurements were in feet and pounds. As most of the world uses the metric system, and you're on a global platform, perhaps you can cater to your worldwide audience?
So why are jet engines so large these days besides for countering the size and weight of the planes? Is there another reason? There must be….puzzled here too.
The fans provide most of the thrust, not the gases being expelled from the rear of the engine. The larger the fan, the more air can be moved to create more thrust. The turbines in the jet engine are mainly there to turn the fans. So, bigger engines equal bigger fans which equal more thrust to move heavier planes.
Jet engines are huge today because at one time, you had to have at least 3 engines to travel extended over water operations. Four was preferred and thought to be safest. However 2 large engines are CHEAPER to operate than 4 smaller ones. Not necessarily SAFER but CHEAPER. Which is of course the bottom line.
Question: Does anyone actually need to be told that the engines provide the thrust to power the airplane? If so, how could that someone possibly be smart enough to use a device to watch the video? Just asking.
Is the core of the CF 6 the same size as the core of the first J-57 in the 707 aircraft? The core of the J-57 was the J-57 plus cover and nacelle. The CF 6 core spins a large fan that blows air around the core and out the back of the engine coverings? Either the CF-6 or the RB 211 English engines used to be the highest bypass ratios made?
Interesting 🤔 but not that accurate. The material use in ship propeller is incorrect. The smaller boat propeller shown being cast used the lost wax process and not made from a wooden pattern. What about the British Meteor jet 1943 the first jet fighter, the British Commet the first commercial airliner 1949, or the British Harrier jump jet 1969 the first vertical take off fighter? 🤔
Too bad there isn't some kind of imperial to metric converter on the Internet for people that are too lazy to learn both systems of measurement...oh well...I guess you'll just have to continue complaining and never know...
Why is it that the whole world talks in meters and kilograms, yet America still talks in inches and pounds? Or are your videos only for domestic consumption?
Such a poor video! If you can't fill a mere 8:20 discussing all the reasons why Jet engines are monstrous today explaining the concepts of bypass ratio, correspondingly high OPR and turbine entry temp etc, then don't make the video. Get your views in another area that you know something about.
The way the lady said ‘seven seventy-seven’ instantly tells me she has very little to no aviation background. I’m sorry but hearing that made me cringe.
The narrative of your video are incoherent on the subject of your video. If we are going to direct to the point, the present large size of jet engine, in particular jumbo jet (two engines) evolve from the requirements of ETOPS .
There were several spoken technical inaccuracies in this video but the 225 is never mentioned OR SEEN AT ALL in the footage. The Antonov shown several times has 4 engines and a single tail, making it the AN-124. The AN-225 had 6 engines and a twin tail.
Still wondering what boat propellers have to do with why jet engines are so big today…
You mean talking about how ship propellers are made didn't answer that question? It was hidden deep in the water jet segment 😳
It was a better transition than last time at least.
Right!? I mean, great video. Very informative. But I’m not sure I’ve learned as to why jet engines are getting bigger (beyond the fact that planes are also bigger).
Yeah. Me too
Both Jet engine and ship propeller work in principle of Jet which means causing force to other matter then that matter will cause a jet to thrust the jet engine or ship forward.
The more jet you get the more effective. Specfic weight of water is much more than the air's is. So with evenly volume, the jet of ship propeller get is much more than the jet engine does so to get enough thrust force, the jet engine need to blow larger volume and it become bigger.
From Vietnam
This video has got me wondering... why are today’s jet engines so monstrously large? That might make for a good video one day.
The aircraft of today can weigh 3/4ths of a million pounds or more! It takes a LOT of power to lift that much weight into the air, thus the necessity for larger and larger jet engines! Wait until we have hypersonic aircraft! Rockets will do the work of turbo-fan engines, I suppose! They will probably use fan-blade engines to take off with and then change to rocket power to reach Mach 5, because fan-blades would probably disintegrate at such high velocities, but it will mean we can get across the ocean in two hours, beating Concorde's 3.5 hours!
Now how large those engines will be, remains to be seen, I suppose! While traveling at hypersonic speeds, you don’t need fan blades to compress air though, because the speed of the aircraft will do that for you. Imagine the sonic boom that aircraft will make!
@@mjleger4555 It was a joke. I was pointing out that the video never answered its own question.
The answer is that it is more efficient to accelerate a larger mass of air to a lower velocity to get the same amount of thrust, if you're in the speed range of something like 300-600mph, hence the high bypass turbofan with a massive ducted fan on the front. (Below this turboprops are better, when the propeller tips aren't going supersonic; above this low-bypass turbofan with afterburner used by military jets are more efficient, and above that ramjets.)
You´re absolutely right. The video doesen´t answer to its own question!
So jet engines are big because planes are big? And this explains why big ships have big screws? 🤷🏽♂️
Nothing about larger fan jets being more fuel efficient? High ratio bypass generating more power with less effort?
I used to work for Boeing at Everett plant in Washington State. The GE 9's used on triple 7's (777) are huge. Name GE might as well stand for Gigantic Engines, and the number 9 is for diameter of Main Fan. I have stood inside the engine cowling with enormous fan behind me. My house has 8 foot ceilings, the GE 9 would not fit in my house, part of it would be in the attic. Most of air produced when fan is spinning bypasses the compressor and flows around core. 85 percent of power comes from the high volume of bypassed air.
I learned more from you than I did her...
@@chraffis Thank you very much, very kind.
it’s General Electric
Good to see the different examples of not just jet engines (including various military fighter jet engines on test in a hush house facility) but also some boat props.
Thank you for the information
You described turbo JET engines, but the reason why most of the commercial engines are so big is because they are turbo FAN engines
I thought ship propellers were generally made of bronze, not steel. Either way, molten metal does not 'cure' in the mould, it solidifies (phase change, not a chemical reaction).
nice one
Downvoted for never actually answering the question of why jet engines are so large today.
thanks for information
_"Reason Why Aircraft Jet Engines Are Monstrously Large Today"_
It's all about bypass ratio, something you just skipped right over. Look at the GE TF39 and P&W JT9D.
Boat propellers are not usually made of steel.
thought for sure I'd hear more about the turbofan that makes jet engines so big these days
+1
Fantastic, i like the description from whoever she is😊
Thanks I'm amazed at those propelled, the speed they can go.
big dislike. wasted 8:20 minutes of my life and still dont have a answer to the question.
How do you manage to exclude the UK out of jet engine development?
Because the UK don't matter. 😂
This surprises you? They managed to exclude any actual facts about why jet engines are so large. They didn’t know that cast metal doesn’t cure. They got the metal wrong. How would they know about Frank Whittle?
METRIC SYSTEM please like 98% of the world use
I`m American and would like to see us go to metric. In the 80s there was an effort to make the switch. Call us hard headed I guess. I do not care for videos and other media that mix the metric and English systems.
Sub shaft assemblies along the rotational center of the engines with overrunning clutches connecting them and/or gear junctions? (So that parts of the assembly rotate at different speeds but drive one another ?
Propellers are pounded into shape ?
Just as I'd rather NOT go on an ocean cruise liner with 5,000 people aboard, I don't like traveling on a huge aircraft with 800 people aboard either! But there isn't a lot of choice today! I handle that by either taking a "red-eye:" or a very early a.m. flight. I thought the Concorde had a narrow fuselage, but it was a pleasure to fly it, and I really miss the "Queen of the Skies B-747! Those were the good old days!
Interesting - though at 4.39, presentation veers suddenly off course away from aircraft engines to propellers on ships
The reason they need to be so big is because of the ultra high bye pass in the forward part of the engine. Now days the forward fan produces much more thrust then years ago.
When Napoleon was first told that coal based furnaces powering propellers would replace sails sometime in the near future he stated that “Please don’t waste my time with such nonsense”.
Jet engines are so large today because sailing vessels required elaborate rigging and multiple crew members in order to properly rig them. I’m not sure why so many of you are confused. Jeez, just pay attention, it’s free.
At 4.24 it shows the Rarotonga International Airport absolutely 💯 amazing
Forgot to mention that Sir Frank Whittle a British inventor a patent 1930 the engine was fitted to a Gloster E.28/39 the first flight was on May 15 1941 Americans did not invent the jet
Indeed! Omission of a fundamental fact.
I don't think it was ever stated that the jet engine was invented in America...I think you wanted something to complain about...so, you made it up.
R.I.P Big plane it was nice knowing you😰😰🥺😭😭😭😭
3:49 Please explain how the hot air/fuel mixture is accelerated by the turbine. I thought it was the other way round
Picky, picky, picky...this is UA-cam...where facts are whatever you claim them to be...
Top 👍👍
Turbo props are definitely jet engines too..
Propellers are not made of steel! Bronze being the primary metal used with a close second being Stainless Steel, usually for high performance applications. In actual fact it extremely rear for a propeller to be made of steel.
Or rare even.
Was thinking the same thing ... and as for "pounding into shape" those smaller investment cast props ... the script seems to indicate cursory research.
The Airbus A350XWB-900 and Boeing 787 Dreamliner are the currently Very Efficient Aircraft using most Technological Efficient Rolls Royce Trent 1000 and XWB type Engines that Are more Fuel Efficient and quite too.
3 and 4 engine Aircraft are slowly being phasing Out And replaced by the 2 Twin engines types.
the amount of twist on the fan blades, or on the ships screws,
in water, you can see how the water flows best thru the blades, and therefore at which point of twist the thrust is the best, works with air too,
Hey that looks like a good one for pod racer.......rap the fuel tank around it.....an eject chair ......wall all......cheers
The turbine stage doesn't add power from the exhaust, it's the opposite- it takes energy to drive the compressor stages.
Aircraft engines are large because boats have propellers. Got it.
You forgot to mention the bypass ratio
I’m guessing if the fan is bigger then greater efficiency and speed. The big question is what’s the limit. I know the biggest engines so far are in the brand new Boeing 777x. The 737Max has the biggest engines ever placed on a 737 airframe. This caused the airplane to have a tendency to unexpectedly nose up during takeoff as to why Boeing secretly added the MCAS which proved to be fatal in two crashes already.
I saw that bird flying over the Puget Sound several week ago. the nacelles look as big as the fuselage
Impressive how you managed to ignore British advancements in jet propulsion alltogether.
Ships propellers are usually phosphor bronze, not steel.
Propellers are NOT MADE OF STEEL!!!
To thì khoẻ , béo mập thì bền bỉ
Thanks for the video. But, I had no idea what the measurements were in feet and pounds. As most of the world uses the metric system, and you're on a global platform, perhaps you can cater to your worldwide audience?
Aviation works in feet, knots, and pounds mostly according to IATA/ICAO regulations.
So why are jet engines so large these days besides for countering the size and weight of the planes? Is there another reason? There must be….puzzled here too.
The fans provide most of the thrust, not the gases being expelled from the rear of the engine. The larger the fan, the more air can be moved to create more thrust. The turbines in the jet engine are mainly there to turn the fans. So, bigger engines equal bigger fans which equal more thrust to move heavier planes.
Wow
Really big ships can have really big propellers.
Jet engines are huge today because at one time, you had to have at least 3 engines to travel extended over water operations. Four was preferred and thought to be safest. However 2 large engines are CHEAPER to operate than 4 smaller ones. Not necessarily SAFER but CHEAPER. Which is of course the bottom line.
Bigger engines (fans in the front) are entirely for efficiency... same thrust less fuel burn (more profit for airlines).
what's the reason why then?... must have missed that bit
We’ve gone off script here , talking about boat propellers but no explanation of why jet engines are getting larger .
Larger diameter fans produce more thrust for larger, and heavier planes.
The Boeing 928 Jetfoil Hydrofoil boats 🚢 used Jet Engines to propell the boats to high speed of 45 knots.
What the hell was that? I want my money back!!
So why is the 777 still struggling to get the clearance
they are really ducted turbo props
If their jet engines are as reliable as their locomotive engines, I wouldn't want to fly with one.
Turbojets waste lots lof energy by ejecting high temperature air. Turbofans saves lots of energy by ejecting cooler exhaust.
thanks for not using metric system and for not even putting up the pain to subtitle bs measures
Well, let's see: a 747 had 4 engines.........
-while a 777 has but 2. Class dismissed.
As I recall the British gave the USA a jet engine because they were so far behind, same for radar development.
To lift big airplanes!
Question: Does anyone actually need to be told that the engines provide the thrust to power the airplane? If so, how could that someone possibly be smart enough to use a device to watch the video? Just asking.
But it's the Fan that has gotten larger. The Jet engines have not. Big changes in Fans and blades. 😁
Is the core of the CF 6 the same size as the core of the first J-57 in the 707 aircraft? The core of the J-57 was the J-57 plus cover and nacelle. The CF 6 core spins a large fan that blows air around the core and out the back of the engine coverings?
Either the CF-6 or the RB 211 English engines used to be the highest bypass ratios made?
Interesting 🤔 but not that accurate.
The material use in ship propeller is incorrect.
The smaller boat propeller shown being cast used the lost wax process and not made from a wooden pattern. What about the British Meteor jet 1943 the first jet fighter, the British Commet the first commercial airliner 1949, or the British Harrier jump jet 1969 the first vertical take off fighter? 🤔
or a bronze alloy on props
Completely managed to erase Frank whistles input
rip antonov
There is a resemblance between the jet engine and the hot air balloon 🎈. Can you tell me what it is?
hot air?
@@rngalston EXACTLY. SUPER HOT AIR GENERATED BY THE TURBINE this energy makes the Jet Propulsion faster than the regular propeller.
You are full of hot air. 🔥 (•‿•)
"the air is accelerated by the turbine" ???
Could these dimensions be in metric so that the other 99% of the world understands please.
Too bad there isn't some kind of imperial to metric converter on the Internet for people that are too lazy to learn both systems of measurement...oh well...I guess you'll just have to continue complaining and never know...
What m I looking at ?
Can anybody explain 🤣🤣🤣🤣🤣🤣
Why is it that the whole world talks in meters and kilograms, yet America still talks in inches and pounds? Or are your videos only for domestic consumption?
Such a poor video! If you can't fill a mere 8:20 discussing all the reasons why Jet engines are monstrous today explaining the concepts of bypass ratio, correspondingly high OPR and turbine entry temp etc, then don't make the video. Get your views in another area that you know something about.
للأسف غير مترجم
The way the lady said ‘seven seventy-seven’ instantly tells me she has very little to no aviation background. I’m sorry but hearing that made me cringe.
Would really like to see the Like/Dislike ratio in this video.
Garbage video. The reason for large jet engines was never given. The video was all over the place, talking about boat propellers....
Before watching video i was screaming inside don't go on ship this time. please 🤦🏻♂️😒
F** did I missed the answer!?
hahahaha aviation can build all these bigass engines, but they still cant build the perfect black box.
waddafuck!
The narrative of your video are incoherent on the subject of your video.
If we are going to direct to the point, the present large size of jet engine, in particular jumbo jet (two engines) evolve from the requirements of ETOPS .
The 225 is dead.
There were several spoken technical inaccuracies in this video but the 225 is never mentioned OR SEEN AT ALL in the footage. The Antonov shown several times has 4 engines and a single tail, making it the AN-124.
The AN-225 had 6 engines and a twin tail.
Did you really need to spend so much time on ship propellers in a video about jet engines?
Good grief, I thought I had seen it all, ouch. Please get your facts straight before airing.
What a waste of time and energy, mine also.
Is it because they have to lift heavy shit?
Just go back to 3 or engines or even 6, it would be safer to have 4 engines then 2., 🤔
Chỉ đơn giản là vì lòng tham lam của loài người
A rare dislike from me, need to stay on topic. This did not. ((
Brains an money thay do alot 2 gether will gof ar on earth an space
a few technical inaccuracies i'm too lazy to get into in this vid.
Thank you for sharing...