I`m 46yrs old and planning on going back to school for aircraft maintenance. I hope I learn this. It`s a career change for me, I love planes and finally doing something about it.
I'm in aircraft maintenance myself. I do have a A&P. starting is fun but doing leak checks when it at 70% N1 is way better powerplants have a soothing hum when your next to them. good luck with your new adventure
David Henderson What city do u live? I`m in Chicago. Do u work for one of the big airline companies? I know i`m gonna have to start with a low paying aviation job after graduation and then move up. I wanna work in line maintenance for a big airliner oneday. I hope I learn this. I`m little nervous and I`m also a negative person. Im working on always being positive.
I work in Lincoln NE. I mainly work on citations 560 - 10s. look into duncan aviation. what ever you do do not go to redstone college there's cheaper places to go get your A&P.
David Henderson Do you work night shift? I`m looking into Lewis University Romeoville IL I wanna take the certificate program instead of the Associates. I`m 46 now byy the time i graduate i`ll be about 48 going on 49. You think i`d still get hired at that age and being a rookie?
I've talked to countless pilots and aeronautical engineers about how a turbine engine works. This is the first video that put it all together in an understandable format. Thanks!
For the Eclipse jet, I designed a circuit that takes and analog of the engine speed in, and outputs an analog of starter torque. This was to match the profile that Pratt Whitney in Canada engine manufacturer specified. The new engine still flooded sometimes. I was working for General Dynamics that supplied the starter/generator.
Fascinating! I always wondered how they start a jet engine. My big learning point was that it's the bypass air that mostly provides the thrust. I always thought it was the hot exhaust air that did it.
Modern engines rely on automation to sequence the start events precisely. We don't see it on the video but a lot more happens in the background such as boost pumps in the wing tanks automatically start feeding fuel to the engine and automatically stop once motive flow is established and ignitors momentarily glowing hot in the combustion chambre until the flame is self-sustaining and then shutting down. If it wasn't for automation the pilots wouldn't be so relaxed during the start up. You may catch a glimpse of the workflow on videos showing a PT6 Turbine starting.
Joe Brown that's interesting. I wonder why the manufacturer would rely on mechanical boost pumps rather than passive jet pumps. I would think pumps would increase maintenance costs a lot. The boost pumps being located in the wing tanks must be expensive to replace periodically because they are critical to the operation of the engine on this model. Strange. Do you know when they are energised and when they shut down?
Yes. The fuel pumps in the 145 are turned on when the airplane is turned on. They are only turned off during fuel cross feed, or when you turn the airplane off. They are very reliable pumps. I probably have close to 10,000 hours in the 145 and can count on one hand the number of times I've seen a fuel pump fail. Fuel pump MELs are fairly rare too. I think I've only seen one in the last 5 years. Maintenance costs can't be that high.
I noticed that stevo1kinevo does not relax when he starts his turboprop, he occasionally mentions he doesn't want a "hot start" can i impose upon you to explain a "hot start and why that is dreaded so much? Great explanations here. I'm glad I clicked on this suggested video.
Basically a hot start is when the ITT (temperature inside the engine) becomes to high/hot and can damage the engine. It can be from a number of things, but if a hot start happens and the fuel is not taken away it can cause parts of the engine to fail or break. Your buddy doesn't want a hot start because it could potentially mean having to rebuild or buy a new engine.
Retired military pilot here. Great video, let me (admittedly) over simplify with the 5 S's: Suck (the air in) Squeeze (the air) Spit (some fuel into the air) Spark (add some to the mixture) Spew (it all out as thrust)
Thanks for the video! Used to be in M1A1 Abrams and loved how magic happens and how resilient the turbine engine was (they are turbine and not piston tank engines). Unlike aircraft, they have a simple button for starting and gauges that are designed to let you know when there is trouble and unless master warning or caution comes on, no need to take your eyes off the battlefield. Abrams (I would say tanks, but it is the only one) and helicopter electric starter motors are big, but nothing like starting a thrust driven plane. Still cool how a vintage '80s turbine control system can control a ~70 ton turbine driven tank reliably.
Just Google "Y2K" videos, it's perfectly works for motorcycle. But please leave Hondas alone, they already put a turban in the cars, leaving aside a perfect powerful atmo engines history :(
Congrats! You are the only person giving an explain of first movement of jet engine in whole youtube, I was killing for curiosity of that for several days. Thank u!
I was a "crew chief" when I was in the Air Force. I was engine-run-qualified on both the C-141A, and B-52D, at different times. It was a thrill every time. I loved it!
This video is one of the best on UA-cam when it comes to aviation education. And, to top it off, the comment threads below are some of the best as well! Great job! You inspire greatness!
This video was especially fascinating to me as I'm sure I was on a flight last week whose APU had failed so they had to start using the bleed air system, as outlined in this video. I suspected at the time, so searched just now and found this video. Basically, we were about an hour delayed for pushback, pilot said they had a number of system failures. I was sat right at the back (777, in the row with just two seats next to the window instead of three - best seat in economy after bulkhead seat - extra leg room), and during that hour delay, I kept periodically heard the sound of a turbine spinning up for a few seconds and then winding down. I figured this was the APU and that they were having issues with it (I knew as much as the APU isn't really needed during flight, so wasn't too fussed), after a while, I heard a few thuds and clicks from underneath the plane, shortly afterwards one engine fires up and then we push back. We sat on the tarmac for a while, before I once again heard the sound of a turbine spinning up and then shutting down. The engine that was lit then spun up quite high for about 45 seconds and then returned to idle, at which point I realised the second engine had started. At the time I didn't realise a bleed air start needed the other engine to be at highish thrust. Tl;dr - I was on a plane last week I'm pretty sure had to do a bleed air start.
Yes. The engines start using compressed air, supplied by the APU. If the APU is broken, you have to start the engine using an external air cart. It is much more of a hassle starting an aircraft using an air cart versus an APU though there are some types of jet aircraft that can only be started using an air cart.
It's actually not safe, and this has caused crashes in the past but it's still permissable to fly with a broken APU otherwise it could cost the airline MONEY.
It is safe. The APU is shutdown in the air, unless an engine driven generator is MEL'd necessitating the APU generator's use. If both an engine driven generator and the APU generator is MEL'd the aircraft would be grounded. There has never been a crash caused by an inoperative APU. It's function is primarily air for air-conditioning, and engine starting, and electricity on the ground until the engines can be started. Then you can use the electricity from the engine driven generators and bleed air from the engines to operate the air-conditioning.
In under 2 mins this guy has taught me Rocket science, good job and this video deserves praise, i know honestly understand the basics of a thruster engine in under 2 minutes
Many other UA-cam presenters should watch this to learn how to give clear and precise information. There are too many UA-camrs who can’t talk their way out of a paper bag.
I fly. Mono-prop only, but am an avid X-Plane enthusiast and I'm always looking for stuff. This is the best thing I've seen since sliced bread. Well done man! I've saved it in my favorites and will definitely be watching it, or anything else you do again. Blue side up!
I really like how you make the distinction between 4/2-stroke "bang" and jet "burn". Important to realize that this thing is like a RAGING fire that is fed through a venturi, not a series of delayed impulse.
@Zachary Sylvester Yeah, my 1st question is always how does that work not why does that work. The why for me comes after. I didn't know how Jet engines started, I knew how they worked its similar to a perpetual motion machine but how they started I was curious about
Great video - just a nitpick from someone in the industry though, your definition of "hot section" and "cold section" is a bit off. The cold section is comprised of both the fan and all of the compressor stages, everything upstream of the combustor. The hot section is the combustor along with the downstream turbine stages, nozzle, etc. Your diagram labels the entire core engine as the "hot section".
Not completely accurate. I design ground based gas turbines for power plants. Fuel will burn in the combustor at atmospheric pressure. It doesn’t need pressure to burn. That isn’t the reason you need to supply compressed air to the GT to start it. The reason a GT needs compressed air is to pre-spin the rotor. This is done because the GT generates power from the principal that more work is extracted expanding hot gas than compressing cold gas. If the GT isn’t pre-spun the combustor will be at atmospheric pressure and the hot gases from the combustor will not generate any power in the turbine since there is no pressure difference for those gases to expand with. Thus the turbine will not drive the compressor. If only a small amount of pressure is generated in the compressor then the turbine will generate some power but at low pressure ratios this is not enough to overcome the friction losses in the turbine and the GT will deccelerate. So the GT needs to be spun up to a critical speed over which it is able to generate more power in the turbine than the compressor and friction losses consume and then the GT is able to accelerate on its own from there.
Yes but GT at the power station has huge turbine since you need kinetic energy. But with jet turbine it's so small since you need the energy to drive the compressor remaining is required for building thrust.
Well explained Geoff. Your description reminded me that Also Jet engines are more efficient at higher colder altitudes because of the temp difference between intake and exhaust air ratios.
Thank you. You have just filled in the missing piece of my understanding of why the generated combustion pressure doesn't push out of the intake and stop the process.
Its the only video on youtube that described in details that how gas turbine engines really start from a very step to its last Excellent work you done Thumsup 😎
Combined gas laws, increase the pressure of a gas while keeping volume constant, the temperature will increase. By stage 14 (I think they said) pressure is high with volume being constant, therefore by the time the air reaches the diffuser to the combustion chambers, the temperature will have increased significantly.
I built over a thousand hot sections as well as complete engine assemblies at Curtiss -Wright on Pratt & Whitney j-57 and other manufacturers' engines and the hot section is built as a seperate assembly and I can assure you it starts with the HPC turbine and is capped off with the high speed turbine, after the diffuser, fuel manifoild, combustion chambers / cans. You lift that up and marry it to the cold section / low pressure turbine, and tie it all together with the ass end low speed turbine long shaft that threads into the cold section frone end turbine. In the factory that high speed turbine is built by one guy and is brought to the hot section assembly area in a dolly. The hot section IS that part that is all tied together by the high speed short shaft turbine. Look at the drawings. It's a whole seperate assembly.
Amazing video I have researched a lot but couldn't find the explanation from where the original starting air comes from this video explains it very well
Best video finally understood how everything works in planes now I've learned car engine , bike engine , plane engine 😀 Suggest any other engine's please 😁😁
Ok video- some of the terminology was off: The "Hot Section" usually refers to the combustion/turbine sections, and not the compressors. Bypass air isn't used for bleed air applications, since it has very little pressure and close to ambient temperature. "Bleed air", or customer bleed is the term for air pulled off the compressor section to supply low pressure or high pressure, warm air for airstart, cabin pressurization, airfoil or inlet anti-ice, etc.
@@seriouscat2231 anything beyond cliches and stereotypes? Some basic semblance of cultural literacy? That sort of thing? Honestly I don't remember. It's been 2 years you idiot lol
Great video. I worked the ramp for Skywest quite a few years ago so it's cool to see how things worked for the ERJ. We handled mostly CRJ-200 and 700's with some brasilias and Dash-8's for fun. I remember starting up the CRJ's with our enormous huffers. I'm not completely positive but I think we started both engines using the huffer before push. Always fun playing around with the big toys.
Yeah but for the normal person it would be the hot section. But I was really cool seeing them talk about the engine bleed air, I'm taking a final over that tomorrow lol
For a "normal person"...WTF? This is supposed to be an instructional video for "normal" people...so what, it's acceptable to feed them incorrect information? Cold section includes the inlet air duct, the compressor and the diffuser. Hot section includes the combustion chamber, the turbine and the exhaust.
@@edinfific2576 no, glass, as in glass cockpit. That's the modern computerized system that puts all of the information into a digital screen interface, rather than having physical gauges all over the place.
Gas turbine engines use the Brayton Cycle also known as the constant-pressure cycle. Energy added to the air flowing through the engine by the burning fuel causes the volume of air to increase, but the pressure remains relatively constant. Nice video!
Echo a couple of points made here, great viewing while on lockdown! but also bravo to the narrator who was clear, concise and brought it down to a level for beginners to understand. An interesting video well made.
This is a great video for home schooling. My daughter recently asked how a plane starts after flying across the country. Your video provided a great explanation. Thanks.
Half a gallon per minute is still a lot of fuel. Keep in mind a car can run for 10+ hours on one 16 gal tank. This (small) turbofan is chewing through 16 gal in 8 minutes.
I started Military Jets many times as a jet engine mechanic. The most fun you can have is doing an ops check on a newly installed engine. Trouble shooting is fun as well and can be a challenge. Suck, Squeeze, Bang and Blow gets giggles from the ladies. We used MA1A start carts to feed air to the engines for engine starts. The #2 engines were started first to allow the generator to supply power to the gauges since the #1 engine would not have electrical power to the gauges until after the #2 was running. The switch over of air was also performed on the #1 engine during start with the air cart. Our #2 engines didn't bleed air to the #1...it is just the way they were by design.
Getting just a few glances of the aircraft's surrounding, that looks like it might have been recorded in CLE. I worked for CO/UA for 26 years in CLE, and was a gate agent for many an ERJ145, and I can even remember the ERJ135's. Is that CLE?
I`m 46yrs old and planning on going back to school for aircraft maintenance. I hope I learn this. It`s a career change for me, I love planes and finally doing something about it.
I'm in aircraft maintenance myself. I do have a A&P. starting is fun but doing leak checks when it at 70% N1 is way better powerplants have a soothing hum when your next to them. good luck with your new adventure
David Henderson What city do u live? I`m in Chicago. Do u work for one of the big airline companies? I know i`m gonna have to start with a low paying aviation job after graduation and then move up. I wanna work in line maintenance for a big airliner oneday. I hope I learn this. I`m little nervous and I`m also a negative person. Im working on always being positive.
I work in Lincoln NE. I mainly work on citations 560 - 10s. look into duncan aviation. what ever you do do not go to redstone college there's cheaper places to go get your A&P.
David Henderson Do you work night shift? I`m looking into Lewis University Romeoville IL I wanna take the certificate program instead of the Associates. I`m 46 now byy the time i graduate i`ll be about 48 going on 49. You think i`d still get hired at that age and being a rookie?
Hey I looked into Ducan and the positions require experience. How does a rookie gain experience if all the companies require it?
Excellent, high quality and professional video. Very informative. Thanks!
Thanks!
And there's more on the way...
Ditto!! Thank you.
stereopolice I
BrewtownFlyer
I've talked to countless pilots and aeronautical engineers about how a turbine engine works. This is the first video that put it all together in an understandable format. Thanks!
For the Eclipse jet, I designed a circuit that takes and analog of the engine speed in, and outputs an analog of starter torque.
This was to match the profile that Pratt Whitney in Canada engine manufacturer specified. The new engine still flooded sometimes. I was working for General Dynamics that supplied the starter/generator.
No stupid music, just clear concise information - well done.
Hello ExpressJet ERJ Pilots! I'm an ExpressJet ERJ mechanic! Glad to keep you guys in the air!
We can also say....thanks to broke always something....keeps or job safe :) :)
TheMusicboy316 Thanks! XJT MX is top notch! I love you guys!
Hey, I'm an MRO mechanic on these engines. Thanks for taking great care of them in the field!
Fascinating! I always wondered how they start a jet engine. My big learning point was that it's the bypass air that mostly provides the thrust. I always thought it was the hot exhaust air that did it.
do pilots pronunce turbines as turbans as well?
Jon T only the indian pilots..
Most people in the aviation industry say it that way
Most people in USA call it turban, everyone else to my knowledge say turbine which sounds better.
***** all the time.
Everyone else say's turbine which is correct - a turban is something an indian wears on his head
I've been searching all morning for a clear and concise explanation of a jet engine. This is it. Thank you
So I'm at work and "Suck Squeeze Burn Blow" comes up as a coworker walks past my desk.
Guess it's time to update my resume.
She farted as she walked by you am guessing
Modern engines rely on automation to sequence the start events precisely. We don't see it on the video but a lot more happens in the background such as boost pumps in the wing tanks automatically start feeding fuel to the engine and automatically stop once motive flow is established and ignitors momentarily glowing hot in the combustion chambre until the flame is self-sustaining and then shutting down. If it wasn't for automation the pilots wouldn't be so relaxed during the start up. You may catch a glimpse of the workflow on videos showing a PT6 Turbine starting.
ruirodtube that may be true with other aircraft, but this particular airplane does not rely on motive flow and the fuel pumps never shut off.
Joe Brown that's interesting. I wonder why the manufacturer would rely on mechanical boost pumps rather than passive jet pumps. I would think pumps would increase maintenance costs a lot. The boost pumps being located in the wing tanks must be expensive to replace periodically because they are critical to the operation of the engine on this model. Strange.
Do you know when they are energised and when they shut down?
Yes. The fuel pumps in the 145 are turned on when the airplane is turned on. They are only turned off during fuel cross feed, or when you turn the airplane off. They are very reliable pumps. I probably have close to 10,000 hours in the 145 and can count on one hand the number of times I've seen a fuel pump fail. Fuel pump MELs are fairly rare too. I think I've only seen one in the last 5 years. Maintenance costs can't be that high.
I noticed that stevo1kinevo does not relax when he starts his turboprop, he occasionally mentions he doesn't want a "hot start" can i impose upon you to explain a "hot start and why that is dreaded so much? Great explanations here. I'm glad I clicked on this suggested video.
Basically a hot start is when the ITT (temperature inside the engine) becomes to high/hot and can damage the engine. It can be from a number of things, but if a hot start happens and the fuel is not taken away it can cause parts of the engine to fail or break. Your buddy doesn't want a hot start because it could potentially mean having to rebuild or buy a new engine.
agreed, really well done, explained nicely without talking down to us, cool to understand now, thank you
Retired military pilot here. Great video, let me (admittedly) over simplify with the 5 S's:
Suck (the air in)
Squeeze
(the air)
Spit
(some fuel into the air)
Spark
(add some to the mixture)
Spew
(it all out as thrust)
Why did he call the GPU an APU?
@@nickcallisdead Where? 4:20 is correct, idk what you're talking about
Suck squeeze bang blow that's what makes the big jets go!!!
Trust anything military to be a simple regimen!
@@ronjohnson9507 that's good, my red head left me for the nav lights 😂
Very interesting video! But why is it normal to start engine Nr.2 before engine Nr.1? Is there a reason for that?
Great video!
These RJ pilots have been working on their “cool dude” voices for awhile...
He hardly blinked
They certainly do "talk the talk!"
^..^~~
Roger that! :-)
working on their whiskey intoxication more likely
I don't get "the voice," as someone who works in aviation that's not a pilot, I think it sounds ridiculous. Lol.
Thanks for the video! Used to be in M1A1 Abrams and loved how magic happens and how resilient the turbine engine was (they are turbine and not piston tank engines). Unlike aircraft, they have a simple button for starting and gauges that are designed to let you know when there is trouble and unless master warning or caution comes on, no need to take your eyes off the battlefield. Abrams (I would say tanks, but it is the only one) and helicopter electric starter motors are big, but nothing like starting a thrust driven plane. Still cool how a vintage '80s turbine control system can control a ~70 ton turbine driven tank reliably.
will this fit on my honda?
NeATaNDtURdy Why? It can't even keep up with that VTEC though…
"Honda." Do you have any idea how UNspecific that is? FYI: old chopper turbines have been built into a motorcycle.
Your Honda would need Wings instead of wheels !!
Yes remember to get the K24 harness for a direct plug and play transplant
Just Google "Y2K" videos, it's perfectly works for motorcycle. But please leave Hondas alone, they already put a turban in the cars, leaving aside a perfect powerful atmo engines history :(
Another day of where quarantine got me ....
Yup- we have stationary turbine compressors at our plant and I always giggle when I get to fire them up.
When it is all over imagine all the stuff you will know and the erudite conversations you will have with the other survivors!
@@grevberg Now that you put it like that ... shall watch more
A few more random videos, some porn, sleep, wake up tomorrow, and repeat....
Now that's power.
Congrats! You are the only person giving an explain of first movement of jet engine in whole youtube, I was killing for curiosity of that for several days. Thank u!
I was a "crew chief" when I was in the Air Force. I was engine-run-qualified on both the C-141A, and B-52D, at different times. It was a thrill every time. I loved it!
Good stuff. I was a crew chief on 16's. I was stationed at JBA. Fighters are a little different but I would have loved to have been on heavys.
you've got a perfect narrator's voice, so soothing.
This guys is staring into my soul
ris he never blinked
CatBob ya because Gingers have no souls so he has to suck your soul out so he can have it
Think it's easy staring into your soul? NOT so!
it's called a teleprompter ya morons
Yeah, we're joking around. Chill out. We can see his eyes moving while he reads.
This video is one of the best on UA-cam when it comes to aviation education. And, to top it off, the comment threads below are some of the best as well! Great job! You inspire greatness!
No matter how much of this I already know, I always find myself watching these videos. This was most definitely an enjoyable video to watch.
This is a very good video, with useful illustrations. Thanks for an interesting piece!
This video was especially fascinating to me as I'm sure I was on a flight last week whose APU had failed so they had to start using the bleed air system, as outlined in this video. I suspected at the time, so searched just now and found this video. Basically, we were about an hour delayed for pushback, pilot said they had a number of system failures. I was sat right at the back (777, in the row with just two seats next to the window instead of three - best seat in economy after bulkhead seat - extra leg room), and during that hour delay, I kept periodically heard the sound of a turbine spinning up for a few seconds and then winding down. I figured this was the APU and that they were having issues with it (I knew as much as the APU isn't really needed during flight, so wasn't too fussed), after a while, I heard a few thuds and clicks from underneath the plane, shortly afterwards one engine fires up and then we push back. We sat on the tarmac for a while, before I once again heard the sound of a turbine spinning up and then shutting down. The engine that was lit then spun up quite high for about 45 seconds and then returned to idle, at which point I realised the second engine had started.
At the time I didn't realise a bleed air start needed the other engine to be at highish thrust.
Tl;dr - I was on a plane last week I'm pretty sure had to do a bleed air start.
How is it safe to fly with a broken APU (4:50)? Or is it just easier to start with a start cart?
augustine22 safe? yes. easier to start with a cart? No. APU assist start is a lot easier.
Yes. The engines start using compressed air, supplied by the APU. If the APU is broken, you have to start the engine using an external air cart. It is much more of a hassle starting an aircraft using an air cart versus an APU though there are some types of jet aircraft that can only be started using an air cart.
It's actually not safe, and this has caused crashes in the past but it's still permissable to fly with a broken APU otherwise it could cost the airline MONEY.
It is safe. The APU is shutdown in the air, unless an engine driven generator is MEL'd necessitating the APU generator's use. If both an engine driven generator and the APU generator is MEL'd the aircraft would be grounded. There has never been a crash caused by an inoperative APU. It's function is primarily air for air-conditioning, and engine starting, and electricity on the ground until the engines can be started. Then you can use the electricity from the engine driven generators and bleed air from the engines to operate the air-conditioning.
John Smith
Awesome video - no plain BS with dumb talks, just pure facts and informations.
I finally learned what N2 is :3
In under 2 mins this guy has taught me Rocket science, good job and this video deserves praise, i know honestly understand the basics of a thruster engine in under 2 minutes
@0:50 "They run off a suck squeeze burn blow principal." Sounds just like my ex. 🤣
Many other UA-cam presenters should watch this to learn how to give clear and precise information. There are too many UA-camrs who can’t talk their way out of a paper bag.
say whut?
Hi DF
Yes, you are right there.
No BS. no annoying music and crystal clear content makes for a good watch.
Greetings from the UK
John.
Take care DF.
0:51 - 0:55 like my Ex Girl Friend.
Tillamook burn ?
Heimdall all seeing yes, because she “burned me” as in cheated.
she's still your gf after she cheated on you???
Man, are you kidding? The guy said *EX* girlfriend.
LOL!!!!!
I fly. Mono-prop only, but am an avid X-Plane enthusiast and I'm always looking for stuff. This is the best thing I've seen since sliced bread. Well done man! I've saved it in my favorites and will definitely be watching it, or anything else you do again. Blue side up!
As a commutair mechanic this is such a familiar sight now that we're receiving so many expressjet ERJs lol
This was very informative and easy to follow. Thanks for posting.
I thought you needed a frozen chicken to start a jet engine, thats what I see Rolls Royce do.
I thought they did that to make diced chicken for casseroles!
Haha, the good old birdstrike test!
@@thecaynuck4694 grandma was ready to say goodbye , the universe was just speeding along we could only wave .
ion gerrit
I think that's how they turn it off
Great video, When is the next video, looking forward to watching it
I really like how you make the distinction between 4/2-stroke "bang" and jet "burn". Important to realize that this thing is like a RAGING fire that is fed through a venturi, not a series of delayed impulse.
This is a great video to understand how these start and and what is the bleed buttons are for. Thanks man, greetings for Mexico.
professional informative video. thank you kind sir!
Cool. As a student of Engineering this was a super informative video
I think it's more 'I like engineering' then actual studying of it.
I was interested in the how, that was answered for me I can figure out the why from there
O.o LOL I'm an Engineering student too and personally prefer to understand the system before I have to derive any mathematical equations.
@O.o LOL Indeed it is
@Zachary Sylvester Yeah, my 1st question is always how does that work not why does that work. The why for me comes after. I didn't know how Jet engines started, I knew how they worked its similar to a perpetual motion machine but how they started I was curious about
Wish I could get this excited starting something like my car.
Very well put together! I finally have a better grasp of how these work, thank you!
Thank you. I think you're the only place on the internet to explain how they initially start spinning.
6:17 omg he blinked xD
that was the second to draw.
OMG
@@dmmusicmusic OOMMGG
Great video - just a nitpick from someone in the industry though, your definition of "hot section" and "cold section" is a bit off. The cold section is comprised of both the fan and all of the compressor stages, everything upstream of the combustor. The hot section is the combustor along with the downstream turbine stages, nozzle, etc. Your diagram labels the entire core engine as the "hot section".
Not completely accurate. I design ground based gas turbines for power plants. Fuel will burn in the combustor at atmospheric pressure. It doesn’t need pressure to burn. That isn’t the reason you need to supply compressed air to the GT to start it. The reason a GT needs compressed air is to pre-spin the rotor. This is done because the GT generates power from the principal that more work is extracted expanding hot gas than compressing cold gas. If the GT isn’t pre-spun the combustor will be at atmospheric pressure and the hot gases from the combustor will not generate any power in the turbine since there is no pressure difference for those gases to expand with. Thus the turbine will not drive the compressor. If only a small amount of pressure is generated in the compressor then the turbine will generate some power but at low pressure ratios this is not enough to overcome the friction losses in the turbine and the GT will deccelerate. So the GT needs to be spun up to a critical speed over which it is able to generate more power in the turbine than the compressor and friction losses consume and then the GT is able to accelerate on its own from there.
Geoffrey Engelbrecht very well explained thank you
Yes but GT at the power station has huge turbine since you need kinetic energy. But with jet turbine it's so small since you need the energy to drive the compressor remaining is required for building thrust.
Geoffrey Engelbrecht are you a pilot
Well explained Geoff. Your description reminded me that Also Jet engines are more efficient at higher colder altitudes because of the temp difference between intake and exhaust air ratios.
Thank you. You have just filled in the missing piece of my understanding of why the generated combustion pressure doesn't push out of the intake and stop the process.
Very good video, congratulations!
Its the only video on youtube that described in details that how gas turbine engines really start from a very step to its last
Excellent work you done
Thumsup 😎
1:07 n- Factually incorrect - the "hot section" starts at the combution cans, not the HPC blades.
Combined gas laws, increase the pressure of a gas while keeping volume constant, the temperature will increase. By stage 14 (I think they said) pressure is high with volume being constant, therefore by the time the air reaches the diffuser to the combustion chambers, the temperature will have increased significantly.
@@dashamanstevo5326 The hot section starts at the combustion chamber.
I built over a thousand hot sections as well as complete engine assemblies at Curtiss -Wright on Pratt & Whitney j-57 and other manufacturers' engines and the hot section is built as a seperate assembly and I can assure you it starts with the HPC turbine and is capped off with the high speed turbine, after the diffuser, fuel manifoild, combustion chambers / cans. You lift that up and marry it to the cold section / low pressure turbine, and tie it all together with the ass end low speed turbine long shaft that threads into the cold section frone end turbine.
In the factory that high speed turbine is built by one guy and is brought to the hot section assembly area in a dolly. The hot section IS that part that is all tied together by the high speed short shaft turbine.
Look at the drawings. It's a whole seperate assembly.
@Carl Ferrigno Where is “here”?
As an indian sikh....this video made my turban spin 😂
sikh joke brother
Your last name is beautiful.
@@Mandy7D7 Ehhh !
I always think this when I hear Yanks pronounce "turbine" as turban. 😂😂😂
That b racist
that was amazingly interesting, very good job thank you
Amazing video I have researched a lot but couldn't find the explanation from where the original starting air comes from this video explains it very well
Best video finally understood how everything works in planes now I've learned car engine , bike engine , plane engine 😀
Suggest any other engine's please 😁😁
Love and respect from Milan, Italy 🇮🇹❤️
Dott. Fuoriclasse Love and respect from Leicester, United Kingdom 🇬🇧♥️
Ok video- some of the terminology was off: The "Hot Section" usually refers to the combustion/turbine sections, and not the compressors. Bypass air isn't used for bleed air applications, since it has very little pressure and close to ambient temperature. "Bleed air", or customer bleed is the term for air pulled off the compressor section to supply low pressure or high pressure, warm air for airstart, cabin pressurization, airfoil or inlet anti-ice, etc.
Right Sir!
Correct
turbans lol
Americans XD
Rakesh Allen
ಠ_ಠ rly tho
Keith Doran You are so ignorant lol.
@@RealityIsTheNow, what is it that he does not know?
@@seriouscat2231 anything beyond cliches and stereotypes? Some basic semblance of cultural literacy? That sort of thing? Honestly I don't remember. It's been 2 years you idiot lol
Extremely interesting, concise, and well done video.
Great video. I worked the ramp for Skywest quite a few years ago so it's cool to see how things worked for the ERJ. We handled mostly CRJ-200 and 700's with some brasilias and Dash-8's for fun. I remember starting up the CRJ's with our enormous huffers. I'm not completely positive but I think we started both engines using the huffer before push. Always fun playing around with the big toys.
awesome video, very high quality explanation and neat animation. thank you for all the work and effort you put in!
Great video! :)
The "hot section" isn't at the front of the engine ~ Signed, 25 year A&P
Yeah but for the normal person it would be the hot section. But I was really cool seeing them talk about the engine bleed air, I'm taking a final over that tomorrow lol
I didn't think he said it was.
For a "normal person"...WTF? This is supposed to be an instructional video for "normal" people...so what, it's acceptable to feed them incorrect information?
Cold section includes the inlet air duct, the compressor and the diffuser.
Hot section includes the combustion chamber, the turbine and the exhaust.
as an aircraft maintenance student, I agree with you Patrick.
Correct, everything aft of the fuel nozzles is the hot section.
Better put together and more informative than the BBC, thanks for your work! 👌
Excellent video, keep up the great work!
I get it but the question I have is “Dude, do you ever blink??” I think you’d win any stare down contest!
Ellexis he’s not human. He is a robot built by the Mormons to trick young pilots into working at expressjet for shitty pay!
Nice video. I was expecting a pos clickbait sesame street video and was surprised at how technical it was. Subbing you. :D
Too much glass. I was old school. CH53D Sea Stallion, USMC. Lots of gauges, leaking hydraulics, noise and the occasional “Oh Crap!”
yeah yeah sure thing
😅
Did you mean to say "Too much CLASS"?
rotorheadv8 and all that free gamma rays from the radium in the dials.
@@edinfific2576 no, glass, as in glass cockpit. That's the modern computerized system that puts all of the information into a digital screen interface, rather than having physical gauges all over the place.
@@amaze2n woooosh
Gas turbine engines use the Brayton Cycle also known as the constant-pressure cycle. Energy added to the air flowing through the engine by the burning fuel causes the volume of air to increase, but the pressure remains relatively constant. Nice video!
Aaron Racing shut up
Echo a couple of points made here, great viewing while on lockdown! but also bravo to the narrator who was clear, concise and brought it down to a level for beginners to understand. An interesting video well made.
0:53
*WRONG!* It goes "Air, Money, Noise"
reminds me of when Anakin has to restart one of his turbine engines in Episode 1 during the race
Designandrew Based on the same logic so you're not far off there.
If you had been one of my teachers, I'd have gone a lot further in school.
This is a great video for home schooling. My daughter recently asked how a plane starts after flying across the country. Your video provided a great explanation. Thanks.
5:22 The thrust levers say 'Go around'. Does that mean you can't touch them?
Looks like IAH!?
"I will never blink!!!!"
3:29 Half a gallon each minute? Really. It got to be half a gallon each second
Half a gallon per minute is still a lot of fuel. Keep in mind a car can run for 10+ hours on one 16 gal tank. This (small) turbofan is chewing through 16 gal in 8 minutes.
Wouldn’t it be 8 gal in 8 mins ?
With two turbofans
lol, it would be, I royally fucked up my maths,
@@derpderpyface5246 8 gallons in 16 min guys. one gallon every 2 minutes, and I work on these. They burn way more kerosene than that
I started Military Jets many times as a jet engine mechanic. The most fun you can have is doing an ops check on a newly installed engine. Trouble shooting is fun as well and can be a challenge. Suck, Squeeze, Bang and Blow gets giggles from the ladies. We used MA1A start carts to feed air to the engines for engine starts. The #2 engines were started first to allow the generator to supply power to the gauges since the #1 engine would not have electrical power to the gauges until after the #2 was running. The switch over of air was also performed on the #1 engine during start with the air cart. Our #2 engines didn't bleed air to the #1...it is just the way they were by design.
This s the perfect video one should see to know the exact principle of starting Jet Engine. Thanks Man
-How to start a yawning captain?
-Bleed some strong coffee.
Me: F8 not working for safe mode booting on lenovo
UA-cam: learn about how jet engine starts
Life Walker lol, no jokes?
😂😂😂
The way I start my jet's engine is much easier. I just launch Steam, and select Microsoft Flight Simulator 2020. Done!
I love watching videos like this in public. Sparks a lot of good conversation!
Your content is super high quality and easy to understand, thank you for providing it to us.
1st chapter in the pilot handbook: "Uhhhhhhhhhhhhh."
Chapter 1.1: Ladiesandgentlemen...thisisyourCAPTAINspeaking...im John Smith andmycopilottoday is Mal Jones. Wereinforasmoothflighttoday
turbans or turbines?
turbines
Tom Cameron depends on if it's been stolen by Muslims or not
Turbfans yes very
Turbitches. You idiot
Tom Cameron Almonds or Ahmonds... Hahaha
uuuuuuuuuuuuuu were going for 2% engine start on #1 uuuuuuuuuuuuuuuuuuuu 2% on #2 uuuuuuuuuuuu. HA HA HA! Why do they always do that? lol
The most clearest explanation of turbine engines I have seen so far. Great work.
Getting just a few glances of the aircraft's surrounding, that looks like it might have been recorded in CLE. I worked for CO/UA for 26 years in CLE, and was a gate agent for many an ERJ145, and I can even remember the ERJ135's. Is that CLE?
Jesus, blink once in a while man, we need to know you're human
He did at 6:17. Great! I was looking for that.
"turbans"
Gah! What's the next vid?!
They covered the cross bleed start in exquisite detail. Excellent and thorough video.
This was very cool and very self-explanatory and very understanding LOL even for me. Awesome
“This happens more often that you might think”
WHAAAAAATTT?!
Excellent explanation. I pretty much understood what takes place after start but I always wondered how it got to that stage. Thanks
Thanks for the great video, answered many questions sitting on a ramp wondering...
Very nice teaching/refresher video! Thank you.
thanks for excellent explanation of common situation. Just wondering why this is done manually, it could be automated easily?