The APU is started by an electric motor or an external power source. This can either supply compressed air to the pneumatics manifold start the engines or by providing power to turn the electrical generators. On the 737 air start is used to turn the N2 compressor, packs are kept off while APU is running to achieve over 30PSI on the duct pressure, this explains why AC is observed to briefly turn off before start up.
Not a second stage of the fan.... You actually see two things: - next to the fan cone, are the IGV's (Inlet Guide Vanes) of the compressor, - between the IGV's and the engine's cowling, are the fan's OGVs (Outlet guide Vanes), whose purpose is to stop the "spinning trend" of the airflow moved by the fan. They are shaped like a little wing.
Those are General Electric CF6s. You can tell by the rounded looking engine pods with the split exhaust duct (seperate exhaust for the fan and core). The Rolls Royce uses a blended exhaust.
@puffaliciouschester the CF6 is a twin spool turbofan. the low pressure compressor comprises of the fan and the booster stage on a single shaft driven by a 4 stage low pressure turbine. The high pressure compressor is driven by the 2 stage high pressure turbine on the other shaft......
That is definitely not a PW engine. That's a GE engine. You can tell by the lip of the intake as well as the shape of the engine. This is definitely a GE engine. The engine even sounds like the GE engine used for the -400, not the PW 4056.
Air is used to get the compressor and turbines turning before fuel is injected. And the jetway is the bridge that's used to connect the airplane entrance to the terminal. I'm sure that you've walked on one!
Someone plz tell me what the noise is before they start the engine? Is it another engine running or is it something the pilot turns on before starting?
@sergiobluesman Just a notice if no-one knows already, though it may be obvious to some, the engines appear to be big, but the fans are 3 or 4 times the diameter of the actual engine... but they're still amazing, the amount of thrust they produce!!
there are two sets of blades , compressor and turbine , the compresser is driven by a motor at start and compresses the air fuel mixture until it gets hot enough to start spinning the turbine , on most engines you'll know when the turbine starts
After packs are switched off and isolation valave set to zero and duct pressure verified engine start for ground can be switched. Oil pressure increases and when the N2 reaches 25% or max motoring the start lever can be moved.
a jet engine starts off air that is forced throw the turbine causing rotation ( running up the engine ) then after so many RPM's fuel and air is ignited and the engine takes off on its own power
Aerolineas Argentinas! The King Of Skies No China Airlines,No American Airlines,No Qantas,No United,No Thai Airlines,No British,No Aeromexico NO Just Aerolineas Argentinas Aguante Aerolineas Argentinas. Quiero Ser PIloto De Aerolineas I Want To Be An Aerolineas Argentinas Pilot
The APU is started by an electric motor or an external power source. This can either supply compressed air to the pneumatics manifold start the engines or by providing power to turn the electrical generators.
On the 737 air start is used to turn the N2 compressor, packs are kept off while APU is running to achieve over 30PSI on the duct pressure, this explains why AC is observed to briefly turn off before start up.
Nice video! I love those massive GE CF6s along with their starting engine noise.
Not a second stage of the fan....
You actually see two things:
- next to the fan cone, are the IGV's (Inlet Guide Vanes) of the compressor,
- between the IGV's and the engine's cowling, are the fan's OGVs (Outlet guide Vanes), whose purpose is to stop the "spinning trend" of the airflow moved by the fan. They are shaped like a little wing.
Those are General Electric CF6s. You can tell by the rounded looking engine pods with the split exhaust duct (seperate exhaust for the fan and core). The Rolls Royce uses a blended exhaust.
i never seen a jet Engine light up that quick before. The turbo Fan was barely turning when she lit up amazing
@puffaliciouschester the CF6 is a twin spool turbofan. the low pressure compressor comprises of the fan and the booster stage on a single shaft driven by a 4 stage low pressure turbine. The high pressure compressor is driven by the 2 stage high pressure turbine on the other shaft......
Does the auxiliary power unit (onboard or overboard) have to be running in order to start engine?
Is the compressor shaft independent from the front fan shaft of that engine?
Love it. Great video... only it ends just a couple of seconds before the engine stopped accelerating and settled down to idle.
Still, very good sound!
That is definitely not a PW engine. That's a GE engine. You can tell by the lip of the intake as well as the shape of the engine. This is definitely a GE engine. The engine even sounds like the GE engine used for the -400, not the PW 4056.
@obsidiansdawn the 777-300 ge90 is very quiet on takeoff and has 115,000 lbs of thrust pretty hush hush for that much thrush huh
that's great i love this video because it's an aerolineas argentinas aircraft and i'm from Argentina!!!!!
It looks like a GE engine, but it's certainly engine number 2 you're looking at!
Out of curiosity, what exactly is that humming sound that abruptly starts at :15?
@TheRabbitFear is that not just the double galzing?? lol
Grate start suond. i like the GECF6
were you on the main deck or upper deck?
Air is used to get the compressor and turbines turning before fuel is injected. And the jetway is the bridge that's used to connect the airplane entrance to the terminal. I'm sure that you've walked on one!
Genial !!! trabajas en ARSA ?
there is a stator inside it (stationary blades) to direct airflow and aid in compression.
Someone plz tell me what the noise is before they start the engine? Is it another engine running or is it something the pilot turns on before starting?
@sergiobluesman Just a notice if no-one knows already, though it may be obvious to some, the engines appear to be big, but the fans are 3 or 4 times the diameter of the actual engine... but they're still amazing, the amount of thrust they produce!!
there are two sets of blades , compressor and turbine , the compresser is driven by a motor at start and compresses the air fuel mixture until it gets hot enough to start spinning the turbine , on most engines you'll know when the turbine starts
well ur kinda right its the burning of the fuel and the rapid increasing in the RPM of the N1 and N2
After packs are switched off and isolation valave set to zero and duct pressure verified engine start for ground can be switched.
Oil pressure increases and when the N2 reaches 25% or max motoring the start lever can be moved.
@TheRabbitFear Judging from the cabin or?
Yes, air is needed for start. Can be either the APU or the GPU the one ho supply it.
this is a hot start, not a cold start. The engine flight prep as already been done. I saw a 707 take several minutes to start.
Nice engine start
@obsidiansdawn i myself like to hear an engine WORKING too. if its quiet id think we're screwed!
@stevengo99 Put em all together and what does it make?
those things can easily flip over cars... airflow is pretty intense!
Well your doin a great job
great camera you got there
Quickly, powerful start in short time than car.
ive been wondering about the importance of the spiral patern on the nose cone does anyone know more bout it ?
So people can see that it's turning.
@@bamaslamma1003 wow thanks, i had forgotten about this question, 13 years have passed. I figured it out at some point later back then 😂
@Genners111 BA uses RR not GE engines on their 747's
look at the speed of rotation!!!! and thats just for taxi!!!!! amazing
a jet engine starts off air that is forced throw the turbine causing rotation ( running up the engine ) then after so many RPM's fuel and air is ignited and the engine takes off on its own power
i dont know why, but i love the sound on 0:15
@jjaivarun No, that is a turbofan.
I guess in a Jumbo you have to keep the key in start position longer than in a car.
It's a B744 of Aerolineas Argentinas whit the GE CF6
nice sound!
you should have kept it on longer till they spooled up all the way
747-400 Aerolineas Argentinas
un groxo total!
Aerolineas Argentinas?
Awesome sound!
amazing! i love airplane engines
the a380s engine quitest engine noise ive ever heard on a commercial airliner.
Aerolineas Argentinas!
The King Of Skies
No China Airlines,No American Airlines,No Qantas,No United,No Thai Airlines,No British,No Aeromexico
NO
Just Aerolineas Argentinas
Aguante Aerolineas Argentinas.
Quiero Ser PIloto De Aerolineas
I Want To Be An Aerolineas Argentinas Pilot
what is that, a British Airways?
there's a condor painted over the casing
I think its the two stages of the fan disk
Nice sound. :)
Yeah obviously i really noticed the differnce when i flew to australia on an a380 then back on a 747.
Its actually to scare birds away from getting sucked into the inlet
That would be the fuel pump, I guess.
cf6 engines with pw4000 spirals
Usually Engines made by General Electric aren't.
@obsidiansdawn a broken one!
I'm surprised it started, being from Aerolíneas Argentinas..
Dale Argentina!
They look like the RB211s
the condor is the logo of aerolineas argentinas
ı love it
This is so hot!
actually its a ge cf6
@obsidiansdawn a fan
climb inside, and thou shalt seek thou destiny
The video ended too quickly!
if it didn't start could they call the auto club?
it's either the company name, or it's bird hit count :D
@POTATOESLOL the almighty thrust
I was standing outside the finger, near the stairs.
GE CF6
@dkF16GEA yes??
Wanna step behind?
Aerolíneas Argentinas 747 475
Pratt& withney. :D
wrong :) these are ge cf6 engines
haha even if you jump in the engine in reverse thrust, you'll still get sucked in (;
Yes
i think its ramjet engine
Eso es Musica !!!
You mean GE...
I can smell the avtur
DA ARREPIOS
@chocolatehearthammer ...uh...ok....
si, AR.
@julesgymnast How To Speak What?
do NOT get sucked in that
...haha...! Too true!
groso!
chuck norris hairdryer
You could have at least jumped inside and given us a better view while risking your health/life/hair. How inconsiderate (being sarcastic)
@dkF16GEA sarcasm?
@dkF16GEA hahaha ok
@stevengo99 LOL
@XxSpyroKetchumxX buuahahahahaha