hotplane
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A380 Engine Noise

Thu Mar 25, 2010 10:13 am

Was struck by how loud and rattly the engines can sound on departure.

http://www.youtube.com/watch?v=Tb4azotywoQ
?
 
Danfearn77
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RE: A380 Engine Noise

Thu Mar 25, 2010 10:22 am

Thats surprising. Ive never seen an A380 take off from the outside but i have done travelled twice on it and when your in the cabin you cant hear a thing. The first time i flew it i was amazed by how quiet it was!
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EPA001
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RE: A380 Engine Noise

Thu Mar 25, 2010 10:40 am

Quoting danfearn77 (Reply 1):
The first time i flew it i was amazed by how quiet it was!

As was I when I first flew on the A380. I was fortunate enough to see/hear an A380 (Qantas) departing over Darling Harbour in Sydney last February. I heard a faint noise above me which sounded "new" to my "aviation ears".   When I looked up I was almost too late to make a picture of this beautiful low flying bird. Which to me is proof to which I can personally testify that the A380 is super-quiet. As well from the outside as on the inside.   The A380 does make a specific sound which (to me) sounds quite different from an A340-600 or a B77W.
 
Danfearn77
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RE: A380 Engine Noise

Thu Mar 25, 2010 10:48 am

Quoting EPA001 (Reply 2):
Which to me is proof to which I can personally testify that the A380 is super-quiet.

And like i say i can testify with you! Its sort of an old cliché isnt it, people saying how quiet and aircraft is but the A380 is super quiet on the inside. Shame i havent seen one take off yet!

Quoting EPA001 (Reply 2):
A340-600 or a B77W.

My LHR-JFK last year was a VS 346 and was my first time on such and aircraft and that too i thought was quiet, much more so than the 77W i thought!
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EPA001
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RE: A380 Engine Noise

Thu Mar 25, 2010 10:52 am

Quoting danfearn77 (Reply 3):
My LHR-JFK last year was a VS 346 and was my first time on such and aircraft and that too i thought was quiet, much more so than the 77W i thought!

Though I agree with you on the lower noise levels of the A340-600, I was more hinting at the difference in sound. he B77W sounds quite different to me then an A340-600. But both do not "sound" like the A380, which (to me) has a specific sound of her own.  

But I like to hear an aircraft engine, especially when I am at the spotting points near AMS to see, hear and smell as many different airliners as possible. Although they more or less all smell the same.  
 
baroque
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RE: A380 Engine Noise

Thu Mar 25, 2010 10:53 am

Quoting hotplane (Thread starter):
Was struck by how loud and rattly the engines can sound on departure.

http://www.youtube.com/watch?v=Tb4azotywoQ

Well three things. First a great opportunity to state that the thread cannot be about much at all - illegal in general, but in relation to the A380 legal cos there is not much noise to have a thread about!!!

Second is that yes the video has collected some audio of what might well be a Trent or even four Trents, but the sound track aside from having s*d all to do with the video of a hovering A380 could have been collected anywhere.

Third, if it is an A380 noise, then is it typical of them in the hover. I knew those Trents were powerful but over 500 tonnes of lift between them, now that is impressinve. I had heard of 100k engines, and of 25k engines, but 100+ tonne engines is a major advance.

PS If you cannot understand this post, "watch" the video, or non video as the case may be.

[Edited 2010-03-25 03:54:17]
 
gkirk
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RE: A380 Engine Noise

Thu Mar 25, 2010 10:58 am

Quoting danfearn77 (Reply 3):
Shame i havent seen one take off yet!

Just think of a larger A340-300, struggling to get in the air  
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EPA001
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RE: A380 Engine Noise

Thu Mar 25, 2010 11:01 am

Quoting gkirk (Reply 6):
struggling to get in the air

But there is no struggle whatsoever. The A380 needs less runway then any B77W or B747 (all at full load  ).
 
sandyb123
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RE: A380 Engine Noise

Thu Mar 25, 2010 11:11 am

Quoting danfearn77 (Reply 3):
And like i say i can testify with you! Its sort of an old cliché isnt it, people saying how quiet and aircraft is but the A380 is super quiet on the inside. Shame i havent seen one take off yet!

And I'll third that. I flew recently on the A380, I was at the back on the upper deck and apart from a 'whistle' on engine spool up I was blown away by how quiet it was! In the cruise the wind noise (normally quite prominent at the back of an aircraft) was also very quiet.

That audio sounds like one of those old A321's with CFM engines.

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frigatebird
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RE: A380 Engine Noise

Thu Mar 25, 2010 2:37 pm

Quoting EPA001 (Reply 2):
The A380 does make a specific sound which (to me) sounds quite different from an A340-600 or a B77W.

I've seen (and heard) it depart twice. Sounds to me like mix of Trent800 and GE90 with noise suppression.
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Bongodog1964
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RE: A380 Engine Noise

Thu Mar 25, 2010 3:39 pm

As the clip only shows a static aircraft, this could be of absoloutely anything. As to the volume, well it all depends on how much you have the volume turned up. Unless noise is measured using calibrated equipment, you can draw no conclusions at all.
 
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Stitch
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RE: A380 Engine Noise

Thu Mar 25, 2010 3:44 pm

Personally, it sounds pretty quiet to me.

It sounds quieter than the Trent 1000's on the 787, but I don't know how far away the SQ A380 was from the microphone compared to the 787 (which is usually quite close to the microphone).

Definitely has that Trent "buzzsaw" sound, however.

As for interior noise levels, I find the A380 very quiet on take-off, but then I am up in Suites Class so there is some sound baffling provided by the walls.
 
joakims
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RE: A380 Engine Noise

Thu Mar 25, 2010 3:54 pm

Quoting gkirk (Reply 6):
Just think of a larger A340-300, struggling to get in the air

I can not second what.

I flew on SQ 388 fron London to Singapore. What struck me was that we went directly up to cruising altitude and stayed there. No burning of fuel and make the climb in stages as usual and it did not struggle at climb after take of at all. Went straight up.

This has been discussed here before. The answers giving in those discussions was that the wings are designed for the 380-900. The wings being on a "lighter" aircraft gives it extra lift.

I am no engineer so I only pass what was discussed earlier.


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GBan
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RE: A380 Engine Noise

Thu Mar 25, 2010 4:07 pm

Quoting hotplane (Thread starter):
Was struck by how loud and rattly the engines can sound on departure.

http://www.youtube.com/watch?v=Tb4az...tywoQ

Great video, stupid me didn't even know that the A380 has a VTOL mode and can stand in the air!

 
 
BrouAviation
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RE: A380 Engine Noise

Thu Mar 25, 2010 4:11 pm

The A380 is extremely quiet. It has something to do with the turbines being assembled in a different way in the new engines, especially the EA ones.

Quoting joakims (Reply 12):
What struck me was that we went directly up to cruising altitude and stayed there.

That isn't standard, when they come across NL on their way to SIN they almost never come above FL350, and I don't believe that is the crz alt for the whole flight.
Never ask somebody if he's a pilot. If he is, he will let you know soon enough!
 
joakims
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RE: A380 Engine Noise

Thu Mar 25, 2010 4:42 pm

Quoting BrouAviation (Reply 14):
That isn't standard, when they come across NL on their way to SIN they almost never come above FL350, and I don't believe that is the crz alt for the whole flight.

I don´t know what is standard or not.
Just tell what I experienced on my flight from LHR to SIN. We went directly up to 36.000feet after take off and stayed there until descending to SIN

Me not being a pilot. I leave the flying to them. If they went directly up this time I guess they have reasons to do so.

This was only a reply to the quoted text in my reply about A380 slow climb.

I refered to another discussion in my earlier reply about climb performance
Here is the answer I got in that thread.

Following text is quoted from another thread.

Firstly the A380's wing/lift capability was designed with growth to at least 650 tonnes built in, so even at the 560 tonne MTOW, she's going to climb pretty well.

Secondly, testing showed that actual lift was 2%-3% more than was anticipated. This showed up in lower landing speeds and take-off speeds.

Thirdly, LHR-SIN is about 5 600Nm, eastbound. It could be as little as 5 000Nm-5 200Nm Air distance with the following jet stream. An A380-800 with what I think is a "typical" full load around 70-75 tonnes could be taking off at as little as 500-510 tonnes ("little" )

She does climb pretty quick...
 
pnwtraveler
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RE: A380 Engine Noise

Thu Mar 25, 2010 5:05 pm

Hearing the A380 take off numerous times at YYZ my impression is that the aircraft is substantially quieter than others. Much quieter than a KLM A330 or AI B777 that took off right before or immediately after. Also quieter than a FedEX MD11. Not only are the engines quieter when close, but the sound seems to die off much quicker. The jetblast is unbelievable afterwards so you can understand the FOD concern. Grass and small sticks blown up and when the wind is right all over the spotters  .
 
BrouAviation
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RE: A380 Engine Noise

Thu Mar 25, 2010 5:19 pm

Quoting joakims (Reply 15):
I don´t know what is standard or not.

No hard feelings, I do believe you!

Quoting pnwtraveler (Reply 16):
Also quieter than a FedEX MD11.


When an MD-11 starts to roll, the rumble is heard miles away. Magnificent sound, deep bass!
Never ask somebody if he's a pilot. If he is, he will let you know soon enough!
 
pillowtester
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RE: A380 Engine Noise

Thu Mar 25, 2010 5:23 pm

I'm betting this poster is probably referring to the aptly-named "buzzsaw" sound during full power. It is actually pretty common, but doesn't fit most people's stereotyped impression of what a jet engine is "supposed" to sound like. It is described by ScientificCommons thusly: “Buzz-saw” noise is radiated from a turbofan inlet duct when the fan tip speed is supersonic. Different manufacturers and models produce varying levels of this sound, ranging from inaudible to overpowering. A notorious example would be the RB211 family. The such-equipped L-1011 in the video below sounds almost identical to whatever is making the noise in the video linked by the original poster. You'll see later on it's much quieter.

http://www.youtube.com/watch?v=QdP-VMcREyg

Semi-related and also probably equally interesting is the intense, ear-shattering noise produced by many Soviet-era jetliners on takeoff. However, they become much much quieter than even many contemporary western types during cruise.

Compare this IL-62 takeoff:

http://www.youtube.com/watch?v=_Gi40_pRL4Y

...with this IL-62 in cruise:

http://www.youtube.com/watch?v=L5YQQwsaEsk

[Edited 2010-03-25 10:35:07]
...said Dan jubilantly.
 
georgiaame
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RE: A380 Engine Noise

Thu Mar 25, 2010 6:14 pm

Purely anecdotal, but I was leaving Heathrow to come home a few months ago, and as my Delta 764 was pulling onto the taxiway, a 380 was lumbering down the active runway just in front of us. I saw about 20 seconds of the roll, and was amazed that it was pure silence from outside until about the last 5 seconds of my viewing. What I heard was a very muffled rumble, nothing like the noisier takeoff grumbling roar that you always hear from the jets in front of you. I knew the brute was quiet inside (my preference for A aircraft over B), but was really surprised at how quiet it had to be on the outside. Let's hope AF brings them into Atlanta...
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pnwtraveler
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RE: A380 Engine Noise

Thu Mar 25, 2010 6:19 pm

Personally I like to hear the deep loud growl on take off whether inside or outside the aircraft. Loved the deep bass, almost a moan, the old L1011 made with the RR engines when each started to spool. The newer engines have a much smaller "footprint" of sound. Will be very interesting to hear the 787 and 748 on take off roll live as well. Now on a AC A333 for example all you hear is a much quieter start up, kind of akin to a vaccuum starting at a distance  .
 
KPDX
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RE: A380 Engine Noise

Thu Mar 25, 2010 6:30 pm

Cool. I'd rather have noisy planes than quiet ones.
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Starlionblue
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RE: A380 Engine Noise

Thu Mar 25, 2010 11:49 pm

Quoting KPDX (Reply 21):
Cool. I'd rather have noisy planes than quiet ones.

I'd rather have quiet ones. They generate less whining from the Nimbys to drown out the plane.  
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dc863
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RE: A380 Engine Noise

Mon Mar 29, 2010 2:10 am

Let the Nimbys rant till they're blue in the face then fly a non hushkitted 707 or -3A 747-100 overhead at 3000 ft and see what they say then.
 
KPDX
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RE: A380 Engine Noise

Mon Mar 29, 2010 2:22 am

Quoting dc863 (Reply 23):
Let the Nimbys rant till they're blue in the face then fly a non hushkitted 707 or -3A 747-100 overhead at 3000 ft and see what they say then.

How about Concorde?

 
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dc863
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RE: A380 Engine Noise

Mon Mar 29, 2010 6:28 am

................or a BAC 1-11, or Trident 3.

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