Kuhne From Mexico, joined Jun 2006, 51 posts, RR: 0 Posted (7 years 6 months 6 days 4 hours ago) and read 15994 times:
after reading many posts on how airbus planes are much quieter than some boeings, I was happy to get into one for the first time a few weeks ago, I flew Mexicana's shiny new Airbus 319 and 318.. I couldn't wait to see how the takeoff would sound, being used to flying 737-200 planes, I know what noise is, I was expecting a real difference.... until the thing took off and I tought I was flying in a world war 2 plane. WTF??? seriously, did I just pick up a cab in Mexico City? what the hell is up with that sound? it sounds horrible!
to it's credit, the plane is fabulous and the landing was really really quiet, unlike the 737-200 with its reverse thrusters that sounds like im about to go to the moon or something.
AlexPorter From , joined Dec 1969, posts, RR:
Reply 7, posted (7 years 6 months 6 days 3 hours ago) and read 15603 times:
I have noticed that sound before on various A320-series jets but I've mostly noticed it on older jets, unless perhaps it's just a Rolls-Royce thing (the old A320s I've flown were HPs with RR engines, while the newer ones were A318s and A319s with F9 and NW with CFMs (I assume). So perhaps its an engine thing. All I can say is that the CFMs sound the same as 737NGs because it's pretty much the same engine adapted for a different nacelle, etc. Meanwhile the RR engine is a whole separate engine so maybe that's it.
Also, this buzzing sound is noticable from the ground. Here near PHX, when I hear that buzzing sound it's either SOME of the US A320s or a US 757. Both of which use RR engines. The US 737s don't do it, and the Southwest 737s have more of a typical rushing roar sound so to speak, but not a buzzing.
BrianDromey From Ireland, joined Dec 2006, 3988 posts, RR: 10
Reply 9, posted (7 years 6 months 6 days 2 hours ago) and read 15517 times:
Quoting AlexPorter (Reply 8): it's either SOME of the US A320s or a US 757. Both of which use RR engines. The US 737s don't do it, and the Southwest 737s have more of a typical rushing roar sound so to speak, but not a buzzing.
All of the USAir (East) are fitted with CFM 65 engines.
Both the HP & US 757 are fitted with RR's
There is not a single A320 in the entire world fitted with RR engines! The other engine choice on the A320 is the IAE V2500, it is manufactured by P&W, MTU, a Japaneese consortium & RR, IIRC. The RRs on 757s and IAE's on A320s do look similar though.....
Maybe the difference in noise is due to the shape of the engines on the 737 and A320, along with aerodynamic differences.....certainly an FR 737 (CFM) sounds very different to an EI A320 (also CFM powered)
Next flights: MAN-ORK-LHR(EI)-MAN(BD); MAN-LHR(BD)-ORK (EI); DUB-ZRH-LAX (LX) LAX-YYZ (AC) YYZ-YHZ-LHR(AC)-DUB(BD)
Kaneporta1 From Greece, joined May 2005, 766 posts, RR: 12
Reply 10, posted (7 years 6 months 6 days 2 hours ago) and read 15492 times:
Quoting Kuhne (Thread starter): I know what noise is, I was expecting a real difference.... until the thing took off and I tought I was flying in a world war 2 plane. WTF??? seriously, did I just pick up a cab in Mexico City? what the hell is up with that sound? it sounds horrible
Let me guess, you were sitting somewhere between rows 1 and 5...
I'd rather die peacefully in my sleep, like my grandfather, not terrified and screaming, like his passengers
Kuhne From Mexico, joined Jun 2006, 51 posts, RR: 0
Reply 12, posted (7 years 6 months 6 days 1 hour ago) and read 15324 times:
Quoting DJ738 (Reply 12): Let me guess, you were sitting somewhere between rows 1 and 5...
Yes, I was in three flights, two of them in a A318 in seats 3f the first time and 1f the second time, the other one was a a319 and I was in 1f. these are the mexicana airbus which are supposed to be brand new and stuff.
My girlfriend was siting in row six with her mother and she too when we got off the plane said "did we just ride in a propeller plane? what the hell was that noise!"
I also flew (today) on the third row on an old 737-200, the sound was nowhere as bad, however once in the air and on landing, no comparison at all, the bus was quiet as hell.
747fan From United States of America, joined Jun 2007, 1195 posts, RR: 1
Reply 15, posted (7 years 6 months 5 days 21 hours ago) and read 15019 times:
That sound that you're hearing can only be heard when sitting in front of (or even with) the engines, and is the sound of the fan blades reaching a supersonic speed.
Virtually every turbofan engine, particularly high-bypass ones, make this distinctive sound. The particular lawn-mower sound you are describing is rather unique to the CFM56. That sound can be heard on the 737 classic/NG, A340, and DC-8 Super 70's (and KC-135, for that matter). The IAE V2500 also sounds pretty similar, although it has a little more of a whine to it, maybe its due to the wide chord fan blades (like the RB211 on the 744, 763, and 752).
If you though the A320 sounded interesting, catch a ride in the front of a GE90-powered 777 (if you're fortunate enough to be able to afford F or J class). Those things are quite loud and sound like a heavy duty air compressor. Its a very unique sound!
You've got the vacuum cleaner-like whine of the JT8D's, which is a very unique (and loud, if you're in the back, although JT8D's almost get quieter when they hit takeoff power compared to "stabilization" power). The CF6's/PW4000/JT9D sound sort of like a massive In Sink Erator garbage disposal (without the food grinding sound) when you're sitting up front. And you can't forget the RB211 - its kinda similar to the IAE V2500, but sounds more authorative and powerful.
You can also hear this sound on the ground when a turbofan-powered jet take off, although its more prominent with some planes than others. For example, the CFM A320's (and definitely A340's, DC8-70's) seem more prominent on the outside than the CFM 737's. On the other hand, widebodies powered by CF6-80's and PW4000's have a less noticeable fan growl, just a prominent and distinctive "screech" from the compressors as they fly overhead. On the other hand, the 757, rather its in RB211 or PW2000 form, sounds very distinctive on takeoff with a very prominent fan growl. And don't get me started on DC-10's, L-1011's, or 747 classics.
Here's a video of an Iberia CFM56-powered A320 taking off. The lawnmower sound is very obvious in this video, I assume that's the sound you were referring to: www.flightlevel350.com/aviation_video.php?id=7375
Here's an outside video IAE V2500-powered UA A319 taking off from Sangster Intl. in Montego Bay. Perfectly represents that buzz sound. I would love to stay at that resort the video was taken from, nothing like spotting all day long from the beach! www.youtube.com/watch?v=brkHJyrxZDw
Here's a GE90-powered BA 777 taking off from LHR. If you didn't like the A320's sound, wait until you hear this thing! Yikes! By the way, T5 looks nice! www.youtube.com/watch?v=vzYgyJlcYQg
Sparkingwave From South Korea, joined Jun 2005, 679 posts, RR: 0
Reply 16, posted (7 years 6 months 5 days 18 hours ago) and read 14819 times:
Quoting Kuhne (Thread starter): until the thing took off and I tought I was flying in a world war 2 plane. WTF??? seriously, did I just pick up a cab in Mexico City? what the hell is up with that sound? it sounds horrible!
You know what? I noticed this too flying on an NH A320 between ICN and NRT. On takeoff there was a loud buzzing sound from the engines and it was very annoying. It didn't subside until the plane had leveled off at higher altitude. I couldn't believe the noise level and was quite disappointed. But until your post I didn't know if it was just that aircraft or a more common problem.
Flights to the moon and all major space stations. At Pan Am, the sky is no longer the limit!
Kuhne From Mexico, joined Jun 2006, 51 posts, RR: 0
Reply 21, posted (7 years 6 months 5 days 16 hours ago) and read 14084 times:
Wow! thanks for the explanation and the videos, yes that first airbus video you posted is exactly what I meant, you can't really hear the noise that much in the video unlike in real life which was really loud but thankfully it gets quiet after a while.
I've been on a 777 before, 4 times actualy but never that near an engine I don't think or maybe I just dont remember the sound.
Kappel From Suriname, joined Jul 2005, 3533 posts, RR: 16
Reply 22, posted (7 years 6 months 5 days 15 hours ago) and read 13686 times:
Quoting 747fan (Reply 17): catch a ride in the front of a GE90-powered 777 (if you're fortunate enough to be able to afford F or J class). Those things are quite loud and sound like a heavy duty air compressor. Its a very unique sound!
Quoting Kuhne (Reply 23): I've been on a 777 before, 4 times actualy but never that near an engine I don't think or maybe I just dont remember the sound.
I flew KLM AMS-JFK-AMS last year in row 11, right next to the engine. With KLM, economy is from row 10 on, and row 10 to, say 13 are right next to the engines. Amazing sound indeed on takeoff, loved it. And those bad boys are huge when you sit right next to them!!!