OOPJV From Belgium, joined Jun 2003, 48 posts, RR: 0 Posted (10 years 11 months 1 week 5 days 23 hours ago) and read 5082 times:
Last week, I flew on a Spanair A320 (actually the newest in the fleet, EC-IOH, delivered last May) from Munchen to Valencia, and I was sitting in row 4, just next to the RR-engine. At take-off, the very specific roaring of the engine was very loud, until almost top of climb. Only the RR powered A-320's (and of course A319's and A-321's) produce this particular sound, which seems to be very specific for just this type of engine, and is totally different from the sound of every other jet engine. This sound is almost like the sound of a propeller. What causes this sound? Is it the fan? It disappears when the engine power is reduced after take-off.
Thanks for your information.
Positive rate From Australia, joined Sep 2001, 2143 posts, RR: 1
Reply 8, posted (10 years 11 months 1 week 5 days 10 hours ago) and read 4677 times:
Even the 737-800 makes that sound if you're sitting right next to or just in front of the engine. But the A320 is really distinct. When an A320 is flying straight towards you it sounds different- more like a "whoooooooo" sound then side-on it's totally different. From inside the "buzzsaw" sound is very loud.
Musang From United Kingdom, joined Apr 2001, 861 posts, RR: 7
Reply 11, posted (10 years 11 months 1 week 4 days 19 hours ago) and read 4579 times:
B727-200 has it right.
Having flown frequently on BA's A320s, my heart sinks if a CFM machine pulls up to the gate. You expect the buzzsaw noise to disappear at reduction height as it reverts to climb thrust, but noooooo! its with you the whole time till descent.
I'm sure its different in the back, but I seem to find myself over the wing or forward of it every time.
The IAE 2500s on the new ones are a delight in comparison.
Philhyde From United States of America, joined Aug 2003, 678 posts, RR: 1
Reply 12, posted (10 years 11 months 1 week 3 days 9 hours ago) and read 4481 times:
I agree with Jim and others, in that I positively love that noise! Most recently I flew on an America West 757 from PHX to SFO in first class, well in front of the engines but prime "buzz saw noise" location. In my experience, this noise seems to be quite unique to the Rolls Royce turbofans.
7E7 From Australia, joined Aug 2003, 159 posts, RR: 1
Reply 14, posted (10 years 10 months 4 weeks 1 day 20 hours ago) and read 4380 times:
I guess it is the same sound I heard on Gulf Air's A340's and A320's on my last trip. Sitting in 2nd row 1st class on both types, I first thought something was wrong, as I had never flown in the position on an airbus before. The sound faded away while reaching the top of climb/cruise speed/altitude.
Jafa From United States of America, joined Aug 2003, 782 posts, RR: 4
Reply 15, posted (10 years 10 months 3 weeks 9 hours ago) and read 4216 times:
All of NWA's DC10's, A319/320, 757's make that noise on takeoff. On the airbus and 757 you can hear it if seated forward of the wing during takeoff, and on the DC10's you can hear in the entire cabin due to the tail mounted engine. NWA uses Pratt & Whitney engines. Acutally on the 319 if seated at the 1L door it can be very loud.
KaiTakFan From United States of America, joined Oct 1999, 1588 posts, RR: 6
Reply 17, posted (10 years 10 months 2 weeks 3 days 16 hours ago) and read 4062 times:
I am shocked nobody has mentioned the growling sound that a RR RB-211 powered 747-400 makes during take off! That is by far my favourite! The BA 777-200 with RR engines sounds very nice as well!
Beefmoney, Have you manged to watch Speed Bird 288 Heavy take off from Runway 26 during the evening? If you are at the spot north of there... I say that is my favourite place to watch departures!! You can just feel the power since you are so close!
Srbmod From , joined Dec 1969, posts, RR:
Reply 18, posted (10 years 10 months 1 week 6 days 11 hours ago) and read 3969 times:
Rolls-Royce engines make the coolest sound. The deep gutteral growl of them is almost primal. I really miss Delta's L-1011s, you'd always known when one was cranking its' engines across the way on the next concourse, that roar would reverbrate even inside a pillbox. It would make the metal siding inside the stairwells (on ASA's gates on C @ ATL) rattle in tune with the engine. Rolls-Royce engines are by far my favorite.
Beefmoney From United States of America, joined Oct 2000, 1113 posts, RR: 4
Reply 19, posted (10 years 10 months 1 week 5 days 10 hours ago) and read 3912 times:
Ive never been able to catch the British depart since, as you mentioned, it is so late in the evening. When I do catch it, Im on top of the parking garage which, although gives you a great overview, doesnt give you the sense of power you mention.
That spot just north of 26, the dirt road, is always a great place to sit and watch landings when your eating lunch. Ive done that many times, but not so much as of late due to security guards getting jumpy.
Do you know if the restaraunt just north of 8 is still closed? I used to LOVE going up on top of the building when I was younger. But now it seems to be fenced off.
Bruce From United States of America, joined May 1999, 5043 posts, RR: 15
Reply 20, posted (10 years 10 months 1 week 5 days 8 hours ago) and read 3901 times:
Reading these posts I am seeing that everyone thinks their plane make a specific noise......
The A320 family does have a distinct sound not shared by any others. I have heard it on the outside watching one take off. On friday will be my first ride inside of one. But their sound is different than any other.
The 737-800 does not sound like an Airbus on takeoff, from the outside.
Also the CRJ has a distinct sound.
Bruce Leibowitz - Jackson, MS (KJAN) - Canon 50D/100-400L IS lens
KaiTakFan From United States of America, joined Oct 1999, 1588 posts, RR: 6
Reply 23, posted (10 years 10 months 1 week 2 days 17 hours ago) and read 3794 times:
The Left Seat Restaraunt's viewing deck is still closed! Very disapointing to see that!! I loved haning out up there as well! But I guess the dirt lot at 26 is the best we have for now! Speaking of which... how often are you out there? I am usually there 3 times a week or so after class. the airport is so close to ASU I cant help but go to see Lufthansa or British Airways!
Asgeirs From Iceland, joined May 2001, 516 posts, RR: 1
Reply 24, posted (10 years 10 months 5 days 9 hours ago) and read 3721 times:
My first and only A320 flight was 3 years ago. Although it was my first flight since I was about 13 (9 years earlier), I noticed right away that the V2500 engines sounded quite different from the others.
I have flown 19 times since then (mostly on CFM-56 powered 737's, but also a few times on P&W and RR powered 747's + turboprops) and none of them have even sounded remotely similar to the V2500's. I will most likely be flying on 757, 767 and 777 aircrafts next month for the first time, so it will be interesting to compare their engine sounds to the others.
Reykjavik Aviation Photography - Just bring the aircraft to us and we'll photograph them! :-)
F-WWAI From Andorra, joined Dec 1999, 131 posts, RR: 0
Reply 25, posted (10 years 10 months 4 days 23 hours ago) and read 3705 times:
not sure we need to extend this any further.
just note: the particular sound is named "pure tone" noise, some times oddly called "buzz saw noise".
it characterises a high by-pass ratio turbofan, thus it is coming with all modern engines now to some extent.
it is produced by the fan blades running at relative supersonic airspeed. if there is one frequency emerging only and representing the No. of Blades times Revs, then they call it BPF, the Blade Passing Frequency, if blades group together (totally arbitrary) then a series of frequency emerge; this looks like toothes of a saw on the noise spectrum and sounds like what you folks have heard.
the fan speed varies significantly after take off and the fan mach number changes with altitude and flying speed, thats why this characteristical sound vanishes in climb quite rapidly.
the manufactureres tune the engine ai intakes to absorb most of that sound energy, but like so often in life, they cannot twist the physics totally away.