UTA_flyinghigh
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Quietest/noisiest Aircraft (no S!)

Wed Mar 31, 2004 8:24 pm

Out of curiosity, what are the quietest/noisiest aircraft in the following categories ?

1) Single props
2) Twin-engined GA aircraft
3) Turboprops
4) RJ's
5) Narrowbodies
6) Widebodies
7) Ventilators

UTA
Fly to live, live to fly - Air France/KLM Flying Blue Platinum, BMI Diamond Club Gold, Emirates Skywards
 
zak
Posts: 1926
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RE: Quietest/noisiest Aircraft (no S!)

Wed Mar 31, 2004 8:53 pm

1) no clue
2) no clue either
3) my bet: dash8-400Q
4) all too loud when inside the cabin
5) 757 due to the fact that they can pretty much operate at idle thrust all the way  Smile
6) 747-400
7) A340-300x (since it can not be in cat6)
10=2
 
boeingflying31
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RE: Quietest/noisiest Aircraft (no S!)

Thu Apr 01, 2004 2:12 am

1) Loudest I've flown was a Cessna 182
2) Cessna 310
4) I've only flown on a CRJ
5) 757
6) The most powerful plane I've flown on was the MD-11, but the loudest would probably be the A330 or the 747.
7) no clue

-bf31
 
QantasA332
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RE: Quietest/noisiest Aircraft (no S!)

Thu Apr 01, 2004 6:34 am

With aircraft noise levels you really can't just guess -- hard dB facts are needed. And some distinction needs to be made between exterior noises footprint/intensity and interior noise levels...

As far as your #6, Boeingflying31, the A330 is definitely not the loudest widebody. I don't know if you've ever flown on one of them, but for their "genre", they're one of the quietest around...

Cheers,
QantasA332
 
sushka
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RE: Quietest/noisiest Aircraft (no S!)

Thu Apr 01, 2004 6:40 am

Cessna 210
Cessna 310
An24
Dunno
Tu134
Il86
Dunno
Pershoyu Spravoyu Litaki!
 
3lions
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RE: Quietest/noisiest Aircraft (no S!)

Thu Apr 01, 2004 7:20 am

The learjet 23 and 24 and 25 have to be the loudest.
Have you ever marshalled one out.
 
corey07850
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RE: Quietest/noisiest Aircraft (no S!)

Thu Apr 01, 2004 7:48 am

I'd have to agree with the Lear 23... I've heard it has the same engines as a T-38 fighter?

 
mNeo
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RE: Quietest/noisiest Aircraft (no S!)

Thu Apr 01, 2004 7:58 am

4) the BEa 146 has to be the quietest RJ there.
6) the A340-200 is also a very quiet plane
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timz
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RE: Quietest/noisiest Aircraft (no S!)

Thu Apr 01, 2004 12:07 pm

Can't figure out whether the questioner is asking about cabin noise or noise on the ground.
 
SlamClick
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RE: Quietest/noisiest Aircraft (no S!)

Thu Apr 01, 2004 12:14 pm

The older DH or Hawker 125 made more noise taxiing than many planes do taking off. I don't think dB is the entire story. There is dB at a given frequency that makes them offensive to humans.

For light twins, the BE-50 twin bonanza was pretty damn loud.
Happiness is not seeing another trite Ste. Maarten photo all week long.
 
OPNLguy
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RE: Quietest/noisiest Aircraft (no S!)

Thu Apr 01, 2004 12:49 pm

Assuming we're talking about loudest/quietest based upon being -outside- the aircraft, I'd have to opine the loudest narrowbody is/was the BAC-111. I thought is was louder than the Concorde, but that's just me...
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
 
B2707SST
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RE: Quietest/noisiest Aircraft (no S!)

Thu Apr 01, 2004 3:44 pm

It depends which noise standard you use: community noise three miles from the airport after takeoff ("takeoff "), airport noise 1500 feet from the runway at takeoff ("sideline"), or community noise under the approach path ("approach").

According to the FAA's noise figures, the quietest a/c in each category is:

Private/Biz Jets:
- Takeoff: Cessna 560 Encore (70.3 dB)
- Sideline: Aerospatiale SN601 Corvette (81.0 dB)
- Landing: Cessna S550 Citation S/II (85.1 dB)

Regional Jets:
- Takeoff: Fairchild-Dornier 328JET-300 (76.1 dB)
- Sideline: Bombardier CL-600-2B19 CRJ-200 (82.2 dB)
- Landing: Fokker F70 (87.7 dB)

Narrowbody Airliners:
- Takeoff: McDonnell-Douglas MD-90-30 (77.2 dB)
- Sideline: Boeing 737-500 (88.2 dB)
- Landing: Boeing 717-200 (91.3 dB) *
* if you consider the 717 an RJ, the next narrowbody is the MD-90-30 (91.7 dB)

Widebody Airliners:
- Takeoff: Boeing 767-300ER (81.5 dB)
- Sideline: Airbus A300B1 (90.7 dB)
- Landing: Boeing 767-200 (95.7 dB)

--B2707SST
Keynes is dead and we are living in his long run.
 
QantasA332
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RE: Quietest/noisiest Aircraft (no S!)

Thu Apr 01, 2004 3:53 pm

Thanks very much, B2707SST, for finally posting an actual dB-level comparison... Out of curiosity, where'd you get that data?

Cheers,
QantasA332

 
B2707SST
Posts: 1258
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RE: Quietest/noisiest Aircraft (no S!)

Thu Apr 01, 2004 5:08 pm

The FAA's Office of Environment and Energy has noise data for all US and foreign certificated aircraft. I looked up jet aircraft, but they also have data for transport and GA prop planes and helicopters:

http://www.aee.faa.gov/noise/AC_36-1H.htm

Unfortunately, I've never been able to find data on cabin noise levels. That would be interesting to see.

The same data for noisiest airliners (guess which big jet wins!):

Private/Biz Jets:
- Takeoff: Sabreliner 60 (95 dB)
- Sideline: Learjet 24D (104 dB)
- Landing: BAe HS 125-1B (104.8 dB)

Regional Jets:
- Takeoff: Fokker F28 MK4000 (92.9 dB)
- Sideline: Fokker F28 MK4000 (101.7 dB)
- Landing: Fokker F28 MK2000 (101.8 dB)

Narrowbody Airliners:
- Takeoff: BAe/Aerospatiale Concorde (119.5 dB)
- Sideline: BAe/Aerospatiale Concorde (112 dB)
- Landing: BAe/Aerospatiale Concorde (117 dB)

Widebody Airliners:
- Takeoff: Boeing 747-200 (110 dB)
- Sideline: Ilyushin IL-86 (104.2 dB)
- Landing: Ilyushin IL-76TD (108.9 dB)
* Noisiest pax widebody on landing is the Boeing 747-200 (107.8 dB)

--B2707SST

[Edited 2004-04-01 09:27:31]
Keynes is dead and we are living in his long run.
 
HaveBlue
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RE: Quietest/noisiest Aircraft (no S!)

Sat Apr 03, 2004 4:12 pm

The loudest sounds I've probably ever heard, aside from close lightning, is:

An AV-8B Harrier hovering
A B-1 Bomber in full afterburner
The Sonic Boom of the Shuttle returning to Cape Kennedy.

I seriously doubt any plane beats a harrier hovering for shear noise levels. The B-1 is close behind. And the double sonic boom of the shuttle is physically audible event.
Here Here for Severe Clear!
 
IMissPiedmont
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RE: Quietest/noisiest Aircraft (no S!)

Sat Apr 03, 2004 4:56 pm

Not looking at the official numbers, I'd say the MD-80 is the loudest current major airliner flying today in real terms, my ears.
The day you stop learning is the day you should die.
 
canoecarrier
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RE: Quietest/noisiest Aircraft (no S!)

Mon Apr 05, 2004 5:17 pm

1: DHC-Beaver
2: Lear 23
3: KA-100 or Metroliner (got to love the Garrett Engines)
4: No clue
5: 707 not reengined
6: 747-200

Love flying in the Beaver, but any single with a big radial in it is fun to fly.
The beatings will continue until morale improves
 
KYIPpilot
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RE: Quietest/noisiest Aircraft (no S!)

Tue Apr 06, 2004 12:46 am

From my experience, the loudest single prop are the Beechcraft Bonanzas. On take-off, On Bonanzas without Q-tip blades, the prop tips become supersonic, and create quite a bit of noise.

For turbo props, the old Lockheed Electra 188's are loud taxiing.

Lear 23's for small jets.
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