jamesjimlb
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The Real Whisperjet?

Sun Sep 24, 2006 1:12 pm

i have heard about two different airplanes being called whisperjet. 727 and the avroliner. if you know any others please respond.
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Qantas767
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RE: The Real Whisperjet?

Sun Sep 24, 2006 1:27 pm

Eastern named their L-1011s whisperliners

[Edited 2006-09-24 06:28:30]
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remcor
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RE: The Real Whisperjet?

Sun Sep 24, 2006 1:31 pm

That's what you call marketing... I mean they may have been quieter, but to say that they're as loud as a whisper is stretching it thin.
 
AirlineBrat
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RE: The Real Whisperjet?

Sun Sep 24, 2006 2:21 pm

Well the farther towards the front of the cabin, the quieter it is.....
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PanAm747
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RE: The Real Whisperjet?

Sun Sep 24, 2006 2:37 pm


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Ironic name "Whisperjet" - early 727-100's, -200's and DC-9's were some of the LOUDEST aircraft ever made!!

I can still when a cargo 727 is on approach to SAN - it is audible at a level MUCH higher than other aircraft. Doesn't diminish from its grace and elegance, though...
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SWISSER
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RE: The Real Whisperjet?

Sun Sep 24, 2006 5:23 pm

Quoting Airlinebrat (Reply 3):
Well the farther towards the front of the cabin, the quieter it is.....

Let's call that the whisper-cabin!
the 340 is my choice then!  Wink

I have to say though that the Avro is relatively quiet, until they open up there flaps, until now I have no clue what that sound actually is or how come a flap can produce such a sound, I guess drag...
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Bruspotter
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RE: The Real Whisperjet?

Sun Sep 24, 2006 9:49 pm

Quoting SWISSER (Reply 5):
I have to say though that the Avro is relatively quiet, until they open up there flaps

Anyone living in the vicinity of BRU will be familiar with the sound of an Avro lowering or retracting its flaps. The hospital where I work is on the flight path out of BRU about 2-3 minutes out (flying time). Lots of SN's Avros retract their flaps about this point and I can hear that whoosh inside the operating room even through double glass.

The sound of the raising/lowering flaps inside the cabin could be quite alarming to someone who does not know what is making the noise, as it comes on so suddenly. It is a whining droning sound which gets increasingly higher or lower in pitch depending on whether the flaps are being extended or retracted.
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gr8slvrflt
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RE: The Real Whisperjet?

Sun Sep 24, 2006 10:08 pm

Eastern Airlines coined the name Whisperjet for it's new Boeing 727s in 1964. Since the engines were in the rear, the noise in the cabin was lower than on competing 707s, 720s, DC-8s, 880s, and 990s. From the outside the 727s were much quieter than the screaming water-injected turbojets then common. The Whisperjet moniker was later added to the Eastern DC-9 fleet while the widebodied L-1011s and A-300s were called Whisperliners. When it comes to noise, it's all relative.
I work for Southwest, but the views expressed are my own and do not necessarily represent those of Southwest.
 
jrowson
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RE: The Real Whisperjet?

Sun Sep 24, 2006 10:47 pm

Cabin noise seems to vary greatly, but one of the most impressive i've been on in recent times has to be a Qantas A333. Once cruising, even sat at the back they are impressively quiet and comfortable.
James Rowson
 
SWISSER
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RE: The Real Whisperjet?

Sun Sep 24, 2006 10:52 pm

Quoting BRUspotter (Reply 6):
Anyone living in the vicinity of BRU will be familiar with the sound of an Avro lowering or retracting its flaps. The hospital where I work is on the flight path out of BRU about 2-3 minutes out (flying time). Lots of SN's Avros retract their flaps about this point and I can hear that whoosh inside the operating room even through double glass.

Agreed!
I don't live in Belgium right now, but all the way on the ILS capture point of 25L you hear that growl as well!
(BTW, what hospital is that? Kortenberg?)

Quoting Gr8SlvrFlt (Reply 7):
When it comes to noise, it's all relative.

yeah, I think that's the truth, even a glider makes noise!
What time is top of descent?
 
JakTrax
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RE: The Real Whisperjet?

Sun Sep 24, 2006 10:53 pm

The Avro is extremely quiet, as was its predecessor, the 146, although from the inside they are quite noisy. They make a unique sound on taxiing and take-off, and the only other aircraft I can think of which makes similarly quiet sounds is the EMB-145 (which we at MAN tend to nickname 'hairdryers').

Karl
 
Bruspotter
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RE: The Real Whisperjet?

Sun Sep 24, 2006 11:21 pm

Quoting SWISSER (Reply 9):
(BTW, what hospital is that? Kortenberg?)

No, AZ-VUB in Jette.
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EA CO AS
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RE: The Real Whisperjet?

Mon Sep 25, 2006 4:23 am

Quoting PanAm747 (Reply 4):
Ironic name "Whisperjet" - early 727-100's, -200's and DC-9's were some of the LOUDEST aircraft ever made!!

Ironic today, yes. In their day, they were among the quietest jet aircraft around though.
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BAtriple7
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RE: The Real Whisperjet?

Mon Sep 25, 2006 5:23 am

Quoting SWISSER (Reply 5):
I have to say though that the Avro is relatively quiet, until they open up there flaps, until now I have no clue what that sound actually is or how come a flap can produce such a sound, I guess drag...

Yep, sounds like a bomb's been dropped  Smile I think rather than drag it's the sound of the moving parts, no?
 
SWISSER
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RE: The Real Whisperjet?

Mon Sep 25, 2006 5:29 am

Quoting BAtriple7 (Reply 13):
I think rather than drag it's the sound of the moving parts, no?

Could be as well, although it is unlikely that any hydraulic pump or cylinder makes SO MUCH noise!
we need an Avro-BAe expert to break this myth!
What time is top of descent?
 
access-air
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RE: The Real Whisperjet?

Mon Sep 25, 2006 5:30 am

Quoting BAtriple7 (Reply 13):
Quoting SWISSER (Reply 5):
I have to say though that the Avro is relatively quiet, until they open up there flaps, until now I have no clue what that sound actually is or how come a flap can produce such a sound, I guess drag...

Yep, sounds like a bomb's been dropped Smile I think rather than drag it's the sound of the moving parts, no?

I believe that is the sound of the flap motors and the jackscrews as they retract or extend the flaps...I have been on the 146 100, 200 and 300 series and they all make the same noise....Its just like the sound on say like a 737 or 727 with the electric motor raising or lowering their flaps....

Access-Air
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RIXrat
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RE: The Real Whisperjet?

Mon Sep 25, 2006 6:22 am

Naw, on the Avro what scares passengers the most is the extraction of the landing gear with a definite thump on the end when it has locked. A very definite in-flight cabin noise.
 
Jamie757
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RE: The Real Whisperjet?

Mon Sep 25, 2006 6:37 am

Quoting SWISSER (Reply 5):
I have to say though that the Avro is relatively quiet, until they open up there flaps, until now I have no clue what that sound actually is or how come a flap can produce such a sound, I guess drag...

I would agree with this, however, if you have a quick look here...

BAe146 Descent (by BAe146QT Sep 24 2006 in Tech Ops)

Read reply number two, it may help to shed a little more light on the reason for the noise.

Rgds.

[Edited 2006-09-24 23:38:40]
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LTU932
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RE: The Real Whisperjet?

Mon Sep 25, 2006 6:41 am

Quoting PanAm747 (Reply 4):
Ironic name "Whisperjet" - early 727-100's, -200's and DC-9's were some of the LOUDEST aircraft ever made!!

You're wrong. This was much louder:

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^^A watercooled pure jet 707, not one with turbofans.  Wink
 
tu204
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RE: The Real Whisperjet?

Mon Sep 25, 2006 7:15 am

TNT cargo calls their Tu204s "whisperjets".
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jfk777
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RE: The Real Whisperjet?

Mon Sep 25, 2006 7:48 am

The L-1011 were quiet airplanes, but the "Whisperjets", those Eastern 727 were NOISY for all they years they flew over my house in Palm Beach.
 
captaink
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RE: The Real Whisperjet?

Mon Sep 25, 2006 7:50 am

Quoting LTU932 (Reply 18):
A watercooled pure jet 707, not one with turbofans.

Ok, I don't want to go posting in the tech/ops forum, but how the devil does that work? Check out the exhaust... YIKES
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antskip
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RE: The Real Whisperjet?

Mon Sep 25, 2006 8:28 am

BOAC used to promote its big turboprop Bristol Britannias as the "Whispering Giant". BOAC advertised its rear-jet VC-10 as "triumphantly swift, silent, serene" http://www.vc10.net/History/boac_advertising.html.
 
Gr8Circle
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RE: The Real Whisperjet?

Mon Sep 25, 2006 8:42 am

Quoting LTU932 (Reply 18):
You're wrong. This was much louder:

^^A watercooled pure jet 707, not one with turbofans.

The loudest planes I ever heard were the VC-10 and the Caravelle......

The L-1011 was really very quite in its days...the daily GF L-1011 flight used to pass over my house on its way to approach r/way 27 at BOM and it used to make just a low whining sound that was quite pleasant to hear....unlike some of the other aircraft of that period... smile 
 
PanAm747
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RE: The Real Whisperjet?

Mon Sep 25, 2006 9:49 am

Quote:
Ok, I don't want to go posting in the tech/ops forum, but how the devil does that work? Check out the exhaust...

From "Boeing Jetliners" by Guy Norris & Mark Wagner:

"Despite achieving revolutionary speeds, the 707-100 series plane was essentially underpowered. Its Pratt & Whitney JT3C-6 Turbojets were incredibly noisy and dirty. They were rated at only 13,500 pounds of thrust each, and needed water injection for takeoff at high weights. This process involved the injection of distilled water into the compressor, which basically fooled the engine into believing it was sucking in more air than it actually was. This boosted power, but was environmentally disasterous and took up valuable weight that would have otherwise been used for payload or fuel".

"Early 707 models were nicknamed 'aqua-jets' and 'water-wagons' by their crews".


Quote:
Ok, I don't want to go posting in the tech/ops forum, but how the devil does that work? Check out the exhaust...A watercooled pure jet 707, not one with turbofans.

I agree - but I said AMONG the noisiest...

Wasn't their a thread about the loudest jetliners ever here a while back?
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AlexPorter
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RE: The Real Whisperjet?

Mon Sep 25, 2006 10:44 am

At the beginning of Easy Rider, the scene is right before a runway where planes are flying close overhead and landing, and they are very, very loud. I think I remember seeing 707s in that shot, but were any of them of the water-injected variety? If so, that's probably as close as you will get to hearing that type of 707, by watching that movie.
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kdeg00
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RE: The Real Whisperjet?

Mon Sep 25, 2006 1:23 pm

I have a very distinct memory of seeing my dad off at Logan airport as a kid and him getting onto a 737 with "Whisperjet" on the side. I'm pretty sure it was a Delta 737-200. This would have been about 1976-1977.