What is that whining sound aboard an inflight 747?

On Jan 15, 8:58 am, Jim Stewart wrote:

What's the difference between a jet engine
and Anthony?

You can shut a turbine down

george wrote:
On Jan 15, 8:58 am, Jim Stewart wrote:

What's the difference between a jet engine
and Anthony?

You can shut a turbine down

And it stops whining.

Robert M. Gary writes:

Do you have the seat schematics for different airlines?

They are easy to look up.

Mxsmanic wrote in
:

Robert M. Gary writes:

Do you have the seat schematics for different airlines?

They are easy to look up.


So what?


you still don't know anythign about how a 747 is put together.


Bertie

On 2008-01-14 11:58:30 -0800, Jim Stewart said:

Bertie the Bunyip wrote:
Mxsmanic wrote in
:

Alan writes:

Several times for the past few years, while on a transatlantic flight
aboard a KLM 747-400, I begin to hear what sounds like a turbine
spinning up, almost like an engine start, but higher pitch...
Anyone know what it might be?
At what point in the flight? And in which seat?


Why, you going to book next to him and whine the whole way?

What's the difference between a jet engine
and Anthony?

A jet engine actually produces useful energy?
--
Waddling Eagle
World Famous Flight Instructor

C J Campbell wrote:
On 2008-01-14 11:58:30 -0800, Jim Stewart said:

Bertie the Bunyip wrote:
Mxsmanic wrote in
:

Alan writes:

Several times for the past few years, while on a transatlantic flight
aboard a KLM 747-400, I begin to hear what sounds like a turbine
spinning up, almost like an engine start, but higher pitch...
Anyone know what it might be?
At what point in the flight? And in which seat?


Why, you going to book next to him and whine the whole way?

What's the difference between a jet engine
and Anthony?

A jet engine actually produces useful energy?

Well, that too. I was thinking of the flight attendant
punchline. Which is the whining doesn't stop when
it's shut down.

Alan wrote:
Several times for the past few years, while on a transatlantic flight
aboard a KLM 747-400, I begin to hear what sounds like a turbine
spinning up, almost like an engine start, but higher pitch...
Anyone know what it might be?

could be quite a few times. A wild guess on my part....the motors that
close the luggage doors often make a high pitch whine and that would be
before engine start. Those don't wind up/down and are pretty much on or
off.

Gerald

On Jan 14, 9:02 pm, C J Campbell
wrote:
On 2008-01-14 11:58:30 -0800, Jim Stewart said:



Bertie the Bunyip wrote:
Mxsmanic wrote in
m:

Alan writes:

Several times for the past few years, while on a transatlantic flight
aboard a KLM 747-400, I begin to hear what sounds like a turbine
spinning up, almost like an engine start, but higher pitch...
Anyone know what it might be?
At what point in the flight? And in which seat?

Why, you going to book next to him and whine the whole way?

What's the difference between a jet engine
and Anthony?

A jet engine actually produces useful energy?
--
Waddling Eagle
World Famous Flight Instructor

In the former case, the wake produced eventually dissipates?

Jon wrote in
:

On Jan 14, 9:02 pm, C J Campbell
wrote:
On 2008-01-14 11:58:30 -0800, Jim Stewart
said:



Bertie the Bunyip wrote:
Mxsmanic wrote in
m:

Alan writes:

Several times for the past few years, while on a transatlantic
flight aboard a KLM 747-400, I begin to hear what sounds like a
turbine spinning up, almost like an engine start, but higher
pitch... Anyone know what it might be?
At what point in the flight? And in which seat?

Why, you going to book next to him and whine the whole way?

What's the difference between a jet engine
and Anthony?

A jet engine actually produces useful energy?
--
Waddling Eagle
World Famous Flight Instructor

In the former case, the wake produced eventually dissipates?



Small point, It;s called blast. the stuff off the wing is wake.


Bertie

On Jan 15, 10:01 am, Bertie the Bunyip wrote:
Jon wrote :



On Jan 14, 9:02 pm, C J Campbell
wrote:
On 2008-01-14 11:58:30 -0800, Jim Stewart
said:

Bertie the Bunyip wrote:
Mxsmanic wrote in
m:

Alan writes:

Several times for the past few years, while on a transatlantic
flight aboard a KLM 747-400, I begin to hear what sounds like a
turbine spinning up, almost like an engine start, but higher
pitch... Anyone know what it might be?
At what point in the flight? And in which seat?

Why, you going to book next to him and whine the whole way?

What's the difference between a jet engine
and Anthony?

A jet engine actually produces useful energy?
--
Waddling Eagle
World Famous Flight Instructor

In the former case, the wake produced eventually dissipates?

Small point, It;s called blast. the stuff off the wing is wake.

Yep, my bad.....Jet Blast being the other type of turbulence caused
by... the engine, too Don't wanna be too close to either type I'd
gather, unless you like living dangerously :P



Bertie