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Mizter T April 16th 10 01:08 PM

The quiet skies over London town
 
Rather nice, isn't it! Enjoy it whilst you can.

Basil Jet[_2_] April 16th 10 01:13 PM

The quiet skies over London town
 
On 16/04/2010 14:08, Mizter T wrote:
Rather nice, isn't it! Enjoy it whilst you can.


Good time to sell that Hounslow house.

Adrian April 16th 10 01:31 PM

The quiet skies over London town
 
Mizter T gurgled happily, sounding much like they
were saying:

Rather nice, isn't it! Enjoy it whilst you can.


If you don't like it, don't buy a house under the flight path. It's that
simple.

Yes, I'll cheerfully accept there might still be the odd resident who
hasn't moved since Heathrow opened. 64 years ago. (Did you know Heathrow
had six runways in the late '40s?)

Recliner[_2_] April 16th 10 01:42 PM

The quiet skies over London town
 
"Adrian" wrote in message

Mizter T gurgled happily, sounding much like they
were saying:

Rather nice, isn't it! Enjoy it whilst you can.


If you don't like it, don't buy a house under the flight path. It's
that simple.

Yes, I'll cheerfully accept there might still be the odd resident who
hasn't moved since Heathrow opened. 64 years ago. (Did you know
Heathrow had six runways in the late '40s?)


Yes, but never more than two in use at any one time, just like today
(well, OK, not today!). You can just about make out the outlines of the
four closed (and partly built-over) runways from modern aerial views.



Mizter T April 16th 10 01:47 PM

The quiet skies over London town
 

On Apr 16, 2:31*pm, Adrian wrote:

Mizter T gurgled happily, sounding much like they
were saying:

Rather nice, isn't it! Enjoy it whilst you can.


If you don't like it, don't buy a house under the flight path. It's that
simple.

Yes, I'll cheerfully accept there might still be the odd resident who
hasn't moved since Heathrow opened. 64 years ago. (Did you know Heathrow
had six runways in the late '40s?)


Angry man! Calm down dear.

Anyhow, large swathes of London are affected by aircraft noise,
including areas quite far away from Heathrow.

[email protected] April 16th 10 01:51 PM

The quiet skies over London town
 
On 16 Apr 2010 13:31:34 GMT
Adrian wrote:
Mizter T gurgled happily, sounding much like they
were saying:

Rather nice, isn't it! Enjoy it whilst you can.


If you don't like it, don't buy a house under the flight path. It's that
simple.


That would be most of london then.

B2003



Adrian April 16th 10 02:01 PM

The quiet skies over London town
 
Mizter T gurgled happily, sounding much like they
were saying:

Rather nice, isn't it! Enjoy it whilst you can.


If you don't like it, don't buy a house under the flight path. It's
that simple.

Yes, I'll cheerfully accept there might still be the odd resident who
hasn't moved since Heathrow opened. 64 years ago. (Did you know
Heathrow had six runways in the late '40s?)


Angry man! Calm down dear.


Not at all angry.

Anyhow, large swathes of London are affected by aircraft noise,
including areas quite far away from Heathrow.


Umm, yes, and?

PhilD April 16th 10 02:06 PM

The quiet skies over London town
 
On 16 Apr, 14:42, "Recliner" wrote:
You can just about make out the outlines of the
four closed (and partly built-over) runways from modern aerial views.


Out of interest, did they form a "star of David" pattern, or are they
now somewhat more subtle in terms of visible remains?

PhilD

--


Recliner[_2_] April 16th 10 02:20 PM

The quiet skies over London town
 
"PhilD" wrote in message

On 16 Apr, 14:42, "Recliner" wrote:
You can just about make out the outlines of the
four closed (and partly built-over) runways from modern aerial views.


Out of interest, did they form a "star of David" pattern, or are they
now somewhat more subtle in terms of visible remains?


Yes, three pairs of relatively short parallel runways, forming an
enclosed hexagonal central area (hence the the need for road tunnels).

Some parts of the closed runways are currently used as taxiways, but the
remote T3 pier is clearly built right on top of one of the old runways,
as is the new control tower. The two remaining 9/27 runways are now much
longer than they were originally.



Basil Jet[_2_] April 16th 10 02:30 PM

The quiet skies over London town
 
Changing the subject slightly, http://en.wikipedia.org/wiki/Runway says
"Runway designations change over time because the magnetic poles slowly
drift on the Earth's surface and the magnetic bearing will change. When
runway designations do change, especially at major airports, it is often
changed overnight as taxiway signs need to be changed and the huge
numbers at each end of the runway need to be repainted to the new runway
designators. In July 2009 for example, London Stansted Airport in the
United Kingdom changed its runway designations from 05/23 to 04/22
overnight."

Mizter T April 16th 10 02:31 PM

The quiet skies over London town
 

On Apr 16, 3:01*pm, Adrian wrote:

Mizter T gurgled happily, sounding much like they
were saying:

Rather nice, isn't it! Enjoy it whilst you can.


If you don't like it, don't buy a house under the flight path. It's
that simple.


Yes, I'll cheerfully accept there might still be the odd resident who
hasn't moved since Heathrow opened. 64 years ago. (Did you know
Heathrow had six runways in the late '40s?)

Angry man! Calm down dear.


Not at all angry.


Funny, you sounded like a spluttering self-righteous so and so to me.


Anyhow, large swathes of London are affected by aircraft noise,
including areas quite far away from Heathrow.


Umm, yes, and?


So don't live in London is basically what you're saying? Right.

Anyway, I can't quite connect your outburst to the two sentences of
observation in my original post.

Recliner[_2_] April 16th 10 02:34 PM

The quiet skies over London town
 
"Basil Jet" wrote in message

Changing the subject slightly, http://en.wikipedia.org/wiki/Runway
says "Runway designations change over time because the magnetic poles
slowly drift on the Earth's surface and the magnetic bearing will
change. When runway designations do change, especially at major
airports, it is often changed overnight as taxiway signs need to be
changed and the huge numbers at each end of the runway need to be
repainted to the new runway designators. In July 2009 for example,
London Stansted Airport in the United Kingdom changed its runway
designations from 05/23 to 04/22 overnight."


Yes, that happened at Heathrow many years ago. I think what is now 09
was 08 back then (or was it 10?).



Adrian April 16th 10 02:59 PM

The quiet skies over London town
 
Mizter T gurgled happily, sounding much like they
were saying:

Rather nice, isn't it! Enjoy it whilst you can.


If you don't like it, don't buy a house under the flight path. It's
that simple.


Yes, I'll cheerfully accept there might still be the odd resident
who hasn't moved since Heathrow opened. 64 years ago. (Did you know
Heathrow had six runways in the late '40s?)


Angry man! Calm down dear.


Not at all angry.


Funny, you sounded like a spluttering self-righteous so and so to me.


Not at all the intent.

If you wish to assign any tone of voice, then "tired of whinging fools"
is probably closest.

Anyhow, large swathes of London are affected by aircraft noise,
including areas quite far away from Heathrow.


Umm, yes, and?


So don't live in London is basically what you're saying? Right.


No, not at all.

Just don't moan about the things which are inherently London, and were
predictably so when you moved there. It's like buying a house looking
onto say the A1/A406 junction, then complaining about there being lots
of traffic noise. Or buying a house next to a village church then whinging
about the bell-ringing. Or buying a house on the lane between a dairy
farm's yard and grazing then whinging about cow**** on the road.

All of which people do. Regularly. It's certainly not a London thing.

Anyway, I can't quite connect your outburst to the two sentences of
observation in my original post.


Simple.

Only a fool would buy a house under the flightpath to one of Europe's
busiest airports then complain about aircraft noise. "Enjoy it whilst you
can" certainly sounds like a complaint to me.

Richard J.[_3_] April 16th 10 04:55 PM

The quiet skies over London town
 
Recliner wrote on 16 April 2010 15:34:33 ...
"Basil wrote in message

Changing the subject slightly, http://en.wikipedia.org/wiki/Runway
says "Runway designations change over time because the magnetic poles
slowly drift on the Earth's surface and the magnetic bearing will
change. When runway designations do change, especially at major
airports, it is often changed overnight as taxiway signs need to be
changed and the huge numbers at each end of the runway need to be
repainted to the new runway designators. In July 2009 for example,
London Stansted Airport in the United Kingdom changed its runway
designations from 05/23 to 04/22 overnight."


Yes, that happened at Heathrow many years ago. I think what is now 09
was 08 back then (or was it 10?).


Yes 09 and 27 were 08 and 28. The runways are currently 092º and 272º
magnetic.

--
Richard J.
(to email me, swap 'uk' and 'yon' in address)

Paul Terry[_2_] April 16th 10 05:44 PM

The quiet skies over London town
 
In message , Adrian
writes

If you don't like it, don't buy a house under the flight path. It's that
simple.


Since I know of nobody who actually enjoys aircraft noise, are you
suggesting that the 2 million people affected by noise from Heathrow
should be rehoused so that a quarter of London can be depopulated?

Yes, I'll cheerfully accept there might still be the odd resident who
hasn't moved since Heathrow opened. 64 years ago. (Did you know Heathrow
had six runways in the late '40s?)


The number of aircraft movements since then has increased many times,
particularly since the proliferation of freight flights during the
1980s. For many, the night quota system introduced in the 1990s was the
final straw - the last scheduled flight arrives at Heathrow at 11.30pm
and the busy early-morning period starts at 4.55am. Less than
five-and-a-half hours sleep is not enough, especially since the night
quota allows for a number of flights even during that precious period of
calm.

--
Paul Terry

Adrian April 16th 10 06:01 PM

The quiet skies over London town
 
Paul Terry gurgled happily, sounding much like
they were saying:

If you don't like it, don't buy a house under the flight path. It's that
simple.


Since I know of nobody who actually enjoys aircraft noise, are you
suggesting that the 2 million people affected by noise from Heathrow
should be rehoused so that a quarter of London can be depopulated?


Not at all. Those people voluntarily chose to live there since the
aircraft noise was a fact of life.

Why did they do that? Because the aircraft noise made _that_ house, in a
location of _that_ type, cheaper than it would have been if it wasn't for
the aircraft noise.

They bought the house cheaper, or a better house for the same money, than
if the aircraft noise was not there.

Now that they've forgotten about the benefit side of that particular cost/
benefit equation, they want to ignore the cost side, too. Tough. Life
don't work like that. You made your bed, now lie in it.

The number of aircraft movements since then has increased many times,
particularly since the proliferation of freight flights during the
1980s.


~25yrs ago.

For many, the night quota system introduced in the 1990s


~15yrs ago.

was the final straw - the last scheduled flight arrives at Heathrow at
11.30pm and the busy early-morning period starts at 4.55am. Less than
five-and-a-half hours sleep is not enough, especially since the night
quota allows for a number of flights even during that precious period of
calm.


I lived in the NW quadrant of the M4/M25 junction for several years since
that night quota introduction. I've since lived directly under the
flightpath of Luton airport, roughly a mile from the eastern end of the
runway - since that airport's proliferation of cheapies.

I've been there, done that.

Surprisingly, when I moved to each of those, I was well aware that it
wasn't actually a rural idyll. I found you tuned the planes out quickly.

For those who find they can't ignore them, and the resulting period of
sleep insufficient, I'd suggest they consider moving house - just like
those for whom changes 15-25yrs ago were "the final straw" presumably did.

Oh, look. They might have to pay a bit more to get an equal house. Just
like they would've done when they moved in.

Mizter T April 16th 10 06:13 PM

The quiet skies over London town
 

On Apr 16, 3:59*pm, Adrian wrote:
[stuff]


You've made a ****load of assumptions. I've got a lot on this weekend
but I'll be back to respond properly when I can.

Paul Terry[_2_] April 16th 10 06:30 PM

The quiet skies over London town
 
In message , Adrian
writes

Paul Terry gurgled happily, sounding much like
they were saying:

If you don't like it, don't buy a house under the flight path. It's that
simple.


Since I know of nobody who actually enjoys aircraft noise, are you
suggesting that the 2 million people affected by noise from Heathrow
should be rehoused so that a quarter of London can be depopulated?


Not at all. Those people voluntarily chose to live there since the
aircraft noise was a fact of life.


But the noise was considerably less back in the 1970s, when I bought my
house.

Why did they do that? Because the aircraft noise made _that_ house, in a
location of _that_ type, cheaper than it would have been if it wasn't for
the aircraft noise.


Bollox. Houses in Richmond are among the most expensive in the country.

Now that they've forgotten about the benefit side of that particular cost/
benefit equation, they want to ignore the cost side, too.


You've made the error of thinking that your equation is correct.

--
Paul Terry

Adrian April 16th 10 06:32 PM

The quiet skies over London town
 
Mizter T gurgled happily, sounding much like they
were saying:

[stuff]


You've made a ****load of assumptions. I've got a lot on this weekend
but I'll be back to respond properly when I can.


Please do.

I'm sure there must be somebody in the area who's had no opportunity at
all to move house since the end of WW2, and can still hear the planes.
Can I trust you'll introduce me to them? I'm sure they'd be a fascinating
person to chat to.

redcat April 16th 10 06:32 PM

The quiet skies over London town
 
Mizter T wrote:
Rather nice, isn't it! Enjoy it whilst you can.


It must be amazing :-) Just like olde tymes.

But -- I'm coming over in exactly 2 weeks, so please clean up that ash!!!

rc

redcat April 16th 10 06:32 PM

The quiet skies over London town
 
Basil Jet wrote:
On 16/04/2010 14:08, Mizter T wrote:
Rather nice, isn't it! Enjoy it whilst you can.


Good time to sell that Hounslow house.


Basil Jet, they're allowing you out and about?

redcat April 16th 10 06:33 PM

The quiet skies over London town
 
Adrian wrote:
Mizter T gurgled happily, sounding much like they
were saying:

Rather nice, isn't it! Enjoy it whilst you can.


If you don't like it, don't buy a house under the flight path. It's that
simple.

Yes, I'll cheerfully accept there might still be the odd resident who
hasn't moved since Heathrow opened. 64 years ago. (Did you know Heathrow
had six runways in the late '40s?)


But didn't that have to do with wind direction and the strength of
engines? it's not as if they were all in constant use.

redcat April 16th 10 06:44 PM

The quiet skies over London town
 
Adrian wrote:
Paul Terry gurgled happily, sounding much like
they were saying:

If you don't like it, don't buy a house under the flight path. It's that
simple.


Since I know of nobody who actually enjoys aircraft noise, are you
suggesting that the 2 million people affected by noise from Heathrow
should be rehoused so that a quarter of London can be depopulated?


Not at all. Those people voluntarily chose to live there since the
aircraft noise was a fact of life.

Why did they do that? Because the aircraft noise made _that_ house, in a
location of _that_ type, cheaper than it would have been if it wasn't for
the aircraft noise.

They bought the house cheaper, or a better house for the same money, than
if the aircraft noise was not there.

Now that they've forgotten about the benefit side of that particular cost/
benefit equation, they want to ignore the cost side, too. Tough. Life
don't work like that. You made your bed, now lie in it.

The number of aircraft movements since then has increased many times,
particularly since the proliferation of freight flights during the
1980s.


~25yrs ago.

For many, the night quota system introduced in the 1990s


~15yrs ago.

was the final straw - the last scheduled flight arrives at Heathrow at
11.30pm and the busy early-morning period starts at 4.55am. Less than
five-and-a-half hours sleep is not enough, especially since the night
quota allows for a number of flights even during that precious period of
calm.


I lived in the NW quadrant of the M4/M25 junction for several years since
that night quota introduction. I've since lived directly under the
flightpath of Luton airport, roughly a mile from the eastern end of the
runway - since that airport's proliferation of cheapies.

I've been there, done that.

Surprisingly, when I moved to each of those, I was well aware that it
wasn't actually a rural idyll. I found you tuned the planes out quickly.

For those who find they can't ignore them, and the resulting period of
sleep insufficient, I'd suggest they consider moving house - just like
those for whom changes 15-25yrs ago were "the final straw" presumably did.

Oh, look. They might have to pay a bit more to get an equal house. Just
like they would've done when they moved in.


I live in Manhattan over a busy Avenue. I get fire engines, ambulances,
police cars screaming into the night. I also get private garbage trucks
humping onto the pavement (they growl as they do this) at 1 and 4 a.m.
and then grinding down the trash propelled into them by banging cans.

I also get leaf blowers and snow blowers depending on the season; car
alarms and angry honking drivers. Then there are the news helicopters
every time there's an event like a parade up Fifth Avenue or a Marathon.
And the private tourist helicopters and the spluttering little hobby planes.

Punchline: I live in one of the most expensive neighborhoods in America.

Solution: Keep the windows shut, run the air conditioner for white noise.

What? I can't hear you.

:-)

rc

Adrian April 16th 10 06:48 PM

The quiet skies over London town
 
Paul Terry gurgled happily, sounding much like
they were saying:

Not at all. Those people voluntarily chose to live there since the
aircraft noise was a fact of life.


But the noise was considerably less back in the 1970s, when I bought my
house.


Did it come as a great surprise to you, back then, that aircraft
movements would increase?

Have you had no opportunity in the intervening 35 years to move?

Why did they do that? Because the aircraft noise made _that_ house, in a
location of _that_ type, cheaper than it would have been if it wasn't
for the aircraft noise.


Bollox. Houses in Richmond are among the most expensive in the country.


"among".

Compare Richmond prices with an equivalent area, with equivalent
transport links and proximity to central London, but without the aircraft
noise.

Or, let's put it another way, what d'you think would happen to Richmond
house prices if the aircraft noise stopped tomorrow?

[email protected] April 16th 10 09:11 PM

The quiet skies over London town
 
In article ,
(Adrian) wrote:

Only a fool would buy a house under the flightpath to one of
Europe's busiest airports then complain about aircraft noise.
"Enjoy it whilst you can" certainly sounds like a complaint to me.


My parents moved into their house in Putney in 1950. Heathrow wasn't an
important airport then. When I was a kid aircraft noise wasn't the problem
it became because there were very few jets.

--
Colin Rosenstiel

Michael R N Dolbear April 16th 10 10:57 PM

The quiet skies over London town
 
Mizter T wrote

Rather nice, isn't it! Enjoy it whilst you can.



Had a nice walk (Ripley/ Pyrford), could still hear the M25.

One light aircraft from Fairoaks too.



--
Mike D



Basil Jet[_2_] April 17th 10 02:54 AM

The quiet skies over London town
 
On 16/04/2010 19:32, redcat wrote:
Basil Jet wrote:
On 16/04/2010 14:08, Mizter T wrote:
Rather nice, isn't it! Enjoy it whilst you can.


Good time to sell that Hounslow house.


Basil Jet, they're allowing you out and about?


If anyone else had written that, I'd ponder its meaning.

Basil Jet[_2_] April 17th 10 02:56 AM

The quiet skies over London town
 
On 16/04/2010 17:55, Richard J. wrote:
Recliner wrote on 16 April 2010 15:34:33 ...
"Basil wrote in message

In July 2009 for example,
London Stansted Airport in the United Kingdom changed its runway
designations from 05/23 to 04/22 overnight."


Yes, that happened at Heathrow many years ago. I think what is now 09
was 08 back then (or was it 10?).


Yes 09 and 27 were 08 and 28.


Doh!


Paul Terry[_2_] April 17th 10 05:57 AM

The quiet skies over London town
 
In message , Adrian
writes

Paul Terry gurgled happily, sounding much like
they were saying:


But the noise was considerably less back in the 1970s, when I bought my
house.


Did it come as a great surprise to you, back then, that aircraft
movements would increase?


Yes. In fact, air travel was declining rapidly after the 1974 oil
crisis: BEA and BOAC had been forced to merge, many routes were
abandoned, and the Bermuda II agreement meant that many transatlantic
services had to use Gatwick rather than Heathrow.

It was not until the late 70s that cheap flights (often using larger,
noisier aircraft) began to have an impact, and passenger numbers started
to increase rapidly.

Have you had no opportunity in the intervening 35 years to move?


Why should I be forced out by the inconsiderate behaviour of others? Do
you normally penalize the victim?

Why did they do that? Because the aircraft noise made _that_ house, in a
location of _that_ type, cheaper than it would have been if it wasn't
for the aircraft noise.


Houses in Richmond are among the most expensive in the country.


"among".


Exactly. Your claim that house prices under the flight path are cheaper
is not born out by the facts, except in the immediate vicinity of the
airport.

--
Paul Terry

Roland Perry April 17th 10 06:47 AM

The quiet skies over London town
 
In message , at 06:57:18 on Sat,
17 Apr 2010, Paul Terry remarked:
It was not until the late 70s that cheap flights (often using larger,
noisier aircraft) began to have an impact, and passenger numbers
started to increase rapidly.


The only problem with that argument is that very few charter/low-cost
flights use Heathrow - it's almost entirely full service airlines.
--
Roland Perry

Adrian April 17th 10 07:32 AM

The quiet skies over London town
 
Paul Terry gurgled happily, sounding much like
they were saying:

Did it come as a great surprise to you, back then, that aircraft
movements would increase?


Yes.


gobsmacked

Why did they do that? Because the aircraft noise made _that_ house, in
a location of _that_ type, cheaper than it would have been if it
wasn't for the aircraft noise.


Houses in Richmond are among the most expensive in the country.


"among".


Exactly. Your claim that house prices under the flight path are cheaper
is not born out by the facts, except in the immediate vicinity of the
airport.


I notice you snipped the rest of that response. Shall we consider it
again?

Compare Richmond prices with an equivalent area, with equivalent
transport links and proximity to central London, but without the
aircraft noise.

Or, let's put it another way, what d'you think would happen to
Richmond house prices if the aircraft noise stopped tomorrow?


Paul Terry[_2_] April 17th 10 07:56 AM

The quiet skies over London town
 
In message , Roland Perry
writes

The only problem with that argument is that very few charter/low-cost
flights use Heathrow - it's almost entirely full service airlines.


True, but it was the advent of low cost flights (notably Skytrain) after
deregulation in the late 70s that caused the main carriers to bring down
prices and thus trigger an enormous expansion in flights.
--
Paul Terry

Paul Terry[_2_] April 17th 10 07:57 AM

The quiet skies over London town
 
In message , Adrian
writes

I notice you snipped the rest of that response. Shall we consider it
again?

Compare Richmond prices with an equivalent area, with equivalent
transport links and proximity to central London, but without the
aircraft noise.

Or, let's put it another way, what d'you think would happen to
Richmond house prices if the aircraft noise stopped tomorrow?


What on earth is the point of speculating on something that will never
happen? But do feel free to do so if you wish, and let us know what you
think would happen, and why.
--
Paul Terry

Richard J.[_3_] April 17th 10 09:28 AM

The quiet skies over London town
 
Richard J. wrote on 16 April 2010 17:55:28 ...
wrote on 16 April 2010 15:34:33 ...
"Basil wrote in message

Changing the subject slightly, http://en.wikipedia.org/wiki/Runway
says "Runway designations change over time because the magnetic poles
slowly drift on the Earth's surface and the magnetic bearing will
change. When runway designations do change, especially at major
airports, it is often changed overnight as taxiway signs need to be
changed and the huge numbers at each end of the runway need to be
repainted to the new runway designators. In July 2009 for example,
London Stansted Airport in the United Kingdom changed its runway
designations from 05/23 to 04/22 overnight."


Yes, that happened at Heathrow many years ago. I think what is now 09
was 08 back then (or was it 10?).


Yes 09 and 27 were 08 and 28. The runways are currently 092º and 272º
magnetic.


CORRECTION ('cos what I wrote above is rubbish: 08 and 28 are 200
degrees difference and it must be 180!)
The current 09 and 27 were originally 10 and 28.
--
Richard J.
(to email me, swap 'uk' and 'yon' in address)

Tom Anderson April 17th 10 01:03 PM

The quiet skies over London town
 
On Fri, 16 Apr 2010, Basil Jet wrote:

Changing the subject slightly, http://en.wikipedia.org/wiki/Runway says
"Runway designations change over time because the magnetic poles slowly
drift on the Earth's surface and the magnetic bearing will change. When
runway designations do change, especially at major airports, it is often
changed overnight as taxiway signs need to be changed and the huge
numbers at each end of the runway need to be repainted to the new runway
designators. In July 2009 for example, London Stansted Airport in the
United Kingdom changed its runway designations from 05/23 to 04/22
overnight."


I'm surprised that the bearings are magnetic rather than true (which would
never change, up to continental drift). Is the idea that the poor pilots
shouldn't have to deal with correcting their compasses in flight? What do
they do now they use (laser) gyrocompasses? Apply a magnetic decorrection
so they can work out where the runway points?

tom

--
Well parse this, you little markup asshole. -- The Parable of the
Languages

Richard J.[_3_] April 17th 10 03:32 PM

The quiet skies over London town
 
Tom Anderson wrote on 17 April 2010 14:03:46 ...
On Fri, 16 Apr 2010, Basil Jet wrote:

Changing the subject slightly, http://en.wikipedia.org/wiki/Runway says
"Runway designations change over time because the magnetic poles slowly
drift on the Earth's surface and the magnetic bearing will change. When
runway designations do change, especially at major airports, it is often
changed overnight as taxiway signs need to be changed and the huge
numbers at each end of the runway need to be repainted to the new runway
designators. In July 2009 for example, London Stansted Airport in the
United Kingdom changed its runway designations from 05/23 to 04/22
overnight."


I'm surprised that the bearings are magnetic rather than true (which would
never change, up to continental drift). Is the idea that the poor pilots
shouldn't have to deal with correcting their compasses in flight?


Poor pilots can only afford a magnetic compass.

What do they do now they use (laser) gyrocompasses? Apply a magnetic
decorrection so they can work out where the runway points?


According to http://en.wikipedia.org/wiki/Heading_indicator the
gyrocompass (heading indiactor) has to be reset several times an hour so
that it matches the magnetic compass, otherwise it will drift for
various reasons. In other words, it's the heading given by the magnetic
compass in straight and level flight that is the reference.
--
Richard J.
(to email me, swap 'uk' and 'yon' in address)

Jeremy Parker April 17th 10 04:18 PM

The quiet skies over London town
 

"Adrian" wrote

[snip]

Yes, I'll cheerfully accept there might still be the odd resident
who
hasn't moved since Heathrow opened. 64 years ago. (Did you know
Heathrow
had six runways in the late '40s?)


My first trip through Heathrow was 58 years ago. I would have used
the old North Terminal, I guess, although I checked in at the BEA
terminal, which I think was around Waterloo somewhere - they hadn't
built their Kensington terminal off Cromwell Road then

Jeremy Parker



Tom Anderson April 17th 10 06:19 PM

The quiet skies over London town
 
On Sat, 17 Apr 2010, Richard J. wrote:

Tom Anderson wrote on 17 April 2010 14:03:46 ...
On Fri, 16 Apr 2010, Basil Jet wrote:

Changing the subject slightly, http://en.wikipedia.org/wiki/Runway says
"Runway designations change over time because the magnetic poles slowly
drift on the Earth's surface and the magnetic bearing will change. When
runway designations do change, especially at major airports, it is often
changed overnight as taxiway signs need to be changed and the huge
numbers at each end of the runway need to be repainted to the new runway
designators. In July 2009 for example, London Stansted Airport in the
United Kingdom changed its runway designations from 05/23 to 04/22
overnight."


I'm surprised that the bearings are magnetic rather than true (which would
never change, up to continental drift). Is the idea that the poor pilots
shouldn't have to deal with correcting their compasses in flight?


Poor pilots can only afford a magnetic compass.

What do they do now they use (laser) gyrocompasses? Apply a magnetic
decorrection so they can work out where the runway points?


According to http://en.wikipedia.org/wiki/Heading_indicator the
gyrocompass (heading indiactor) has to be reset several times an hour so
that it matches the magnetic compass, otherwise it will drift for
various reasons. In other words, it's the heading given by the magnetic
compass in straight and level flight that is the reference.


That's for light aircraft. Commercial aircraft use laser gyros and so on.

Still, i suppose the point is that the system has to be set up so that
pilots with even the most spartan equipment can navigate safely, and that
means using magnetic bearings everywhere - apparently directional radio
beacons also use magnetic bearings.

Still, i'm surprised even light aircraft pilots have to correct their
indicators manually. 125 USD buys you this:

http://www.sparkfun.com/commerce/pro...oducts_id=9623

Which is a hobbyist component, but should cost no more for a real
manufacturer, which includes solid-state accelerometry, turn-rate sensing,
and magnetometry in all three dimensions, and a processor. That could do
magnetically-corrected heading indication without too much trouble. I
suppose doing it robustly and then getting it certified would cost quite a
bit more.

tom

--
solvilvitur ambulando. copy a diamond shape, recording angel. .. ..

David A Stocks[_3_] April 18th 10 10:28 AM

The quiet skies over London town
 
"Paul Terry" wrote in message
...
In message , Adrian
writes

If you don't like it, don't buy a house under the flight path. It's that
simple.


Since I know of nobody who actually enjoys aircraft noise

I'm sure there are people who actually enjoy it. I certainly went through a
phase where standing under the departure end of the runway at Gatwick was
considered a cool way to spend an afternoon. It just wouldn't have been the
same without the noise ...

are you suggesting that the 2 million people affected by noise from
Heathrow should be rehoused so that a quarter of London can be
depopulated?

I think he was suggesting the ones who didn't think they could stand it
shouldn't have moved there in the first place. When I lived near Gatwick
(see below) there were indeed times when I was 'affected' by aircraft noise.
Now I live in Hove, where I'm 'affected' by things like police sirens and
helicopters, late night revellers etc. If I found it intolerable I suppose I
would have to consider moving to a house in the rural middle of nowhere.
Trouble is that if everyone did that the rural middle of nowhere would get
awfully crowded - and it's a long way to the shops.

I know people who wouldn't even consider looking at a house if it was
anywhere near a railway line ("couldn't stand the noise") and yet were quite
happy with a house on a busy road. I know someone else who has the M20 and
HS1 at the bottom of his garden. No one is forcing him to live there, and he
definitely has the means to move to places that are both a *lot* quieter and
closer to his work in central London. He has been in this house for at least
15 years and shows no sign of moving. Just about anywhere in SE England has
its pros and cons. You choose what matters to you and pay your money
accordingly.

Yes, I'll cheerfully accept there might still be the odd resident who
hasn't moved since Heathrow opened. 64 years ago. (Did you know Heathrow
had six runways in the late '40s?)


The number of aircraft movements since then has increased many times

OTOH the aircraft are a lot quieter. I grew up in a house about 3 miles west
of Gatwick. In the 1970/80s you definitely knew about it when aircraft were
taking off in that direction. By the late 1990s when my parents moved away
the aircraft had gained a lot more height by the time they got to us and
they were a lot quieter anyway.

DAS


redcat April 18th 10 01:27 PM

The quiet skies over London town
 
Basil Jet wrote:
On 16/04/2010 19:32, redcat wrote:
Basil Jet wrote:
On 16/04/2010 14:08, Mizter T wrote:
Rather nice, isn't it! Enjoy it whilst you can.

Good time to sell that Hounslow house.


Basil Jet, they're allowing you out and about?


If anyone else had written that, I'd ponder its meaning.


But you understand me perfectly! How nice :-)

BTW -- my personal sun is gathering some clouds around it. This crazy
volcano stuff; am I going to be able to get to your fair city in 12
days? :-/

rc



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