volcanic dust

15 Apr 2010

Keeping my eyes open for it - it should be primeval. biggrin

:D:D:D:D:D:D
Shame about the dust about to drop onto our cars.
Wash it off promptly - it's corrosive.

15 Apr 2010

Quote by flower411
Don`t know if everybodies had the wonderful clear blue skies today but it was fascinating to look up and see no aircraft and no vapour trails across the sky!!
They say there might be a spectacular sunset tonight ....anybody else watching ??

Maybe we could watch the sun set together? wink

Pink hats, back to back, feeding one another chocolate covered cherries.... but yeah, back to reality and good observation, I knew there was something missing and the lack of planes and vapour trails has been lovely today, lovely clear blue skies. Although I know you guys down south get far more of it than we do up here. Heathrow & Gatwick are SO busy.
My black car is already really dusty though so thanks for the tip foxylady :thumbup:

15 Apr 2010

Quote by varca
Fascinating stuff, never realised that dust and particles from an eruption could have such an impact on a planes engine and landing gear! Or that the dust from a volcano can block out the sun as it did in 1816!!

Didn't a similar thing cause the ice age ?
The sun being blocked out by fallout from a mahoosive meteor or something ?
In edit...
Someone pls tell Iceland it is CASH they owe us a and not ash....

15 Apr 2010

I think this is the result of two separate things.
1) the fact that the eruption started under ice and pressure built up to make it more explosive which forced the ash much higher until it reached the higher levels of the atmosphere that blow fast and keep the ash up. Combined with
2) the current weather pattern of winds coming down from the North and dragging the ash with them.
I seem to recall that the mini-ice-age of the 1300's was caused by a major eruption. Nogt sure about the chill in the 1800's. We certainly had a few extra-cold winters/summers then. Didn't that also have something to do with the potao famine in Ireland? Cool damp summers making the blight fungus thrive. dunno

15 Apr 2010

Quote by varca
I think this is the result of two separate things.
1) the fact that the eruption started under ice and pressure built up to make it more explosive which forced the ash much higher until it reached the higher levels of the atmosphere that blow fast and keep the ash up. Combined with
2) the current weather pattern of winds coming down from the North and dragging the ash with them.
I seem to recall that the mini-ice-age of the 1300's was caused by a major eruption. Nogt sure about the chill in the 1800's. We certainly had a few extra-cold winters/summers then. Didn't that also have something to do with the potao famine in Ireland? Cool damp summers making the blight fungus thrive.

The 1800's chill was following Kracatoa
'Global climate
In the year following the eruption, average global temperatures fell by as much as 1.2 °C (2.2 °F). Weather patterns continued to be chaotic for years, and temperatures did not return to normal until 1888. The eruption injected an unusually large amount of sulfur dioxide (SO2) gas high into the stratosphere which was subsequently transported by high-level winds all over the planet. This led to a global increase in sulfurous acid (H2SO3) concentration in high-level cirrus clouds. The resulting increase in cloud reflectivity (or albedo) would reflect more incoming light from the sun than usual, and cool the entire planet until the suspended sulfur fell to the ground as acid precipitation.'
Well that's Global Warming sorted. biggrin

:D:D:D:D:D

15 Apr 2010

Quote by Steve

Fascinating stuff, never realised that dust and particles from an eruption could have such an impact on a planes engine and landing gear! Or that the dust from a volcano can block out the sun as it did in 1816!!

Didn't a similar thing cause the ice age ?
The sun being blocked out by fallout from a mahoosive meteor or something ?
In edit...
Someone pls tell Iceland it is CASH they owe us and not ash....
Fooking brilliant :laughabove::laughabove:

:rotflmao:

15 Apr 2010

Quote by varca
Well, I wouldn`t say it was a spectacular sunset ....just some interesting whirls and swirls !!!
But it has to be the first time I`ve seen any sort of sunset from my kitchen window without vapour trails !!
Wonder if sunrise is gonna be worth a look.

I was ummm busy posting so missed it! :doh:
Going to take a peek at the sunrise on the morrow though biggrin

You may be too late, the airspace seems to have been opened again, but not to commercial aircraft.

15 Apr 2010

Quote by varca
Kracatoa is WEST of Java

Depends which way your facing I suppose :lol2:

15 Apr 2010

has been cloudy and a bit overcast all day so no nice sunset here tonite sad

15 Apr 2010

Has Bjork been smoking again?
lp

15 Apr 2010

Quote by Steve

Kracatoa is WEST of Java

Depends which way your facing I suppose :lol2:
Sorry west is always west.

15 Apr 2010

Quote by flower411

Kracatoa is WEST of Java

Depends which way your facing I suppose :lol2:
Sorry west is always west.
Only if you`re East of it !!!
Apart from the two poles we are always east and west of something.
Oh all those things that have gone west?

15 Apr 2010

OK.. Very pretty sunset and enjoyed it in good company (friends to the beach for an impromptu barbecue) NORMALLY would be happy that planes are grounded (living within spitting distance of 2 runways)
HOWEVER! Having put myself on the shelf for the past 10 months, I have finally arranged a meet for tomorrow night! Dog in kennels just in case Im very late back.. Kids at dad's .. New undies...plucked, shaved AND waxed...
Anticipation building up all week......
He is relying on a flight tomorrow morning to get home from work!!!! No Flight = No Him = No Meet!!!!!! B#@$% Volcanoes!!! :upset:

15 Apr 2010

Saw some beautiful photos on Flickr of tonight's sunset... smile

15 Apr 2010

Quote by varca
OK.. Very pretty sunset and enjoyed it in good company (friends to the beach for an impromptu barbecue) NORMALLY would be happy that planes are grounded (living within spitting distance of 2 runways)
HOWEVER! Having put myself on the shelf for the past 10 months, I have finally arranged a meet for tomorrow night! Dog in kennels just in case Im very late back.. Kids at dad's .. New undies...plucked, shaved AND waxed...
Anticipation building up all week......
He is relying on a flight tomorrow morning to get home from work!!!! No Flight = No Him = No Meet!!!!!! B#@$% Volcanoes!!! :upset:

Noooo!!! :therethere:
Maybe if you talk nicely to Admin you could commandeer the SH Private Jet SHAGFORCE 1 biggrin

As it wouldn't be a commercial flight and could fly under 20000ft you would be sorted :thumbup:
St3v3 what are you doing in the morning? :D
Awww keeping fingers crossed that all works out hon kiss

Thank you Varca...Good advice...think I'v been on that shelf for far too long so not seeing the swinging for the sunset. :doh:
In days of old I'd just kick back, enjoy the sunset.....perhaps pop into my local club for a couple :twisted: ... and hitch that ride on Shagforce1.. hump

15 Apr 2010

Just read an interesting article about why they grounded all the planes. Apparently back in '82 a 747 flew through a cloud of ash and they lost all 4 engines at once javascript: add_code(':eeek:'); . The pilot announced that they had a little problem FFS how cool was he , The plane dropped 25000ft before they managed to get them started again.
It must have been a nightmare for the cleaners lol
Full story here

15 Apr 2010

next it will be Network Rail:
"wrong kind of dust on the line"
lp

16 Apr 2010

My son arrived home for a visit yesterday and it seemed his was one of the last flights before they stopped them biggrin

16 Apr 2010

Quote by motorcyclerob
Just read an interesting article about why they grounded all the planes. Apparently back in '82 a 747 flew through a cloud of ash and they lost all 4 engines at once javascript: add_code(':eeek:'); . The pilot announced that they had a little problem FFS how cool was he , The plane dropped 25000ft before they managed to get them started again.
It must have been a nightmare for the cleaners lol
Full story here

I really hope that this is not the reason that all aircraft have been grounded and airports closed. This aircraft flew through the plume of a nearby erupting volcano. We are talking about a thin layer of ash residue at about 20,000 feet and dispersing all the time.
I am not sure that this is the real reason, maybe ash blocking vents and affecting airspeed and altitude indicators and an added risk of engine damage. It would be the aircraft operators who would make the decision if it was about engine damage. The fact that it has come from NATS makes me suspect that it is a navigation risk (ie dust/ash affecting altitude and speed).

16 Apr 2010

Quote by Too Hot
Just read an interesting article about why they grounded all the planes. Apparently back in '82 a 747 flew through a cloud of ash and they lost all 4 engines at once javascript: add_code(':eeek:'); . The pilot announced that they had a little problem FFS how cool was he , The plane dropped 25000ft before they managed to get them started again.
It must have been a nightmare for the cleaners lol
Full story here

I really hope that this is not the reason that all aircraft have been grounded and airports closed. This aircraft flew through the plume of a nearby erupting volcano. We are talking about a thin layer of ash residue at about 20,000 feet and dispersing all the time.
I am not sure that this is the real reason, maybe ash blocking vents and affecting airspeed and altitude indicators and an added risk of engine damage. It would be the aircraft operators who would make the decision if it was about engine damage. The fact that it has come from NATS makes me suspect that it is a navigation risk (ie dust/ash affecting altitude and speed).
That particular plane lost all four engines at once how they got them started again is a miracle which is what the inspectors said when they examined the damage afterwards. The reason why they're grounding the planes is because the ash destroys the Jet engines themselves. But here it is from the Beeb again

16 Apr 2010

Quote by motorcyclerob
Just read an interesting article about why they grounded all the planes. Apparently back in '82 a 747 flew through a cloud of ash and they lost all 4 engines at once javascript: add_code(':eeek:'); . The pilot announced that they had a little problem FFS how cool was he , The plane dropped 25000ft before they managed to get them started again.
It must have been a nightmare for the cleaners lol
Full story here

I really hope that this is not the reason that all aircraft have been grounded and airports closed. This aircraft flew through the plume of a nearby erupting volcano. We are talking about a thin layer of ash residue at about 20,000 feet and dispersing all the time.
I am not sure that this is the real reason, maybe ash blocking vents and affecting airspeed and altitude indicators and an added risk of engine damage. It would be the aircraft operators who would make the decision if it was about engine damage. The fact that it has come from NATS makes me suspect that it is a navigation risk (ie dust/ash affecting altitude and speed).
That particular plane lost all four engines at once how they got them started again is a miracle which is what the inspectors said when they examined the damage afterwards. The reason why they're grounding the planes is because the ash destroys the Jet engines themselves. But here it is from the Beeb again
A guest on the news this morning was Rymer, a vulcanologist. She said that the ash can turn into lava again in the engine because of the heat and that was the reason the aeroplanes were grounded.

16 Apr 2010

It's not that the ash will fill the engine. It would take a huge amount. It's that the ash gets into the flow of cooling air and blocks the tiny passages that air has to go through.
Cooler air is taken from the front section of the engine, taken through to the rear of the engine (after the combustion chamber) and fed through the blades that are sitting in incredibly hot air from the combustor. The blades have tiny holes in their surface allowing the cooler air to flow out and over the surface of the blade and acting as a protective barrier against the heat.
This is necessary cos the hot air is hotter than the melting temperature of the blades.
The ash gets into this flow, melts as it reaches the surface of the blade and welds itself around the hole, onto the blade and such like. Once the holes are blocked, no more cooling. Then it isn't very long at all (we are talking tens of minutes in the worst case) before the blades start to disintegrate. This is bad news for the rest of the engine cos the lumps of metal destroy it as they go flying through.
This is a picture of a turbine blade with its internal cooling passages.

The turbine is on the right in both engine images. Enjoy. biggrin

:D:D

16 Apr 2010

The first principle in aviation is this...
It is far better to be down here wishing you were up there, than to be up there wishing you were down here.

16 Apr 2010

Quote by Too Hot
. It would be the aircraft operators who would make the decision if it was about engine damage. The fact that it has come from NATS makes me suspect that it is a navigation risk (ie dust/ash affecting altitude and speed).

NATS is responsible for all aircraft movements in the UK, and part of that responsibility is to ensure that all flights take off and land safely. The airlines can stamp and scream as much as they like, but NATS has final say in this matter, and they have decided that there has been no flying (with a few exceptions)
There are ways round this for some aircraft, and that is to use something called VFR,which is Visual Flight Rules, which basically means they can fly at medium altitude, using landmarks and visual sightings to guide them.
The other method is IFR, which is Instrument Flight Rules, which basically means they are using the aircrafts flight panel to guide them, but as an airliner tends to cruise at 35,000 feet, and the warning notices cover 20-50,000 feet, it is decided that commercial flights will not be carried out.
This is one occasion when safety is paramount and should not be criticised.

17 Apr 2010

Quote by Kaznkev
Saw some beautiful photos on Flickr of tonight's sunset...

flikr has pictures of sunsets?omg i thought it just had homemade porn :giggle:
I believe you meant to say 'high quality home made porn of really interesting women and their jewellery'....

17 Apr 2010

Quote by varca
My son arrived home for a visit yesterday and it seemed his was one of the last flights before they stopped them

That was lucky hon! :D They are now saying that this could last into the weekend!
Very lucky! Seems his was the last flight out of Stockholm and the last to land at Stansted :D

17 Apr 2010

Quote by Sassy-Seren
My son arrived home for a visit yesterday and it seemed his was one of the last flights before they stopped them

That was lucky hon! :D They are now saying that this could last into the weekend!
Very lucky! Seems his was the last flight out of Stockholm and the last to land at Stansted :D
Happy for you! kiss

17 Apr 2010

A lot of people saying how nice/weird it is to have no con-trails and no sound of aircraft.
We live under one of the main routes in/out of East Midlands. But normally the planes are high enough by the time they get to us not to be an actual distraction. I live near a fairly busy road - lorries et al. But in between them it is more quiet than usual - if you can ignore the bloomin' birds. Absence of con-trails is a bit of a non-news item though. You don't always get them anyway.

17 Apr 2010

Quote by __random_orbit__
VThe skies here are sooo quiet!
lp

I put that in the wrong thread didn't I?...
hang on a minute...
lp
... that's better.
lp
I could have put it here too.
I wonder how many other threads this may have an appropriate place in?
lp

17 Apr 2010

wasn't spectacular from southampton. I am p***** off cos I WAS going to Greece nxt wk. Not much chance now.