Ash clouds threaten air traffic
Joined: Mar 2010
Posts: 67
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From: Sweden
Ash spreading measured by IR on satellites
The following is taken from "Teknisk Ukeblad" which is a jounal published by the Norwegian polytechnic society in Oslo.
"Satellite Images
The ashes that spread from the volcanic eruption is powdered stone that comes in and blocks the ventilation of the engine, but the plane's radar can not detect it. At NILU, with the researcher Fred Prata at the helm, has been developed a set of algorithms that convert data from U.S. satellites which could be useful for the aviation industry.
Prata uses publicly available images taken with an infrared camera by NASA satellites, then runs it through his proprietary modeling program. There are calculated the total ash quantity, concentration and size of particles in the discharge.
- Fred has several patents on this, and we have also taken this technology a step further and use it against other commercial applications, including to measure emissions from ships, "he said."
Apparently a special version of the IR camera and its software is being developed for use as a warning device on commercial aircraft. - similar to weather radar.
Finally for those of you who do not believe, there is a rather large amount of data available about single or double engine shutdown incidents at high altitude. Most of this is assumed be due to ice particles, but some may also on ash or mixed ice/ash particles.
"Satellite Images
The ashes that spread from the volcanic eruption is powdered stone that comes in and blocks the ventilation of the engine, but the plane's radar can not detect it. At NILU, with the researcher Fred Prata at the helm, has been developed a set of algorithms that convert data from U.S. satellites which could be useful for the aviation industry.
Prata uses publicly available images taken with an infrared camera by NASA satellites, then runs it through his proprietary modeling program. There are calculated the total ash quantity, concentration and size of particles in the discharge.
- Fred has several patents on this, and we have also taken this technology a step further and use it against other commercial applications, including to measure emissions from ships, "he said."
Apparently a special version of the IR camera and its software is being developed for use as a warning device on commercial aircraft. - similar to weather radar.
Finally for those of you who do not believe, there is a rather large amount of data available about single or double engine shutdown incidents at high altitude. Most of this is assumed be due to ice particles, but some may also on ash or mixed ice/ash particles.
Joined: Feb 2008
Posts: 182
Likes: 0
From: italy
last week I saw Volcanic Ash in clouds, over the English Channel and down in Spain, north of Madrid. The clouds are dirty looking, but very thin, maybe 100-200 feet in depth. Like smoke from a fire on a still day.
This is the biggest scam ever and I hope it gets sorted using technology, before an airline folds up under the financial pressure.
This is the biggest scam ever and I hope it gets sorted using technology, before an airline folds up under the financial pressure.
Sims Fly Virtually
Joined: Jun 2001
Posts: 704
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From: Used to be 3rd Sand Dune from the Left - But now I'm somewhere else somewhere else.
Thanks Dave, so our latest "ETD" of 03:30 could be realiastic, rather than hopeful!
Last edited by ExSimGuy; 16th May 2010 at 23:29. Reason: (faulty "c" key)
Joined: Mar 2002
Posts: 4,569
Likes: 1
From: Florida
Diversification
Where does this extrapolation fit into the discussion subject
It's already known what ice crystals can do on their own and where they are likely to be encountered so as to avoid.
Likewise it's already known what certain types of encounters with VA can do and how best to avoid and/or cope with it.
The two are not the same as far as the engine is concerned nor have they ever been linked together.
Finally for those of you who do not believe, there is a rather large amount of data available about single or double engine shutdown incidents at high altitude. Most of this is assumed be due to ice particles, but some may also on ash or mixed ice/ash particles.
It's already known what ice crystals can do on their own and where they are likely to be encountered so as to avoid.
Likewise it's already known what certain types of encounters with VA can do and how best to avoid and/or cope with it.
The two are not the same as far as the engine is concerned nor have they ever been linked together.
Joined: May 2002
Posts: 573
Likes: 44
From: Near Gatwick
LGW Atis( 5 mins ago) is saying departures only from 06.00 on 08R--wondered why it was so quiet!
Hopefully ash will disappear soon!
0727
Still the same here (as apparently ash cloud is to the west of the airport) all Spanish etc deps will be going out off 8R on a DOVER/Clacton dep
Ist departure is imminent
Hopefully ash will disappear soon!
0727
Still the same here (as apparently ash cloud is to the west of the airport) all Spanish etc deps will be going out off 8R on a DOVER/Clacton dep
Ist departure is imminent
Last edited by Charley B; 17th May 2010 at 06:28.
Joined: Jun 2001
Posts: 5,896
Likes: 1
From: Rockytop, Tennessee, USA
LGW Atis is saying departures only from 06.00 on 08R here (that was 5 mins ago)--wondered why it was so quiet!
Hopefully ash will disappear soon!
Hopefully ash will disappear soon!
Joined: Jun 2008
Posts: 98
Likes: 0
From: UK
One factor in your favour - apparently still 'scheduled'
But two potentially against:
- The southern edge of a Black ash area is predicted to move Eastwards, VERY close to LGW between now and 1200.
- There are no arrivals into LGW at the moment, so if the aircraft in question is not already there, the Boss ain't moving, until 1800 at earliest.
But two potentially against:
- The southern edge of a Black ash area is predicted to move Eastwards, VERY close to LGW between now and 1200.
- There are no arrivals into LGW at the moment, so if the aircraft in question is not already there, the Boss ain't moving, until 1800 at earliest.
Joined: May 2004
Posts: 133
Likes: 0
From: UK
So far I've not found any evidence of ash damage in all the aircraft I've inspected (northern european regional routes). I've asked a lot of my colleagues in other airlines if they've found any evidence of ash damage or if they've heard of it being found :- Nothing. Not one engineer I've contacted has found or known of anyone finding damage. Now I don't claim to know every engineer in Europe, but it does seem that ash damage is thin on the ground (or the blades). I think that any maintenence cost saving from not flying is going to be dwarfed by the loss of revenue.
Joined: Jan 2003
Posts: 164
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From: Alloway
Question For The Men Up Front
I know this is a pilots forums but being a retired engineer after looking after you lot for 40 some years I feel I can ask a question on this forum.
Why is Ryanair always first to cancel so many flights out of Prestwick and other airports?
Take care out there, Peter
Why is Ryanair always first to cancel so many flights out of Prestwick and other airports?
Take care out there,
Peter
Predictions
