Discussion:
For fun
(too old to reply)
Tony
2020-03-01 04:45:35 UTC
Permalink
https://www.stuff.co.nz/national/health/119861726/coronavirus-brian-tamaki-blames-satanic-airborne-demons-drinking-of-bats-blood
And there are those that will believe this preacher for money.
George
2020-03-01 19:15:57 UTC
Permalink
On Sat, 29 Feb 2020 22:45:35 -0600
Post by Tony
https://www.stuff.co.nz/national/health/119861726/coronavirus-brian-tamaki-blames-satanic-airborne-demons-drinking-of-bats-blood
And there are those that will believe this preacher for money.
:)
In fact the claims about getting it on airliners is sadly a lie.

The air in the cabin isn’t sealed in. Fresh air is continuously
introduced during the flight. A plane’s jets are already sucking in and
compressing huge volumes of air to burn with the aviation fuel. Some of
this is diverted for the passengers to breathe. Because the compression
heats up the air, it must first be ducted around the wings to be cooled
down. ‬ and then mixed 50:50 with the fresh air from outside. The
excess cabin air is vented through valves to the rear of the plane to
keep the cabin pressure constant.

This system means that the air in the plane’s cabin is completely
replaced around 15 times an hour, but this is mainly about controlling
the temperature and removing contaminants. The oxygen that all the
passengers breathe is less than one per cent of the fresh oxygen
entering the cabin.

The air is filtered AFTER for nasties. I
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James Christophers
2020-03-01 20:31:34 UTC
Permalink
Post by George
On Sat, 29 Feb 2020 22:45:35 -0600
Post by Tony
https://www.stuff.co.nz/national/health/119861726/coronavirus-brian-tamaki-blames-satanic-airborne-demons-drinking-of-bats-blood
And there are those that will believe this preacher for money.
:)
In fact the claims about getting it on airliners is sadly a lie.
The air in the cabin isn’t sealed in. Fresh air is continuously
introduced during the flight. A plane’s jets are already sucking in and
compressing huge volumes of air to burn with the aviation fuel. Some of
this is diverted for the passengers to breathe. Because the compression
heats up the air, it must first be ducted around the wings to be cooled
down. ‬ and then mixed 50:50 with the fresh air from outside. The
excess cabin air is vented through valves to the rear of the plane to
keep the cabin pressure constant.
This system means that the air in the plane’s cabin is completely
replaced around 15 times an hour, but this is mainly about controlling
the temperature and removing contaminants. The oxygen that all the
passengers breathe is less than one per cent of the fresh oxygen
entering the cabin.
I'm intrigued, George. So there's no re-circulation of "used" cabin air but a complete air renewal/replacement every four minutes on average? Or is this too simplistic an assumption?
Post by George
The air is filtered AFTER for nasties.
To protect or prevent who or what...or maybe to comply with some blanket regulation or other?
John Bowes
2020-03-01 21:00:10 UTC
Permalink
Post by James Christophers
Post by George
On Sat, 29 Feb 2020 22:45:35 -0600
Post by Tony
https://www.stuff.co.nz/national/health/119861726/coronavirus-brian-tamaki-blames-satanic-airborne-demons-drinking-of-bats-blood
And there are those that will believe this preacher for money.
:)
In fact the claims about getting it on airliners is sadly a lie.
The air in the cabin isn’t sealed in. Fresh air is continuously
introduced during the flight. A plane’s jets are already sucking in and
compressing huge volumes of air to burn with the aviation fuel. Some of
this is diverted for the passengers to breathe. Because the compression
heats up the air, it must first be ducted around the wings to be cooled
down. ‬ and then mixed 50:50 with the fresh air from outside. The
excess cabin air is vented through valves to the rear of the plane to
keep the cabin pressure constant.
This system means that the air in the plane’s cabin is completely
replaced around 15 times an hour, but this is mainly about controlling
the temperature and removing contaminants. The oxygen that all the
passengers breathe is less than one per cent of the fresh oxygen
entering the cabin.
I'm intrigued, George. So there's no re-circulation of "used" cabin air but a complete air renewal/replacement every four minutes on average? Or is this too simplistic an assumption?
As usual you'v taken a simplistic approach and failed to read Georges post. So much for a superior education Keith you can't even understand what 50:50 means :)
Post by James Christophers
Post by George
The air is filtered AFTER for nasties.
To protect or prevent who or what...or maybe to comply with some blanket regulation or other?
James Christophers
2020-03-01 21:18:47 UTC
Permalink
Post by John Bowes
Post by James Christophers
Post by George
On Sat, 29 Feb 2020 22:45:35 -0600
Post by Tony
https://www.stuff.co.nz/national/health/119861726/coronavirus-brian-tamaki-blames-satanic-airborne-demons-drinking-of-bats-blood
And there are those that will believe this preacher for money.
:)
In fact the claims about getting it on airliners is sadly a lie.
The air in the cabin isn’t sealed in. Fresh air is continuously
introduced during the flight. A plane’s jets are already sucking in and
compressing huge volumes of air to burn with the aviation fuel. Some of
this is diverted for the passengers to breathe. Because the compression
heats up the air, it must first be ducted around the wings to be cooled
down. ‬ and then mixed 50:50 with the fresh air from outside. The
excess cabin air is vented through valves to the rear of the plane to
keep the cabin pressure constant.
This system means that the air in the plane’s cabin is completely
replaced around 15 times an hour, but this is mainly about controlling
the temperature and removing contaminants. The oxygen that all the
passengers breathe is less than one per cent of the fresh oxygen
entering the cabin.
I'm intrigued, George. So there's no re-circulation of "used" cabin air but a complete air renewal/replacement every four minutes on average? Or is this too simplistic an assumption?
As usual you'v taken a simplistic approach and failed to read Georges post. So much for a superior education Keith you can't even understand what 50:50 means :)
I was certainly wrong to say there was no stale/fresh recirculation per se, but to quote George, verbatim: "...the air in the plane’s cabin is **completely
replaced** (my emphasis) around 15 times an hour," this implying total renewal approximately every 4 minutes, and this is what intrigues me.

As to whether the ventilation process prevents potential droplet infection between near-neighbour passengers is, I'd have thought, very much open to question
Post by John Bowes
Post by James Christophers
Post by George
The air is filtered AFTER for nasties.
To protect or prevent who or what...or maybe to comply with some blanket regulation or other?
George
2020-03-01 21:55:52 UTC
Permalink
On Sun, 1 Mar 2020 13:00:10 -0800 (PST)
Post by John Bowes
As usual you'v taken a simplistic approach and failed to read Georges
post. So much for a superior education Keith you can't even
understand what 50:50 means :)
Don't be to hard its a really tricky technical subject and those
trying to make it appear simple have an agenda.
Thanks :)
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George
2020-03-01 22:09:43 UTC
Permalink
On Mon, 2 Mar 2020 10:55:52 +1300
Post by George
On Sun, 1 Mar 2020 13:00:10 -0800 (PST)
Post by John Bowes
As usual you'v taken a simplistic approach and failed to read
Georges post. So much for a superior education Keith you can't even
understand what 50:50 means :)
Don't be to hard its a really tricky technical subject and those
trying to make it appear simple have an agenda.
Thanks :)
https://aerosavvy.com/aircraft-pressurization/
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George
2020-03-01 21:52:37 UTC
Permalink
On Sun, 1 Mar 2020 12:31:34 -0800 (PST)
Post by James Christophers
Post by George
On Sat, 29 Feb 2020 22:45:35 -0600
Post by Tony
https://www.stuff.co.nz/national/health/119861726/coronavirus-brian-tamaki-blames-satanic-airborne-demons-drinking-of-bats-blood
And there are those that will believe this preacher for money.
:)
In fact the claims about getting it on airliners is sadly a lie.
The air in the cabin isn’t sealed in. Fresh air is continuously
introduced during the flight. A plane’s jets are already sucking in
and compressing huge volumes of air to burn with the aviation fuel.
Some of this is diverted for the passengers to breathe. Because the
compression heats up the air, it must first be ducted around the
wings to be cooled down. ‬ and then mixed 50:50 with the fresh air
from outside. The excess cabin air is vented through valves to the
rear of the plane to keep the cabin pressure constant.
This system means that the air in the plane’s cabin is completely
replaced around 15 times an hour, but this is mainly about
controlling the temperature and removing contaminants. The oxygen
that all the passengers breathe is less than one per cent of the
fresh oxygen entering the cabin.
I'm intrigued, George. So there's no re-circulation of "used" cabin
air but a complete air renewal/replacement every four minutes on
average? Or is this too simplistic an assumption?
That's more or less what happens.
So those pesky little viruses get
blown about the entire cabin as its claimed they dont go far
Post by James Christophers
Post by George
The air is filtered AFTER for nasties.
To protect or prevent who or what...or maybe to comply with some
blanket regulation or other?
No. Its filtered coming in (prevents moondust) and goes through a
system on exit.
Long time since I was interested
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