O2 Mask On Pilot?

On Thu, 18 Aug 2005 18:50:06 GMT, "Steven P. McNicoll"
wrote:


"GeorgeB" wrote in message
.. .

What would have been the effect if the O2 bottle for the cockpit had
been inadvertently filled with breathing air rather than O2?


From what would the oxygen system be serviced in your scenario? A
compressor?

I've far more experience with industrial compressed gasses than with
aircraft oxygen, and see much more "compressed breathing air" than
BREATHING compressed O2. (Oxygen for oxyacetelyne is to different
standards, but I think it is just as good; several college buddies
would spend some time breathing it after having too much to drink the
night before. Ah, the REAL hangover cure.

Firefighters and scuba divers use it in large quantiies. Bottles are
common with gas suppliers. What I don't know is how the fittings
compare.

Nor do I know how a plane's bottles are filled; via compressor from
low pressure sources, high pressure via cascade bottles, or ???

I do know that the fittings need to be clean of oxydizable materials;
storoes of a little oil on gauge threads, if true, keep one careful.

"GeorgeB" wrote in

I've far more experience with industrial compressed gasses than with
aircraft oxygen, and see much more "compressed breathing air" than
BREATHING compressed O2. (Oxygen for oxyacetelyne is to different
standards, but I think it is just as good;

Correct. It's just as good now.

moo

"GeorgeB" wrote in message
...

I've far more experience with industrial compressed gasses than with
aircraft oxygen, and see much more "compressed breathing air" than
BREATHING compressed O2. (Oxygen for oxyacetelyne is to different
standards, but I think it is just as good; several college buddies
would spend some time breathing it after having too much to drink the
night before. Ah, the REAL hangover cure.

Firefighters and scuba divers use it in large quantiies. Bottles are
common with gas suppliers. What I don't know is how the fittings
compare.

Nor do I know how a plane's bottles are filled; via compressor from
low pressure sources, high pressure via cascade bottles, or ???

I do know that the fittings need to be clean of oxydizable materials;
storoes of a little oil on gauge threads, if true, keep one careful.


In a previous life I was in aircraft maintenance. Aviator's breathing
oxygen systems were serviced from just two sources; compressed oxygen
bottles or liquid oxygen carts. The only other compressed gas bottle used
for servicing aircraft was nitrogen. I don't recall what measures were
taken to prevent servicing oxygen systems with nitrogen, other than colors
and markings on the bottles, but servicing oxygen systems with nitrogen
would be a very bad thing.

servicing oxygen systems with nitrogen
would be a very bad thing.

What would it feel like to breathe nitrogen instead of oxygen or air? I
presume one would just get euphoric, pass out, and die, with nary a clue.

Jose
--
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except there's no God, and there's no dice. And maybe there's no universe.
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"Jose" wrote in message ...
servicing oxygen systems with nitrogen would be a very bad thing.

What would it feel like to breathe nitrogen instead of oxygen or air? I presume one would just get euphoric, pass
out, and die, with nary a clue.

Jose

Years ago we had a contract laborer working in a catalyst vessel with a nitrogen atmosphere. He lifted his breathing
air mask to spit. Bad move. Sucked in a breath and it was nearly his last. The man passed out and started
convulsing. The confined space attendant radioed for help from the ERT. Ever tried to pull a convulsing patient
from a manway? Even with a tripod / winch / cable / harness already rigged, it was quite a job. The man lived but
was hospitalized for quite awhile. A co-worker put on an airmask that inadvertently been connected to a nitrogen
header. This was back in the 60's. He took one breath and woke up in the hospital. Thankfully, he didn't have a
chance to fully strap the mask on.



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Jose opined

servicing oxygen systems with nitrogen
would be a very bad thing.

What would it feel like to breathe nitrogen instead of oxygen or air? I
presume one would just get euphoric, pass out, and die, with nary a clue.

Skip the euphoria, and you have your answer.


-ash
Cthulhu in 2005!
Why wait for nature?

What would it feel like to breathe nitrogen instead of oxygen or air? I
presume one would just get euphoric, pass out, and die, with nary a clue.


Skip the euphoria, and you have your answer.

Ok, then what causes the euphoria which is supposed to be part of
hypoxia, and why doesn't it apply here?

Jose
--
Quantum Mechanics is like this: God =does= play dice with the universe,
except there's no God, and there's no dice. And maybe there's no universe.
for Email, make the obvious change in the address.

Jose opined

What would it feel like to breathe nitrogen instead of oxygen or air? I
presume one would just get euphoric, pass out, and die, with nary a clue.


Skip the euphoria, and you have your answer.

Ok, then what causes the euphoria which is supposed to be part of
hypoxia, and why doesn't it apply here?

A pure N2 atmosphere has no O2. So unconsciousness occurs quickly, and
unexpectedly, leaving no time for euphoria.

It is not quit as fast as decompressioin, but fast with no warning. Scroll
down http://www.cfht.hawaii.edu/~warren/s...nicLiquids.htm for
example.


-ash
Cthulhu in 2005!
Why wait for nature?

"Jose" wrote in message
servicing oxygen systems with nitrogen would be a very bad thing.

What would it feel like to breathe nitrogen instead of oxygen or air? I
presume one would just get euphoric, pass out, and die, with nary a clue.

Yep. No buildup of CO2. Everything would feel just fine. Just a bit of
warning dizziness.

moo

"Steven P. McNicoll" wrote in message
In a previous life I was in aircraft maintenance. Aviator's breathing
oxygen systems were serviced from just two sources; compressed oxygen
bottles or liquid oxygen carts. The only other compressed gas bottle used
for servicing aircraft was nitrogen. I don't recall what measures were
taken to prevent servicing oxygen systems with nitrogen, other than colors
and markings on the bottles, but servicing oxygen systems with nitrogen
would be a very bad thing.
Different fittings.

moo