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Why nitrogen?



 
 
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  #1  
Old September 17th 08, 01:07 AM posted to rec.aviation.piloting
Peter Dohm
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Posts: 1,754
Default Why nitrogen?

"Viperdoc" wrote in message
...
Bertie:

I find this hard to swallow, and I doubt that oxygen (at 20% of air),
regardless of pressure, is going to cause a detonation in an oleo. Just
like in a tire, the percentage of oxygen remains the same, so its ability
to support combustion also remains the same. Now, the increased oxygen
pressure might slightly increase the risk of corrosion, but we are not
talking orders of magnitude higher compared to ambient. At least this is
my understanding as I recall from being a chemistry undergrad and grad
student.

The more I hear about this, the more I think it's an old wive's tale.

Anway, what did you think of Anthony's claim"it's not me?" What a moron.

About all that I know on the reactivity subject is by inferance from the
assertion that our own need for suplemental oxygen at altitude is based on
partial pressure. On that basis, it seems to make a sort of sense, even
though it would require a *lot* of pressure and might also require the oil
in the strut to be partially vaporized--possibly during the early stages of
the rebound after the struts were vigorously compressed.

In the case of light plane tires, I agree with you that really dry air
should work well enough to make the issue trivial. But, if you need
nitrogen for any other reason, it is the cheapest thing that I know of in an
L bottle or larger and using it in the tires may be essentially
free--because you may have to pay rental on the tanks if they are not
refilled at a prescribed interval.

Peter



  #2  
Old September 17th 08, 05:11 AM posted to rec.aviation.piloting
John Godwin
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Posts: 178
Default Why nitrogen?

"Peter Dohm" wrote in
:

In the case of light plane tires, I agree with you that really dry
air should work well enough to make the issue trivial. But, if
you need nitrogen for any other reason, it is the cheapest thing
that I know of in an L bottle or larger and using it in the tires
may be essentially free--because you may have to pay rental on the
tanks if they are not refilled at a prescribed interval.


My daughter is a Crew Chief on a C-130 Herc and said that Nitrogen is
used in the struts.

--
  #3  
Old September 17th 08, 09:55 PM posted to rec.aviation.piloting
Peter Dohm
external usenet poster
 
Posts: 1,754
Default Why nitrogen?

"John Godwin" wrote in message
...
"Peter Dohm" wrote in
:

In the case of light plane tires, I agree with you that really dry
air should work well enough to make the issue trivial. But, if
you need nitrogen for any other reason, it is the cheapest thing
that I know of in an L bottle or larger and using it in the tires
may be essentially free--because you may have to pay rental on the
tanks if they are not refilled at a prescribed interval.


My daughter is a Crew Chief on a C-130 Herc and said that Nitrogen is
used in the struts.

--


I'm sure that they use nitrogen in the tires as well--even though they run
at less than half of the pressure of a lot of the heavy jets--it just makes
sense to use it when you have it available.

Getting back to the original subject of whether nitrogen behaves in a manner
more like an "ideal gas" than air, aside from the issue of reactivity, the
answer is yes--especially as pressure is increased and/or temperature is
decreased. Basically, it is relatively easy to have nitrogen that is
extremely dry because it it normally dispensed from the top of a very high
pressure storage bottle--with the result that nearly all of any water vapor
and/or CO2 that is in the bottle will be left in a condensed form at the
bottom of the bottle.



  #4  
Old September 17th 08, 10:27 PM posted to rec.aviation.piloting
Bertie the Bunyip[_24_]
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Posts: 2,969
Default Why nitrogen?

John Godwin wrote in news:Xns9B1BD7A3321FBAvSvcs@
208.49.82.60:

"Peter Dohm" wrote in
:

In the case of light plane tires, I agree with you that really dry
air should work well enough to make the issue trivial. But, if
you need nitrogen for any other reason, it is the cheapest thing
that I know of in an L bottle or larger and using it in the tires
may be essentially free--because you may have to pay rental on the
tanks if they are not refilled at a prescribed interval.


My daughter is a Crew Chief on a C-130 Herc and said that Nitrogen is
used in the struts.


Your daughter smokes cigars?



Bertie
  #5  
Old September 18th 08, 12:41 AM posted to rec.aviation.piloting
Mick[_2_]
external usenet poster
 
Posts: 584
Default Why nitrogen?


"Bertie the Bunyip" wrote in message
...
John Godwin wrote in news:Xns9B1BD7A3321FBAvSvcs@
208.49.82.60:

"Peter Dohm" wrote in
:

In the case of light plane tires, I agree with you that really dry
air should work well enough to make the issue trivial. But, if
you need nitrogen for any other reason, it is the cheapest thing
that I know of in an L bottle or larger and using it in the tires
may be essentially free--because you may have to pay rental on the
tanks if they are not refilled at a prescribed interval.


My daughter is a Crew Chief on a C-130 Herc and said that Nitrogen is
used in the struts.


Your daughter smokes cigars?



Bertie


You're a dumb ass.


  #6  
Old September 18th 08, 12:45 AM posted to rec.aviation.piloting,alt.usenet.kooks
Bertie the Bunyip[_25_]
external usenet poster
 
Posts: 3,735
Default Why nitrogen?

"Mick" @_#`~#@.^net wrote in :


"Bertie the Bunyip" wrote in message
...
John Godwin wrote in
news:Xns9B1BD7A3321FBAvSvcs@ 208.49.82.60:

"Peter Dohm" wrote in
:

In the case of light plane tires, I agree with you that really dry
air should work well enough to make the issue trivial. But, if
you need nitrogen for any other reason, it is the cheapest thing
that I know of in an L bottle or larger and using it in the tires
may be essentially free--because you may have to pay rental on the
tanks if they are not refilled at a prescribed interval.

My daughter is a Crew Chief on a C-130 Herc and said that Nitrogen
is used in the struts.


Your daughter smokes cigars?



Bertie


You're a dumb ass.






Nope.


Bertie
  #7  
Old September 18th 08, 10:01 PM posted to rec.aviation.piloting
Mick[_2_]
external usenet poster
 
Posts: 584
Default Why nitrogen?


"Bertie the Bunyip" wrote in message
...
"Mick" @_#`~#@.^net wrote in :


"Bertie the Bunyip" wrote in message
...
John Godwin wrote in
news:Xns9B1BD7A3321FBAvSvcs@ 208.49.82.60:

"Peter Dohm" wrote in
:

In the case of light plane tires, I agree with you that really dry
air should work well enough to make the issue trivial. But, if
you need nitrogen for any other reason, it is the cheapest thing
that I know of in an L bottle or larger and using it in the tires
may be essentially free--because you may have to pay rental on the
tanks if they are not refilled at a prescribed interval.

My daughter is a Crew Chief on a C-130 Herc and said that Nitrogen
is used in the struts.


Your daughter smokes cigars?



Bertie


You're a dumb ass.






Nope.


Bertie


You're a cross posting dumb ass.


 




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