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Tire inflation pressure



 
 
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  #1  
Old November 7th 03, 03:51 AM
Paul Lee
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Default Tire inflation pressure

What is the proper pressure to use with 5.00-5 mains and 10x3.50-4 nose
for a 2250 gross canard plane?

Another related question: both mains tend to loose air slowly - would
be flat after about 3 months sitting. Is this typical or should I get
new tubes?

----------------------------------------------------
Paul Lee, SQ2000 canard project: www.abri.com/sq2000
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  #2  
Old November 7th 03, 04:35 AM
Del Rawlins
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Default

On 06 Nov 2003 06:51 PM, Paul Lee posted the following:
What is the proper pressure to use with 5.00-5 mains and 10x3.50-4
nose for a 2250 gross canard plane?

Another related question: both mains tend to loose air slowly - would
be flat after about 3 months sitting. Is this typical or should I get
new tubes?


Try new valve cores.

----------------------------------------------------
Del Rawlins-
Remove _kills_spammers_ to reply via email.
Unofficial Bearhawk FAQ website:
http://www.rawlinsbrothers.org/bhfaq/
  #3  
Old November 7th 03, 06:07 AM
REEI2002
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Default

Try Nitrogen instead of air, aviation type rubber tubes leak molecular air.
Nitrogen molecules are larger.
  #4  
Old November 7th 03, 06:27 AM
Del Rawlins
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Default

On 06 Nov 2003 09:07 PM, REEI2002 posted the following:
Try Nitrogen instead of air, aviation type rubber tubes leak molecular
air. Nitrogen molecules are larger.


Atmospheric air is mostly nitrogen.

----------------------------------------------------
Del Rawlins-
Remove _kills_spammers_ to reply via email.
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http://www.rawlinsbrothers.org/bhfaq/
  #5  
Old November 7th 03, 07:05 AM
John E. Carty
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"REEI2002" wrote in message
...
Try Nitrogen instead of air, aviation type rubber tubes leak molecular

air.
Nitrogen molecules are larger.


Considering air is 77% Nitrogen, how much difference does this really make
when it comes to seepage of this kind? :-)


  #6  
Old November 7th 03, 07:19 AM
[email protected]
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Default

On Fri, 07 Nov 2003 07:05:24 GMT, "John E. Carty"
wrote:

:
:"REEI2002" wrote in message
...
: Try Nitrogen instead of air, aviation type rubber tubes leak molecular
:air.
: Nitrogen molecules are larger.
:
:Considering air is 77% Nitrogen, how much difference does this really make
:when it comes to seepage of this kind? :-)

And almost all the rest - Oxygen (21%, atomic weight 32) and Argon
(.94%, atomic weight 40) and Carbon Dioxide (.03%, atomic weight 38)
have larger molecules than Nitrogen (atomic weight, 28)
  #7  
Old November 7th 03, 11:19 AM
B. B.
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Default



Another related question: both mains tend to loose air slowly - would
be flat after about 3 months sitting. Is this typical or should I get
new tubes?


Try new valve cores.

Del Rawlins-

+++++++++++++++++++++++

Wish I could go as long as 3 months.

I've been informed that AIRCRAFT tubes
are manufactured from GENUINE RUBBER.....
and are porous by their very nature.

I've also been told Michelin tubes leak the least.
Dunno, but wouldn't bet the farm on this rumor.
They_ARE_ expensive.

Try the valve cores, but chances of BOTH
being the cause of you problem is slim to none.
If it doesn't help, at least it's a cheap education.


Barnyard BOb --
Over 50 years of successful flight...
Eat your heart out, BEN HASS. ---

  #8  
Old November 7th 03, 12:39 PM
Whunicut
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Default

What is the proper pressure to use with 5.00-5 mains and 10x3.50-4 nose
for a 2250 gross canard plane?

Another related question: both mains tend to loose air slowly - would
be flat after about 3 months sitting. Is this typical or should I get
new tubes?

-------------------------------------------------


1. Blow `em up until the sidewalls come off the ground.
2. Go to Home Depot and get some garden tractor/riding mower tubes. Use the
old tubes for your rubber band gun.

Warren,
59 years of dicking around planes.
  #9  
Old November 7th 03, 01:56 PM
Ron Natalie
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Default


"John E. Carty" wrote in message ...

"REEI2002" wrote in message
...
Try Nitrogen instead of air, aviation type rubber tubes leak molecular

air.
Nitrogen molecules are larger.


Considering air is 77% Nitrogen, how much difference does this really make
when it comes to seepage of this kind? :-)


And Oxygen, the next largest component (almost 21%) is even larger. Then
you get down to Argon at 1% (which is bigger yet).

Unless you were previously filling your tires with helium, there isn't much to be gained
on diffusion by this change.



  #10  
Old November 7th 03, 02:38 PM
Paul Lee
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Default

Yeah... By now after two years, most oxygen molecules should
have leaked out and should have 99% nitro.

"John E. Carty" wrote in message .. .
"REEI2002" wrote in message
...
Try Nitrogen instead of air, aviation type rubber tubes leak molecular

air.
Nitrogen molecules are larger.


Considering air is 77% Nitrogen, how much difference does this really make
when it comes to seepage of this kind? :-)

 




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