Squigee
Topic Author
Posts: 634
Joined: Sun May 20, 2001 3:21 pm

Nitrogen In Tires?

Wed Oct 10, 2001 10:18 am

I asked this question in the main forum and only got a partial. Is nitrogen used in tires? Why? More info, please!

Squigee
Someday, we'll look back at this, laugh nervously, and then change the subject.
 
AJ
Posts: 2295
Joined: Wed Nov 03, 1999 3:54 pm

RE: Nitrogen In Tires?

Wed Oct 10, 2001 11:03 am

Due to the high temperatures often reached in any aircraft tires rapidly expansive gases are not suitable. Many elements in air are rapidly expansive and would cause blowouts on most landings. Nitrogen is less expansive at high temperatures therefore perfect for aircraft tires.
 
Minuteman
Posts: 260
Joined: Sat Aug 05, 2000 1:01 am

RE: Nitrogen In Tires?

Wed Oct 10, 2001 12:22 pm

Nitrogen is also not an oxidizer. This means if the pressurized gas from a tire decides to blow out onto the grease and dirt on a strut, which is also right next to a hot brake rotor, it shouldn't help anything burst into flames.
 
Squigee
Topic Author
Posts: 634
Joined: Sun May 20, 2001 3:21 pm

RE: Nitrogen In Tires?

Thu Oct 11, 2001 2:13 am

Thanks guys,

that really clears it up!

Squigee
Someday, we'll look back at this, laugh nervously, and then change the subject.
 
air2gxs
Posts: 1443
Joined: Mon Jun 18, 2001 1:29 pm

RE: Nitrogen In Tires?

Thu Oct 11, 2001 10:33 am

Nitrogen is also inert. As stated it will not burst into flames but, will not support combustion and will act as a smothering agent if a tire were to blow due to excessive heat in the W/W from a fire.
 
Metwrench
Posts: 715
Joined: Fri Aug 17, 2001 11:25 am

RE: Nitrogen In Tires?

Thu Oct 11, 2001 12:41 pm

Air2gxs & Minutman, you are both right. Also N2 is devoid of moisture where as compressed air is full of water. Water can collect inside of a wheel/tire and create an imbalance. An out of balance tire on your car is obnoxious at 65 mph, you can imagine the effect at 120mph.
 
avionic
Posts: 107
Joined: Sat Nov 13, 1999 3:45 am

RE: Nitrogen In Tires?

Fri Oct 12, 2001 11:49 pm

doesn´t some maintenance manuals allow other gasses then nitrogen to be filled on tires in case of no nitrogen available and on a line station?
 
air2gxs
Posts: 1443
Joined: Mon Jun 18, 2001 1:29 pm

RE: Nitrogen In Tires?

Mon Oct 15, 2001 11:18 am

Yest, the MM does allow the substitution of air for N2 as long as the air is removed and replaced by N2 at the next available station.
 
OPNLguy
Posts: 11191
Joined: Tue Jun 15, 1999 11:29 am

RE: Nitrogen In Tires?

Mon Oct 15, 2001 11:51 am

An object lesson in what can happen when you mix:

1/ Takeoff from a hot&high airport, and
2/ A dragging brake, and
3/ Air in the tires versus nitrogen.

http://aviation-safety.net/database/1986/860331-1.htm
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.

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