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Date: March 21, 2019, 05:09:53 AM


Why Aircraft Tyre Is Inflated With Nitrogen Instead Of Oxygen: Science : - Nigeria's Premier Online Forum


Why Aircraft Tyre Is Inflated With Nitrogen Instead Of Oxygen

By: Adenosine (M) |Time : August 18, 2016, 11:07:23 PM
Do you know the kind of pressure pumped into car tyres? What about the racing cars and aircrafts? Do you know the reasons why aircraft tyres are filled with Nitrogen instead of Oxygen?
In this article,you will know the reason why Nitrogen is used instead of Oxygen to inflate aircraft tyres.

The Nitrogen filled tyres are of so many advantages over Oxygen filled tyres of our cars.

Nitrogen as in the periodic table is a dry, inert gas which are used to inflate aircraft tyres, off-road truck tyres, military vehicle tyres, and race car tyres for improved performance, more tyre mileage and better fuel economy.

Oxygen in compressed air permeates through the wall of the tyre which reduces the tyre’s inflation pressure.
Nitrogen is used.  It is an inert gas so high pressures and temperatures do not affect it as with air.  It is also more compatible with rubber, and does not corrode like air containing oxygen and water vapor does. More importantly it will not support combustion or explosion as does air containing oxygen.

Commercial Airlines – The Federal Aviation Administration (FAA) requires nitrogen in all commercial aircraft tires to eliminate the potential for water vapor (inherent in normal compressed air) from freezing at high altitudes. In addition, aircraft manufacturers such as Boeing use nitrogen membranes in their On-Board Inert Gas Generation Systems (OBIGGS) to “top” fuel tanks with nitrogen – an inert gas that does not support combustion.

Consider if the brakes overheat and cause a fire. The nitrogen will not burn, but air has oxygen which will increase the fire. Aircraft tyres are fused. When the fuse is heated it deflate the tyre so they do not explode.

The huge tyres on aircraft are expensive, and difficult to mount and dismount. They are also subjected to tremendous forces on landing when they must accelerate very quickly. The friction on touchdown creates great heat within the tyres and produces very high stresses in the walls of the carcass. Since normal atmospheric air is approximately 20% oxygen, the tires are inflated with 100% nitrogen which is a relatively inert gas.

Air has a certain moisture content and it is generally very hard to remove this moisture. If aircraft tyres were filled with air, at the flight altitude ice would formed inside the tires since the temp up there is about -30 degrees F. Landing with a huge amount of ice in the tyre would make it out of balance and change the tyre pressure. Nitrogen does not form a liquid till -173 degree C and pure nitrogen has almost no moisture. Tyres would probably burst. Therefore, every effort is made to reduce or eliminate the deterioration caused over time by oxidation.
There are so many advantages of Nitrogen over Air.
You can read more about NITROGEN FILLED TYRES.

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