Nothing to do with it being inert. As it doesnt change volume to a large degree the tyre is always inflatted to its correct pressure even at altitude where the air temp is -52oC, as the aircraft decends down to land the aircraft temps wont rise at the same rate as outside temps so the gas needs to be the same volume hot or cold.
Nitrogen-Filled Tyres
- Thread starter Phil W
- Start date
Nothing to do with it being inert. As it doesnt change volume to a large degree the tyre is always inflatted to its correct pressure even at altitude where the air temp is -52oC, as the aircraft decends down to land the aircraft temps wont rise at the same rate as outside temps so the gas needs to be the same volume hot or cold.
Are you suggesting the nitrogen is somehow immune to changes in pressure/volume with temperature, despite the numerous posts here explaining how nitrogen obeys the same laws as other gasses?
Nitrogen is used on aircraft tyres for it's inert properties. Also to minimise any moisture ingress that can freeze. The very same reason they use it accumulators. The very last thing you want when you raise the gear is have the tyre blow in the bay.
I can tell you it does still vary greatly with temp after a landing which is why we have to write our our pre-flight whether it's a hot or cold wheel when we record the tyre pressure. We regularly see a 200 psi tyre at 230 or more after a heavily braking session.
They do lose pressure slowly. A couple of psi per day.
I can tell you it does still vary greatly with temp after a landing which is why we have to write our our pre-flight whether it's a hot or cold wheel when we record the tyre pressure. We regularly see a 200 psi tyre at 230 or more after a heavily braking session.
They do lose pressure slowly. A couple of psi per day.