I'm pretty sure you wouldn't be the first to try it...

Ssssh

All comercial aircraft employed in pax/cargo use have to have nitrogen in the tyres. But on 747 there are shed loads of wheels/tyres anyway (16 central undercarriage) and each tyre comes in at about £4500. I am told that as confirmed here at 37000 ft there is no change in the tyre pressure. Lastly if the aircraft were to be parked up for weeks / months the tyres rtetain their shape, the part in touch with the ground does not bottom out too much. Thank you for choosing to fly with us today, yet another wet dat at LHR.

Don't take this the wrong way, but when was the last time you looked up from the top of Everest, and saw an Octy driving by a mile above you?

I don't know for sure, but I think aircraft tyres are completely different construction to car tyres anyway.

Because it's surprisingly easy to flood the room with it by accident. Your body has no mechanism for detecting this (you can detect high carbon dioxide though), so the first you know is when you pass out because all the oxygen has been displaced.

Lady Bertie McHobnobs, my best beloved, works with liquid nitrogen on a regular basis. The common misconception is that the primary risk is from burns because of the low temperature; in fact it's the gaseous nitrogen boiling off that's the most dangerous aspect. You never work with it alone, you have a personal oxygen monitor, the room has its own monitor and there's a forced-air ventilation system too.

If you do it somewhere large enough and properly ventilated then it shouldn't be a big risk, but why bother? If someone accidentally knocks the valve off the cylinder the room can flood very quickly indeed - unlikely but possible and serious.

If someone knocks the valve off accidentally, the cylinder would provide the room with a new ventilation hole.

And the next room.

And the next room.

All about 10" round.

True - I had neglected to consider that.

Been there done that have a look at Uniflate - Nitrogen Tyre Inflation - Home

Phil