tyre pressures at altitude
When you take your bicycle on a wide-body, they ask you to take the air out of the tyres (even though the apparent altitude inside the aircraft is only about 8000ft - I think).
What about the tyres on the aircraft itself?
My understanding is that the big boys use nitrogen, which does not alter in volume to a great degree with altitude (and that any increase due to lower outside air pressure is offset by reduction within the tyre due to lower temperatures)?
For GA then, do we rely on this cancelling out (expansion due to altitude - compression due to temperature) alone? I don't put nitrogen in my tyres!
Is this pressure issue something you should consider if heading for a high altitude field? Perhaps take off 'on the low side'?
Sorry, still Sunday morning!
Sam.