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Very minor changes: dioxygen -> oxygen, aircrafts -> aircraft.
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Russell McMahon
Russell McMahon
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If aircraftsaircraft are pressurised, why do our ears pop during liftoff and landing?

Something hit me during my last flight: our ears feel that the pressure around us changes quickly during liftoff and landing, they hurt more and more until we make them pop. However, the cabin must maintain a level of dioxygenoxygen higher than outside the aircraft because it isn't dense enough at ~10km to breathe normally.

Does that mean that the aircraft merely takes air from the outside, heats it up (it's around -40°C outside at 10km) and adds dioxygenoxygen to it before blowing it inside? How else?

If aircrafts are pressurised, why do our ears pop during liftoff and landing?

Something hit me during my last flight: our ears feel that the pressure around us changes quickly during liftoff and landing, they hurt more and more until we make them pop. However, the cabin must maintain a level of dioxygen higher than outside the aircraft because it isn't dense enough at ~10km to breathe normally.

Does that mean that the aircraft merely takes air from the outside, heats it up (it's around -40°C outside at 10km) and adds dioxygen to it before blowing it inside? How else?

If aircraft are pressurised, why do our ears pop during liftoff and landing?

Something hit me during my last flight: our ears feel that the pressure around us changes quickly during liftoff and landing, they hurt more and more until we make them pop. However, the cabin must maintain a level of oxygen higher than outside the aircraft because it isn't dense enough at ~10km to breathe normally.

Does that mean that the aircraft merely takes air from the outside, heats it up (it's around -40°C outside at 10km) and adds oxygen to it before blowing it inside? How else?

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Mister Mystère
Mister Mystère
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If aircrafts are pressurised, why do our ears pop during liftoff and landing?

Something hit me during my last flight: our ears feel that the pressure around us changes quickly during liftoff and landing, they hurt more and more until we make them pop. However, the cabin must maintain a level of dioxygen higher than outside the aircraft because it isn't dense enough at ~10km to breathe normally.

Does that mean that the aircraft merely takes air from the outside, heats it up (it's around -40°C outside at 10km) and adds dioxygen to it before blowing it inside? How else?