Question

Aircraft cabins are 'pressurised'. Air is gradually pumped into the aircraft as it climbs, and then let out again when it lands. Why?​

Answer 1

Explanation:

Airplane cabins are pressurized by forcing air into the cabin. Just like you pressurize a car tire by flowing air into it, airplanes do the same for the cabin. Air is pumped into the cabin, and because the cabin is sealed, the pressure increases. Normally, this pressure is created from the engines used to power the airplane. As the engines turn fuel and generate combustion, some of the air is forced into the cabin (don’t worry; it’s clean) to achieve an appropriate pressure.