So, when the cabin is sealed, the interior pressure is equal to the atmospheric pressure at sea level. When the plane lands, the exterior pressure is equal to the interior pressure. So why does the plane need to be pressurised for the duration of the trip?
In: Engineering
At 30,000 feet there is very little air. It’s low pressure and would be very hard to breathe. Without pressurizing the air we would have to breathe very quickly in order to get enough oxygen and it would be extremely uncomfortable. Even with the pressurized cabins I get horrible ear and sinus pain. Without the pressure I’d be in agony.
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