A double-deck pressure cabin.
How does a double-deck airliner keep its cabin pressurized?
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How does a double-deck airliner keep its cabin pressurized?
Fit the components before testing.
Compressors supply air while an outflow valve regulates its escape. The pressure difference follows cabin altitude rather than outside altitude. Both passenger decks share the pressurized fuselage.
A380 double-deck cutaway used to explain cabin pressure, not flight lift. Exponential atmosphere approximation; illustrative supply/leak inputs. Not an aircraft operating procedure or certified pressure schedule.
At 11 km flight altitude, keep cabin altitude below 2.4 km and maintain air supply.
Keep cabin altitude low while supply meets outflow.