  An aircraft cabin is used as a laboratory for studying the atmospheric
pressure during a flight. All the different steps of the flight: take-off,
cruise altitude climbing and landing are monitored with the use of the pressure
sensor of a smartphone. Specific details of the atmospheric pressure during
take-off and landing are given. Calculations are done for the aircraft nose
elevation angle during take-off, with the relation between the optimized cabin
pressure for the passenger comfort and the aircraft altitude.
