Which type of oxygen system is used on the flight deck?

The flight deck oxygen supply is the pressure breathing, diluter-demand type. Oxygen from a high pressure storage cylinder is reduced to a lower pressure and supplied to the crew stations. A regulator supplies the oxygen mask on demand up to a cabin altitude of 32,000 feet.



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There are three standard types of aviation oxygen systems:
  • Continuous flow: For aircraft that fly under 25,000 feet or utilize a portable oxygen supply.
  • Diluter demand: Meant for flight between 25,000 and 40,000 feet high.
  • Pressure demand: Systems for aviation at over 40,000 feet.


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The Federal Aviation Administration (FAA) doesn't allow passengers to bring portable oxygen tanks or liquid oxygen on board, so if you require oxygen during a flight, you'll have to use a portable oxygen concentrator.

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However, personal medical oxygen cylinders are not permitted in the aircraft cabin as they are considered hazardous materials by the Federal Aviation Administration. Please contact your airline for instructions on arranging oxygen service. Airlines are not required to provide oxygen service and many do not.

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Use items you have at home: balloons, balls, a fan and a stopwatch to act out or understand the forces that act on an airplane. Four forces affect an airplane while it is flying: weight, thrust, drag and lift.

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