| Aviation oxygen system is a complex mechanism and | | | | The next oxygen system that are aircraft compatible |
| requires good maintenance. Generally there are three | | | | is 'altitude adjustable oxygen ' system that is like the |
| types of aviation oxygen systems that are being | | | | constant flow system with the additional facility of |
| used namely, constant flow, altitude adjustable and | | | | adjustable control for maintaining the flow. It is done |
| altitude compensating. All of them can be found in | | | | by the control knob for the reading on a gauge that |
| different aircraft types and have plus and minus | | | | is also calibrated in altitude in symmetry with the |
| points. | | | | aircraft altimeter setting. Though this system is not |
| Constant Flow Systems is the most common and | | | | commonly used in the built in types, portable |
| low cost aircraft oxygen system in aviation industry | | | | systems have been incorporating it to a greater deal. |
| is the constant flow system. It consists of cylinder, | | | | The next system is the 'Altitude Compensating |
| regulator and manifold system. All the oxygen | | | | system' which has many similar features of altitude |
| systems have cylinders and constitute of steel, | | | | adjustable features but in this system the |
| composite metals and aluminum. Most of the | | | | adjustments are done on automatically. Mooney and |
| regulators used are the diaphragm type and the tank | | | | Beechcraft use this type of aviation oxygen system |
| pressure is maintained at 2200 psi or pounds per sq. | | | | and few portable devices for oxygen are also |
| inch. The constant flow systems provide a uniform | | | | manufactured on these lines. The main disadvantage |
| output pressure at all altitudes. | | | | in this system being incorporated in the aircraft is |
| It is preferred over other types because of the low | | | | that the oxygen only starts at a certain height of |
| cost and very low maintenance. The output of the | | | | 8000 to 10,000 feet. In case the oxygen system |
| regulator is 2.5 - 3.0 liters/minute at line pressure of | | | | needs to be started at lower altitude, many times is |
| 25 to 75 pounds. It's controlled by the connector | | | | a problem. |
| attached to the manifold system. Usually factory | | | | Changing needs give rise to new technology and |
| manufactured oxygen systems in Cessna aircraft use | | | | demand leads to modifications. Aircraft oxygen |
| this type of a constant flow system. Portable units | | | | system has been developed, after much trial and |
| of oxygen supply are also based on this system of | | | | error and now have become compatible with |
| oxygen supply. | | | | different modes of oxygen supply. |