What type of oxygen system is most commonly found in general aviation aircraft?

The most commonly found oxygen system in general aviation aircraft is the continuous flow system. This system operates by delivering a steady stream of oxygen to the pilot and passengers as they breathe in, without the need for inhalation to initiate the flow. Continuous flow systems are particularly advantageous in general aviation settings because they are simple, lightweight, and cost-effective, making them ideal for smaller aircraft that operate at lower altitudes and are not typically subject to high-performance demands like those seen in commercial or military aviation.

In a continuous flow system, the oxygen is delivered through a mask or nasal cannula, allowing for easy use while maintaining a consistent supply as altitude increases. This means that when flying at altitudes where supplemental oxygen is required, occupants can efficiently receive oxygen without complicated mechanisms or additional equipment.

In contrast, demand systems require the pilot or passenger to inhale to activate the flow of oxygen, which can be less convenient during high workload phases of flight. Pressure demand systems, while effective at high altitudes, are more complex and primarily used in larger aircraft due to their requirements for pressurization. Liquid oxygen systems are also used in specialized aviation contexts due to their compact nature but are less common in typical general aviation operations.