Continuous Flow
Hi can anyone tell me any good info on aircraft oxygen systems, e.g drop down mask, continuous flow, gaseous?
They can be manually activated or they will activate automatically if the cabin pressure decreases beyond a specific point. They are not in-demand regulator type but rather, constant flow. Some air from the cabin gets mixed in and this makes them ineffective at protecting you from smoke in the cabin - the single leading cause of death aboard airplanes.
Pilots have in-demand regulator type masks and goggles. They can switch them to 100% oxyge so that no cabin air gets into them. A separate oxygen line provides slight positive pressure on the goggles to clear them of smoke and keep them clear.
The only thing the cabin oxygen system will do is protect you from a decrease in pressure. They will not protect you against smoke or fumes.
One thing that the airlines could do (but don't), is provide you with an EPOS hood. An EPOS hood completely covers your head and has its own oxygen generating system. This would protect you against smoke or fumes, and would drastically increase your chances of survival.
If you have any other specific questions about O2 systems then feel free to e-mail me. Take care.
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