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Why can’t planes just pressurize the outside air for breathing? No need to bring your own o2?
by mrfusion 7y ago
Why can’t planes just pressurize the outside air for breathing? No need to bring your own o2?
- ohazi 7y agoBig planes do this. In a little plane, that's expensive and heavy and you still need to have a backup system in case it fails.
- ogre_codes 7y agoBecause for a small aircraft, the weight and energy requirements of a compressor is greater than the weight of a small tank full of oxygen.
- phkahler 7y agoAnd the increased structural and sealing requirements of being several PSI above ambient. That will add cost, complexity and weight.
- stefanix 7y agoMost planes use turbine bleed air to pressurize the cabin. This of course implies that the plane has a turbine and a cabin that can hold positive pressure. They are usually $500/h+ planes.