B787 O2 supply

[Flight Alloy]

Originally Posted by The Bartender

Right....
Google CPAP...

Thanks for the tip.The medical journal Thorax,

J H Ficker, G H Wiest, G Lehnert, B Wiest, E G Hahn, Evaluation of an auto-CPAP device for treatment of obstructive sleep apnoea. Thorax 1988;53:643–648.

gives a CPAP average treatment pressure of 7.8mbar above atmospheric, which comes out to around 0.8% above ambient pressure. I wouldn't exactly call that 'overpressure breathing', a stiff wind should cause higher pressure differential. Before doing the whole LMGTFY game, perhaps you would consider informing yourself a little bit too before spouting unfounded statements?