It compresses air into 20 PSI chamber with N2 adsorbed, leaving 90% O2. This is mostly released to patient, some back through the chamber to release N2. Weigh 10 pounds or less, binocular sized case, batteries lasts most of a day, can be recharged from 12V, 120V, 240V, 100W. In 2009 FAA approved for 19+ passenger …
It compresses air into 20 PSI chamber with N2 adsorbed, leaving 90% O2. This is mostly released to patient, some back through the chamber to release N2. Weigh 10 pounds or less, binocular sized case, batteries lasts most of a day, can be recharged from 12V, 120V, 240V, 100W. In 2009 FAA approved for 19+ passenger aircraft. $100-1000. So sea level is 21% O2 at 14.7 PSI is 3.09 pPSI O2. 39,000 ft 3.52 PSI require 88% to totally replace sea level O2. 49,000 ft would be like 10,000 ft pPSI O2.
So, you're suggesting this is a piece of equipment that hijackers could bring aboard a plane, avoiding bans on bottled gases in carry-on bags, that would allow them to stay conscious and active after depressurizing the plane?
FAA approved. Just say they have COPD. Not sure if prescription is required. Actually I would suggest Pilots and one steward per cabin have one on until descending for landing to reduce bends, be ready for depressurization incident like Helios or Payne Stewart. It feeds to a tube under the nose with the prongs into nostrils. Just need ti inhale through nose.
There is only a few seconds of O2 in the compression chamber, so not enough for an explosion risk. And only enough flow for 1 person so nothing like Apollo1.
(1) the concentrator absorbs oxygen from ambient air, so after depressurization the oxygen concentration is much lower
(2) it doesn't come with a pressure-breathing mask (like the captain has in the cockpit), so the device suffers from the same problem as the standard masks in the cabin which are not pressure-breathing masks.
Thanks, Peter. It's an interesting idea, I hadn't heard of it before. Of course there's any number of ways the perpetrators, whoever they were, might have managed the passengers and crew, depressurization only being one of them.
https://en.wikipedia.org/wiki/Portable_oxygen_concentrator
It compresses air into 20 PSI chamber with N2 adsorbed, leaving 90% O2. This is mostly released to patient, some back through the chamber to release N2. Weigh 10 pounds or less, binocular sized case, batteries lasts most of a day, can be recharged from 12V, 120V, 240V, 100W. In 2009 FAA approved for 19+ passenger aircraft. $100-1000. So sea level is 21% O2 at 14.7 PSI is 3.09 pPSI O2. 39,000 ft 3.52 PSI require 88% to totally replace sea level O2. 49,000 ft would be like 10,000 ft pPSI O2.
So, you're suggesting this is a piece of equipment that hijackers could bring aboard a plane, avoiding bans on bottled gases in carry-on bags, that would allow them to stay conscious and active after depressurizing the plane?
FAA approved. Just say they have COPD. Not sure if prescription is required. Actually I would suggest Pilots and one steward per cabin have one on until descending for landing to reduce bends, be ready for depressurization incident like Helios or Payne Stewart. It feeds to a tube under the nose with the prongs into nostrils. Just need ti inhale through nose.
Very interesting, thanks. I'd never heard of that.
There is only a few seconds of O2 in the compression chamber, so not enough for an explosion risk. And only enough flow for 1 person so nothing like Apollo1.
@jeffwise : I don't think this works, because
(1) the concentrator absorbs oxygen from ambient air, so after depressurization the oxygen concentration is much lower
(2) it doesn't come with a pressure-breathing mask (like the captain has in the cockpit), so the device suffers from the same problem as the standard masks in the cabin which are not pressure-breathing masks.
Thanks, Peter. It's an interesting idea, I hadn't heard of it before. Of course there's any number of ways the perpetrators, whoever they were, might have managed the passengers and crew, depressurization only being one of them.