4 ms·

And we should all remember to keep our seat belts on. And also seriously you should put your mask on first quickly before helping others. Your ancestors didn'

And we should all remember to keep our seat belts on. And also seriously you should put your mask on first quickly before helping others. Your ancestors didn't experience a lack of oxygen without excess CO2 so you'll only experience the later as feeling that you're running out of breath. Without oxygen you can become too stupid to put on your air mask[1], then black out and die without noticing something is wrong. And if you're working in a lab with a cryogenic liquid that spills don't try to be a hero, just get you and your lab-mates out of there. [1]https://www.youtube.com/watch?v=kUfF2MTnqAw https://www.youtube.com/watch?v=kUfF2MTnqAw

petee 9y ago
The guy who recorded himself didn't even wear the mask properly
- cyberferret 9y ago
  I saw another cabin pic and it looked like NO ONE had their oxygen masks on properly. I wish people would actually listen when the stewardesses say "Place over your nose AND mouth and breath normally". Putting the mask cup over just your mouth is next to useless.
  - gowld 9y ago
    What happens if you don't cover your nose?
    - lutorm 9y ago
      As long as you remember to only breathe through your mouth, nothing. But if you don't, you'll pass out just as quickly as you would without the mask.
    - cyberferret 9y ago
      You essentially won't be getting the oxygen. In reality - those yellow masks are borderline ineffective anyway. You basically need an airtight seal around your entire nose and mouth otherwise the pure O2 will simply vent away. But at the altitudes that commercial aircraft fly at, it is better than nothing. Below about 25,000 feet they provide a little more time before onset of hypoxia, but above 35,000 they would be useless. Best bet if you are at higher altitudes is to hold the mask on as tight as possible and try to eliminate any gaps. If you notice the oxygen masks that the pilots use (and that fighter pilots use), they are a very different beast, and have secure latching mechanisms to hold the mask tightly against your face with NO gaps at all. (Also a reason why beards are banned for flight crew in the air force - can't have ANY gaps where the O2 can leak out). My old flight instructor used to fly jets in the Air Force back in the 50's and 60's, when the cockpits were unpressurised, and he said that at altitudes around 60,000+ feet, if your oxygen mask failed, you had about 1 second of consciousness. In fact, he said at those altitudes, the pressure differential was so great that your diaphragm actually couldn't expand to enable normal breathing, and they used to have liquid oxygen pressure fed through their masks. If they wanted to breath, they just opened their mouth and freezing cold LOX (which vaporised almost instantly at that altitude) would be rammed down their gullets...
      - Symmetry 9y ago
        Even in space you should have ~10 seconds of consciousness before you black out, same as in strangulation that cuts off your carotids. But yeah, oxygen masks are hard.
  - userbinator 9y ago
    Of course the masks work better with both the nose and mouth in them, but people tend to "gasp for air" in emergencies anyway, so just the mouth would be enough to inhale oxygen.
  - petee 9y ago
    Rewatched the video, and you can even see the drawing on the bag showing proper use. I'm sure in a panic you're not thinking but still...I agree, they tell you this stuff for a reason - I fully read the safety card every time: for example, some planes will sink if you open the rear exit in a water landing!
ben-schaaf 9y ago
Interestingly, each unit uses a chemical reaction to create the oxygen individually. They have fuel for around 15 minutes. So the moment the plane loses pressure, the pilots need to dive to a safe altitude where the masks are no longer required.
- scottie_m 9y ago
  It’s a similar tech to the oxygen candles use in old emergency self rescue units in mines, and still carried aboard submarines. https://en.m.wikipedia.org/wiki/Chemical_oxygen_generator https://en.m.wikipedia.org/wiki/Chemical_oxygen_generator
Analemma_ 9y ago
If you're wondering whether it makes a difference, yes, it really does: https://en.wikipedia.org/wiki/Asiana_Airlines_Flight_214 https://en.wikipedia.org/wiki/Asiana_Airlines_Flight_214 "Two 16-year-old girls with Chinese passports were found dead outside the aircraft soon after the crash, having been thrown out of the aircraft during the accident.[1]:108–110[37][38][39][40] Neither victim was using her seatbelt.[1]:108-110 It is likely that these passengers would have remained in the cabin and survived if they had been wearing their seatbelts.[1]:xii,110"
- russdill 9y ago
  Not sucked out of the plane is one of the least important reasons to buckle up. The chances of this happening to any one passenger is just astronomical. I can't find any examples in commercial aviation where a seated passenger got sucked out without their seat. It has happened to a standing flight attendant, and in that case a very large section of the aircraft had suddenly separated. Of course, buckling up during take offs and landings will certainly reduce your chances of injury/death in the event of a crash. And buckling up during flight will reduce your chances of injury during unexpected turbulence.
  - petee 9y ago
    British Air flight 5390 had the cockpit window blow out, and the pilot sucked partially out; held in by a crew member, and getting his legs caught in the controls - it says he was wedged in the window for 20 minutes https://en.wikipedia.org/wiki/British_Airways_Flight_5390 https://en.wikipedia.org/wiki/British_Airways_Flight_5390
    - russdill 9y ago
      Much larger windows. Some of the currently unverified info points to this flight being a similar thing. Part of her may have been out of the aircraft but the window was of course to small for the rest of her to exit. I'm really confused as to the report that the cabin crew was trying to plug the hole with various objects. That just makes zero sense. https://www.cnn.com/2018/04/17/us/philadelphia-southwest-flight-emergency-landing/index.html https://www.cnn.com/2018/04/17/us/philadelphia-southwest-fli... "Tranchin told WPVI the crew was frantically trying to plug a hole left when a window shattered." There's currently too many conflicting accounts.
starpilot 9y ago
It's being reported that she was wearing her seatbelt: https://www.telegraph.co.uk/news/2018/04/19/woman-sucked-southwest-plane-window-wearing-seatbelt-died-blunt/?utm_source=quora https://www.telegraph.co.uk/news/2018/04/19/woman-sucked-sou... It seems reasonable that a band of fabric over your lap wouldn't restrain you from being pulled upward out of your seat, unless it was pulled extremely tight.

petee 9y ago

The guy who recorded himself didn't even wear the mask properly

cyberferret 9y ago
I saw another cabin pic and it looked like NO ONE had their oxygen masks on properly. I wish people would actually listen when the stewardesses say "Place over your nose AND mouth and breath normally". Putting the mask cup over just your mouth is next to useless.
- gowld 9y ago
  What happens if you don't cover your nose?
  - lutorm 9y ago
    As long as you remember to only breathe through your mouth, nothing. But if you don't, you'll pass out just as quickly as you would without the mask.
  - cyberferret 9y ago
    You essentially won't be getting the oxygen. In reality - those yellow masks are borderline ineffective anyway. You basically need an airtight seal around your entire nose and mouth otherwise the pure O2 will simply vent away. But at the altitudes that commercial aircraft fly at, it is better than nothing. Below about 25,000 feet they provide a little more time before onset of hypoxia, but above 35,000 they would be useless. Best bet if you are at higher altitudes is to hold the mask on as tight as possible and try to eliminate any gaps. If you notice the oxygen masks that the pilots use (and that fighter pilots use), they are a very different beast, and have secure latching mechanisms to hold the mask tightly against your face with NO gaps at all. (Also a reason why beards are banned for flight crew in the air force - can't have ANY gaps where the O2 can leak out). My old flight instructor used to fly jets in the Air Force back in the 50's and 60's, when the cockpits were unpressurised, and he said that at altitudes around 60,000+ feet, if your oxygen mask failed, you had about 1 second of consciousness. In fact, he said at those altitudes, the pressure differential was so great that your diaphragm actually couldn't expand to enable normal breathing, and they used to have liquid oxygen pressure fed through their masks. If they wanted to breath, they just opened their mouth and freezing cold LOX (which vaporised almost instantly at that altitude) would be rammed down their gullets...
    - Symmetry 9y ago
      Even in space you should have ~10 seconds of consciousness before you black out, same as in strangulation that cuts off your carotids. But yeah, oxygen masks are hard.
- userbinator 9y ago
  Of course the masks work better with both the nose and mouth in them, but people tend to "gasp for air" in emergencies anyway, so just the mouth would be enough to inhale oxygen.
- petee 9y ago
  Rewatched the video, and you can even see the drawing on the bag showing proper use. I'm sure in a panic you're not thinking but still...I agree, they tell you this stuff for a reason - I fully read the safety card every time: for example, some planes will sink if you open the rear exit in a water landing!

ben-schaaf 9y ago

Interestingly, each unit uses a chemical reaction to create the oxygen individually. They have fuel for around 15 minutes. So the moment the plane loses pressure, the pilots need to dive to a safe altitude where the masks are no longer required.

scottie_m 9y ago
It’s a similar tech to the oxygen candles use in old emergency self rescue units in mines, and still carried aboard submarines. https://en.m.wikipedia.org/wiki/Chemical_oxygen_generator https://en.m.wikipedia.org/wiki/Chemical_oxygen_generator

Analemma_ 9y ago

If you're wondering whether it makes a difference, yes, it really does: https://en.wikipedia.org/wiki/Asiana_Airlines_Flight_214 https://en.wikipedia.org/wiki/Asiana_Airlines_Flight_214 "Two 16-year-old girls with Chinese passports were found dead outside the aircraft soon after the crash, having been thrown out of the aircraft during the accident.[1]:108–110[37][38][39][40] Neither victim was using her seatbelt.[1]:108-110 It is likely that these passengers would have remained in the cabin and survived if they had been wearing their seatbelts.[1]:xii,110"

russdill 9y ago
Not sucked out of the plane is one of the least important reasons to buckle up. The chances of this happening to any one passenger is just astronomical. I can't find any examples in commercial aviation where a seated passenger got sucked out without their seat. It has happened to a standing flight attendant, and in that case a very large section of the aircraft had suddenly separated. Of course, buckling up during take offs and landings will certainly reduce your chances of injury/death in the event of a crash. And buckling up during flight will reduce your chances of injury during unexpected turbulence.
- petee 9y ago
  British Air flight 5390 had the cockpit window blow out, and the pilot sucked partially out; held in by a crew member, and getting his legs caught in the controls - it says he was wedged in the window for 20 minutes https://en.wikipedia.org/wiki/British_Airways_Flight_5390 https://en.wikipedia.org/wiki/British_Airways_Flight_5390
  - russdill 9y ago
    Much larger windows. Some of the currently unverified info points to this flight being a similar thing. Part of her may have been out of the aircraft but the window was of course to small for the rest of her to exit. I'm really confused as to the report that the cabin crew was trying to plug the hole with various objects. That just makes zero sense. https://www.cnn.com/2018/04/17/us/philadelphia-southwest-flight-emergency-landing/index.html https://www.cnn.com/2018/04/17/us/philadelphia-southwest-fli... "Tranchin told WPVI the crew was frantically trying to plug a hole left when a window shattered." There's currently too many conflicting accounts.

starpilot 9y ago

It's being reported that she was wearing her seatbelt: https://www.telegraph.co.uk/news/2018/04/19/woman-sucked-southwest-plane-window-wearing-seatbelt-died-blunt/?utm_source=quora https://www.telegraph.co.uk/news/2018/04/19/woman-sucked-sou... It seems reasonable that a band of fabric over your lap wouldn't restrain you from being pulled upward out of your seat, unless it was pulled extremely tight.