Poisonous gas attack on plane. Effective?

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Batman

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#1835440 2-Aug-2017 09:48

Re non closed systems

How fast is the "higher" pressure oxygen coming out?

Let's say you inhale a 1L breath. How fast does that 1L get inhaled? Probably 1s.

The oxygen equipment will need to be flowing at 60L per minute* for all that 1s, when you take a breath, if the mouth and nose is not sealed into a closed system.

Handle9

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#1835472 2-Aug-2017 10:09

empacher48:
Aviation Security screening is mostly for show, there are still checks that the airlines will do in the background when you buy a ticket.

I flew to Australia yesterday and the security theatre was even more intrusive. You had to remove your phone and iPad from cases. My work iPad is in a keyboard case and that was treated as a laptop during descent.

Talking to my colleagues from other parts of Australia last night it was even worse domestically, checked luggage was searched and the delays were incredible.

Jase2985

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#1835826 2-Aug-2017 15:47

Batman:

Re non closed systems

How fast is the "higher" pressure oxygen coming out?

Let's say you inhale a 1L breath. How fast does that 1L get inhaled? Probably 1s.

The oxygen equipment will need to be flowing at 60L per minute* for all that 1s, when you take a breath, if the mouth and nose is not sealed into a closed system.

depends on what its set at, between 1 and 4 LPM from what i can find. but remember at 100% 02 you are getting 500% your normal volume of 02 per breath.

but i suspect most are closed systems now so a moot point, it comes out based on demand.

the average human breaths 12-20 breaths per minute with a volume of about .5L

either way they are designed so the person wearing it wont inhale cabin air when set to the 100% mode. only when using the normal mode will the air in the mask be mixed with cabin air

frankv

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#1835862 2-Aug-2017 16:24

Jase2985:

depends on what its set at, between 1 and 4 LPM from what i can find. but remember at 100% 02 you are getting 500% your normal volume of 02 per breath.

Actually, you're getting the same volume, but all of it is O2. I think you meant that you're getting 500% your normal number of oxygen molecules of O2 per breath.

If you're breathing pure oxygen and you aren't in a pressurised environment and you're at 25,000ft, then you're only getting 500% * 0.3bar = 150% more oxygen molecules than normal.

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