Malaysian Airlines MH370 contact lost

[mickjoebill]

Passenger O2 supply endurance

For those who consider hypoxia in their theory.
According to google:
Some 777s have chemical O2 generators.
Chemical Oxygen generators on 777 last 22 minutes once they are activated.
There are approx 170 generators on 777. (3 generators per seat row?)
The chemical reaction commences when passengers pull down on the masks after the masks have been deployed from the ceiling. So one generator does a few masks. Supply is not regulated and will be exhausted after 22 minutes even if only one mask is in use.
There are at least 10 sets of portable oxygen cylinders with 15 min endurance, for cabin crew use.
Flight crew oxygen is independent and has 2 hour endurance.


Therefore in theory it is possible for cabin crew or passengers to survive for an extended period by moving from an expired supply to one that has not been activated and so on. With luck there would be a few spare in business and first class. In economy where passengers tend to spread-out into empty rows. it is probable that all generators would be activated shortly after being deployed.

However if the O2 supply for the flight crew is as stated it is unlikely anyone in the back would have the fortune to successfully swing from one supply to the next for two hours.

Confirmation that the above applies to MH370 anyone..?

Whilst on the subject, do all newer aircraft have bottled air supply for passengers? If so is it regulated somehow, lasting longer if in use by fewer passengers?
Do the loos in 777s each have a individual generator?



Mickjoebill