Above what altitude is forced oxygen required (Ive found from 28,000'-47,000') and if the pax O2 bottles are considered as diluter masks what altitude are they good for?
Are the drop down maskes considered as 100% oxy, which would mean they're good for about 35,000' (according to a search I did)
I see the 777 quick donning mask provides 2.5mb of positive pressure @ FL400.
Further info on useful conciousness.
50,000' 6-9 sec
45,000' 9-15 sec
40,000' 15-20 sec
35,000' 30-60 sec
30,000' 1-3 min
25,000' 3-5 min
22,000' 5-10 min
18,000' 20-30 min
15,000' 30 or more mins
Cheers CCA
Last edited by CCA; 18th May 2006 at 09:41.