Originally Posted by
galaxy flyer
Diluted Demand masks are airline standard; the reason is just to get down from a RD or give temporary protection from smoke. It isn't a military style system.
Depends on the airline or operator, but a distinct minority. In fact, the latest physiological training is done on a desktop sim where you breathe a reduced oxygenated mask to get hypoxia. Nothing like the old chamber rides to F410 and very rapid decompression.
It probably about 40 knots, but I don't fly the T-7
GF
I've taken it to the top of the envelope, where the FMS says is the max, several times to get above chop. The window is typically only about 10-20kts between the amber slow band, and the over-speed band, at 410. Our limitation says the ceiling is 43,100, but I've not been light enough, even after 17 hours flying and burning off 300,000lbs. to get up there even with only 20,000lbs. fuel remaining.
I don't know what the pax/cargo load was on MH370, they might have been light enough to get up there, (450) but with 7-8hrs. fuel remaining, I doubt it. I see about 16,000/hr. burn average, so 7 hrs. worth would be 112,000lbs fuel on board when they went missing. Too heavy for higher than about 370 with the pax load they had.
I don't know how many lbs. of cargo they had, but we do know they had some lithium batteries as cargo.