Originally Posted by
VariablePitchP
I’ve spent half my life at 8,000 it feels like, can’t imagine the extra 2,000 taking me from totally fine to unconscious.
Did I say that?
I said 90 mins at 10,000 feet in the middle of the day used to make me very tired. Sometimes I’d be doing everything I could to stay awake. I was in my early 20s and very fit. Sweating, chucking bags, earlies, lates etc. it all adds up.
So 4 hours at night at FL110 would be a right pain. Especially as you age.
Yes there is a big difference between 8000ft and 10,000 feet. Which is why you need oxygen over 10,000 feet.
It’s also why so many airline Pilots fall asleep on the flight deck at high cabin alts during the circadian lows - and suffer immense fatigue doing long haul
flying. It’s also why the 787 is so good to fly.