Time of useful consciousness would be another interesting number to add. Here's a table of average times published by the FAA for a gradual ascent: - 18,000 ft

Time of useful consciousness would be another interesting number to add. Here's a table of average times published by the FAA for a gradual ascent: - 18,000 ft; 5,500 m: 20-30 min - 22,000 ft; 6,700 m: 10 min - 25,000 ft; 7,600 m: 3-5 min - 28,000 ft; 8,550 m: 2.5-3 min - 30,000 ft; 9,150 m: 1-2 min - 35,000 ft; 10,650 m: 30-60 sec - 40,000 ft; 12,200 m: 15-20 sec - 43,000 ft; 13,100 m: 9-12 sec - 50,000 ft; 15,250 m: 8-10 sec Here's a demonstration of the effects of hypoxia and time of useful consciousness done in a hyperbaric chamber by SmarterEveryDay: https://www.youtube.com/watch?v=kUfF2MTnqAw https://www.youtube.com/watch?v=kUfF2MTnqAw [1]: https://en.wikipedia.org/wiki/Time_of_useful_consciousness https://en.wikipedia.org/wiki/Time_of_useful_consciousness