mrtravel wrote:

Newps wrote:

The oxygen for the passengers is not stored in oxygen form in bottles.
Remember the Valujet that crashed in Florida? It crashed when some
oxygen generators caught fire and burned the plane up. When needed
oxygen is made by mixing some chemicals. It's tremendously lighter.

Lighter? Is oxygen heavy?

It's heavier than air. But he meant it's lighter to use oxygen generating
cans than to store oxygen as pressurised gas in ( heavy ) oxy bottles.

Graham