Low-pressure/high-O2 atmospheres

> The Apollo capsule ,at first, used low pressure -- nearly pure
> oxygen as I remember. Three astronauts and a capsule were lost in
> the fire.

No, that was in a full-pressure (14.7psi) pure-O2 atmosphere. In a
low-pressure O2 atmosphere, the risk of fire is less (though still
greater than it is in Earth-normal air).

Best,
- Joe

Joe Strout -- joe@...