Originally Posted by
cavuman1
I have the horrible premonition of an Apollo 1-like catastrophe developing. .......We of a certain age remember Virgil "Gus" Grissom's concern over communications glitches in the capsule which had been built by a consortium comprising North American Aviation, Boeing, McDonnell-Douglas, and Grumman. He called it a lemon! Did too many cooks spoil the broth and kill 3 of America's top astronauts?
The flaw was pressurising the capsule with 100% O2 at ambient pressure. IIRC, the capsule would have a pure O2 atmosphere in flight however the pressure would be low to allow lightweight construction while delivering an acceptable partial pressure of O2 equal to that found at sea level. The ISS has a normal 14.7 psi mix of oxygen and nitrogen. I'm not sure about Artemis but would expect it to be the same.