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ISS atmosphere tries to be similar to earth's - 101kPa, about 20% O2. https://en.wikipedia.org/wiki/ISS_ECLSS https://en.wikipedia.org/wiki/ISS_ECLSS
by oddeyed 11y ago
ISS atmosphere tries to be similar to earth's - 101kPa, about 20% O2.
https://en.wikipedia.org/wiki/ISS_ECLSS https://en.wikipedia.org/wiki/ISS_ECLSS
- david-given 11y agoThat's only a partial pressure of 20 kPa of oxygen. The Apollo capsule was supposed to be 20 kPa of pure oxygen, so providing the same partial pressure, but because they were on the ground they couldn't do that or the spacecraft would be crushed by exterior atmospheric pressure (<tangent> https://www.youtube.com/watch?v=O4RLOo6bchU https://www.youtube.com/watch?v=O4RLOo6bchU </tangent>). So instead they pressurised it to one atmosphere. Of pure oxygen, thus providing a partial pressure of 110 kPa of oxygen...