All Questions
Tagged with spacesuitsoxygen
9 questions
25votes
2answers
6kviews
Why aren't spacecraft and spacesuits pressurised to 2.5 psi (17 kPa) of pure oxygen?
Today 1 atm (101.3 kPa, 14.7 psi) with sea level composition is most commonly used on spacecraft to avoid fire hazards like in Apollo 1 (not that it would have helped the Apollo 1 crew as they couldn'...
user46063
4votes
1answer
206views
Experience of breathing regular air vs. Nitrox vs pure oxygen at 4.3 psi?
Has any astronaut/cosmonaut described a difference in the feeling of breathing pure oxygen at 4.3 psi in a spacesuit compared breathing regular air at sea level or even to Nitrox used in the Neutral ...
- 7,239
4votes
1answer
554views
Did the Space Shuttle crew have to worry about monatomic oxygen?
Comments below this answer tell us that the Space Shuttle always remained in Earth's atmosphere. When it visited the Hubble Space Telescope or the ISS or Mir it was still in the thermosphere and ...
- 153k
14votes
1answer
1kviews
How does it feel to breathe 100% oxygen at low pressure?
Some space suits are designed to provide an atmosphere of 100% oxygen but at a reduced air pressure about 20% that of sea level. Is breathing in such a suit uncomfortable? It seems like having such a ...
- 523
3votes
1answer
1kviews
What would it feel like for an astronaut if his/her spacesuit ran out of air?
I’m curious what it would feel like if an astronaut’s spacesuit ran out of air while they were on mars, vs taking the suit off? inspired this question
1vote
1answer
282views
Conditions on Titan under which human breath can be set to fire
Motivated by the question Titan vs Mars for colonization, I wonder what exactly happens if human exhalation products are released into Titanian atmosphere and, say, a spark igniter happens to be ...
- 5,535
2votes
1answer
382views
Can the ISS's NORS tanks be used to recharge spacesuit or spacecraft oxygen supplies?
In this answer I said: In an emergency a pressurized tank of oxygen gas can be an immediate source of oxygen to pressurize the station, and (possibly) other thinks such as tanks for suits. But for a ...
- 153k
14votes
2answers
5kviews
Why is the EMU space suit pressurized to 4.3 psi specifically?
Wikipedia claims that space suits that use pure oxygen are pressurized to 4.7 psi, instead of 3.0 psi, to account for carbon dioxide and water vapor pressure as per the alveolar gas equation (although ...
- 865
4votes
1answer
126views
Can PLSS in atmosphere use enriched oxygen?
Does Mars space suit have to be pressurized? makes it pretty clear the atmospheric pressure on Mars is a miniscule fraction of Earth's own. In it's turn Wikipedia writes to say that the atmosphere ...
- 13.7k
