Comments by "Zach B" (@zachb1706) on "Why NASA's Next Space Suits are not Pressurized to 14.7psi - Smarter Every Day 296" video.

  1. We did evolve with gravity. Our body wasn’t built for no gravity environments.
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  2. But there’s also health risks associated with living at low pressures and high oxygen concentrations for extended periods of time And it’s simply more comfortable.
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  3. Apollo 1 killed 3 astronauts and many of the other missions came very close. The reason Apollo was a success was it had a nearly limitless budget.
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  4.  @tubecated_development wow that’s interesting. Really shows how far suit technology has come. These astronauts are walking around with twice the PSI with almost no issue whilst that suit almost killed the user
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  5. When it comes to combustion, oxygen’s concentration matters more than its partial pressure. That’s why a pure oxygen environment is a fire risk even at 1/5th the pressure. I got this from “Oxygen Partial Pressure and Oxygen Concentration Flammability: Can They Be Correlated?", Journal of ASTM International, 2016
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  6. It would be disclosed with partner companies or organisations like Boeing, SpaceX, ESA, etc. It’s under lock and key so countries like Russia or China can’t steal it
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  7. This doesn’t require higher taxes, just less defence spending
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  8. What suits are they wearing? Is that the one NASA developed or the one by Axiom Space
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  9. That would be really cool.
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  10. The suit is the same pressure as the surroundings I believe. They’re launched in a suit as a precautionary measure after Soyuz 13
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  11. No not really
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  12. They talk in imperial because that’s what most viewers would understand best. The US should turn to metric though
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  13. Well we’ve had rovers on the moon for decades. Before the first humans in fact. Humans can simply do more in a shorter amount of time, and can do a wider range of experiments. Also this program is meant to be a precursor to a colony on mars. We will learn how to live, how to deal with the health effects of microgravity and build up equipment to do all that. Humans are integral
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  14. Because NASA still uses it. But for reference I believe 14.7 is Standard Atmospheric Pressure
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  15. When you don’t do something for 50 years, it takes a while to relearn how to do it. But this is less “how” and more about testing different configurations to find the best one.
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  16. The lunar suits are configurable to each person, the pressure is the same however
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  17. It takes into account both actually. I believe it has to do with the other gas molecules absorbing energy, it takes much more heat to start combustion. So pure oxygen is more flammable, and of course raising the partial pressure will increase flammability as well.
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  18. There’s a big difference between being in water and the moon. Much harder to move around in water
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  19. Now you have the issue of it being harder to move in and heavier.
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  20. What I heard online is it’s more comfortable and less dangerous to have them at the same pressure as on Earth. Orion I believe will be at or near Earth pressures
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  21.  @joedatuknow pacemakers don’t use radioactive batteries anymore, they use lithium batteries. Besides, no nuclear power source that’s safe to carry on a human would provide enough power for an exosuit.
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  22. There’s a lot of considerations. As Destin said it sounds like a waste of resources, in other words it means than you have to expend more energy to keep the suit inflated like that.
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