>>96162108>Metal is easy to transport, it doesn’t require oxygen or food or water,for one year of survival, humans require:
> ~250kg of food> ~146,000L of oxygen (208 kg)> ~1,450L of water (1,450 kg)presumably, a spaceship has low-loss recycling systems for oxygen and water, so these numbers might be more than 10 times higher than what is actually necessary - but between these three items, personal effects, overhead, and the weight of the human itself, the whole package might weigh 2 metric tons.
if we assume that an Atlas' mechbay is 20m*10m*10m, that's 2,000m3, or 2,000,000 liters. That volume, at regular room pressure, could hold enough pure oxygen and water and food for ~13 man-years with no recycling.
But: that's at 15 PSI. Oxygen tanks are filled at around 2,200 PSI. So, crew members only need 1,000L of compressed O2 / year.
>2,000,000 liters>divided by (1,000L O2 + 1450L water)The single mechbay can contain water and air for 816 man-years, at a ballpark weight of 2,000 tons.