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« on: March 11, 2012, 12:41:54 pm »
It depends on how hard it would be to repower the elevator, and make a scuba-like system. I doubt anyone will have scuba like systems because that wouldn't be very usefull in the apocolypse.
Another reason we need potassium-nitrate. So this Dutch guy, Cornelis Drebbel, made a submarine, and this is how he kept his men breathing:"To re-oxygenate the air inside one or more of these submarines, he likely generated oxygen by heating nitre (potassium nitrate or sodium nitrate) in a metal pan to make it emit oxygen. That would also turn the nitrate into sodium or potassium oxide or hydroxide, which would tend to absorb carbon dioxide from the air around. That may explain how Drebbel's men were not affected by carbon dioxide build-up as much as would be expected. If so, he accidentally made a crude rebreather nearly three centuries before Fluess and Davis.[9] Drebbel had been taught by the alchemist Michael Sendivogius (1566–1636) (perhaps when both were at the court of Rudolf II) that warming nitre produced oxygen.[10]"
Now this is just copy pasted from Wikipedia, but they got good sources, that I checked, and it seems legit. So we could just skip gun powder if we get Potassium-nitrate, it would allow us to go back down into the bunker. You could just make a large tank, with just air inside, that is burning Potassium nitrate, or sodium nitrate, and have pipes feeding that air into a mask that is wrapped around a person's face. Wouldn't need pumps or any fancy compression mechanisms, so we could go down much sooner. Both of those minerals are fairly common in our area, with Sodium nitrate being called Chile Saltpeter or Peru Saltpeter because both countries had extensive deposits. Mostly because it is water soluable, so it is found in chile's large attachama desert, which is the driest place on the planet.
But since we are in an area that used to be the amazon rainforest, in brazil, and the coast is 8 weeks away, we are proabably closer to Peru. If the coast is so far away, even by vechile, we must be in the west of brazil, so a trip to Peru shouldn't be as long as a trip to the coast. Unless we are in the interior of the country, in which case it will take much longer. But regardless someone must have at least small quantities of these chemicals on them near us, because they can be used in the manufacture of explosives as an oxidizer.
(I found all this out when I checked self contained breathing aperatus, not SCUBA, which is the underwater version.)
Oh and although this is a low-tech option for accessing the bunker we would need large quentities of Sodium or Potassium Nitrate, as we would have to burn it the entire time we are in the bunker. These materials would also be somewhat expensive, not expensive but not cheap either, as they would be used in explosives.