Leonard Erickson wrote:
> So first need is some sort of relatively cheap, easy to obtain
> container that can hold a 1 bar pressure difference.
>
> Any chance that any of the amo cases or the like you can find at gun
> shows might work?
A pressure cooker is the first thing that comes to mind.
http://en.wikipedia.org/wiki/Pressure_cooker
says most standard pressure
cookers sold in the US can hold a one-atmosphere difference and there's
probably a goodly safety margin there.
> Second, suggestions on how to build a shelter to even out temp
> differences. Assume no parts bigger than a standard sheet of plywood
> or heavier than a couple of hundred kilos.
Bring a shovel and dig a deep hole. Or carve a cave into the base of a
cliff face - you probably won't even need tools for that, just keep
repeatedly flying at high speed into it and chisel it out with your
invulnerable head. :) This will have the added benefit of providing
radiation protection, too.
You may be able to find ready-made caves, evidence of lava tubes has
been found in photos from orbit. Also, if a constant _cold_ temperature
is okay, there are the shadowed craters at the poles.
> Third, cheap pressure suit for any visitors she might haul up there.
Much, much harder, as pointed out elsewhere in the thread. But if all
you want to do is store someone up there, without letting them wander
around on the surface, there are probably easier ways.
With a weight limit of a couple of hundred kilos you won't be able to
bring up much of a pressurized habitat module in one trip. You could
perhaps haul up a big propane tank, but something like that would be
really claustrophobic - I'd have to _really really_ trust the super to
be left in something like that.
Instead, I'd focus on enhancing the cave idea I mentioned earlier. If
you dig a cave in suitably hard rock, it should be able to hold
pressure. You'll just need to add a door. That's still going to be
pretty hard, a door and surrounding steel doorframe capable of holding
that pressure won't come cheap and won't be easy to install. Keep it as
small as possible, a hatch just big enough to crawl through.
Anchoring your hatch's steel wall to the rock will require some holes to
be drilled; pneumatic tools should work fine on the Moon, though you'll
need to fly all the way back to Earth to replenish the pressurized air
so super-powered hand tools might be better.
http://www.iht.com/articles/1992/02/13/moon.php
had some tantalizing
suggestions about the possibility of making concrete on the Moon and
setting it in a vacuum. Not sure how well it'll work with regular
commercial stuff. Concrete would be good for sealing up the gaps around
the edges of the door frame. Failing that, perhaps use a gas torch to
solder the edges with something meltable?
If you use pure oxygen to fill the habitat you'll have much less than a
full atmosphere of pressure, so that'll help ease the stress on your
door too.
An airlock will probably be needed; if the super isn't super-strong he
won't be able to open the hatch against atmospheric pressure, and the
super needs to be able to get in and out without blowing all the air and
killing the visitor in the process. This should be just a matter of
installing a second hatch and putting valves in them to allow pressures
to be equalized.
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