On Mon, 14 Apr 2008 07:51:08 -0700 (PDT), Crown-Horned Snorkack
<chornedsnorkack@[EMAIL PROTECTED]
> wrote:
>On 14 apr, 13:33, Leonard Erickson <sha...@[EMAIL PROTECTED]
> wrote:
>> On Mon, 14 Apr 2008 07:45:07 GMT, Bryan Derksen
>>
>> This will be tedious but doable. Very tedious as the rock is likely to
>> be basalt and that stuff is pretty tough. Not like granite, but not
>> fun either.
>>
>Which is why natural lava caves are not so good idea. They are likely
>to be hard rock.
>
>Pick regolith instead. It seems to bear some resemblance to soft
>sandstone, tuff or loess. Slightly indurated, so that it will sup****t
>holes excavated in it, and cave ceilings can stand without props, but
>also soft and fragile enough that it crumbles under pickaxe blows.
It's a major hazard though in that it's really hard to keep it outside
(though the flyer won't pick any up coming in so that's a maybe. It's
not healthy for long term exposure. Hard on equipment too.
>> Looks like the best bet may be the old "buried quonset hut" with a
>> pressure tight liner.
>>
>> Framerwork pieces should be easy to carry. A bit harder to assemble
>> (note: erect sunshade so they don't expand too much, but reflect
>> enough light that they don't shrink too much either.)
>>
>> Attaching the corrugated tin (or whatever) cover panels won't be too
>> bad either. Burying it will be a pain. Probably best to find a small
>> "valley" or something so you don't have to excavate and *then* bury.
>> Just bury.
>>
>Do not bury at all. Just excavate.
>
>The im****tant part is leaving a roof which will sup****t its weight -
>and which will not be lifted out of place when the interior is
>pressurized.
>
>1 atm matches the weight of 60 m water in the feeble gravity of the
>Moon, or of 20 m solid rock, or considerably thicker layer of
>regolith.
Except you *have* to bury it under a minimum of several meters both
for thermal control and for radiation ****elding. If you don't, a solar
flare will ruin a lot of things and be fatal to anybody who is there
at the time (or than the flyer)
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