Re: Is it this easy to live on Mars?

A sphere filled with 78% nitrogen and 21% oxygen and 0.03% CO2 and
0.97% water - 1,120 meters in diameter sunk into the Venusian
atmosphere would have over 51 million tons of buoyancy!!!

So, if the fused silica shell were only 5 meters thick overall, it
would mass only 50 million tons, and the shell, with its contents
would be neutrally buoyant!

Compressive strength of fused quartz is greater than 1.1 gigapascals.
So t is given by

t = pr / 2 sigma = 9.3 Mpa * 1120 / (2 * 1.1 Gpa)
= 4.73 m

I used 10 m before because that gave me a reasonable safety factor -
in case of quakes and whatnot. But 4.7 m is LESS than 5 m - which
allows me to build a FLOATING city from surface materials. (solid
fused quartz vapor deposited on carbon forms producing one 1700 tonne
unit every 10 minutes - or 850 tonne unit at the thinner size - with a
4 GW power source - one unit is produced every 5 minutres! So, six
months to complete each sphere)

So, as the sphere is jacked up from the surface, and floors are put
in, Venusian atmosphere is pumped out, and Earth normal air is pumped
in. Refrigeration units are operated and the number of jacks are far
less as the system grows in size. The interior is immediately
habitable and may be outfitted and used as a command center for the
project.
.

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