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Welcome to the 🎈 spreadsheet party where we try to build an exponentially growing renewable energy source, escape doom, win the Carbon XPRIZE, go to the Moon, build an equitable society and colour spaceships!🎈
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www.howtobuildaspaceship.com
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Please share your comments or request to join the party as an editor!
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This area is for fun math only:
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RING DESIGN
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centripetal acceleration
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a = v²/r
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a =9.81m/s²
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r =1000m
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v =99.0m/s
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max1rpm
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T =60seconds63.4seconds
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r =894.3m
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REFERENCE AREA
https://en.wikipedia.org/wiki/Artificial_gravity
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medium density housing area
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15101000m² floor area
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8homes800
m² green space
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24people
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nice park
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30,000
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HABITAT
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10,000people
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home629,353
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admin / commerce
629,353
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nature629,353
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food / materials
629,353
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2,517,4133,141,593
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3.14km²
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πkm²
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width500m
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radius1000m
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10,000,000,000people
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1,000,000habitats3141592653590
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3,141,593km²6283.185307
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2.11%
of continental earth
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thickness50m
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161,006,623
m³ of carbon fibre
v
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2000kg/m³
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322013246993kg
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322,013,247tonnes43,000,000,000
tonnes emitted in 2020
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equal mass as sacrificial rock for micro-metorites
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equal mass for biologicals, buildings, systems, infrastructure et cetera
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solar energy potential
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1.362 kW/m²
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carbonsilicon
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iron, aluminum for magnetic field generation
iron
aluminum
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nitrogenwaterhydrogenoxygen
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50μT 
phosphorus
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potassium
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10
μT for an induction cooktop
sulphur
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0.093kg
trace elements
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9,424,778
m² surface area
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1,570,796,327kg
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1,570,796
tonnes of iron, aluminum (50/50)
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glass
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cellulose
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ENERGY
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embodiedlaunch
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iron40MJ/kg30
MJ/kg to get into earth orbit
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carbon fibre200MJ/kg45
MJ/kg to get to moon?
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aluminum200MJ/kg2.38
km/s moon escape velocity
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glass20MJ/kg10
MJ/kg to get into moon orbit
2.8MJ/kg?
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solar collectors20MJ/kg
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MJ/kg [liquid] hydrogen
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HABITAT ENERGY REQUIREMENT
Totals1,000,000