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Stanford Torus Launch



 
 
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Old July 21st 11, 03:30 PM posted to sci.space.policy
William Mook[_2_]
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Default Stanford Torus Launch

Consider the Stanford Torus

http://en.wikipedia.org/wiki/File:In...ford_torus.jpg
http://en.wikipedia.org/wiki/File:St...nstruction.jpg
http://en.wikipedia.org/wiki/File:St...C7 6-0525.jpg
http://www.nss.org/settlement/nasa/7.../5appendA.html

This is a 163,700 tonne structure - and carries 539,000 tonnes of
internal material - with 65 meter small radius and an 830 meter large
radius. Without the soil and water (which will be obtained at
Ceres) internal material is reduced to 268,000 tonnes reducing the
total mass to 440,700 tonnes.

This is comparable to what we build today in shipyards around the
world.

The glass windows and certain other material is not included in this
design since we're using fusion power generators to operate sun lamps
and provide power. We're also using fusion powered rockets with
exhaust velocities of 33,000 km/sec to lift the ships into space.

With water and soil: 702,700 tonnes
W/o water and soil: 440,700 tonnes (added later)

Population: 140,000


1,000,000 metric tons of force require a mass flow rate of 297.6 kg
per second with an exhaust velocity of 33,000 km/sec. With 1,000
thrust 'cells' located on the torus and hub - operating together, each
reacting up to 0.3 kg to provide controlled thrust across the torus,
the torus is lifted after construction. The torus is built on the
ground, the same way a particle accelerator vacuum chamber is made.
It is then lifted into the sky and flies to orbit, or any other
destination in the solar system.

212.91 metric tons of lithium-6 deuteride is needed to place the
larger of these into orbit.
425.75 metric tons is needed to lift this off Earth and land it on the
Moon.

3,092.82 metric tons is needed to accelerate the smaller ring to 116
km/sec and then slow it back to zero relative to its destination.
This allows it to move in nearly straight lines traveling 10 million
km in a day. It takes 3 hours and 20 minutes of thrust to reach this
speed, and stop at the desired point.

Four ships leaving Earth each day would cause a decline in our
population.

http://maps.google.com/maps?ll=-46.5...611,168.383611

The plant at Tiawa Point can produce two of these units per year. The
output is limited by the power. The world's aluminum production can
increase 8x from 30 million tons per year to 240 million tons per year
from existing plants and mines, with increased energy made at lower
cost.

With vastly lower cost energy the total cost per station would be
around $334 million - $2,385.71 per person.

The world could be depopulated for $16.7 trillion.

Less than the cost of the $27 trillion spent since 2007 to fix the
banks.

Less than the $1.5 Quadrillion in BAD DEBT entered into by the banks.

Here's the distribution of population;

Planet billions

Mercury - at L2 200
Venus - at L2 200
Earth Orbit - 1,953
Moon - on surface 784
Mars - on surface 784

Asteroid peta-t billions

Ceres 943.0 1,886
Vesta 267.0 534
Pallas 211.0 422
Hygiea 88.5 177
Interamnia 39.0 78
Davida 38.4 77
Eunomia 31.2 62
Juno 26.7 53
Herculina 22.9 46
Psyche 21.9 44

Schedule of Masses
Internal
Soil 220000
Water 42000
people 9600
animals 900
plants 5000
Structures 77000
substructures 15000
furniture 20000
machinery 40000
utilities 29500
Misc 80000
Total 539000

Structure

Torus Shell 156000
Spokes 2400
Central Hub 1600
Docking 100
Fabrication 500
Radiators 2400
Power Station 700
Total 163700
 




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