Kalpana One design (was Rotating space colonies)

Your right, Victor. I picked up on an older thread from 2007 since it
was the only one I could find on this subject and since Kalpana One is,
as far as I know, the most recent study done on rotating space colonies.

The design basis for Kalpana One is a population of 3000. This 2006
study (revised in 2007 to correct an error related to rotational
stability) can be found here:

http://www.nss.org/settlement/space/2007KalpanaOne.pdf

The study addressed various considerations to arrive at what was felt by
the study group to be the most economical form for a space colony
supporting a population of 3000. They concluded that a cylinder with a
radius of ~250 meters (at the ground level of the main living quarters),
a length of 325 meters and a rotational rate of 2 rpm to provide 1g
artificial gravity would be most economical and practical.

An earlier 1977 study went in to greater detail concerning design
criteria for space colonies configured for populations of 100, 10,000
and 10^6. This NASA Ames Research Center study can be found here:

http://space.alglobus.net/spaceres/index.html

Section II-1 of this study addresses physical design criteria for these
various sized colonies. The area required per person for a 100 person
station would be ~79 m^2 according to the study group. This requirement
doesn't provide any area for agriculture, animals, or food processing.
For this reason I prefer to use the more generous allocation of ~157 m^2
per person for colonies of 10,000 which provides for these activities.

Assuming that a torus design is preferred for a small colony of ~100
population, the minimum radius for a 1g habitat floor level at 2 rpm is
actually 223.4 meters. [r=(9.8 m/sec^2)(900 sec^2)/4pi^2]

If a torus tube interior diameter of 15 meters is used as the width of
the habitable floor area then the space allocation of 157 m^2 per person
allows for a population of 134 [(446.8 m)(pi)(15 m)]. This is likely the
minimum sized "working" permanent space colony which can accomodate a
small transient population either outward bound for other destinations
or returning to Earth.

It's assumed that a colony of this type will have some economic base to
sustain itself. It may serve as a transportation hub (servicing
spaceships and providing a "rest stop" for their crews) or, perhaps,
serving as a base for construction personnel working on solar power
satellites.

Any thoughts on this scenario?

Chris

--- In spacesettlers@yahoogroups.com, "Victor Smith"
>
>... In this thread we're discussing ways to get a Human rated habitat,
rotating in some manner to provide weight for long term habitation, up
and in operation quickly and, to the extent possible, inexpensively. I
don't see the nested cylinders as fitting this scenario....