6.12 It is convenient to have agricultural areas at the same pseudogravity level throughout to avoid pumping water uphill and raising and lowering food items. Therefore, the ES group set aside the cylindrical section for agriculture. The area of this section is given by: (Cylindrical area) = 2TI¾ulllhull Using controlled agriculture, it is possible to feed a human being from 3Bm 2 of agricultural area (see Section VI.11.6). Therefore: For a population of 1000, (Population) (38) 2 TI¾ull lhull = 60m (Actually, the figure should be slightly larger since the 3Bm 2 /person figure does not allow for walkways and storage areas.) The ES group therefore decided that: lhull = 100 meters (Colony population) = 1000 allowing a respectable margin in agricultural area. Since the colony would be in the low-gravity manufacturing business, the ES group allocated the hull areas near the spin axis to workshops. This left the higher-g areas in the endcaps for housing. The Fabrication and Test (FT) Group could see no rea~on why the heavy equipment for the manufacture of SSPS's should be within the colony itself. To minimize vibration, angular momentum variations due to massive rotating machinery,and safety hazards (such as broken parts flying about and toxic gases from chemical processes), the ES group decided to put the heavy equipment outside the colony in zero-g. Only light manufacture and equipment necessary to the operation of the colony would be inside. Figure 6.6 shows the hull configuration at this point in the design process.
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