VI.l: INTRODUCTION 6.1 CHAPTER VI SYSTEMS This chapter describes the hardware which the study group considered in order to meet the environmental needs stated in Chapter V. The study group's design process is presented step by step, as it happened, leading to the final configuration presented in Chapter III. This section emphasizes general configurations and systems, and represents mostly the work of the Environments and Systems Group. Specific issues involving structures are covered in Chapter VII; those involving fabrication and testing appear in Chapter VIII. VI.2: DESIGN METHOD Since the members of the study group had 14 weeks to produce and evaluate a design, the Environment and Systems (ES) Group therefore set about turning out a first configuration quickly so that the study group would have something to work on. The design could be revised later should major technical problems come to the surface. On the other hand, the ES group anticipated that there would be little time for iteration and therefore tried to pick a first configuration with some promise. Section VI.3: THE FIRST HULL describes the design process leading to the first hull configuration. Section VI.4: SHIELDING, SUNLIGHT, AND WINDOWS presents the issues leading to the first shield and window designs. Section VI.5: THE PRECESSION/NUTATION PROBLEM explains the difficult problem of keeping the hull and shield apart, proposes a solution, and describes the first docking system. The first overall configuration is presented in Section VI.6. Sections VI.7: AIR COMPOSITION AND PRESSURE and VI.8: ENERGY FLOW IN THE FIRST CONFIGURATION deal with issues contributing to dissatisfaction with the first overall design, leading to Section VI.9: CONFIGURATION CHANGE, which details reasons for the change
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