The assumptions used for fleet sizing are divided into three groups as follows: Shuttle and Tug Performance • 65K lb Shuttle capability to 190 n mi orbit • 36. 8K Tug payload capability from 190 to 7000 n mi • 23 Shuttle flts/yr for each Shuttle vehicle • 23 Tug flts/yr for each Tug vehicle Support Equipment • Each manufacturing module processes 420 Ib/hr • Manufacturing modules operate 24 hr/day • Remote manipulator modules (RMM) assembles at 26 Ib/man-hour • One ground controller for each RMM • Each ground controller works 155 mhr/month • RMM’s are used three shifts/day • RMM’s require 5% consumables for each 1 lb moved Crew Requirements 7000 N Mi site • Six men needed in 7000 n mi orbit for 1 yr • Crew change every 180 days at high altitude site 190 N Mi site • Shuttle crew quarters • Six men • 30-day missions Figure 3.5-5 and 3.5-6 present a detailed breakdown by assembly phase (see Fig. 3.5-7) of the number of Shuttles used during each phase of assembly for Flight Plan 1 (1 year assembly 190 n mi), and Flight Plan 3 (2 year assembly at 190 n mi). Also listed are the approximate assembly times based on the material delivery and manufacturing assumptions. Both of these flight plans have assumed that a separate solar array is available to power the SEPS during the trip to geosynchronous orbit. An investigation of the
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