9. 37 the final year, 50 people are transported to the colony for its internal completion, and,as a proof test,live off of the internal ecosystem. This final work crew lives in the colony throughout the entire last year. With the completion of the structural assembly in year 15, the TLA is no longer needed, and if kept operational, its costs may no longer be assigned to the prototype colony project. Similarly, project costs do not include transport costs for the actual colonists. A summary of the program scheduling can be seen in Figure 9.10. Table 9.4 gives a year-by-year breakdown of cargo and personnel flows. IX . 4: TRANSPORT SCHEDULING The yearly flight scheduling of transport vehicles may be easily done, using the personnel and cargo flows summarized in Table 9.4. The passenger version of the OTV and the LLV each carry 50 people, and the yearly personnel flow to a destination determines the number of passenger vehicles per year. A passenger OTV carries 27.5 tons of cargo outbound, and a passenger LLV carries 11 tons of cargo, so these cargo masses are subtracted from the yearly mass flows to each destination, and the remaining mass flow used to determine number of cargo vehicles per year to each destination. This directly determines the number of OTVs to L-5 each year, and the number of LLVs to the lunar surface. Since one LLV is fully serviced by the payload of one OTV, the numbe~ of LLVs per year is the same as the number of OTVs to lunar orbit each year. This determines the total number of OTV flights each year. Each OTV flight requires 4 space shuttle and 4 DOL flights, thus determining the use rate for the earth launch systems. The results of this transport scheduling are shown in Table 9.5. IX.5: PROGRAM COST R~TIONALE At this point, one can define conventions for costing all the program items. In reiteration of the costing procedures outlined earlier, the research and development of all flight vehicles (DOL, OTV, LLV, and ILTV) is costed at a standard rate of $24,000 per
RkJQdWJsaXNoZXIy MTU5NjU0Mg==