25. The first space manufacturing facility weighs 70 t, and includes chemical refining equipment, a machining and assembly facility, and habitat [28], Later copies of this facility do not include the habitat, so the mass of each is 58 t, 26. The lunar manufacturing facility and space manufacturing facility arrive in one piece, and are ready for use without local human intervention. Both are completely self-repairing. 27. In addition to noted equipment, the manufacturing facilities include necessary trucks, robots, teleoperators, computers, and docking facilities. 28. The throughput of the manufacturing facilities is 40 times the mass of their chemical processing facilities per year [29], This mass is different from the mass launched by the lunar manufacturing facility. 29. Both types of manufacturing facilities produce a new generation in 3 months [30], The number of copies of the manufacturing facilities including the original thus doubles every 3 months. The mass of the material used in producing a new copy of the manufacturing facilities which is required from earth is 10% of the mass of the new copy [31]. 30. In the S.S.I. plan, it was stated that the completed space manufacturing facility has throughput 3xl05 t/yr., for which 7 doublings would be required, or 2^ = 128 copies, including the original [32], However, the throughput of a chemical processing facility was assumed to be 40 times its mass per year in S.S.I., which would require each chemical processing facility to have mass which is inconsistent with the 29 t mass given in S.S.I [33], Alternatively, if it were assumed that the correct number of copies is 128, the chemical processing plant would be required to process its mass per year, inconsistent with the stated throughput capability of 40 times its mass per year. To determine the ratio of the mass of throughput used in S.S.I. for the lunar chemical processing facility for comparison, note that its mass is 6 t, and it has a throughput of 60 t in 3 months, [34] or
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