................ l, 480 Life support ..................... 550 Life support ............. 400 Miscellaneous systems ............... 500 Contingency (5 percent) ............... 1, Total mass ........... 4, 390 3. 3.2. Earth-orbit-to-lunar-surface Ferry Vehicle .......... 53 3. 3.2. Lunar Cargo Shuttle. The lunar landing stages described previously, impulse
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