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A. Mars Design Reference Architecture 5.0 Baseline, 5x SLS Launches The crewed chemical propulsion architecture for the DRA-5 mission consists of a multiple-stage vehicle that is assembled in LEO over a period of 120 days.1 The individual modules are placed into orbit by five Ares V launches, with the crew delivered shortly before departure by an Ares I launch. The assembled crewed system architecture is shown in Figure 2. The MTV masses 486 tons when departing LEO. Because of the long assembly time, an additional module for reboosting during this process must be launched, bringing the total mass that must be placed into orbit to 534.5 tons. A summary of the vehicle is found in Table III-1, and a summary of the launch manifests in Table III-2. Table III-1: DRA-5 Baseline Vehicle Summary1 Table III-2: DRA-5 Baseline Launch Manifests1 Figure 7: Baseline chemical propulsion Mars transportation system crewed architecture from the Mars DRA-5.1 Vehicle Element Number of Modules Mass (t) TMI Stage 1 Mbo (Module) 15.1 M prop (Module) 91.1 RCS (Module) 2.3 Total Module Mass 108.5 2.0 Total Stage Mass M prop (Module) 217.0 TMI Stage 2 Mbo (Module) 15.1 91.1 RCS (Module) 2.3 Total Module Mass 108.5 Number of Modules 1.0 Total Stage Mass 108.5 MOI Stage Mbo 10.3 M prop 50.2 RCS 5.3 Total Stage Mass 65.8 TEI Stage Mbo 11.4 M prop RCS 24.1 7.3 Total Stage Mass 42.7 Payload Transit Habitat 41.3 CM+Crew 10.6 Total Vehicle Mass 486.0 Launch Manifest Mass (t) SLS Block 2 1 Transit Hab, CEV, Reboost Module 99.9 2 MOI & TEI Stages 108.5 3 TMI Module 1a 108.5 4 TMI Module 1b 108.5 5 TMI Module 1c 108.5 F9 1 6 crew 0.6 Total Mass to Orbit 534.5 13 American Institute of Aeronautics and Astronautics Downloaded by NASA LANGLEY RESEARCH CENTRE on January 30, 2018 | http://arc.aiaa.org | DOI: 10.2514/6.2018-1537PDF Image | Water Electrolysis for Propulsion of a Crewed Mars
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