25 - Mars Reusable Vehicle: Project Charon With the focus of the international space community shifting to the sustained human ex- ploration of Mars, a tangible need for a vehicle that would facilitate continuous access from a Martian base to a low Martian parking orbit emerges. Such a vehicle could stimulate the growth of a Martian colony, thus advancing human exploration of space. The market for such a vehicle was carefully analysed and potential competitors were estab- lished to ensure that the client, Airbus Defence and Space, can become a dominant driver in this emerging market. Mission Objective Project Charon has the goal of designing an economical, sustainable, and reusable vehicle to provide a continuous transportation service for both crew and cargo, between a Low Martian Orbit node and a Mars base, from 2040 onward, in a time frame of 10 weeks by 11 enthusiastic students. System Design From the very beginning of the project, exten- sive use of Systems Engineering was applied to the design process, as a tool to come up with the most economical, sustainable, and ef- fective design option to meet the intended goal. Various design options, also including less con- ventional ones such as a space elevator and a space plane, were considered. After a thorough trade-off process, a single-stage reusable vehi- cle design emerged as best. The latter was then analysed in detail, to guar- antee that every single requirement developed in the initial phase and set by the stakeholder was met, and to safeguard crew safety and cargo integrity at all costs during all mission profiles, including off-nominal conditions. To do so, several subsystems were defined and de- signed, ranging from the structures, propulsion elements of the vehicle, and ground operations, to guidance, navigation, control, human inter- faces, abort system and more. Finally, all sub- systems were integrated together, leading to the final layout of the vehicle, as shown in the figure. With the preliminary design now frozen, the emphasis of the upcoming weeks will be on polishing the final design report, creating ren- derings of the final preliminary design of the vehicle, and preparing the symposium and fi- nal presentation. Delft University of Technology Design Synthesis Exercise 2020