Based on components already in existence this manual details a reference design for an
interplanetary spacecraft that is simple durable fully reusable and comprised mostly of
water. Using such an accessible material leads to a spacecraft architecture that is radically
simpler safer and cheaper than conventional capsule based designs. If developed the potential
affordability of the design will substantially open all of the inner solar system to human
exploration. A spacecraft that is comprised mostly of water will be much more like a living
cell or a terrarium than a conventional rocket and capsule design. It will use water for many
purposes before it is superheated in electric engines for propulsion purposes which include
radiation shielding heat management basic life support crew consumption and comfort. The
authors coined the term spacecoaches to describe them as an allusion to the Prairie Schooners
of the Old West which were simple rugged and could live off the land.
