The core section of the Daedalus vehicle was the use of a slender structural spine, from which all the other components could be attached. The use of this spine was possible due to the low vehicle acceleration levels and assembly in space.
During the design work, several spine types were investigated. With maximum torsional (twisting) stiffness and minimal buckling being one of the major engineering requirements, a triangulated structure was chosen for the Daedalus vehicle.
Along the spine were several core parts. For the first stage, it was divided into two sections, the engine bay and the service bay, which included all facilities and propellant tanks. The second stage also had these sections but included the science payload bay.
Daedalus has a structure mass of 2,670 tons being propelled by 50,000 tons of deuterium and helium-3. In total, the Daedalus spacecraft would begin its interstellar journey the approximate mass of a medium-sized oil tanker. At a length of nearly 200 meters it is nearly twice the height of the Saturn V rocket that took men to the moon in the 1960s.