Project Icarus is an ambitious five-year study into launching an unmanned spacecraft to an interstellar destination. Headed by the Tau Zero Foundation and British Interplanetary Society, a non-profit group of scientists dedicated to interstellar spaceflight, Icarus is working to develop a spacecraft that can travel to a nearby star.
In Part 1 of this two-part article, Kelvin Long, Design Lead for the Project Icarus Vehicle Configuration, describes the design constraints that were placed on the original Project Daedalus interstellar spacecraft.
WIDE ANGLE: Project Icarus: Reaching for Interstellar Space
One of the most exciting parts of Project Icarus which is on everyone's mind with an interest in the project, is what will the spacecraft look like? Will it be very similar to the Daedalus design or radically different?
Before we address the design of the Icarus spacecraft, let us remind ourselves about the Project Daedalus spacecraft configuration.
SLIDE SHOW: What does the original Project Daedalus spacecraft design look like?
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.
http://news.discovery.com/space/project-daedalus-interstellar-spacecraft-design-110308.html