The most recent Aviation Week & Space Technology has an article on possible drastic revision of NASA plans for reaching the moon and the requirements for the Project Constellation CEV.<br /><br />The current NASA flight architecture, and around which the current CEV requirements are based, assumes that like the Apollo mission before the CEV will use low-lunar-orbit rendezvous with a separate lunar lander which would land on the Moon and return to lunar orbit. But now NASA is considering instead direct access without using a separate lander.<br /><br />Draper has a contract with NASA to study lunar flight architecture, and considers the Apollo architecture inferior because of "new technology". After looking at thousands of different architectures, supposedly Draper is recommending a bi-conic capsule CEV, with a lift-to-drag of 0.6, which would land on the moon using a descent module and return to Earth using an ascent module. A separate habitat would provide the crew with Moon quarters (presumably landed via another descent module).<br /><br />It is already anticipated that NASA will amend the original CEV RFP with the requirement for ISS access. Depending on the final decisions NASA makes on the flight architecture, the additional requirement of landing on the moon could be added as well.<br /><br />I would certainly like more details of this supposedly superior flight architecture that Draper is pushing.