The Jupiter III was the Largest space shuttle concept conceivedThe Jupiter family of super heavy-lift launch vehicles was part of the DIRECT Shuttle-Derived Launch Vehicle architecture proposed by a group of NASA contract engineers as an alternative to the Ares I and Ares V rockets which were under development for the US Project Constellation.Research and inspiration source:An Alternate Approach towards Achieving the New Visionfor Space Exploration by Stephen Metschan TeamVision Corporation