Saturn Application Single Stage to Orbit

Saturn SSTO

Mission Profile

The Saturn Application Single Stage to Orbit was an ambitious NASA concept explored in 1967 under the Apollo Applications Program, investigating whether orbit could be achieved in a single propulsive stage using Saturn hardware and advances in propellant technology. Proposing a single-stage vehicle with a 10.1 m diameter derived from Saturn stage heritage, it studied whether favorable mass fractions could make the SSTO concept practical for post-Apollo operations. Though never developed, this study contributed to the broader body of knowledge that informed single-stage-to-orbit research conducted over the following decades.