Saturn A-1, studied in 1959, was projected to be the first version of Saturn I and was to be used if necessary before the S-IV liquid hydrogen second stage became available. The first stage, proposed for the Juno V rocket, but finally used for the first Saturn rocket, would propel the Saturn A-1 into space, with the first stage of a Titan I missile continuing the flight and finally, a Centaur C high-energy double-engine third stage could perform a small burn to send a payload into its final orbit, or it can perform a big burn to take a payload out of Earth orbit to other planets.
Saturn A-1, studied in 1959, was envisioned as the initial model of Saturn I and would be utilized if required before the S-IV liquid hydrogen second stage became accessible. The first stage, initially proposed for the Juno V rocket but ultimately used for the inaugural Saturn rocket, would propel the Saturn A-1 into space, with the first stage of a Titan I missile continuing the flight and finally, a Centaur C high-energy double-engine third stage could execute a minor burn to send a payload into its final orbit, or it can perform a significant burn to transport a payload out of Earth orbit to other planets.