After retirement, the ICBM's were refurbished and used over twenty years as space launch vehicles.Ītlas G/H/I: (1983) Atlas-Centaur launch vehicles using stretched, uprated Atlas core. Fully developed version of Atlas with Centaur upper stage.Ītlas E/F: (1966) Final operational versions of Atlas ICBM. Further improved and lightened Agena upper stage.Ītlas Centaur D: (1963) Also known as SLV-3C SLV-3D. First test verison of Atlas with Centaur upper stage.Ītlas Agena D: (1963) Also known as SLV-3A. Improved, enlarged Agena upper stage.Ītlas Centaur C: (1962) Also known as LV-3C. Ītlas Agena B: (1961) Also known as SLV-3. Agena originally called 'Hustler', based on engine for cancelled rocket-propelled nuclear warhead pod for B-58 Hustler bomber. First operational version of Atlas ICBM and used as launch vehicle for Project Mercury.Ītlas Agena A: (1960) Also known as LV-3A. '1 1/2' stage launch vehicle.Ītlas Able: (1959) Atlas with upper stage based on Vanguard second stage.Ītlas D: (1959) Also known as LV-3B. First all-up version of Atlas ICBM, with jettisonable booster engines and single engine sustainer on core. 50% reliability in 8 flight tests.Ītlas B: (1958) Also known as X-12. Two booster engines, no sustainer, dummy warhead.
These rockets demonstrated technologies that woud later be applied to the Atlas.Ītlas A: First test model of Atlas ICBM.
Limited funds permitted a few test launches. MX-774: Project MX-774 inaugurated by AAF with Consolidated-Vultee to study rocket capabilities with an ICBM as a final objective.
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