SM-65B Atlas – Convair Family: Atlas meters Length: 31.4 meters Diameter: 3.66 meters Launch Mass: 3 Low Earth Orbit Capacity: 68 The SM-65B Atlas was manufactured by Convair with the first launch on 1958-07-19. SM-65B Atlas has 0 successful launches and 0 failed launches with a total of 0 launches. The Convair SM-65B Atlas, or Atlas B, also designated X-12 was a prototype of the Atlas missile. First flown on 19 July 1958, the Atlas B was the first version of the Atlas rocket to use the stage and a half design with an operational sustainer engine and jettisonable rocket booster section. Unlike later Atlas models, the Atlas B used explosive bolts to jettison the booster section. Manufacturer Convair, previously Consolidated Vultee, was an American aircraft manufacturing company that later expanded into rockets and spacecraft. The company was formed in 1943 by the merger of Consolidated Aircraft and Vultee Aircraft. In 1953 it was purchased by General Dynamics, and operated as their Convair Division for most of its corporate history. Convair is a Commercial USA entity that was founded in 1943 and is administered by . Convair has 0 successful launches and 0 failed launches with a total of 0 launches.