SM-65B Atlas
Atlas familyConvairRetired
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.

Specifications
- Thrust
- 1,587 kN
- Height
- 31.4 m
- Diameter
- 3.66 m
- Launch mass
- 3 t
- Stages
- 1
- LEO capacity
- 68 kg
Specifications from Launch Library. Figures the operator has not published are omitted.
Flight record
1flightwith a definitive outcome
100%success rate1 of 1
1success streakcurrent
Counted from padside's own launch record, the same basis as the stats page.