|Manufacturer||Convair Divsion of General Dynamics|
|Country of origin||United States|
|Height||28 m (91 ft)|
|Diameter||3.05 m (10 ft)|
|170 kg (370 lb)|
|Launch sites||LC-12, 13 & 14, Cape Canaveral|
|First flight||26 November 1959|
|Last flight||15 December 1960|
The Atlas-Able was an American expendable launch system derived from the SM-65 Atlas missile. It was a member of the Atlas family of rockets, and was used to launch several Pioneer spacecraft towards the Moon. Of the five Atlas-Able rockets built, two failed during static firings, and the other three failed to reach orbit.
The Atlas-Able was a three-and-a-half-stage rocket, with a stage-and-a-half Atlas missile as the first stage, an Able second stage, and an Altair third stage. The first Atlas-Able used an Atlas C as the first stage, but this exploded during a static fire test on 24 September 1959.
The remaining launches used Atlas D missiles. Launches were conducted from Launch Complexes 12 and 14 at the Cape Canaveral Air Force Station. One launch was planned from Launch Complex 13; this became the second Atlas-Able to be destroyed during a static firing, and hence never launched.
|The Payload fairing broke up at 45 seconds after liftoff, causing loss of the upper stage and payload.|
|A propellant feed on the second stage had a malfunction.|
|Vibration and/or debris from the Able adapter section ruptured the liquid oxygen tank of Atlas, causing an explosion.|