Atlas-Able was an American expendable launch system derived from the SM-65 Atlas missile. Atlas Able consised of an Atlas first stage, an Able second stage and an Altair third stage. The vehicle launched from Launch Complex 12, 13 and 14 at Cape Canaveral Air Force Station.
I recommend turning on "Advanced tweakables" in KSP settings.
Atlas-Able
Atlas D
Able
