
The Alcyone IA BE-3A was designed as a fifth stage kick motor for the United States’ Scout Launch Vehicle. It was only ever launched once on a Scout E-1 for Explorer 52.
Alcyone IA Technical Drawing [SC1] Alcyone IA Thrust Curve [SC1] Alcyone IA BE3-A9 Technical Drawing [SC1] Alcyone IA BE3-A9 Engine from Richard Kruse at HistoricSpacecraft.com