AEnginesNASASolid EnginesUnited StatesUpper Stage Altair Altair X-248 from the Smithsonian Air & Space Museum The Altair Solid Rocket Motor was used as an upper stage on the United States’ Scout and Vanguard Launch Vehicles. Altair X-248 from the Smithsonian Air & Space MuseumAltair IIA X258 Technical Drawing [SC1]Altair IIA Thrust Curve [SC1]Altair IIIA Thrust Curve [SC1]