Manufacturer Name: TE-M-711-18. Designer: Thiokol. Gross Mass: 2,141 kg. Empty Mass: 131 kg. Propellants: SolidIsp: 292 sec. Diameter: 1.2 m. Chambers: 1. Country: USA. Status: In Production. Flown: 29. References: 410 . Comments: Lengthened version of Star 48B to provide increased payload capability. The design incorporates a longer cylindrical section in the motor case. Total impulse 591,142 kgf-sec. Motor propellant mass fraction 0.939.