This page no longer updated from 31 October 2001. Latest version can be found at www.astronautix.com
Gross Mass: 357,239 kg.
Empty Mass: 52,040 kg. Thrust (vac): 770,975 kgf. Isp: 286 sec. Burn time: 140 sec. Propellants: Solid Isp(sl): 259 sec. Diameter: 3.2 m. Span: 3.2 m. Length: 33.5 m. Country: USA. No Engines: 1. USRM Status: Devel. Other designations: Upgraded Solid Rocket Motor.
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Last update 12 March 2001.
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© Mark Wade, 2001 .