This page no longer updated from 31 October 2001. Latest version can be found at SLS SRB 2720

Gross Mass: 366,716 kg. Empty Mass: 56,000 kg. Thrust (vac): 830,000 kgf. Isp: 263 sec. Burn time: 100 sec. Propellants: Solid Isp(sl): 238 sec. Diameter: 4.6 m. Span: 4.6 m. Length: 51.0 m. Country: USA. No Engines: 1. SLS-180 Status: Study 1961. Comments: Four such 180 inch segmented solid rocket motors provided first stage thrust for Project Lunex. A liquid propellant first stage was considered as an alternative, but the solid stage was the baseline. Empty mass, specific impulse estimated.
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Last update 12 March 2001.
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© Mark Wade, 2001 .