This page no longer updated from 31 October 2001. Latest version can be found at Delta RS-68

Gross Mass: 226,400 kg. Empty Mass: 26,760 kg. Thrust (vac): 337,807 kgf. Isp: 420 sec. Burn time: 249 sec. Propellants: Lox/LH2 Isp(sl): 365 sec. Diameter: 5.1 m. Span: 5.1 m. Length: 40.8 m. Country: USA. No Engines: 1. RS-68 Status: Development. Comments: Low cost expendable stage using lower performance engine. Used in Delta 4, Boeing EELV. Engine can be throttled to 60%.
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Last update 12 March 2001.
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© Mark Wade, 2001 .