This page no longer updated from 31 October 2001. Latest version can be found at X-15A-2

Gross Mass: 16,069 kg. Empty Mass: 7,766 kg. Thrust (vac): 26,762 kgf. Isp: 276 sec. Burn time: 90 sec. Propellants: Lox/Ammonia Isp(sl): 239 sec. Diameter: 1.4 m. Span: 6.8 m. Length: 15.5 m. Country: USA. No Engines: 1. XLR-99 Status: Hardware.
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Last update 12 March 2001.
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© Mark Wade, 2001 .