This page no longer updated from 31 October 2001. Latest version can be found at YaKhR-2 Strap-on

Gross Mass: 110,000 kg. Empty Mass: 8,250 kg. Thrust (vac): 244,092 kgf. Isp: 311 sec. Burn time: 125 sec. Propellants: Lox/Kerosene Isp(sl): 269 sec. Diameter: 3.3 m. Span: 3.3 m. Length: 27.0 m. Country: Russia. No Engines: 6. RD-111 Status: Study 1959. Comments: R-7 strap-ons increased in size dimensionally 50%, equipped with 6 engines from R-9. Boost nuclear thermal core stage to altitude before ignition of nuclear engine. Masses calculated based on vehicle total weight and performance.
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Last update 12 March 2001.
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© Mark Wade, 2001 .