This page no longer updated from 31 October 2001. Latest version can be found at Kistler Stage 1

Gross Mass: 250,000 kg. Empty Mass: 20,500 kg. Thrust (vac): 514,900 kgf. Isp: 331 sec. Burn time: 139 sec. Propellants: Lox/Kerosene Isp(sl): 297 sec. Diameter: 6.7 m. Span: 6.7 m. Length: 18.4 m. Country: USA. No Engines: 3. NK-33 Status: Development 1997.

Stage burns for 35 seconds to place itself on return-to-launch-site trajectory for recovery. Therefore to calculate performance 12,400 kg propellants for flight back to launch site should be added to empty mass. Empty mass also includes six parachutes, landing bags, and is calculated, based by apportioning total vehicle empty mass.

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Last update 12 March 2001.
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© Mark Wade, 2001 .