Henry wrote: > That's the LLNL piston-pump work (Astrid was their flight-test > rocket). > Whether XCOR's pump design is actually derived from the LLNL work, > or just > similar in general principle, is not obvious.
Wer were at the air show in le bourget (Paris) last week. We chatted with people from an ukrainian company which builds NTO/UMDH upper stage engines. One of their latest developments used a pneumatic piston pump driven by heated helium. IIRC the trust was in the range of 10 kN, but at a quite low chamber pressure.
Bruno, still beeing fascinated about russian engineering :-)
-- Bruno Berger Swiss Propulsion Laboratory E-Mail: [EMAIL PROTECTED] WWW: http://www.spl.ch HAM: HB9RSU
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