Henry Spencer wrote: HS> No, not so. Both SSME preburners run fuel-rich. And yes, this requires HS> truly elaborate shaft seals between the oxidizer-pump turbine and pump. HS> NASA has long *talked* about designs which run oxidizer-pump preburners HS> oxidizer-rich, to make the seals less critical, but has never done anything HS> about it. The materials problems in the turbine were thought to be HS> excessively difficult.
Ops. Should better have had a looked at the SSME flow diagram before posting. Was eventually misled by the fact that the booster pumps are driven with the respective fluids. Hydrogen booster with hot gaseous H2 and the low pressure oxygen turbopump with liquid oxygen. Hans Ulrich Ammann mailto:[EMAIL PROTECTED] _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
