Henry Spencer wrote: > > On Fri, 27 Sep 2002, John Carmack wrote: > > Kerosene works great. The residue problem is only an issue when you are > > cooling with kerosene, which a peroxide biprop isn't. > > No, they're a more general problem than that. During testing, according > to the Rotary/XCOR folk, it's not uncommon to get propellant A into the > plumbing for propellant B by accident. XCOR uses isopropanol in its big > engines because of bad memories of repeatedly scrubbing kerosene residues > out of complex LOX plumbing.
And when the H2O2 plumbing includes a catpack... sounds like we'll need an "oxidizer-trail" shutdown to be safe, keeping the engine running as a monoprop during the shutdown purge of the fuel passage. (Recycle procedures after an emergency "scram" of both propellants could get tricky.) -dave w _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
