Ian Woollard wrote: > > Hey, here's a question. I was reading Sutton the other day and they were > talking about the thermal stresses that Rocket engines face i.e. > positive few hundred C on inside, versus -193 if you regen cool, and > apparently the throat often shrinks by 0.25% or so and cracks up a bit > each time she lights. Anyway, I was wondering whether ERPS nozzles have > an easier time, with the inside and outside at much the same > temperature. So do you get much cracking or other progressive damage > everytime you light up?
We haven't had that sort of problem so far... but then, we're using uncooled stainless steel nozzles with H2O2 monoprop, and they probably get pretty well heat-soaked during a run - there isn't likely to be the same sort of thermal gradient-induced stress. -dave w _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
