In article ,
Phil Fraering pgf@AUTO wrote:
I think I'd want to switch from hybrid rockets to a liquid-fueled
system, but that's just my prejudices.

Hybrids are not an unreasonable choice. The one limitation, for an
operational vehicle, is that loading a new fuel grain -- inherently a
large, clumsy object -- is distinctly less convenient than just pouring
one more fluid into the appropriate tank, and that's going to slow down
turnaround.
--
"Think outside the box -- the box isn't our friend." | Henry Spencer
-- George Herbert |