rjohnson11This is surely the result of using crappy old engine design.
emeprorrjohnson11This is surely the result of using crappy old engine design.Not a crappy design, infact one of the best designed rocket engines ever. However they are 40+ years old, not the best thing to do with rocket engines(yay semantics). Although Orbital can now buy the RD-180 which they're going to use on a new rocket I believe. That or as an interim until they develop a brand new engine and launch vehicle (antares MK2)