Jonathan Goff wrote:

But all the guys I know who've done peroxide (John Carmack,
my boss Dave, some of the ERPS guys, etc) say it looks just like a
peroxide engine. Maybe that was steam, not frost?

But overall, pretty darned cool.


Black Arrow had the same H2O2/RP-1 combo propellents, and its exhaust
was almost invisible:
http://www.astronautix.com/graphics/p/prospero.jpg

Pat