Pat
As this color photo shows, other than some shock diamonds, the
H2O2/Kerosene exhaust is pretty much invisible:
http://content.answers.com/main/cont...Blackarrow.jpg

And since you couldn't even see shock diamonds...

Come on Pat, the evidence is pretty strong that *this*
vehicle is just peroxide monoprop, not HTP/RP-1. All
the people I know who've actually done work with peroxide
rocketry say it looks just like what they've seen with
peroxide monopropellant work, and not like what you see
with a peroxide/RP biprop.

~Jon