R.C.Macaulay wrote:
Watching this vid can propel the imagination. Studying the firing
sequence, I observed a color spectrum component that seems to suggest
something more than just a powerful propellent. The clue is the blue
color that suggests a UV phase experienced and then moves toward an
invisible and on to a dark..
That is possible if there is a sonoluminescence connection:
http://en.wikipedia.org/wiki/Sonoluminescence
This is probably an old video of the testing for the PWD (Pulse Wave
Detonation) engine of the rumored "Aurora" spyplane - the replacement
to the venerable SR-71. The fuel is said to be CH4 in a novel liquid or
gel form at higher than cryo-temps.
The mysterious "donuts on a rope" contrails have been seen near Groom
Lake and over the Pacific (and heard on occasion nearby) for at least
ten years.
If there is anything exotic (supra-chemical) besides the shock wave
interference pattern obvious in the exhaust plume, it probably relates
to some kind of cavitation type, sonoluminescent enhancement, who knows?
Jones
