Good video.
What I'm looking for is a better understanding of how it all worked, from a pedants viewpoint of course.
Not sure if I'm allowed to make any more comments or ask any questions but I'll risk it.
One stumbling block was why would it be referred to as a partial ramjet?
I've just skimmed through my new book.
Fortunately (for me) the author says "the faster you flew the more fuel efficient it became....at Mach 3.0 it used 38,000 lb/hr. Accelerate to Mach 3.15 fuel flow drops to 36,000 lb/hr. The faster you flew the more it became a ramjet utilizing the high Mach air to augment the thrust of the engines."
Brian, maybe this explanation was also in the same authors "SR-71 revealed".