Maybe I should have rephrased my questions, below.
I asked if pulse-jets could go supersonic with today's technology.
I didn't get a straight answer, so...
I'll rephrase the question, knowing their are at least four individuals on this forum with engineering training.
Can a pulse-jet aircraft, with modern technology, attain Mach-3 or 4,
and an altitude of upto 100,000 ft?
Can it be as effective as a ramjet?
Jacob