Yep, that certainly helps a bit. But what I'm mainly interested in is to what degree EAS could be used for calculating aerodynamic loads in trans/supersonic v subsonic regimes.
I appreciate the convenience of showing stall speed in EAS, but if I said, for example that an aircaft at 400kts and sea level would handle the same and be subject to the same stresses as an aircraft at 400EAS and 40k (i.e. around mach 1.2) would I be correct? (I don't think I would be, but I want to get this confirmed!)
It seems to me that EAS is useful at subsonic speeds to calculate loads, express various limitations etc, but if you are considering an EAS that is subsonic for one part of the flight envelope and supersonic for another, it's usefulness is somewhat limited, as you are dealing with quite different flight regimes.
Thanks again.