RudyP
Cleared for Takeoff
That's a good point, and probably the distinction I was missing. As I recall the Concorde had to go subsonic over CONUS, but was known for the M2.0 cruise over water. I remember seeing the M1.6-1.7 number, but that would be much faster over land. I still think they should at least be able to do 2.0+ over water to match/beat the Concorde, although there would be the question of whether the airlines would want to make that speed distinction and efficiency distinction between the routes.
I'm guessing there is a pretty dramatic improvement in cost efficiency between 1.6-1.7 and 2.0. Recall that the Concorde could never make the economics work (at least not without government subsidies) even at what was considered pretty stratospheric pricing.
I flew the Concorde once from Paris to New York and it was pretty cool. If this actually happens, it will definitely make me break my "no airline flying" rule.