Re: Concord (sic) doesnt fly anymore.
Quote: A bit more than 550 mph.
Just checked, the Boeing 747-8 has a cruise speed of 914 km/h, which is 567.9 mph. For the Airbus A380 it is 903 km/h (561.1 mph). </quote>
At Flight Level 360 maybe aka 36000ft. Know many drones of the nonmilitary type that fly that high do you? (not sure many of those even can fly higher than 10,000ft).