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Q:

What is faster than hypersonic and what speed or speeds does that range of velocity encompass?

A:

Generally, NASA defines "high" hypersonic as any Mach number from 10 to 25, and re-entry speeds as anything greater than Mach 25. Among the aircraft operating in this regime are the Space Shuttle and various developing spaceplanes. By the numbers, "high" hypersonic speeds are 10 to 25 Mach, 7,673 -19,183 mph, 12,348-30,870 km/h and 3,430-8,575 m/s.

Categories: Aerodynamics