Could an airliner that flies anywhere in under three hours be in service by 2030?
Okay... so I guess supersonic is Mach 1 - 4 and hypersonic is anything above Mach 5. The more you know... STAR!!!
TechSpy is a community of awesome people posting and discussing the latest tech news. It’s part of NewsBoiler, a network of social news sites covering today’s pop culture.