The term "supersonic" refers to movement at speeds exceeding the speed of sound, which is approximately 767 mph at sea level. This threshold, known as Mach 1, represents a critical boundary in aerodynamics. For decades, supersonic flight was primarily the domain of military aircraft and specialized research vehicles, but the late 20th century saw the rise—and fall—of commercial supersonic transport (SST), a dream that modern innovators are now working to revive. Historical Milestones
In 1947, Chuck Yeager became the first person to officially break the sound barrier in the rocket-powered Bell X-1 .
Debuting in 1969, the Concorde was a marvel of European engineering, capable of flying from New York to London in under three hours. It offered a lifestyle of high-speed luxury for over 30 years.