Why was the “sound barrier” ever considered a barrier in the first place? What is it about the properties of air that made achieving supersonic flight such a heralded feat of aerospace
BOOM: Breaking the Sound Barrier | Hill Aerospace Museum
Breaking the sound barrier by air, by land, and in free fall | Ars Technica
Boom - FlyBy - How exactly do you “break” the sound barrier?
Mach 1: Assaulting the Barrier | Air & Space Magazine| Smithsonian Magazine
Supersonic speed - Wikipedia
Mach 1 Speed: Breaking the Sound Barrier | Defensebridge
The mythical sonic barrier. When I heard about “breaking the sound… | by Andre Ferreira da Silva | Medium
What is the Speed of Sound? (with pictures)
Breaking the Sound Barrier - Fast As You Can | NASA
Reason For Sonic Boom, The Bang When Sound Barrier is Broken?
Aviation Day: How supersonic flights are making a comeback – Orange County Register
Can You See a Sonic Boom? | Live Science
How Fast is Mach One? - Universe Today
Breaking the Sound Barrier: Chuck Yeager and the Bell X-1 | National Air and Space Museum