the.com/sound barrier
The sky's own speed limit, shattered loudly to prove a point.
means The sharp rise in aerodynamic drag and turbulence a craft meets as it approaches and passes the speed of sound, famously announced by a sonic boom.
from The phrase comes from mid-20th-century aviation, when engineers noticed that aircraft nearing the speed of sound hit a wall of turbulent, unpredictable airflow — as if the air itself were solid. It entered wide public use around 1947, when Chuck Yeager flew faster than sound in the Bell X-1, and newspapers seized on 'breaking the sound barrier' as a vivid way to describe the feat. The 'barrier' was never a literal wall, just extreme drag and shockwaves — but the name stuck because it captured exactly how it felt to push against it.
- first broken
- Chuck Yeager, 1947, Bell X-1, named Glamorous Glennis
- the boom
- shockwave cone hitting ground, not the moment of breaking
- speed
- about 767 mph at sea level, drops with altitude
- myth busted
- pilots feared it would tear planes apart, it did not