Timz From United States of America, joined Sep 1999, 6477 posts, RR: 8 Reply 1, posted (9 years 9 months 6 days 4 hours ago) and read 2546 times:
"when the aircraft passes the speed of sound"
When it has passed the speed of sound, you mean. The boom is a shock wave that the aircraft drags along behind it as long as it's flying faster than sound.
Pilothighflyer From United States of America, joined Jul 2003, 220 posts, RR: 0 Reply 2, posted (9 years 9 months 6 days 4 hours ago) and read 2546 times:
Futureualpilot From United States of America, joined May 2000, 2562 posts, RR: 8 Reply 3, posted (9 years 9 months 5 days 6 hours ago) and read 2465 times: