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Sound Barrier Question  
User currently offlineMason From United States of America, joined Jun 1999, 748 posts, RR: 1
Posted (13 years 9 months 1 day 5 hours ago) and read 953 times:

Ok, this lies outside my area of expertise. I'm sure someone here can answer this question. When an aircraft breaks the sound barrier, is there only one sonic boom, or does it travel with the aircraft, creating many sonic booms. I believe there is only one, but I heard somewhere, perhaps on here, that there are many, and that is why the Concorde is not allowed to fly over land at supersonic speeds. Also, is there a sound when the aircraft returns to subsonic speeds? Thanks in advance.

5 replies: All unread, jump to last
 
User currently offlineFlyf15 From , joined Dec 1969, posts, RR:
Reply 1, posted (13 years 9 months 1 day 5 hours ago) and read 938 times:

The sonic boom is a shockwave which is created by the aircraft, obviously. This shockwave follows the aircraft in a cone shape. The walls of this cone, the shockwave, are quite thin. As they pass over a stationary observer, it appears just to be a quick boom, yet in reality is in fact a sound that travels with the aircraft - it is continuous.

User currently offlineAvratdwc From United States of America, joined Jan 2000, 68 posts, RR: 0
Reply 2, posted (13 years 9 months 1 day 5 hours ago) and read 930 times:

Hey man that is a good question. As far as I know from the books that I have read, the shockwave travels along the trailing edge of the wing causing a cone shape around the back of the aircraft. This shockwave always is going yet we only hear it when we are stationary since it is rather small and it moves back. Well man I hope that this helps a little.

User currently offlineAirbus A380 From Singapore, joined Jan 2001, 522 posts, RR: 0
Reply 3, posted (13 years 9 months 1 day 5 hours ago) and read 930 times:

I've also read in an article about the Concorde, Tu-144 and other supersonic jets that if these aircrafts were to fly over land, and a sonic boom occurs, everything on land will explode. Is this true?

User currently offlineCPDC10-30 From United Kingdom, joined Feb 2000, 4791 posts, RR: 23
Reply 4, posted (13 years 9 months 1 day 5 hours ago) and read 931 times:

If everying exploded, there wouldn't be anything in Southern Ontario from the Avro Arrow tests in the 1950s  Smile/happy/getting dizzy

User currently offlineAirbus A380 From Singapore, joined Jan 2001, 522 posts, RR: 0
Reply 5, posted (13 years 9 months 1 day 5 hours ago) and read 926 times:

My thoughts goes that way too, anyway thanks CPDC10-30!  Big thumbs up

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