Mason
Topic Author
Posts: 636
Joined: Sat Jun 12, 1999 12:01 am

Sound Barrier Question

Mon Feb 05, 2001 12:21 pm

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.
 
flyf15
Posts: 6633
Joined: Tue May 18, 1999 11:10 am

RE: Sound Barrier Question

Mon Feb 05, 2001 12:29 pm

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.
 
avratdwc
Posts: 68
Joined: Tue Jan 25, 2000 12:13 am

RE: Sound Barrier Question

Mon Feb 05, 2001 12:37 pm

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.
 
Airbus A380
Posts: 508
Joined: Sat Jan 06, 2001 3:54 am

RE: Sound Barrier Question

Mon Feb 05, 2001 12:38 pm

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?
 
CPDC10-30
Posts: 4681
Joined: Wed Feb 02, 2000 4:30 pm

RE: Airbus A380

Mon Feb 05, 2001 12:42 pm

If everying exploded, there wouldn't be anything in Southern Ontario from the Avro Arrow tests in the 1950s  Smile/happy/getting dizzy
 
Airbus A380
Posts: 508
Joined: Sat Jan 06, 2001 3:54 am

RE: Airbus A380

Mon Feb 05, 2001 12:48 pm

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