Sonic booms – Concorde exempt?
Discussion
This was what effectively destroyed Concordes commercail viability. Once everyone had refused it permission to cross their air-space due to the booms, the only viable route left was trans-atlantic.
Does beg the question how did the SR71 get away with it? Both domestic training flights and also during ops?
Does beg the question how did the SR71 get away with it? Both domestic training flights and also during ops?
durbster said:
When they first broke the sound barrier, did they know it would boom?
It'd be bloody terrifying if not
Yes.It'd be bloody terrifying if not
Natural items have been breaking the sound barrier since time began. People may not have understood what was happeneing of course when they heard the bangs.
Ernst Mach solidified the science of transonic and supersonic effects in the 19th century (which is why we have Mach Numbers). Cannonballs, artillery shells and rifle bullets were already man made supersonic objects decades before Chuck Yeager broke the sound barrier in 1947.
The German V2 rocket was actually HYPERSONIC (4,000 mph plus) - and it first flew in 1942, five years before Yeager broke the sound barrier in the Bell X-1.
TEKNOPUG said:
daz3210 said:
I'm gessing during OP's permission isn't a worry. If they are in enemy territory do you think they are there with permission?
No but I'd expect it to be easy to trackI thought the sonic boom came AFTER the object that created it. Thus you only know where it has been.
oilydan said:
SWH said:
Grew up in the middle of Devon and used to hear Concorde every evening going supersonic over the Bristol Channel - made the front room windows rattle and the massive flat barn roof shake a tiny bit - Boom, b-b-boom is probably the best description, great stuff 
I grew up in North Cornwall and used to see the con-trails and hear the Boom, B-B-Boom every evening at around 6pm.Thanks for the nostalgia trip!!
daz3210 said:
TEKNOPUG said:
daz3210 said:
I'm gessing during OP's permission isn't a worry. If they are in enemy territory do you think they are there with permission?
No but I'd expect it to be easy to trackI thought the sonic boom came AFTER the object that created it. Thus you only know where it has been.
JonnyFive said:
I'd love this, would be excellent
I remember reading somewhere it'd fly normally out from London until Bristol, then open the engines up.
Watching in Bristol the change in speed was actually perceptible, it would appear at 'normal' speed from the east and be discernibly faster as it disappeared over the western horizon. Used to love watching it from my allotment.I remember reading somewhere it'd fly normally out from London until Bristol, then open the engines up.
Growing up, the sonic boom was audible in south Dorset too, if the weather conditions were right.
Nobby Diesel said:
I once flew to Washington DC on the Concorde and it was a totally unique experience.
Hearing the BOOM, feeling the thud in the middle of your back and watching the Mach meter at the front of the cabin was incredible.
What I remember most vividly though, was the view out of the window.
That's the boom of the reheat lighting up though, right, not the sonic boom? You shouldn't hear the sonic boom as a passenger because you're Hearing the BOOM, feeling the thud in the middle of your back and watching the Mach meter at the front of the cabin was incredible.
What I remember most vividly though, was the view out of the window.
travelling with the pressure wave.
daz3210 said:
TEKNOPUG said:
daz3210 said:
I'm gessing during OP's permission isn't a worry. If they are in enemy territory do you think they are there with permission?
No but I'd expect it to be easy to trackI thought the sonic boom came AFTER the object that created it. Thus you only know where it has been.
Eric Mc said:
durbster said:
When they first broke the sound barrier, did they know it would boom?
It'd be bloody terrifying if not
Yes.It'd be bloody terrifying if not
Natural items have been breaking the sound barrier since time began. People may not have understood what was happeneing of course when they heard the bangs.
Ernst Mach solidified the science of transonic and supersonic effects in the 19th century (which is why we have Mach Numbers). Cannonballs, artillery shells and rifle bullets were already man made supersonic objects decades before Chuck Yeager broke the sound barrier in 1947.
The German V2 rocket was actually HYPERSONIC (4,000 mph plus) - and it first flew in 1942, five years before Yeager broke the sound barrier in the Bell X-1.
durbster said:
When they first broke the sound barrier, did they know it would boom?
It'd be bloody terrifying if not
I think that was the least of their problems, I'm sure there is an old B&W film, based on the de Haviland tests - lots of "cannot hold it" and trips to cemetery. Fixed by the "flying wing" concept.It'd be bloody terrifying if not
Quick look on wiki - it was based on Geoffory de Haviland jr and the film was called The Sound Barrier, obviously enough. http://en.wikipedia.org/wiki/The_Sound_Barrier
It was also a fashion to force a boom at the Farnborough Airshow - until one crashed in 1952.
Also used to get booms in Southern Germany in the 1980's, possibly USAF.
Mave said:
That's the boom of the reheat lighting up though, right, not the sonic boom? You shouldn't hear the sonic boom as a passenger because you're
travelling with the pressure wave.
Yes, as a passenger, I guess you are effectively in front of the sound.travelling with the pressure wave.
I was 10 - pressure waves, sonic boom, noises..........who cares? It was exciting as hell.
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