Isn't it illegal to break the sound barrier over land?

[kelel01 1]

In the U.S., anyway. We just heard a sonic boom here, and it scared the shit out of me.

I mean, is it possible that we really just heard that here?

[yardhippie 0]

Nope.
Heard em all the time while in Dublin.

Its not illegal if youre the ones making the rules.

Goddam dirty hippies piss me off! ~GFD
"What do I get for closing your rig?" ~ me
"Anything you want." ~ female skydiver
Mohoso Rodriguez #865

[kelel01 1]

I thought they caused too much destruction and were outlawed.

What aircraft broke the sound barrier in Dublin? The King Air?

[Icon134 0]

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I thought they caused too much destruction and were outlawed.

What aircraft broke the sound barrier in Dublin? The King Air?

It was probably an F-15 that broke the sound barrier in Dublin... (Robins AFB is pretty close by...)

Livin' on the Edge... sleeping with my rigger's wife...

[yardhippie 0]

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I thought they caused too much destruction and were outlawed.

What aircraft broke the sound barrier in Dublin? The King Air?

there is an airbase near Dublin!

and Im sorry, you must be taken out and flogged with wet noodles.
While SDA's B90 King Air is a rocket ship...
It is a propeller driven aircraft, and will NEVER even get close to breaking the sound barrier. Well at least, get close and not impact the earth.

Goddam dirty hippies piss me off! ~GFD
"What do I get for closing your rig?" ~ me
"Anything you want." ~ female skydiver
Mohoso Rodriguez #865

[kelel01 1]

Der. I know that. I was making fun of you. What I didn't know was that there was an base nearby. But you know, I work right next to Dobbins, watching fighters fly all day every day, and I've NEVER heard a sonic boom since working here. So I found it odd that you heard more than 1 sonic boom over the course of a couple of days.

In case anyone was wondering, the speed of sound is 769 mph!

[monkycndo 0]

The speed of sound is directly related to temperature and air pressure. So 769mph is for sea level and 70F.

50 donations so far. Give it a try.

You know you want to spank it
Jump an Infinity

[itllclear 1]

Title 14: Aeronautics and Space
§ 91.817 Civil aircraft sonic boom.
(a) No person may operate a civil aircraft in the United States at a true flight Mach number greater than 1 except in compliance with conditions and limitations in an authorization to exceed Mach 1 issued to the operator under appendix B of this part.
(b) In addition, no person may operate a civil aircraft for which the maximum operating limit speed MM0exceeds a Mach number of 1, to or from an airport in the United States, unless——
(1) Information available to the flight crew includes flight limitations that ensure that flights entering or leaving the United States will not cause a sonic boom to reach the surface within the United States; and
(2) The operator complies with the flight limitations prescribed in paragraph (b)(1) of this section or complies with conditions and limitations in an authorization to exceed Mach 1 issued under appendix B of this part.


Appendix B to Part 91——Authorizations To Exceed Mach 1 (§§91.817)
Section 1. Application
(a) An applicant for an authorization to exceed Mach 1 must apply in a form and manner prescribed by the Administrator and must comply with this appendix.
(b) In addition, each application for an authorization to exceed Mach 1 covered by section 2(a) of this appendix must contain all information requested by the Administrator necessary to assist him in determining whether the designation of a particular test area or issuance of a particular authorization is a ““major Federal action significantly affecting the quality of the human environment”” within the meaning of the National Environmental Policy Act of 1969 (42 U.S.C. 4321 et seq. ), and to assist him in complying with that act and with related Executive Orders, guidelines, and orders prior to such action.
(c) In addition, each application for an authorization to exceed Mach 1 covered by section 2(a) of this appendix must contain——
(1) Information showing that operation at a speed greater than Mach 1 is necessary to accomplish one or more of the purposes specified in section 2(a) of this appendix, including a showing that the purpose of the test cannot be safely or properly accomplished by overocean testing;
(2) A description of the test area proposed by the applicant, including an environmental analysis of that area meeting the requirements of paragraph (b) of this section; and
(3) Conditions and limitations that will ensure that no measurable sonic boom overpressure will reach the surface outside of the designated test area.
(d) An application is denied if the Administrator finds that such action is necessary to protect or enhance the environment.
Section 2. Issuance
(a) For a flight in a designated test area, an authorization to exceed Mach 1 may be issued when the Administrator has taken the environmental protective actions specified in section 1(b) of this appendix and the applicant shows one or more of the following:
(1) The flight is necessary to show compliance with airworthiness requirements.
(2) The flight is necessary to determine the sonic boom characteristics of the airplane or to establish means of reducing or eliminating the effects of sonic boom.
(3) The flight is necessary to demonstrate the conditions and limitations under which speeds greater than a true flight Mach number of 1 will not cause a measurable sonic boom overpressure to reach the surface.
(b) For a flight outside of a designated test area, an authorization to exceed Mach 1 may be issued if the applicant shows conservatively under paragraph (a)(3) of this section that——
(1) The flight will not cause a measurable sonic boom overpressure to reach the surface when the aircraft is operated under conditions and limitations demonstrated under paragraph (a)(3) of this section; and
(2) Those conditions and limitations represent all foreseeable operating conditions.
Section 3. Duration
(a) An authorization to exceed Mach 1 is effective until it expires or is surrendered, or until it is suspended or terminated by the Administrator. Such an authorization may be amended or suspended by the Administrator at any time if the Administrator finds that such action is necessary to protect the environment. Within 30 days of notification of amendnent, the holder of the authorization must request reconsideration or the amendnent becomes final. Within 30 days of notification of suspension, the holder of the authorization must request reconsideration or the authorization is automatically terminated. If reconsideration is requested within the 30-day period, the amendment or suspension continues until the holder shows why the authorization should not be amended or terminated. Upon such showing, the Administrator may terminate or amend the authorization if the Administrator finds that such action is necessary to protect the environment, or he may reinstate the authorization without amendment if he finds that termination or amendnent is not necessary to protect the environment.
(b) Findings and actions by the Administrator under this section do not affect any certificate issued under title VI of the Federal Aviation Act of 1958.
[Doc. No. 18334, 54 FR 34327, Aug. 18, 1989]

"Harry, why did you land all the way out there? Nobody else landed out there."

"Your statement answered your question."

[yardhippie 0]

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Der. I know that. I was making fun of you.

Yea, you say that now!

Goddam dirty hippies piss me off! ~GFD
"What do I get for closing your rig?" ~ me
"Anything you want." ~ female skydiver
Mohoso Rodriguez #865

[kelel01 1]

Hmmmm . . . interesting. Thanks!

[kelel01 1]

You know, if you miss dripping sarcasm, complete with a , there's just nothing I can do to help you.

[simplyputsi 0]

Ok the illegal part I'll let you slide on this time.

It's rare to hear one near ATL as it does what it did to you, scares the bejesus out of people and they call 911 thinking something blew up.

Last time it happened I believe the pilot got yelled at for doing it as he was rather low over Dobbins.


I didn't hear it though and now I'm mad as shiznit!!!

Skymama's #2 stalker -

[Rick 67]

In central Florida we hear a sonic boom every time the shuttle lands

You can't be drunk all day if you don't start early!

[Darius11 12]

East Long Island we use to hear it when the concord use to fly. I believe once they are in international waters they can let it rip. If you are close to the shore you can hear it.

I'd rather be hated for who I am, than loved for who I am not." - Kurt Cobain

[OATSF14 0]

It is legal in certain areas.

There are areas set aside for what are called Post Maintenance Check Flights (PMCFs) When you change an engine or flight related component one of the things you have to do is go fast and see if that component works as advertised at speed. We used to do some south of Ft Worth in one the MOAs there. We had to be high 25K+ and stay on an assigned route. Could go as fast as needed.

[skymama 35]

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In central Florida we hear a sonic boom every time the shuttle lands

And it still makes me jump every time!

She is Da Man, and you better not mess with Da Man,
because she will lay some keepdown on you faster than, well, really fast. ~Billvon

[Lindercles 0]

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In central Florida we hear a sonic boom every time the shuttle lands

And it still makes me jump every time!

Hang on, let me get my pen. I've gotta add that to the list of things that make you jump. Right below "cold fingers."

[normiss 622]

actually we hear TWO sonic booms when she comes home...the nose and the tail each break the sound barrier.

I miss living on an Air Force base...base housing 1/4mi from the end of the runway, F-4's breaking the sound barrier as they leave...ALL hours of the night...

[skymama 35]

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I miss living on an Air Force base...base housing 1/4mi from the end of the runway, F-4's breaking the sound barrier as they leave...ALL hours of the night...

So that's why you're hard of hearing!

She is Da Man, and you better not mess with Da Man,
because she will lay some keepdown on you faster than, well, really fast. ~Billvon

[godfrog 2]

a couple of years ago sr-71's were refueling out of spokane wash. and after fueling they would throttle up and and we would get the double boom.

Experience is a difficult teacher, she gives you the test first and the lesson afterward

[SeaKev 0]

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a couple of years ago sr-71's were refueling out of spokane wash. and after fueling they would throttle up and and we would get the double boom.

Shhhhh. They were never there.

[BillyVance 34]

So isn't the space shuttle breaking the law every time it re-enters the atmosphere with its twin-sonic booms??

"Mediocre people don't like high achievers, and high achievers don't like mediocre people." - SIX TIME National Champion coach Nick Saban

[yardhippie 0]

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So isn't the space shuttle breaking the law every time it re-enters the atmosphere with its twin-sonic booms??

who's gonna write the ticket? The space police?

Goddam dirty hippies piss me off! ~GFD
"What do I get for closing your rig?" ~ me
"Anything you want." ~ female skydiver
Mohoso Rodriguez #865

[BillyVance 34]

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So isn't the space shuttle breaking the law every time it re-enters the atmosphere with its twin-sonic booms??

who's gonna write the ticket? The space police?

No... the two escort air force T-44s (or whatever they are).

"You in the shuttle, pull over down there!"

"Mediocre people don't like high achievers, and high achievers don't like mediocre people." - SIX TIME National Champion coach Nick Saban

[yardhippie 0]

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So isn't the space shuttle breaking the law every time it re-enters the atmosphere with its twin-sonic booms??

who's gonna write the ticket? The space police?

No... the two escort air force T-44s (or whatever they are).

"You in the shuttle, pull over down there!"

like they could ever catch the space shuttle! Geeze!

Goddam dirty hippies piss me off! ~GFD
"What do I get for closing your rig?" ~ me
"Anything you want." ~ female skydiver
Mohoso Rodriguez #865