Sonic boom

[Interceptor]

Impressive pics.

 

[Neo]

I didn't know a glider could create it, impressive!

He's the B-2 Spirit.

 

[Interceptor]

I didn't know a glider could create it, impressive!

I am sure its photoshop a glider breaking speed of sound.

 

[ahussains]

Nice photos all u guyes shaers ///

 

[Skull-Buster]

cann anyone tell me what is a sonic boom?

 

[Muradk]

cann anyone tell me what is a sonic boom?

Well friend this would be

Sonic boom is an impulsive noise similar to thunder. It is caused by an object moving faster than sound, about 750 miles per hour at sea level. An aircraft traveling through the atmosphere continuously produces air-pressure waves similar to the water waves caused by a ship's bow. When the aircraft exceeds the speed of sound, these pressure waves combine and form shock waves which travel forward from the generation or "release" point.

As an aircraft flies at supersonic speeds it is continually generating shock waves, dropping sonic boom along its flight path, similar to someone dropping objects from a moving vehicle. From the perspective of the aircraft, the boom appears to be swept backwards as it travels awayfrom the aircraft. If the plane makes a sharp turn or pulls up, the boom will hit the ground in front of the aircraft.

We used to go over Bakhar from Shorkot in Mirages and over the desert take the Mirage super sonic and just turn the nose a bit towards the ground, we could see waves travelling and hitting the ground as if someone exploded a 500 pounder. That is why Sonic booms are not allowed specially over cities but it tends to happen now and them .

 

[Muradk]

Sad story about Sonic Boom is that in now a days it has become a wepon. In Desert Sheild The American used it against Complete Villages and God knows how many people got Screwed.
It has become a physiological weapon.

 

[Skull-Buster]

thanks for the info Bro! and interesting to see that sonic boom can actually be used as a weapon....

 

[kvLin]

Let's switch the pressure effect into water and guess what?

 

[Interceptor]

Let's switch the pressure effect into water and guess what?

I agree with KV, its to do with the pressure formulas. I dont want to post Algebra and calculus on a defence site.

 

[kvLin]

It's not about algebra or calculus.

check here:
Using Sound Waves To Induce Nuclear Fusion With No External Neutron Source

Last week I was reading a Chinese version Science & Vie (French),June issue.

Article: "Toute I' energie du soleil dans des bulles"

It is interesting, yet not much further than speculation.

 

[Interceptor]

Wave models using calculus and algebra thats what I mean.

 

[A.Rahman]

Wave models using calculus and algebra thats what I mean.

Thats one of my subjects !

 

[Neo]

What Supersonic Looks Like​

The breaking of the sound barrier is not just an audible phenomenon. As a new picture from the U.S. military shows, Mach 1 can be quite visual.

Reuters – A U.S. Air Force F-22 Raptor executes a supersonic flyby over the flight deck of the aircraft carrier …​

This widely circulated new photo shows a Air Force F-22 Raptor aircraft participating in an exercise in the Gulf of Alaska June 22, 2009 as it executes a supersonic flyby over the flight deck of the aircraft carrier USS John C. Stennis.

The visual phenomenon, which sometimes but not always accompanies the breaking of the sound barrier, has also been seen with nuclear blasts and just after space shuttles launches, too. A vapor cone was photographed as the Apollo 11 moon-landing mission rocketed skyward in 1969.

The phenomenon is not well studied. Scientists refer to it as a vapor cone, shock collar, or shock egg, and it's thought to be created by what's called a Prandtl-Glauert singularity.

Here's what scientists think happens:

A layer of water droplets gets trapped between two high-pressure surfaces of air. In humid conditions, condensation can gather in the trough between two crests of the sound waves produced by the jet. This effect does not necessarily coincide with the breaking of the sound barrier, although it can. To learn more, click here.

The aircraft carrier was participating in Northern Edge 2009, an exercise focused on detecting and tracking things at sea, in the air and on land.

 

[Neo]

What is a Sonic Boom? ​

There's something strange about the notion of seeing the sound barrier, as this Navy photograph suggests is the case. The sound barrier is just a certain velocity relative to the surrounding environment, not an actual membrane to be penetrated by a jet's nose.

​

So what's going on?

The visual phenomenon in this picture is caused by a layer of water droplets trapped between two high-pressure surfaces of air. In humid conditions, condensation can gather in the trough between two crests of the sound waves produced by the jet. This effect does not necessarily coincide with the breaking of the sound barrier, although it can.

On October 14, 1947, U.S.A.F. Major Charles "Chuck" Yeager flew into aviation history by piloting a Bell XS-1 research plane to supersonic speeds. These days NASA is flying unmanned aircrafts at close to Mach 10 velocity.

The origins of the Mach number stretch back before humans ever took flight, to 1887, when Austrian physicist Ernst Mach established his principles of supersonics. His famous Mach number is the ratio of an object’s velocity to the velocity of sound, relative to the local environment. Sounds are waves of disturbance in the atmosphere and so their velocities depend on air temperature and pressure.

At sea-level pressure in 59-degree Fahrenheit air, sound travels 760 mph. Flying any faster is a noisy enterprise. When moving at subsonic speeds (Mach number < 1), an aircraft&#8217;s pressure disturbances (i.e. sound waves) are generally distributed in all directions.

But on breaking the sound barrier the pressure field of the aircraft extends from the rear of the plane in a Mach cone&#8212;a shock wave that builds and causes a sonic boom.