Chapter 792     Dawn (2)

"Dr. Herbert, we succeeded!"

Dawn One successfully took off and rushed towards the blue sky at an incredible speed.

All the people looked up excitedly and were excited.

Herbert was not in a hurry to be happy and stared at the soaring Dawn One.

Takeoff does not mean success.

The most important thing is the reaction of the aircraft when the speed reaches its limit.

Cameron drove Dawn One and continued to accelerate. Soon, the sound hindrance phenomenon came as scheduled.

When the flight speed reaches nine-tenths of the speed of sound, that is, when the air speed is about 950 kilometers per hour, the speed of local airflow may reach the speed of sound, generating local shock waves, thereby increasing the aerodynamic resistance dramatically.

To further increase the speed, the engine needs to have greater thrust. What's more serious is that shock wave energy makes the airflow flowing through the wings and fuselage surfaces very disordered, which makes the aircraft shake violently and makes it very difficult to operate.

At the same time, the wings will sink and the nose will fall down. If the plane is climbing at this time, the fuselage will suddenly rise up automatically. These symptoms may cause the plane to crash, which is the so-called "sound disorder" problem.

Since the transmission speed of sound waves is limited, moving sound sources can catch up with the sound waves they emit. When the speed of the object increases to the same speed of sound, sound waves begin to accumulate in front of the object. If the object has sufficient acceleration, it can break through the unstable sound wave barrier and rush to the front of the sound, that is, break through the sound barrier.

An object that advances at supersonic speed will continue to generate stable pressure waves in front of it. When the object moves towards the observer, the observer will not hear sounds; after the object passes, the generated waves are transmitted toward the ground, and the pressure difference between the waves will form an audible effect, that is, a sonic boom.

When the flight speed of the aircraft is lower than the speed of sound, the air in contact with the aircraft is like a "communication officer", "notifying" the air that is about to encounter in front of the aircraft at the speed of transmitting the sound, so that they "give way".

However, when the speed of the aircraft exceeds the speed of sound, the air in front of the aircraft is tightly compressed together because it has no time to hide, and it accumulates into a thin wave surface - shock wave. Behind the shock wave, the air is compressed, causing the pressure to suddenly increase, preventing the aircraft's further acceleration and causing the wings and tail wings to vibrate violently and explode.

The sound barrier is not only sound waves, but also resistance from the air. When the flying object is about to approach Mach 1, that is, the speed of sound, the air rushing in front cannot spread through the fuselage as usual. Therefore, the gas accumulates around the fuselage, creating a great pressure, and also triggers an invisible air vortex, commonly known as the "death vortex". If the fuselage is not specially reinforced, it will be shaken into pieces in an instant!

Now, a "death vortex" appeared around the fuselage of Dawn One, and its speed has reached the critical point of breaking through the speed of sound!

And Dawn One is destined to be a supersonic fighter!

Herbert stared at the sight of his breath and focused.

Success or failure is now!

"boom!"

After the loud noise, the whole world became quiet.

Dawn One successfully broke through the speed of sound, which means it passed through the sound barrier!

At this time, the pressure around the fighter will drop sharply. The instantaneous low temperature caused by the sharp drop will make the high-pressure air lower than its dew point, causing the water vapor to condense into tiny water droplets, which looks like a state of clouds and mist with the naked eye.

Since this low-pressure belt will return to normal pressure as the distance between the air and the fuselage increases, the overall shape looks like a conical cloud with the object as the central axis and spreads evenly around.

The whole process seemed thrilling, but in fact it was only a few dozen seconds.

Soon, Dawn One disappeared in the sky and saw no trace.

Herbert then breathed a sigh of relief and smiled.

Dawn One can fly up to Mach 1.3.

The Mach number is the ratio of velocity to the speed of sound. The speed of sound has different values ​​at different altitudes, temperature and atmospheric density, and is just a relative value. The Mach number 1 is double the speed of sound, which is equal to 340m/s, that is, 1224 kilometers per hour. If the Mach number is less than 1, it is subsonic speed, and greater than 1, it is supersonic speed.

The b2 bomber's speed is Mach 0.95, and it failed to break through the speed of sound.

The speed of sound and supersonic may seem to be just a small difference in value, but in fact it is an epoch-making improvement!

This is Chen Liang's first time riding in a fighter jet, and it is a supersonic fighter jet.

When Dawn One broke through the speed of sound just now and the environment changed from extreme movement to extreme static, the feeling was indescribable.

To be honest, it is like "traveling through time". They seem to have broken through the constraints of the rules of heaven and earth and entered another space from one space.

Einstein once said that when the speed exceeds the speed of light, it can transcend time and even reverse space-time.

Chen Liang can now feel this feeling slightly.

The speed of high-speed rail is generally 200-250 kilometers per hour, and its current speed is almost seven times that of high-speed rail!

"Mr. Chen, there may not be any better fighter jets than Dawn in the next hundred years."

Even if you know the various values ​​of this fighter in advance, Cameron can deeply feel its charm when he is in person.

You know, this is not a fighter that is known for its speed, but a bomber!

Cameron's implication is undoubtedly that he thinks that Dawn can lead the world by one hundred years. This may be a bit exaggerated, but it is enough to prove the shock that Dawn brings to him.

“How long will it take to enter American airspace?”

Chen Liang asked.

"Actually, we are already in American airspace."

Cameron responded, with a strange feeling in his slightly shaking voice.

America is recognized as the world's number one military power, who in the world can enter its territory without permission?

But now he did it.

And the Americans were not even aware of it.

Chen Liang then realized that the Bahamas were already close to America. Although they had not entered the American mainland, due to the terrifying speed of dawn, they might have entered the American territorial waters without knowing it.

In the past, only the United States relied on its strong military strength and sent fleets or planes to wander outside other people's homes from time to time. The arrogant Americans should never have thought that one day they would be silently broken into the home by others.

"Mr. Chen, ahead is the southeast gate of America, Florida."

Cameron reminded.

Although he also had some impulse in his heart, this matter was extraordinary after all.

You should know that armed transit without permission, even if it is just an airplane, a soldier, or a warship, it is equivalent to invasion!

"Fly in."

Chen Liang's response as if nothing had happened came.
Chapter completed!