"Wow, so fast? But I can't feel it." Yang Jing was telling the truth. In this environment, there were no reference objects around, so even if he was flying at a speed of Mach 10, he couldn't feel it.

However, Yang Jing could still see that some parts of the wing would occasionally produce some obvious local shock waves of airflow. Yang Jing knew this phenomenon. This was because although the overall speed of the aircraft had not reached the speed of sound, the speed of the aircraft had reached 0.9 Mach, so the airflow in some local parts of the aircraft had actually reached the speed of sound, which would produce this local shock wave phenomenon.

This is the case when the current aircraft is flying at an altitude of only 2,000 meters. If the aircraft is flying at an altitude of 11,000 meters, the speed of 1,080 kilometers per hour has actually exceeded the speed of sound. Because at an altitude of 11,000 meters, the speed of sound is only 1,066 kilometers per hour, which is far lower than the speed of 1,224 kilometers per hour at sea level.

The higher you go, the easier it is to break the sound barrier.

"Haha, then should we speed up? The maximum speed of this plane can reach Mach 2.5, but I have never flown at such a fast speed. But I have often flown at Mach 2 in the past."

"Okay, speed up, let me feel the thrill of supersonic speed!"

"OK!" After George finished speaking, he started pushing the power push rod. Yang Jing only felt a stronger push on his back coming instantly.

Even without any reference, Yang Jing could feel that the plane was accelerating, especially the roar of the engine behind him was getting louder and louder, and the originally transparent air behind the wing could now clearly show the flow of air.

Even though Yang Jing was sitting in a sealed cabin at this moment, he seemed to be able to feel that the fuselage was under tremendous pressure.

In fact, breaking the sound barrier is not a good thing. When the plane approaches the speed of sound, the air is compressed and the resistance increases sharply due to the generation of local shock waves in the front of the high-speed aircraft. At this time, all parts of the aircraft and even the controls will produce strange reactions, and a slight mishandling will result in the destruction of the aircraft and the death of people.

Therefore, supersonic flight is certainly an exciting thing that makes pilots' adrenaline soar, but it is also very dangerous. If there is something wrong with the structure or fuselage of the aircraft, then the aircraft, which is fine at normal speed, may disintegrate at the moment of breaking the sound barrier.

Yang Jing once watched a video of a US F18 Hornet taking off from an aircraft carrier for a training mission. It was flying at supersonic speed at low altitude. When a sonic boom cloud just formed behind the wing, the Hornet suddenly disintegrated in mid-air. The scene was extremely tragic. The pilot didn't even have time to parachute. He and his beloved plane went to have tea with God.

And now, Yang Jing could clearly see that as the sound of the airflow ejected by the engine became louder and louder, a white "sound cone" appeared in front of the nose of the aircraft. This sound cone quickly extended backwards and finally formed a white "sonic boom cloud" behind the wing that was similar to the shape of a large trumpet.

This sonic boom cloud is caused by the fact that when the aircraft exceeds the speed of sound, it compresses the surrounding air due to its high speed, causing the water vapor in the air to condense into clouds, and eventually a cone-shaped sonic boom cloud will be formed behind the wing with the fuselage as the axis.

However, this kind of sonic boom cloud is not often seen. It is only when flying over the sea or when the air humidity is very high that this extremely beautiful sonic boom cloud can be produced.

Yang Jing was very lucky today. He saw this extremely rare sonic boom cloud during his first transonic flight.

As the sonic boom cloud was formed, Yang Jing clearly heard an extremely explosive "bang" sound, as if a big firecracker was detonated next to his ear. Then, everything returned to silence. The sonic boom cloud outside disappeared, and the sound of the engine jet airflow that was a little harsh just now was completely gone. The only sound that could be heard in the entire cabin was the sound of the engine moving.

At this time, the speed of the plane has exceeded the speed of sound, so all the sounds outside the plane are inaudible...