"It was only at this moment that I felt that I was one of those who had killed him and realized what I had done to this young pilot. I am reminded of the poignant letters from the Casualty Statistics Division of the Archives Bureau. Tomorrow, there will be a mother who is heartbroken. At this point, I vowed to do my best to end the carnage as soon as possible. Ninja 1 is as brave as our pilots, and no matter what language it uses, the meaning of military duty is the same. We all miss him dearly, he was such a jolly young man in our hearts. ”

"I was later transferred to the officer training course. But due to excessive fatigue and lack of sleep, I can't remember the course I studied, except that the school was held in a boarding school for boys. My parents were naturally very proud to be the first officer in the intelligence service of the Air Force Women Auxiliary. I'm glad I didn't accept the request to be a confidential officer, and I waited for a more interesting appointment. At the end of the training course, the trainees saw a curious message on the distribution list: 'Assistant Officer Deng Shiman of Department 1623 (Administrative Division of the Intelligence Department)'. They did their best to find out where I was, but I knew they couldn't reveal it. ”

Seeing this, Yeleni looked up and smiled embarrassedly at her.

"I'm sorry to have you here with me." She said apologetically.

"It's nothing, I think it's good, at least you can stay away from those cruel things." Deng Shiman said with a smile.

"I also swear to you that I will do my best to end this war as soon as possible." Eleni said solemnly.

"We in China have a saying called 'do our best and obey the destiny of heaven.'" Dunsmann looked at the serious look of the young German girl and said with a smile, "Let's work together!" As for the outcome, we can't yet predict it now. ”

The two of them were talking, and the fuselage suddenly shook slightly, Deng Shiman looked out the window and said, "We have arrived." ”

When the group got off the plane, Eleni noticed the figure of Yang Shuoming in the greeting team.

"Where are you taking me again?" She looked at the late day, and asked him with some confusion.

"Is it okay to watch a movie with me and my family?" Yang Shuoming was stunned for a moment, and then laughed.

"I don't watch war movies and documentaries." She said happily, "I've seen too much these days. ”

"Don't worry. It's a Hollywood movie. Yang Shuoming replied.

At this moment, there was a sudden thunderous whistling sound in the night sky in the distance, and people turned to look, just in time to see a bright red line passing across the sky, fleeting.

"Is that a shooting star?" Eleni asked curiously.

"It's not." Yang Shuoming replied that his "supercomputer eye" had already seen what it was just now.

"Damn broken darts! Can it be done? ”

At this time, Xu Yongling, a first-class test pilot of the Chinese Air Force who was lying in the "Firebird" fly-wing jet fighter, couldn't help but curse.

"Steady! Lao Xu! Now is not the time to scold! Zhang Lina, another female test pilot on his right side, who was in a prone position like him, said.

Xu Yongling took a deep breath, calmed down, and began to try hard to stabilize the plane.

Xu Yongling was a pilot when he was a soldier, and after he transferred to the reserve at the age of 29, he came to the Shanghai Flight Research Institute, a Chinese test pilot training college. The duration of this college is one and a half years. During this time, Xu Yongling learned to fly 24 types of aircraft, ranging from fighter jets and bombers to transport aircraft.

I remember that it was the graduation exam, and the candidates drew the test questions, which indicated what kind of plane they were flying. The type of aircraft Xu Yongling drew was the "Baiyun" transport plane. The specific subject is: single-engine flight. As soon as he lifted off the plane, the instructor turned off one of the engines. His task was to keep the flight as smooth as possible and then land in a twin-engine stop. You must know that the "Baiyun" aircraft is a light aircraft, and the difficulty can be imagined. After I completed a series of aerial stunts, the instructor turned off one of the engines at high altitude. The challenge for him was to return safely to the airport with a single-engine parked fighter. It was clear that the accompanying examiner was testing how he could handle the danger, and in the event of a loss of control, he would immediately restart the engine. And this life-and-death test is only 15 seconds, and once there is an accident, he will miss the "five-point" review. If you get a bad or medium rating, you will be assigned to work in an aircraft factory. And that time, Xu Yongling still won "five points" with an outstanding performance.

As a test pilot, Xu Yongling has super adaptability. Because the planes he flew were different, he had to adapt to the changes quickly. This process is called "muscle memory". When he sits in the cockpit, you should immediately become one with the aircraft, to the state of "man-machine integration", but most people can't do that. Some pilots are accustomed to flying a fixed type of aircraft, and it is difficult to change to other aircraft. It's an innate talent that requires the brain to make decisions quickly and then signal to the muscles, which in turn respond quickly. The brain says: Yes, I see; The muscles said, "Yes, I'll do it right away." And this adaptability cannot be acquired through training. If you don't have the talent for it, you can't do it.

For test pilots, there is also a requirement for excellent physical fitness. Should be able to withstand maximum flight overload. When the flight is overloaded, the blood will go down, and the heart will be unbearable, making a "da-da-da" sound, and this is how I feel now - because the blood pressure is stronger than the pressure of the heart, and his internal organs such as stomach and liver are also down. Then there is the negative overload, and all these organs of the liver are hugged to the throat.

The highly adaptable pilots were assigned to one of the largest flight research institutes in the country. It has a 6 km long runway. They have flown a variety of new aircraft here. And Xu Yongling is the last hurdle before the plane is delivered.

As we all know, the order gives the manufacturer technical indicators: what should be the speed, what is the weight, and what is the deadweight tonnage. The manufacturer produces the finished product according to the requirements. However, test pilots are required to make the final checks before the aircraft is officially delivered to the military or local airlines. Because no matter how well an aircraft is built, there are still many defects found in the process of use. This couldn't be more normal. The same is probably true for cars. Even a top-of-the-line car like the "Golden Dragon", after running hundreds of thousands of kilometers, will expose some flaws. In other words, it needs to be continuously strengthened and improved. This process is called "use trial". The first prototypes produced by aircraft factories are still far from practical application and delivery to the military and localities. Thus thousands of flights are made.

In Xu Yongling's personal experience, he often encounters dangerous situations. They sometimes test fly in extreme conditions in order to find out the limits of the aircraft's capabilities.

The aircraft has two stabilizers. When close to the ground, it is subjected to tremendous velocity pressure. These stabilizers begin to flutter and may cause resonance and cause the fuselage to break. I remember that time, one side of the fuselage of the plane Xu Yongling was broken, but fortunately the whole fuselage was not endangered, and he still had time to eject out of the cabin, which only caused the "slight consequences" of a broken spine afterwards. Now, he has a total of 4 compression fractures and 4 intervertebral disc herniations all over his body.

The most dangerous moments of a test flight are take-off and landing, and anything can happen. At this point, the aircraft is in a state of loss of altitude, stall and poor maneuverability. On one occasion he flew a fighter jet and crashed into a flock of birds at a low altitude of 150 meters. Had to make a forced landing in the wilderness. Luckily, the place is quite open. At that time, he suffered a fracture of the bridge of his nose and suffered his first compression fracture. He kept his speed and didn't cause a crash. Then quickly select a landing site, and finally land successfully.

Of course, our work is extremely dangerous. The average lifespan of a test pilot is only 29 to 36 years. In the military cemetery, located on the outskirts of the city, 116 test pilots are buried. Seven people were killed in the test flight of the "Fire Eagle" jet fighter, and nine people were killed in the test flight of the "Hongyan" bomber. At most, they buried 12 colleagues in a month. The military cemetery and nearby streets were crowded with farewells. He would fly the plane twice over the crowd — a tradition of theirs, usually in the latest fighter jets for funerals.

This time today, if he couldn't drive the plane back safely, someone else would have sent him a fighter jet to his funeral.

The "Firebird" jet fighter piloted by Xu Yongling and Zhang Lina is a flying wing fighter driven by two turbojet engines. It was Xu Yongling who scolded just now.

The so-called flying wing, as the name suggests, refers to the aircraft without a fuselage and only wings (nor without any vertical wing surface), the pure wing surface has the purest lift surname energy, this kind of aircraft can greatly reduce weight, reduce drag, save manufacturing costs, plus its habitual surname is low, but also increase the maneuvering surname of flight. Due to the various advantages of the flying wing, it has aroused great interest from the Chinese side. "Firefinch" is a product of such a background.

The Finch has a medium span design with a relative thickness of 13%, and the leading edge of the wing end is relatively wide and thin, which gradually extends backward and becomes thinner. The two engine nacelles of the "Firefinch" are all located in the center of the tail of the flying wing, one on the top and the other on the bottom, isolated by the wing in the middle. The advantage of this design is that it can reduce the chance of two engines being hit at the same time, and the form of the engine nacelle is obviously conducive to changing different types of engines, making the whole aircraft look dynamic. There are three fuel tanks in the whole machine, all of which are self-sealing and equipped with a gas flame retardant system. In order to ensure the smooth shape of the aircraft and reduce aerodynamic drag, the cockpit of the aircraft is fully integrated into the fuselage and is located at the very top of the fuselage triangle, with the canopy flush with the surface of the fuselage. The cockpit is pressurized and heavily armoured, and the entire nose is made of transparent material to ensure viewing angles, and the two occupants are in a prone position. This has the advantage of putting the pilot under greater overload, but it can be a lot of trouble when the aircraft is badly damaged and needs to be abandoned.

What is even worse is that the stall tailspin has always been regarded as a forbidden area by delta-wing fighters, which has plagued the improvement of the training level of China's air forces and the display of aircraft capabilities, and seriously affected flight safety. Because once the plane stalls and enters the tailspin state, it will be like entering a huge magnetic field and falling in a twisted shape, often resulting in the destruction of the plane and the death of people. Therefore, the stall tailspin is praised as a "death trap" by the world aviation industry, and it is as elusive as a fog.

Today, the first test flight of the "Firefinch" aircraft was carried out at a high angle of attack.

At an altitude of 10,000 meters, Xu Yongling and Zhang Lina gradually reduced their speed, and when the speed dropped to about 240 kilometers per hour, the plane began to struggle. As the speed continues to decrease, the nose of the aircraft rises upwards, the angle of attack increases, and it enters a stall state. At this time, due to continuous mistakes, the plane entered a positive tail spin - a "death trap"!

Xu Yongling felt that after entering the tail spin, it was like entering a huge vortex, and the plane was sucked into the abyss like twisting twists, and because of the rapid rotation of the plane, the scenery outside the cockpit became confusing, which was extremely frightening. At this point, because the aircraft is rolling to the right, untrained pilots will subconsciously press the lever to the left to smooth the slope, which will actually make the tailspin dynamics more violent.

The correct longitudinal should be a flat rudder, the rod is neutral, if the tail spin can not be stopped, you can press the rod. Due to their rigorous training, the two test pilots overcame the pressure of more than twice the weight of their bodies brought about by the huge positive overload, quickly adjusted their condition, and after maintaining a continuous miscarriage for 15 seconds, they adopted a series of actions such as flat rudder and push rod neutrality, and the aircraft finally changed its tail spin.

Xu Yongling retracted the throttle to reduce the flight speed, and when the watch speed reached about 220 kilometers per hour, the aircraft entered a stall, and the angle of attack of the aircraft was -20 degrees. Then, he tried to pull the rod directly behind him to the end, and at the same time pedaled the right rudder to the end, and the plane first deviated to the right under the action of aerodynamic force, but then rolled to the left under the action of the coupling force, and the plane immediately entered an inverted tailspin.

Anyone who is engaged in flying knows that it is very dangerous to get into this tailspin. At this time, Xu Yongling and Zhang Lina were flying upside down, and the huge negative overload lifted their bodies up, however, the more dangerous situation was still to come. Just when the two of them felt that the world was spinning, the plane suddenly made two "smack, smack" sounds, and Xu Yongling heard Zhang Lina shouting in the headphones, "Stop!" ”

It turned out that the aircraft was in the inverted tail spin, the angle of attack reached -55 degrees, and the engine air intake was insufficient, which further hindered the air intake in this state, causing the engine to be "suffocated" due to lack of oxygen. Flying upside down and stopping in the air, Xu Yongling and Zhang Lina encountered a series of dangers.

Because the two test pilots had a deep understanding of the tail spin and had rich experience, they did not panic at this time and quickly adopted the method of inverting the tail spin. At this moment, time is calculated in seconds, 1 second, 2 seconds, 3 seconds...... Every second, the two of them felt "long" like never before, because they were in a state of constant tumbling at the moment, the seat belts on their bodies were "squeaking, squeaking", and the sky outside the cockpit was dark, and the wind was howling. Finally, the plane changed its tail spin after 5 seconds, Xu Yongling quickly closed the throttle, lowered the altitude of the aircraft, placed the engine in the parking space, kept the air glide, and increased the speed of the aircraft with a dive attitude to create conditions for starting in the air.

Xu Yongling prepared to start in the air while reporting the situation to the ground control tower. The ground commander instructed: "Altitude 8000, can be activated." Xu Yongling was very calm before starting, and did not forget to use the plane's air glide to remove the residual oil in the engine first. Because the fuel supply system is still supplying oil after the engine is stopped, if the residual oil is not removed, it will affect the air start. Subsequently, Zhang Lina followed the actions demonstrated many times on the ground, and opened the ignition electric door in the air at a watch speed of 550 kilometers per hour, only to hear the aircraft engine humming a "um" sound like a bass, and it continued to increase. After 3 seconds, Zhang Lina pushed the throttle to the slow position, and the engine speed rose steadily, and she then moved the throttle gently to check the working status of the engine. At this point, the plane started successfully in the air, and the engine re-emitted a huge roar, which is the most beautiful symphony in the hearts of test pilots, which represents life and hope.

However, at an angle of attack of -40 degrees, although they were ready, the plane again entered the inverted tailspin and stopped in the air again under the habitual name!

"No more! Abandon it! Xu Yongling said with some discouragement.

"Don't! Lao Xu! Hold on for a few more seconds! Zhang Lina, a 24-year-old girl, shouted. Have you forgotten? Pilots must have the ability to endure 'loneliness' and have the courage to hold on even for 1 second longer! ”

"No matter how persistent, you and I won't be able to get out!" Xu Yongling roared.

"Nope! Lao Xu, have you forgotten? When the aircraft is in the tail spin state, after the change action, the aircraft will rotate more intensified and the nose will fall down after a few seconds, which is the precursor of the aircraft to change the tail spin! In reality, many new pilots in the army will be very nervous once this situation occurs, and will even immediately parachute or repeat the tail spin change action, and in the end they still cannot change the tail spin. There have been cases at home and abroad where the plane entered the tail spin, and the pilot thought that the plane could not be changed out and hurriedly parachuted after the pilot made the change action, but the plane changed the tail spin on its own without piloting, and flew more than 1,000 kilometers before crashing! Because of the hurry, Zhang Lina's words were as fast as a fountain, "In fact, each kind of aircraft has its own unique stall tailspin surname, like the 'Fire Eagle' plane we flew last time, after doing the action, you can change the tailspin in about 5 seconds, and some planes take longer or shorter time." When we used to do tail spin test flights, we found that the existing aircraft had a change time of 30 seconds, and you had to have the courage to hold on for 1 more second when changing the tail spin! ”

(To be continued)