Now, Luo Hai only needs to wait quietly for the old bird to send a message in the afternoon, and then take a flight to leave India and fly to Saudi Arabia, and then transfer back to Pakistan after arriving in Saudi Arabia, in which Luo Hai does not want any accidents.

Hearing Luo Hai's words, Nuwa, who was transferring data jù, responded: "There are still 30 seconds" The entire computer is transmitting a huge number of military technology at a speed of 2M per second, which is the number jù that Luo Hai must obtain.

Luo Hai nodded, got up and walked to the desktop computer that was powered on, and waited quietly for more than ten seconds after all the military science and technology numbers were downloaded, and then Luo Hai turned off the power to operate, took out the 500G hard disk in the computer host and put it in the carry-on space, and after doing this, Luo Hai restored it as it was.

Restoring the whole computer, Luo Hai was sitting in front of the computer desk, after taking out the pen and paper, the brain, like a computer, was running at high speed, and the whole person knew the experience gained in actual combat during this time and the perception of aerodynamics before the crash, all written on the entire manuscript paper, and began to write the paper that the teacher asked him to write a month ago.

Luo Hai attaches great importance to this paper, not only to improve his own strength, but also to respect the teacher, so Luo Hai has studied all his recent thoughts and experiences and prepared to write this paper.

An excellent thesis requires at least a certain number of degrees and a theoretical foundation, and Luo Hai adopted the theories of Xu Yongling, a special test pilot, to learn from each other's strengths and weaknesses to improve the defects and deficiencies of his own theory.

Luo Hai is an expert in air combat skills and close-range combat, but for the theory of aerodynamics and flight theory, Luo Hai is a novice, far inferior to real experts.

There is no end to learning, Luo Hai will never give up any opportunity to learn, the so-called belly is full of goods, when communicating with other pilots and aerodynamics experts in the future, Luo Hai can at least say two sentences, right?

About forty days later, Yan Liang was going to hold an exchange conference, and Luo Hai, who got the invitation, would never give up such an opportunity, and when the time came, he would be able to greatly increase his knowledge and broaden his horizons.

Luo Hai, who is a down-to-earth person, learns honestly, and seeks stability rather than speed, walks slowly step by step on the two roads of aerodynamics and aero engine science.

"If the flight elevation angle is too high, it will enter the stall, and it is difficult for the second-generation and third-generation aircraft to get rid of the situation that the elevation angle is too high and enter the stall, in which the wing aerodynamic disturbance vortex, and the aerodynamic balance of the fuselage surface will be broken, and the pitch moment and longitudinal moment of the fuselage will also be out of balance. So, in addition to the stall state, in the case of the J-10B, what airflow can affect the surface of the fuselage after the loss? ”

Holding the fountain pen that reflected the light, Luo Hai frowned and muttered softly.

It's a seemingly simple but very elusive problem, just like all aerodynamics experts and pilots know about high-altitude turbulence, you know there's high-altitude turbulence, but you can't see it, you can only touch it.

The fighter has a limit on the attack elevation angle and the depression angle, and if the flight enters beyond the limit of the attack elevation angle, the pitch moment balance of the aircraft will be unbalanced.

The thrust generated by the operation of the aviation turbofan engine is like an accomplice to assist the body that has lost the balance of the pitching moment, causing the entire fighter to fall into a dangerous stall state, and then extend to an even more dangerous tailspin.

If a fighter plane flies at an altitude of only more than 3,000 meters and falls into a dangerous state of stall and cannot be changed in time, then it will crash within a few seconds, resulting in the tragedy of plane destruction and death.

For such a problem, Luo Hai is very curious, if he can detect all the air currents that affect the aerodynamic layout of the fuselage surface, then Luo Hai will be more handy in controlling the fighter in the future, and greatly improve his combat effectiveness.

However, for the study of aerodynamics, Luo Hai needs a huge computing system and theoretical foundation, and can only continue to study in depth after establishing relevant mathematical models, and also needs hardware support from a series of related equipment such as wind tunnels and supercomputers.

"To put it simply, the generation of airflow is very complex and is affected by various weather, temperature, humidity, and air temperature decline rates; Surface temperature difference, air pressure, and equal number jù influence. The general belief is that the greater the rate of decline in air temperature, the more sunshine and the drier the air, the better the formation of thermodynamic airflow. Gently putting down the Hong Kong dollar, Luo Hai sat on the stool like a rock, closed his eyes and thought slowly: "So, can I master the air flow?" In other words, to know the direction of flow of all airflows? ”

Airflow is, in other words, aerodynamics, the heart of aerodynamics. Luo Hai's idea of mastering air currents mainly means mastering all the directions of air flow movement in the entire sky, from the fugitive layer to the surface.

However, this is impossible, and the idea is as impossible as traveling through time and space. The volume and mass of the entire earth's atmosphere are hundreds of billions of times that of Luo Hai, and if Luo Hai really reaches the realm of mastering the entire earth's atmosphere, then Luo Hai can simply be called a god.

Building a mathematical model for simulation is a very effective practice that is not useful in today's situation.

Even if Luo Hai obtained 100 supercomputers made of superconducting materials, he would not want to obtain all the air flow movements and flow directions of the entire Earth's atmosphere.

"It's kind of unrealistic." Luo Hai smiled lightly, shook his head and abandoned the whimsical thought in his mind:

"The air flow moves up and down, and there are two types of updrafts and downdrafts, and the updrafts are divided into many types such as dynamic airflow, thermal airflow, and mountain wave flow. When the entire fighter is flying, it will be affected by high-altitude turbulence of a dynamic nature, or the airflow on the surface of the body when the aircraft is flying at high speed.

"At the same time, there are also situations such as transonic regions and high subsonic speeds. Forget it, I don't want to think too much, for the time being, I can do theoretical deduction and computational simulation at most, and I can't study it at all without the support of wind tunnels and models. ”

After thinking about it briefly, Luo Hai shook his head slightly, and after writing down his new ideas and ideas on aerodynamics, Luo Hai summed up the advantages and disadvantages according to his recent combat experience and characteristics, and then extended it to this paper on aerodynamics and aero engine science.

Time passed slowly like flowing water, and after lunch, Luo Hai continued to study his thesis.

At around three o'clock in the afternoon, the smartphone on the surface of the table rang, and after Luo Hai answered Guò, the voice of the old bird came from the other end of the phone: "Mumbai Dubai Airport, at the entrance of Terminal 1, see you in 1 hour." ”

PS: Recently, writing books has entered a bottleneck, and I am silently trying to break through.