The days in Chengdu are tense every day, and this Spring Festival, everyone has no holiday and continues to stay in the factory to work overtime.

Qin Feng didn't want to go home, if he went back, his mother would definitely ask his daughter-in-law about it, and his father would knock his head with a smoking pot, and he would still stay in Chengdu and study fighters every day, so it would be enjoyable.

The tape recorder for my sister had already been bought, and I sent it back through the post office, and Qin Feng was also encouraging my sister to study hard and master scientific and cultural knowledge, so that she could better build the motherland in the future.

The Spring Festival had just passed, and sure enough, the notice from the superiors had already arrived, and Qin Feng and the four comrades from the 611 Institute got on the train together.

"Fortunately, I bought the tickets in advance." Lying on the sleeper, Qin Feng was palpitating, looking at the platform outside, there were people crowded everywhere.

"Be careful, don't open the window!" Seeing a passenger pushing the window and looking out, the conductor suddenly shouted nervously.

As long as the windows are opened, they can't be closed, and the passengers outside will not hesitate to get in through the windows, and their skills are very agile, like monkeys, and they can't push down.

Now, it's the peak of the Spring Festival!

Qin Feng has also experienced it more than once, the carriage is full, the people outside are still drilling inside, many people will climb the window, and the people inside the window will also use their feet to kick out, it is like a battle, but the people outside will still climb in, as long as they can come in, they will not bother who kicked themselves, as long as they can get on the train, they will be satisfied.

At this time, in the hard-seat car in front, such a scene is constantly staged, this side is the sleeper, the sleeper car area, it is relatively stable.

The heating in the carriage is very hot, this is a long-distance train to the capital, where the weather is freezing and the trains are heated, and at the door of each carriage, there is a coal-burning boiler, which is very warm.

In Chengdu, the winter is all about being upright, and after getting in the car, everyone took off the military coat.

Qin Feng took out a wooden model from his luggage, held it in his hand, and looked at it carefully, when he saw the model in Qin Feng's hand, Song Lao was also stunned: "Qin Feng, what are you doing with it?" ”

During this period of time, Song Lao was busy coordinating the allocation of funds for the J-7III by the Air Force, especially the purchase of another MiG-21MF from Egypt.

In China, when developing an airplane, a wooden model is a necessary step, by making a wooden model, you can give people an intuitive impression, how the aircraft is, how to assemble various parts and so on.

In another 20 years, with the large number of applications of computer design, it is possible to use computers directly to simulate assembly, and this step of wooden models can be regarded as omitted.

"Research." Qin Feng said: "Anyway, it's idle to do, we already have a lot of reserves for the development of the new J, and we will also take it this time, what if the high-level can be interested?" ”

Song Lao could only shake his head helplessly, this meeting has nothing to do with us, we are just a foil, the topic of this meeting is to review the J-13 project, what does it matter to us?

"We have two plans, one on both sides and one on the belly, how do you bring this model?" Elder Song asked Qin Feng.

"The third-generation aircraft, the pursuit of large angle of attack performance, so I think the belly air intake is definitely a future direction, both sides of the air intake, once turning, one side of the air intake is easy to be blocked, in the nose of the J-8, because of this reason caused by the engine stop, are commonplace." Qin Feng said: "Since we want to engage in pre-research, of course we must start higher. ”

Now, he used to be a foil, but Qin Feng was full of interest, Song Lao looked at this model, and secretly sighed in his heart, yes, if he could develop such a fighter, how good it would be!

There are too many deficiencies in the country, and if you want to develop a fighter, you can't do without a good engine, but now in China, there is no engine suitable for the use of third-generation aircraft!

"Qin Feng, do you know about Shenyang's turbofan-6?" Song Lao asked suddenly.

Originally, the turbofan-6 was for the J-9, but after the J-9 project was launched, this project also cast a shadow.

However, Shenyang is also working hard to promote this project, and while the turbofan-6 continues to be refined, they have also developed an improved turbofan-6 version based on the WS6.

The improvement work is mainly to increase the maximum afterburner thrust of the engine to 138.2 kN, the maximum thrust to 83.3 kN, the thrust-to-weight ratio to 7.05, the performance has been greatly improved compared with the WS6, and the reliability, maintenance and fuel consumption rate remain unchanged under the condition of keeping the original engine dimensions unchanged.

If you want to have a qualified fighter, you must have a qualified engine, and now, looking at this model of his own, Song Lao is also thinking about what engine it should use.

Qin Feng remembered going to the Shenyang Liming Factory, thinking of the swarthy engine on the bench, which was even laborious to start, and shook his head incessantly, this engine, if it wants to mature, I don't know how many years it will take, if you really build a new annihilation, it is better to focus on the turbojet-15, this mapping imitation MiG-23 engine, it is easier to succeed.

Looking at Qin Feng shaking his head, Song Lao also smiled bitterly, in terms of the aviation industry, the country is much behind the world's advanced level! Until now, not only did there be no advanced turbofan engine, but even the turbojet engine at hand was not very reliable.

Take the current mapping and imitation of the MiG-21MF as an example, even if the 132 factory has now begun to cut materials and produce the prototype of the imitation, the mapping and imitation of the engine of this fighter by the brother enterprises has not yet been completed, and it is said that it may not be built this year.

In this case, the test flight of the J-7III will definitely be affected, and if we have no choice but to install the engine imported from Egypt, conduct a test flight first, and wait until the engine is perfect before replacing it.

It is so difficult to even copy a turbojet, and it is always faced with the situation of engines such as airplanes, not to mention the engines of advanced third-generation aircraft.

Climbing the edifice of the world's advanced aviation technology, the road is still far away.

From Chengdu, it took a day and a night for the train to swing to the capital, and at this time, everyone seemed to be scattered.

After taking tired steps, I finally entered the guest house of the General Staff, and everyone hoped to sleep soundly as soon as possible, even if it was a sleeper on a train, and the local staff had been on the ground for a day and a night, but now the steps were unsteady, and the sound of the train was still in my ears.

However, as soon as he sat down, Song Lao ushered in a guest.

。 m.