Everyone laughed happily when they heard this, but Bayuzao replied in panic: "Thank you very much for the emperor's praise. The people must do their best to share the emperor's worries for the country."

Song Biao nodded slightly. Since this aircraft was basically impossible to be used in World War II, he didn't need to pay too much attention. It was good to take off and serve, but if it couldn't serve, the empire was not in urgent need for the time being. He pointed forward and signaled to everyone.

People accompanied him to the front to visit.

Along the way, Song Biao also took this opportunity to inquire with Bayuzao and other senior engineers about some new technologies and some of the main obstacles in the domestic aviation industry at this stage.

Generally speaking, the biggest obstacle currently comes from the field of materials.

Thanks to the long-term cultivation of Project 201, the empire's research level in the field of materials is about ten to fifteen years higher than that of Britain and the United States. Even so, as the empire begins to enter the development stage of higher-level turbofan fighters,

Basic industrial research still shows some shortcomings.

For example, for the rear axle of the high-pressure shaft of the high-pressure compressor, the 3-chromium-molybdenum single crystal steel used in the J-6 turbojet-5 engine is not very suitable, but this is already the current domestic standard in pressure resistance, high temperature resistance and

The material with the strongest corrosion resistance, this shaft steel also involves a more complex material selection issue for the turbine high-pressure shaft.

Why is it said that the F-15 can only be successfully developed in the 1970s? There are many problems. The biggest restriction is materials.

As for whether it is okay to use 3 chromium molybdenum single crystal steel for hardening?

Yes, absolutely ok, but its temperature is too high, the corrosion resistance and resistance coefficient under high temperature and pressure are not up to standard, and the overhaul time and total life will be very short. It will take two hundred hours... or even one hundred hours to replace it.

.

Why were aircraft developed so quickly and built so quickly during the war?

A very important reason is that the material considerations are small and the lifespan is short, because the probability of the fighter 70 produced during the war did not exceed two hundred hours of life.

It should be said that the scale of the empire's research investment in the field of materials is still very astonishing. The state and enterprises have combined with each other. The total scale of R&D investment in the past twenty years is more than the United States, the United Kingdom and the United Kingdom combined. In the entire materials discipline, metal is only

A very small part, such as semiconductors, rare earths, plastics, silicon, chemical fibers, graphite and carbon fibers, ceramics, resins... and other materials, Empire occupies a high international advantage in the research of the entire field of large materials.

Materials and fuels are the basis of the entire world industry.

If the materials cannot be uploaded, there will be no need to discuss anything.

These problems encountered during the development of the J-7 are enough to show that there is still a lot of room for development in the Empire's research in the field of materials science, and there are still many problems that need to be overcome.

Song Biao spent the whole day at Shenfei Company. In addition to inspecting the development projects of J-7 fighter jets, S-20 large turbofan transport aircraft, and SU-5 high-altitude and high-speed reconnaissance aircraft, he also inspected the development projects of Shenfei Aircraft Company.

There are several other ongoing development projects of the Aircraft Company.

In the past few years, J-5 series Tiger Shark fighter jets, J-6** fighter jets, S-10\15 transport aircraft and their series of aircraft, and the first-generation Z-3 helicopter that was officially put into large-scale service in the Army were all Shenyang aircraft.

The company's representative products.

Because production capacity cannot keep up with demand, the production of J-5 Tiger Shark series fighter jets has been subcontracted to Taiyuan Aircraft Manufacturing Company, Tianjin Aviation Machinery Company and Beijing Aircraft Engineering Machinery Company. Shenyang Aircraft Headquarters focuses on the production of J-6, and other companies Spare parts are also produced according to standards.

The S-20 large turbofan transport aircraft project is currently still competing with the S-30 project of Jiangnan Fudao Company. Both parties are striving to launch a real prototype first, but the problems of both companies are the same, and both parties are subject to for each other's turbofan engines.

The earliest turbojet engine in the Empire was born at Jiangnan Fudao Company. At that time, it was a relatively simple centrifugal structure. Later, after the axial flow design structure was introduced from Germany, the first generation of axial flow turbojet was designed and produced by Northeast Heavy Industry. After that, Jiangnan Fudao cooperated with Fuzhou Heavy Industry to produce the second-generation single-rotor afterburning axial flow turbojet engine, while Northeast Heavy Industry used a dual-rotor afterburning axial flow turbojet engine. The road thereafter followed Completely different.

In the process of researching turbofan engines, Jiangnan Fudao and Fuzhou Heavy Industries parted ways. The former adopted a single-rotor front fan afterburning axial flow turbofan engine and adopted a high-pressure ratio design, while the latter adopted a single-rotor rear fan afterburning axial flow low-pressure ratio design. In terms of design, Northeast Heavy Industry adopts a dual-rotor afterburner front fan high-pressure ratio design.

This allows the Empire to have three different turbofans at the same time. In the S-30 plan launched by Jiangnan Fuda Company, Jiangnan Fuda directly selected turboprop engines, while Shenyang Curtis Company, a subsidiary of Northeast Heavy Industry, continued to use turboprop engines. Fan engine, this is because the S-20 plans to transform into a bomber and directly become a new generation of long-range bomber after transformation, while the latter plans to transform into a large passenger aircraft.

In fact, both companies feel that they are on the wrong track, but this is also a problem of thinking and prediction that will be encountered during this era. Whether it is Northeast Heavy Industry, Jiangnan Fudao, or Fuzhou Heavy Industry, the three aviation industry giants are not Think jetliners are necessary.

From this point of view, the S-15 of Northeast Heavy Industry is indeed the last generation of propeller transport aircraft in China, and the double-row 24-cylinder radial air-cooled engine it uses has also reached the ultimate level of propeller transport aircraft. The huge body and aviation fuel The carrying capacity also makes it the first large transport aircraft that can fly directly across the Pacific Ocean and across China and the United States.

If all goes well, the current research and development plans of the empire can be successfully completed before 1945, and the overall level of the empire's aviation industry will completely surpass that of Europe and the United States, which is roughly equivalent to the level of Britain and the United States and other countries around 1955, and the fastest The British Rolls-Royce Company did not start developing the first-generation turbofan until about 1948, while the Empire was about ten years earlier.

Ten years ahead, this cycle is very important.

Of course, as soon as these secret development plans of the empire are made public, Britain and the United States will definitely accelerate the pace and launch relevant projects to compete with the empire. Then they will be able to realize this plan almost before 1950.

In general, the overall technological level of the empire at this stage has a lead of more than five to ten years compared with the United Kingdom, Germany, the Soviet Union and other countries. The largest lead is in the electronics, semiconductor and missile industries. These fields are indeed very powerful, but they are also There is a very close relationship with the samples from a certain base.

After Song Biao inspected the Northeast, he has been thinking about a question, that is, whether this advantage can be expanded.

The easiest way is definitely to continue to increase investment in scientific research. What else?

Song Biao's thinking is that there is no other more effective method. Scientific research is the pillar of human progress and the pillar of national progress, and the source of this pillar is education.

At this stage, the scale and proportion of investment by the Chinese government and enterprises in the field of scientific research have reached the limit under normal circumstances. The investment by the Chinese government and enterprises in scientific research and education is the highest level model in the world, even if

Nor can it compare with the United States. In terms of investment ratio alone, Germany's investment ratio in education and scientific research is at the same level as China's. China's strength over Germany lies in its larger economic aggregate.

To further promote the development of education and scientific research in China, the only force that still has room to speak of is social institutions.

Among social institutions, the Royal Academy of Sciences and the Inner Court Educational Research Society are undoubtedly the most powerful. In the past few decades, the royal family has indeed spent a lot on education and scientific research in China, but a huge part of the investment has been concentrated in nuclear power.
Chapter completed!