"Director Zeng, now most of the single-exhaust cooled star engines are seven-cylinder, no matter how many cylinders there are, the engine length is too large, which will have a greater impact on the volume and flight ability of the aircraft. And the more cylinders, the greater the power of the engine, to develop a more powerful engine, now it seems that the only way to increase the number of cylinders of the engine. ”

"I wondered if we could change the way we arrange a single row to a double row, or even a quadruple row. Take the more mature seven-cylinder engine as an example, the number of cylinders in the double-row arrangement is fourteen, and the four-row is twenty-eight ......"

Seeing Zeng Yijing, who was flushed with excitement, his hand holding the sketch was already trembling with excitement.

In order to hide his unbelievable "genius" idea, Song Zhewu pretended to be uneasy and said: "Director Zeng, is this idea of mine inappropriate? ”

In order to play more realistically, Song Zhewu said in a slightly cramped tone: "In terms of engines, I only know a little, compared to you as an expert, I am a layman, if my idea is not appropriate, you can just say it." Moreover, I am only suggesting that we should focus our research on air-cooled multi-row star engines, not to say that water-cooled engines should be completely abandoned, after all, water-cooled engines are more advantageous in heavy bombers and transport aircraft. ”

"No, yes! No...... Inappropriate. ”

Zeng Yijing was a little incoherent with excitement.

Although Ba Yuzao, Wang Zhu and Wang Xiaofeng are not experts specializing in engines, their profession is inextricably linked with engines, and they also know engines very well.

Song Zhewu's plan is not only feasible, but also absolutely very advanced in terms of design concept and principle, if the development is successful, the power of the engine will definitely increase exponentially, which they can see.

Including some other experts and engineering and technical personnel, they were all the same as Zeng Yijing, Ba Yuzao and others, not only excited, but even looking at Song Zhewu's eyes, they all showed extreme surprise and admiration.

In today's world, the most advanced aero engine was calmly drawn by a senior military commander, which cannot but make everyone feel extremely shocked!!

Zeng Yijing, who calmed down a little, looked at Song Zhewu excitedly and said with great reverence: "Commander, I don't think your design is inappropriate, but absolutely feasible, if we try to produce this engine, it will definitely be the best in the world, and it is also an aero engine that can achieve the greatest power!" ”

Trying to calm down his excitement, Zeng Yijing asked a little unwillingly: "Commander, to be honest, have you studied professional technology in aero engines?" ”

Song Zhewu had long thought about what kind of results would happen once he came up with this design plan, which was what he was most afraid of and the most helpless. Although he is now accustomed to making up nonsense, it can be said that his face is not red and his heart is not beating, but it is inevitable that he will be worried in his heart.

Therefore, for Zeng Yijing's questions, and even everyone's questions, Song Zhewu was very "modest" and answered calmly.

"Where to talk about what to study, it's just to dabble."

Song Zhewu glanced at Xiao Guodong from the corner of his eye and said: "When I was in Berlin, although I studied military affairs, I was also influenced by my father, and I knew that the revitalization of the country would not work without strong industry and technology, so I was very interested in all aspects of scientific and technological knowledge, and I had to take a look at all kinds of books, so I also knew a little bit about all aspects of knowledge." ”

"Know a little bit about Mao?"

Zeng Yijing smiled bitterly and said: "If the commander only knows a little about the surface, then we can't be called experts anymore, and we should all go back to school to continue studying." ”

Song Zhewu didn't want to continue to dwell on this issue at this time, he also had a few "unique advanced technologies" that greatly increased engine power and surname energy, since every time he had to arouse the amazement of these people! Long pain is better than short pain, and the surname Suo will be handed over to them together.

Song Zhewu secretly gritted his teeth, and in the eyes of everyone's incomparable reverence, he took another piece of paper, brushed the ground and wrote and drew on it.

This time, Song Zhewu gave the exhaust gas turbocharger, variable pitch propeller technology, sodium metal cooling exhaust valve technology, cylinder water injection and methanol mixture technology, high-octane fuel surname, etc., several aero engine technologies that have not yet appeared.

The exhaust gas turbocharger can increase the intake pressure in high-altitude conditions and improve the high-altitude energy of the engine.

At this time, the flight altitude of the best aircraft did not exceed 10,000 meters, and the combat altitude of several of the most advanced aircraft was limited to less than 8,000 meters. The reason is that the engine is at an altitude of more than 8,000 meters, and the power will be greatly reduced.

Engines with exhaust gas turbochargers installed can be significantly improved above 8,000 meters.

In Song Zhewu's memory, the engine with the exhaust gas turbocharger installed had a maximum restricted altitude of about 15,000 meters, which is almost double the altitude of various aircraft in the world today. Such a height is definitely a height that the other party can't reach.

Imagine what kind of helpless scenario it would be if one side saw the opponent's fighter plane flying high above it in the air, but its own plane could not fly to the same altitude to attack the opponent, and the opponent could hit and run at any time.

Variable pitch propeller technology increases the efficiency of the propeller and the power output of the engine; The cooling exhaust valve filled with sodium metal solves the problem of overheating of the exhaust valve; Spraying a mixture of water and methanol into the cylinder can increase the power by one-third in a short time; The high-octane number fuel improves the anti-knock surname of the fuel, so that the pre-combustion pressure in the cylinder gradually increases from 2~3 to 5~6, or even 8~9, which not only improves the liter power, but also reduces the fuel consumption rate......

For these techniques, Song Zhewu really only knows a rough idea, and it is not an exaggeration to say that he only knows some fur.

However, Song Zhewu believes that it is enough for him to only put forward these ideas, and the rest of the experimental development needs to be explored step by step, and he believes that these experts in front of him can definitely solve it.

Moreover, even if he knew these techniques very well, he didn't dare to take them out in detail all at once, if he really came up with a detailed plan, it would be really shocking.

Song Zhewu believes that with these advanced and exclusive technologies, if the secrecy technology is done well, his aircraft will definitely be the most advanced in the world before the middle of World War II, that is to say, his aero engine technology, and even aircraft design and manufacturing technology, will be at least ten years ahead of the world.

Song Zhewu decided not to give Zeng Yijing, Ba Yuzao, Wang Zhu and others a chance to ask questions because they were surprised, and continued to shake out the fierce news.

"You must have seen the aviation diesel engine technology developed by Dr. Junkers that we bought from Germany this time."

Zeng Yijing, who had not yet recovered from the shock and excitement, nodded and did not speak.

"Although this technology is not very mature now, this engine is a reversed piston engine type, two-stroke cycle method, pressure injection fuel, and the use of electric spark ignition, the structure is simple and efficient, if it can be improved, it will definitely get more power than gasoline engines."

"Especially the diesel engine, it is not only more efficient and fuel-efficient than the gasoline engine, but diesel as an aero engine has one of the most obvious advantages, that is, it is not easy to catch fire in the air after being shot, which can greatly improve the survival chances of our aircraft and pilots.

"Juncker's engine, which I saw at the Berlin International Air Show in 1926, was really good, and the model he showed was FO3, which produced 830 hp at 1,200 rpm," he interjected. However, because of its size and weight, it is not suitable for installation on an airplane. However, the improved FO4, which appeared in 1928, was redesigned with six smaller cylinders and was tested on the Junkers F24 all-metal monoplane. After that, it was not widely used, and there should still be a problem of excessive weight. ”

"Despite this, I completely agree with the commander's opinion that aviation diesel engines have great potential for development in terms of technical capabilities, and they are indeed worthy of our in-depth research and development."

Ba Yuzao looked at Wang Zhu. Zeng Yijing, Wang Xiaofeng, and others asked in an inquiring tone: "I suggest that in the first five-year plan, our Aviation Research Institute should focus its research on aircraft on the three types of fighters, attack planes, and reconnaissance planes, and at the same time focus on the development of air-cooled multi-row star-shaped high-power engines in terms of engines, and develop a variety of derivative models as much as possible. At the same time, it also takes into account the development of water-cooled engines and the development of new diesel aero engines based on Junkers aviation diesel engine technology. What do you think? ”

Several people excitedly agreed.

Song Zhewu nodded and said: "Regarding the issue of high-strength alloy steel used in all-metal structure aircraft, the Iron and Steel Research Institute is now conducting research and trial production based on the alloy patent technology we purchased from Europe and the United States this time. Although it is not possible to come up with high-quality alloy steel that is ahead of the world for the time being, it should not take a long time to manufacture ordinary alloy steel, and it will meet our needs for developing aircraft in a short time. ”

"The three 5,000-ton die forging hydraulic presses we purchased this time will be handed over to the Machinery and Equipment Research Institute for research and imitation, and the other two will be handed over to your aircraft factory and Wang Dong's special vehicle factory. You have to make good use of it, not only high-strength steel can be pressed with it, but aluminum alloy skin can also be pressed with it......"

Seeing that the goal had been basically achieved, Song Zhewu took advantage of the opportunity that Zeng Yijing and others were still excitedly studying these advanced technologies thrown by Song Zhewu, and Song Zhewu hurriedly said goodbye to Ba Yuzao and others.

(To be continued)