With an inquiring heart, Zhuang Jianye searched in the archives for a long time, but did not find the reason why Yonghong Factory did not continue to produce "Spey" turbofan engines.

He simply didn't look for it, he didn't come to do the history of the factory, even if he figured it out, he wouldn't give a salary increase, so why bother, anyway, he knew that Yonghong Factory had the technical strength to produce key components of the "Spey" turbofan engine, so why do you care so much.

So Zhuang Jianye began to sort out his file again, and the result was a big one, a meeting minutes stored in the cabinet of Document 17, and the word "secret" was still marked on the kraft paper file bag.

Zhuang Jianye's heart beat wildly a few times when he saw it at that time, he had never seen such a high-end thing in his two lives together, and he wondered if he should report to the director first, after all, the documents with the word "secret" are quite big.

But before he could put this idea into practice, he saw a line of standard stamped handwriting in the lower right corner: "The confidentiality period has expired, please file it separately." ”

After checking it again, I saw that it was a file from 1971, and the secrecy period was 10 years, and more than a year had passed, so I was relieved and no longer opened it politely.

I pulled out the thick minutes of the meeting inside, and I couldn't pull it out anymore when I looked at it.

It turns out that the above record is a little-known history, which happened in 1970, when a large plane of a certain country crashed in the X Territory, and the plane burned to the ground.

After diplomatic consultations, the country agreed to provide technical information on the factory of the crashed aircraft, and with the approval of the higher ministries and commissions, the Yonghong factory was instructed to organize a group of experts to rush to the X Frontier to remove the engine from the crashed plane and transport it back to the factory.

An air crash has long been the unprecedented luck of Yonghong Factory, which gave them the luck of unplaning and mapping large aircraft aero engines for the first time.

Therefore, the factory immediately set up a high-power turbofan engine leading group, and set up a surveying and mapping design group.

At that time, it was still in a special period, and the working class led everything, so Xue Ronggui, the director of the second branch factory, was the leader of the surveying and mapping design group, and Ren Qingxiang, the first chief engineer of the Yonghong factory, was the deputy team leader, and his father-in-law Ning Zhishan was only the office director of the group at that time, responsible for logistics work.

Today's chief engineer He Ming can't even be the deputy team leader, so he can only be the director of the surveying and mapping office, and Qiao Chenyu is just a technician.

It can be seen that the surveying and mapping design team at that time was full of talents, including almost all the elites of Yonghong Factory at that time.

However, the establishment of the surveying and mapping design team that gathered the elites could not change the backward scientific research conditions at that time, and there was no special surveying and mapping site in the factory at that time, so the finished product warehouse could only be vacated as a place for engine storage and surveying and mapping.

In order to keep secret, the soldiers of the army stood guard at the door day and night, the windows did not dare to open, and in summer the warehouse was stuffy and hot, and the temperature exceeded forty degrees Celsius.

Of course, the harsh environment is nothing, gritted your teeth and survived, the key is the engine itself, there are more than 20,000 parts, so the people who set up the surveying and mapping design team must first figure out the main structure of the engine, and then the material situation, assembly process, processing alternatives for supporting finished parts, electronic systems, lubricating oil systems, bearings and so on.

In addition to this, all of these parts are converted from imperial to metric.

All in all, the turbofan engine used in such a large aircraft is too complex, an iron bird that flies steadily in the sky for hours, a flying machine that must take off and land safely countless times, and its complexity has reached the pinnacle of human ingenuity with steel as muscle and fuel as blood heart.

But it was man, not God, who designed and built it, and the whole process of converting energy into supersonic flight power is so mysterious that people worship it.

There was only one set of samples, which was very valuable, and had to be reassembled for engine testing, and must not be destroyed.

Dozens of people in the surveying and mapping design team have set up more than a dozen professional teams such as turbines, compressor shafts, discs, blades, combustion chambers, flame cylinders, casings, tail nozzles, and complete sets of finished parts to survey and map parts respectively.

The Metallurgical and Chemical Group is responsible for the analysis and assay of various metallic and non-metallic materials, as well as the study of heat treatment and performance treatment processes.

In this way, it took more than a year to complete the mapping of the modified turbofan engine and the compilation of all technical data.

You must know that at that time, in a special period, when the vast majority of industrial and mining enterprises were completely paralyzed, under such circumstances, Yonghong Plant was able to complete the technical mapping of turbofan engines, which has to be said to be a miracle.

However, just when Yonghong Factory was preparing to prepare materials for the next step of the specific development of turbofan engines according to the technical data that had been changed, the central ministries and commissions at that time issued the task of developing large passenger aircraft to H City, that is, the well-known "Yun 10" project in the country.

The project was commanded and coordinated by the central ministries and commissions, and 262 enterprises and units from 21 provinces and cities across the country participated in the development.

Ren Yongxiang, who served as the deputy head of the surveying and mapping design team and was also the chief engineer of Yonghong Factory, received an urgent order from the ministry, asking him to rush to H City to participate in the development of the "Yun Shi" project.

The high-power turbofan engine, which was regarded as a treasure by Yonghong Factory, also set off from the railway freight station in the factory, and was escorted to H City together with tens of thousands of materials such as parts drawings, tooling drawings, metallurgy, technology, and final assembly obtained from surveying and mapping.

The results of the whole Yonghong factory have been busy for a year and have been taken away so hard, not to mention, the chief engineer of the technical core has also been poached, saying that it is a chicken and an egg, and it is not an exaggeration to lose his wife and soldiers.

This incident hit the Yonghong factory very hard, many people were discouraged and transferred out of the Yonghong factory, and the cadres and workers were not interested in tackling key scientific research since then, and felt that even if they made it out of it, they would make wedding dresses for others, so why be thankless.

These emotions abound in the minutes of the meeting later, although the text is written more obscurely, but Zhuang Jianye can still feel the grievance and resentment between the lines.

"Maybe that's why the factory is focused on transforming civilian products. ”

Closing the file, Zhuang Jianye sighed, and vaguely understood the reason why Yonghong Factory did not become a "Spey" turbofan engine manufacturer, it is estimated that the situation is similar to that of large aircraft, but there are no such detailed records to confirm.

To be honest, whoever was picking peaches on the stall would be angry, including him Zhuang Jianye, and because of this, Zhuang Jianye put down the minutes of the meeting and continued to rummage in the 17th document cabinet, not for anything else, just to find some information left over from the beginning.

Even if they can't bear the heavy responsibility of large aircraft, they must let people know that the ancestors of Yonghong Factory have struggled, worked hard, and worked hard to launch the aircraft, even if they are excluded later, but they can't erase their contributions.

I can't be the master of the development of large aircraft, but I still have the ability to show these files to the world.