By the time he arrived at the Guichang Aviation Machinery Factory, he already knew that the turboshaft engine had completed its first test run four days earlier and had been a complete success. In addition, the engine was transported back to the final assembly shop from the test shop immediately after the initial test run, and disassembled into a parts state.

The reason for this is that the experts carry out a rigorous inspection of each part of the turboshaft engine to see if there are any changes and problems with each part after passing the test run.

If a problem is found, it is necessary to analyze it, find out the cause, call experts for analysis, find ways to improve, and replace these problematic parts.

If there are no problems, reassemble it and continue experimenting.

Of course, it is impossible for all parts to have problems, even if the design is scientific, the parts processed by the workers are accurate, there are always some parts that will have such and such problems, as long as there is no problem with the key components, as long as the problem is not serious, it will not affect the next step of the test, at most it is the design of the parts or the improvement of the process.

If there is a critical problem, if there is a serious problem, then it cannot be done by improving the design and process of the parts. Perhaps it would be much more troublesome to improve the principle of the engine, to change the manufacturing and assembly processes, and to change the materials. It's definitely not something that can be done in a short time, and sometimes it's even more cumbersome and time-consuming than developing a new engine.

The disassembly of the turboshaft engine was much faster than the assembly of the engine, which took nearly ten days to assemble, but the disassembly took only about ten hours.

When Jiang Xinwei arrived at the assembly workshop, he saw a pile of parts.

The parts have also been carefully cleaned and cleaned, and they are sorted by component and arranged in different areas. It looks unusually neat and shiny.

For example, the parts of the booster part are neatly placed in one area, the parts of the combustion chamber part are placed in another area, and the parts of the turbine part are placed in a further area.

Inspectors not only perform visual inspections of parts to see if the surface is overworn, sintered, torn, but also take precise measurements of dimensions to find manifestations that are difficult to detect with the naked eye, and sometimes they have to metallographically analyze the parts.

Although Jiang Xinwei is an expert in the research and development of telecommunications equipment, he is not a layman in mechanical equipment, when he was designing vehicles in Chuncheng Automobile Co., Ltd., he made up a lot of mechanical design knowledge, and also took time to study automobile engines.

Although turboshaft engines are very different from automobile engines, they are not mechanical, and some of the time they are somewhat similar.

However, he did not participate in the inspection, nor did he ask the experts, but stood silently by the side, watching the other experts test, watching them wear thin white gauze gloves, holding magnifying glasses, and looking at the appearance of the parts one by one very seriously.

Only Ma Jin, a well-known aviation expert in the country and chief engineer of the Guichang Aviation Machinery Factory, came up with a little curiosity when he inspected the turbine disc.

Ma Jin said to him while inspecting, "...... Before the test, this turbine disc has the metallic luster of superalloy, which is very bright. However, after the test run, after experiencing a high temperature of more than 1,000 degrees, the surface color of the parts has changed slightly, and it has reached the current state. ”

Jiang Xinxu asked, "Is this normal?"

Ma Jin didn't rush to answer, but continued to look with a magnifying glass, staring at one of the tongues and grooves for a long time, and then said: "The color changes are normal, at least within the normal range, these size and shape changes are normal, better than I expected." …… The batch of superalloy materials developed by Ye Shuwen and Morozov is very good, which solves our big problems. ”

Ye Shuwen and Morozov are the general managers and chief engineers of Shiding New Material Technology Company, which is also controlled by Jiang Xinwei.

Jiang Xinxu smiled and said, "That's really good." Mr. Ma, can our turboshaft engines be used in our military helicopters? Can they pass the military's acceptance?"

Ma Jin smiled and said, "I think it's okay." But the end result is not up to me, and if they have any new requirements from the military, it will be difficult to say. Besides, we have only done the first test drive, and we have not yet gone through a long test run, and there are no problems in the future, so I don't dare to pack a ticket. The last prototype test was a long test run and there was a problem. ”

The Guichang Aviation Machinery Plant has already conducted a test run of a sample engine, but the result failed. This time, it was redeveloped and produced after that failure.

Jiang Xinxu asked, "What was the reason last time?"

Ma Jin said: "There are many problems. One of the most critical issues is the flame tube. You know the flame barrel doesn't look at the round thing over there, with a lot of little holes in it, yes, that's it! It's the key part of the combustion chamber, it's very thin and light. Its surface is coated with a thermal barrier coating, which can withstand higher temperatures and has a long service life, which is a new design that has been jointly researched and innovated by many experts in our factory. But the last test run was precisely because it had a problem, and there was severe flame ablation, which led to the failure of the first test run. ”

Jiang Xinxu sighed and asked, "Why does flame ablation occur?"

Ma Jin replied: "The main reason is that this part is not cooled well, which leads to the high local temperature. This time, we called in experts to make design improvements, focusing on improving its cooling performance. ”

He then spoke of specific technical solutions: "...... First, we have applied a thermal barrier coating to it, that is, a special high-temperature resistant material is coated on the surface of the flame cylinder, and this layer of material does not conduct heat and can be well insulated. Second, we have adopted air film cooling, which is to try to form a layer of high-speed blowing air protection film on the surface of the flame cylinder, which can not only isolate the flame, but also blow away the heat, and play a good cooling and protection effect. It is through these two very advanced and very reasonable methods that the temperature of the flame barrel meets the design requirements. This time it was tested, and it never had the same problem as last time. ”

……

After intense and meticulous inspection by the experts, they found many minor problems, but they were all effectively solved.

After that, they worked overtime overnight to reassemble the turboshaft engine and conduct a second test run.

The turboshaft engine started smoothly, and soon it entered the normal power output state, and the relevant data of the engine was also presented on the computer screen.

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