Take Off My Aviation Era

Not only Li Fang, but Song Changzheng also stared at Qian Qiang with wide-eyed eyes, but after all, he was older and more experienced than Li Fang. He was not as surprised as Li Fang’s performance, but asked: "Is it theoretical value or Actual value?"

"What is the theoretical value and actual value?" Qian Qiang looked at Song Changzheng very puzzled: "The gas turbine power of our Ascendas Aviation Power is based on actual usage and through real tests. Compared with Aviation power manufacturers such as General Motors, Pratt & Whitney, and Honeywell often have an overhaul interval of 3,000 hours and a service life of 7,000 to 10,000 hours. Our d series is indeed not as good as others. We admit this, and Actively seeking solutions."

He sighed: "At present, our Ascendas Aviation Power has basically met the requirements for the use of small gas turbine power plants in terms of materials, but there is still a big gap in the processing technology, let alone the application of a series of new materials, we have not yet Well mastered, especially in finishing and welding, traditional aero engine technology is not suitable for this new material.

Take the welding process as an example. The developed countries such as the United States and the United Kingdom use electron beam welding for key components of aeroengines, which not only have good flatness but also are not easily deformed under high temperature and pressure. At present, they are used on transport aircraft. Honeywell engines have many parts using this process, but we know that there are welds in some places. After disassembling, we can’t find where the welds are. This is the gap. finishing……"

When it comes to his profession, Qian Qiang once again opened up his chatterbox. Barabala said a lot, all of which are the deficiencies of the current d-series turbo gas power, what causes these deficiencies, and where should they be made up.

All in all, in one sentence, the d-series turbo gas power has a 1800-hour overhaul interval and a 6800-hour service life is really poor. If you look at similar products in the United States, how can you be proud, how can you expand? Is it time to celebrate victory?

Both Li Fang and Song Changzheng were dumbfounded, not the kind of dumbfounded, but truly and completely dumbfounded.

With the overhaul interval of 1800 hours, the service life of 6800 hours is not high? What is high!

You must know that the turboprop on the Yun-8-6 has been overhauled for less than a thousand hours. This is still well maintained. When the pilot does not have any rough driving, it is a little accidental. It is not an overhaul after five or six hundred hours. no way.

In fact, it is not only the turboprop-6, the overhaul interval of other types of engines is generally not high, which is why Song Changzheng would ask whether it is theoretical or actual.

Because the theoretical values ​​of engines produced by domestic power production plants are good, but the actual use of the troops is a different scene, but it cannot be said that the manufacturers are wrong, because the test data is an average value, good or bad average, data It looks good.

This is like the average fuel consumption of a car published by the Ministry of Industry and Information Technology. How reasonable is it to look at it, and how beautiful it is, but when you get started, your tired vomiting blood will not reach the fuel consumption value announced by others.

The naval aviation unit of the Navy encountered the same problem as private car owners decades later. The theoretical value was so different from the actual value that the ground maintenance officers and soldiers of the army felt that if the engine could have an overhaul interval of 1,000 hours. Thank goodness.

But people have taken off aerodynamics, with an overhaul interval of 1,800 hours, and a service life of nearly 7,000 hours. They are not excellent, and the gap is large. If this is heard by other aero engine manufacturers in the country, what would it be like? Will the old face flush in minutes and go straight in and hide for a while?

"Old money, old money~~~"

Looking at the appearance of Li Fang and Song Changzheng gradually becoming petrified, Zhuang Jianye hurriedly stopped Qian Qiang, who was still surging. Qian Qiang was stunned for a moment. I don’t know what Zhuang Jianye meant. Zhuang Jianye also knew that Qian Qiang was not very good at this aspect. He raised his chin at the file cabinet next to him: "Show the 2,000-hour test drive briefing of the d-50 that is being tested some time ago to several leaders."

Qian Qiang listened and narrowed his eyes, and then he suddenly felt that he had said so much. The two navy chiefs in front of him didn't believe him, and didn't say much. He went to the file cabinet on the side and took out a copy of D-50 from it. Test drive briefing, turn around and hand it to Li Fang.

Li Fang took it and looked at Qian Qiang, who was expressionless: "Qiangong, isn't the D-50 on the test bench doing a 100-hour phased test run?"

If this is someone else, I don’t know what Li Fang meant. The 100-hour phased test run generally refers to the first-stage long test run of the newly assembled turbo-powered engine, which mainly checks its basic working conditions. So Li Fang’s words are translated Come here, isn’t the D-50 on the test bench assembled?

Others didn’t understand, but Qian Qiang didn’t understand what Qianqiang was doing. He shook his head, "I have already done two 2,000-hour long test runs. I just finished the overhaul three days ago and did a two-stage test run. , It will start the next long test run, followed by a freezing test run, a rain test run, a bird impact test, and a foreign body inhalation test. After all have passed, it will be the last 10,000-hour full-life long test run."

"Have you done two 2,000-hour long test runs?" Li Fang only felt that the long test run briefing in his hand suddenly became very heavy, and almost fell to the ground without holding it.

Qian Qiang wanted to say otherwise, how do you think the 1860-hour overhaul interval came out? But after all, it is estimated that the other party is the chief of the navy and did not say clearly, but smiled and pointed to the long test drive briefing in his hand, and motioned for himself to read it.

Li Fang quickly opened it, and Song Changzheng on the side also came over to watch~www.readwn.com~ As a result, the two of them looked more and more shocked. The d-50 that was roaring on the test bench had completed more than two thousand two thousand. The hour-long test run was more accurately three times, but the third time did not reach 2,000 hours, only 1880 hours.

The reason for this is mainly based on the two thousand-hour long test runs of the first two times to determine the overhaul interval of the d-50 under normal conditions.

No wonder Qian Qiang said just now that he was so emboldened at 1860 hours. It turned out that he had already done three test runs with such changes.

Now, Li Fang and Song Changzheng will look at the D-50 on the test bench, which is running wildly with a high power of 3,000 kilowatts. It is a bit different. Based on the previous hours, the D-50 under test should be about to reach its end of life. It can be seen from the operating conditions that it is no different from the new engine, and even better in some aspects.

What would it look like if such power was installed on an airplane?

So Li Fang and Song Changzheng looked at each other again, and they quickly understood the same idea from each other's eyes. Then Song Changzheng looked at Zhuang Jianye without hesitation, and solemnly said: "Mr. Zhuang, we will meet when we return. Make a special report to the Navy Headquarters and strive to join the d-50 project. I wonder if you have any comments here?"