Add Bookmark | Recommend this book | Back to the book page | My bookshelf | Mobile Reading

Free Web Novel,Novel online - All in oicq.net -> Romance -> take off my aviation age

Chapter 471 Joining the D-50 Project

Previous page        Return to Catalog        Next page

    Not only Li Fang, Song Changzheng also looked at Qian Qiang with wide eyes, but after all, he was older and more experienced than Li Fang. He was not as surprised as Li Fang showed, but asked: "Is it the theoretical value, or is it the theoretical value?"  Actual value?¡±

    "What are theoretical values ??and actual values?" Qian Qiang looked at Song Changzheng in confusion: "The gas turbine power of our Tengfei Aviation Power is based on actual use conditions and is made through real tests again and again. Compared with  American aerospace power manufacturers such as General Motors, Pratt & Whitney, and Honeywell often require an overhaul interval of 3,000 hours and a service life of 7,000 to 10,000 hours. Our D-series does not perform as well as others. We admit this, and  We are actively seeking solutions.¡±

    He sighed: "At present, the materials of our Tengfei Aviation Power have basically met the requirements for the use of small gas turbine power units, but there is still a big gap in the processing technology, not to mention the application of a series of new materials. We have not yet  Very good control, especially in finishing and welding, traditional aero-engine processes are not suitable for this type of new materials.

    Take the welding process as an example. Developed countries such as the United States and the United Kingdom use the electron beam welding process for key components of aero engines. It not only has good flatness but is not easily deformed under high temperature and pressure. Currently, the welding process used on the Y-6 transport aircraft  Many parts of Honeywell engines use this process, but we know that there are welds in some places, but after taking them apart, we can¡¯t find where the welds are. This is the gap, and  finishing¡­¡­"

    When it comes to his major, Qian Qiang once again opened his chatterbox. Balabala talked a lot, all about the shortcomings of the current D-series turbine gas power, what are the causes of these shortcomings, and how to make up for them.

    In short, in one sentence, the 1800-hour overhaul interval and 6800-hour service life of the D series turbine gas power are really poor. If you don¡¯t believe it, look at similar products in the United States. How can you be proud of it? How can it be inflated?  Is it time to celebrate victory?

    Li Fang and Song Changzheng were both stunned. They were not stunned, but truly and completely confused.

    With an overhaul interval of 1,800 hours, the service life of 6,800 hours is not too high?  So what is high!

    You must know that the overhaul interval of the turboprop-6 on the Yun-8 is less than a thousand hours. This is still a regular maintenance. If the pilot is not driving wildly, and there is a slight accident, it will not take five to six hundred hours to replace it for overhaul.  no way.

    In fact, not only the turboprop-6, the engine overhaul intervals of other types of aircraft are generally not high, which is why Song Changzheng asked whether it was a theoretical situation or a practical situation.

    Because the theoretical values ??of the engines produced by domestic power plants are good, but the actual use by the army is a different story. However, it cannot be said that the manufacturers are wrong, because the test data is an average, and the data is average.  It looks good.

    This is just like the average fuel consumption of cars announced by the Ministry of Industry and Information Technology. No matter how you look at it, it may look reasonable and it may look beautiful. However, once you start driving it, even if you are tired and vomiting blood, it still cannot reach the fuel consumption value published by others.

    The Naval Air Force 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 it would be unreasonable if the engine could have a thousand-hour overhaul interval.  Thank God.

    But Tengfei Aviation Power, with an overhaul interval of 1,800 hours and a service life of nearly 7,000 hours, is actually not excellent and has a big gap. What would it be like if other aero-engine manufacturers in the country heard this?  Will his face turn red every minute and he will crawl into a crack in the ground to hide for a while?

    ¡°Old money, old money~~~¡±

    Seeing Li Fang and Song Changzheng gradually petrified, Zhuang Jianye quickly stopped Qian Qiang who was still talking. Qian Qiang was stunned for a moment and didn't know what Zhuang Jianye meant. Zhuang Jianye also knew that Qian Qiang was not very good at this.  Then he raised his chin at the filing cabinet next to him and said, "Show the leaders the briefing on the 2,000-hour test run of the D-50 that is being tested some time ago."

    Qian Qiang narrowed his eyes after hearing this, and then suddenly realized that the two navy chiefs in front of him didn't believe it after he said so much, so he didn't say much. He went to the filing cabinet nearby and took out a D-50 from it.  Test drive briefing, turned around and handed it to Li Fang.

    Li Fang took it in his hand and looked at the expressionless Qian Qiang: "Gong Qian, isn't the D-50 on the test bench undergoing a 100-hour phased test?"

    If it were someone else, I probably don¡¯t quite understand what Li Fang meant. The 100-hour phased test generally refers to the first phase of the newly assembled ignition turbine power test. It mainly checks its basic working conditions, so Li Fang¡¯s words were translated into Chinese  Come here, isn't the D-50 on the test bed assembled?

    Others don¡¯t understand, but the money in this business is strongHe didn't understand anything and shook his head: "I have already done two long test runs of 2,000 hours. I just completed the overhaul three days ago and did two stages of phased test runs. Then I started the next long test run. There will be more later."  There are freezing test runs, rain test runs, bird impact tests, and foreign object inhalation tests. After all are passed, there is the final 10,000-hour full-life long test run.¡±

    "Have you done two two thousand hours of long test driving?" Li Fang felt that the long test driving briefing in his hand suddenly became very heavy, and he almost lost his grip and fell to the ground.

    Qian Qiang would like to tell you how do you think the 1860-hour overhaul interval is derived?  But after all, he estimated that the other party was the head of the navy, but he didn't say it clearly. Instead, he smiled and pointed at the long test drive briefing in his hand, motioning for him to read it.

    Li Fang quickly opened it, and Song Changzheng on the side also came over to look at it. The more they looked, the more shocked they became. The D-50 roaring on the test bench had not only completed two two thousand hours of long tests, but also  To be precise, it was three times, but the third time did not reach 2,000 hours, only 1,880 hours.

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

    No wonder Qian Qiang was so confident when he said just now that it was 1860 hours. It turned out that he had already conducted such a test run three times.

    Now Li Fang and Song Changzheng looked at the D-50 on the test bench, which was running crazily with a high power of 3,000 kilowatts. It was a little different. Based on the previous hours, the D-50 being tested should be about to reach the end of its service life.  , but from the perspective of operation, there is no difference from the new engine, and it is even better in some aspects.

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

    So Li Fang and Song Changzheng looked at each other again, and quickly understood the same thoughts from each other's eyes. Then Song Changzheng looked at Zhuang Jianye without hesitation, and said solemnly: "Mr. Zhuang, we will meet after we go back."  Make a special report to the Navy Headquarters and strive to join the D-50 project. I wonder what your opinions are?"

    If you like Soar My Aviation Age, please collect it: Soar My Aviation Age is updated the fastest.  (Remember the website address: www.hlnovel.com
Didn't finish reading? Add this book to your favoritesI'm a member and bookmarked this chapterCopy the address of this book and recommend it to your friends for pointsChapter error? Click here to report