With the completion of the 5000 hour test run and the start of the final full-life test run, Wang Bin basically stays at the aviation laboratory every day and carries out the full-life test run with Professor Zhang and others. Of course, this can also be called destructive test run.


    With the test run, the performance of ten engines was exceptionally good at 5500 hours, 6000 hours and 6500 hours, and there was no situation.


    When the test run time reaches 7000 hours, the fuel consumption of one of the ten engines begins to increase. When it reaches 7200 hours, the fuel consumption of the ten engines on the test bench basically begins to become a little higher, but the sound of the engine is still good.


    However, when the test run time reached 7600 hours, the fuel consumption of the engine on the No. 3 test bench became abnormally high. At this time, both professor poke and Wang Bin knew clearly that the service life of the engine had come to an end. At the same time, the situation of escaping from the engine was not so good.


    Sure enough, when the test run time of the engine reached 7700 hours, the fuel consumption of all engines increased sharply. Even when the No. 3 engine was running, there was a slight vibration and a trace of abnormal noise.


    Finally, when the test run lasted 7800 hours, Professor Zhang finally gave the order to stop the test run, because at this time, the fuel consumption of the misbehaving engines on the ten test stands had increased sharply, and the engine vibrated and made abnormal noise.


    So to this extent, the test run is no longer necessary, because both Professor Zhang and Wang Bin know that the internal situation of the engine must be very bad at this time. If the test run is ongoing, unnecessary accidents are likely to occur.


    When all the engines on the test bench stopped, the whole test shop suddenly became quiet, and everyone in the test shop suddenly became silent, because no matter Professor Zhang, Wang Bin, or others in the test shop, even those who don''t know the operation time limit of the aeroengine, The significance behind 7800 hours of full life test run, especially for Huaxia.


    You know, if such data were put a few years ago, even the best engine in China could not reach this data in all its life, that is, from the beginning of a new engine to three major overhauls and then to scrapping. Therefore, this test run data is definitely very powerful.


    About ten minutes later, the young people in the test shop suddenly remembered the fierce cheers. At the same time, their hearts, including Wang Bin and Professor Cha, felt extremely proud because their engine had a long service life and created a miracle.


    Of course, like these young people, Wang Bin was very excited, and praised Professor Zhang and everyone present on the spot. At the same time, he suddenly sent a large number of red envelopes in the aviation laboratory group to celebrate. Finally, he announced that the salary of everyone in the aviation laboratory would double from this month.


    You know, this is an aviation experiment! As technicians in aerospace, their wages are several times higher than those of others in Tiangong technology, and now they have doubled on the original basis. How can this make them unhappy!


    So when Wang Bin announced the news, all of a sudden, the people in the laboratory were more excited.


    It was not until everyone''s mood calmed down that Wang Bin and the technicians in the laboratory dismantled all the ten engines on the test bench and sent them to the assembly workshop to prepare for the disassembly of the ten engines one by one.


    Of course, since the newly completed commissioning project is a destructive life-cycle commissioning, all the disassembly is just to know the internal conditions of these engines, so there is no need for cleaning and reassembly.


    However, the necessary inspection is still necessary. After all, the internal parts of the engine are so precise that even if it has reached this level, many things can not be seen by the naked eye.


    However, at this time, Wang Bin, Professor Zhang and others judged that among the ten engines, the most seriously damaged should be on the engine. After all, compared with other parts, the bearing on these engines should bear the greatest pressure.


    Even if this bearing is already made of the best bearing steel of Tiangong technology, its level is only relative to the current level of human civilization. Therefore, if you want to make the service life of the bearing longer, you must use the bearing made of more advanced bearing steel.


    All the ten engines were transported to the workshop, and the technicians immediately began to disassemble these engines according to the engine process, which was soon completed.


    As the ten engines were disassembled, Wang Bin, Professor Cha and others came forward and looked at them carefully. After all, although at this time, because these engines had passed the final life-cycle test, the parts of these engines had long been black, and even many parts were stained with oil.


    However, the judgment of Wang Bin, Professor Zhang and others was no accident. After a series of tests, the other parts of these ten engines were in good condition. Even if they were used for another 10000 or 20000 hours, there would never be any problems.


    However, when they saw this engine bearing, he found that these bearings may look good at this time, but if you look carefully, you will find that the steel balls of these bearings are no longer the same as those in the new time. They are all metallic luster without any defects.


    If you look at the bearing carefully with a magnifying glass, you will find that there are dense small black spots on the steel ball of the bearing, and a large number of wear marks and even metal peeling on the bearing sleeve.


    Subsequently, Professor Wang Bin and Professor Zhang inspected all the bearings on the ten engines one by one.


    He found that this situation occurred more or less in almost every bearing of these ten engines, especially in the main bearings.


    Seeing this, Wang Bin stopped. At the same time, he secretly thought that he must make greater efforts on the bearing steel and the bearing itself to improve the quality of the bearing again.


    Of course, if it is other enterprises, it is impossible to improve the quality of bearings in a short time. Moreover, the bearings of Wang Bin and Tiangong technology are already the world''s top bearings, so it is more difficult to improve them.


    However, it is only for other enterprises. For Wang Bin, this is not an insurmountable problem. As long as he has enough energy coins, it is not a problem to improve the quality of bearing steel and bearings,