"Mr. Wang! The cause of the damage to the engine fan blade has been found, and we have preliminarily determined why stones appear in the engine," Professor poke said.


    "What''s the reason?" Wang Bin also wondered at this time. After all, stones will not appear in the engine for no reason. The most important thing is that when impacted by birds, the plane still has a very high height from the ground.


    At the same time, according to the data of previous test run, when the diameter of small stones is less than 3mm and the hardness is less than a certain degree, it is impossible to cause damage to tg-s002 engine. Therefore, it can be judged from here that the diameter of stones sucked into the engine this time is definitely more than 3mm, and the hardness is also very high.


    But the question is, how do these stones run up at such a high altitude?


    After listening to Wang Bin''s words, Professor poke said, "Mr. Wang, the reason for the damage of these engines is just as we expected before. It is caused by stones with a diameter of more than 3mm and great hardness.


    As for how these stones are in the runway engine, they are not rolled in from the ground during the take-off and landing of the aircraft. After all, with the improved tg-s002 engine of No. 9 aircraft and the height of the ground, it is impossible for the ground to be rolled in.


    So there may be only one thing in the end, that is, the stones entering the engine are rolled in together with these birds. I think you must know something about the habits of poultry, Mr. Wang.


    Some poultry often eat stones. At the same time, in birds and even birds, not only poultry will do so. In fact, many birds in birds will do so, so this can explain why stones enter the engine and cause damage to the engine. "


    After listening to Professor Zhang''s analysis, Wang Bin, Qiu Tuan and others finally knew why the engine was damaged, and what they had to do next was naturally to replace these blades of the engine.


    Immediately, two technicians of Tiangong technology began to replace these damaged blades. At the same time, Professor poke began to think about how to avoid such incidents from happening again.


    At this time, Qiu Tuan and others naturally don''t know what Professor poke thinks. If they know, they will be surprised. After all, the performance of this engine is so excellent. Now professor poke is not satisfied and wants to make its performance more advanced, which is absolutely shocking.


    At this time, the flight attendants and maintenance personnel at the nearby base also heard the dialogue between Professor Zhang and Wang Bin. Naturally, they knew exactly what the accident was about, which made them more thoroughly understand the performance of these engines of Tiangong technology.


    At the same time, many people were also secretly surprised that the engine through science and technology could reach such a degree that the blade could ensure the intact state after the fan blade hit the pebble. There were no problems in other places except where the blade was damaged directly.


    If it is another engine, in such a case, the fan blade will definitely be blown away at the first time, resulting in the scrapping of the whole engine or even explosion on the spot.


    Of course, these people''s surprise at this engine is no longer the first time. In fact, when they inspected the plane just after it landed, they sent out my surprise last time. After all, they saw the fan blades made of glass for the first time!


    Professor Chua and others, the replacement of these damaged blades is not just to replace the damaged blades, but to replace all the fan blades on the two engines with new ones. After all, after so many birds are involved, and these birds also carry so many stones. If not all of them are replaced, whether Wang bin himself or professor Chua, I won''t rest assured about this engine.


    Although Wang Bin is very confident in the blades made of glass produced by their company, they do not think that such an impact will break or fall off the internal glass blades.


    However, the material of glass is obviously different from steel and titanium alloy. After being impacted by hard objects, it will not deform like metal, but will directly crack or fall off. Therefore, if all blades are not replaced, in case of potential safety hazards, the consequences will be serious.


    Although it seems very troublesome to replace all the fan blades. If it was other engines, it would be impossible to complete it every few days or even ten and a half days and months, but Wang Bin didn''t need so long to replace the blades of their engine. It only took an afternoon.


    Professor Zhang completed the replacement of the fan blades of the engine of the improved No. 9 transport plane, and the next day, the improved No. 9 transport plane returned to the blue sky and began a series of test flights on the plateau.


    ....................


    After changing the blades of the engine, Wang Bin, Professor Cha and others immediately put them back to Tiangong technology. After all, under the current situation of Tiangong technology, they are not allowed to stay outside for a long time.


    At the same time, just a few days after Wang Bin''s return, Wang Bin finally completed the assembly of their second Tiangong technology rocket, that is, tiangong-2 five ton launch vehicle.


    The total weight of the rocket after refueling was as high as 500 tons, and the vertical height reached nearly 35 meters.


    However, it can also be seen from here that there is still a lot of room for improvement in the rocket technology of Tiangong technology at this time. After all, under the same total weight of the rocket, if the total weight of the official rocket reaches the level of this rocket, its low earth orbit carrying capacity can reach at least 8-10 tons, but the low earth orbit carrying capacity of this rocket, But only more than five tons, less than six tons.


    Of course, after the final assembly is completed, Wang Bin and they are naturally ready to start their first launch.


    Moreover, since this rocket is the first rocket of Tiangong technology, Wang Bin handed in their application for launching this rocket as soon as it was produced.


    At the same time, after the application was submitted, Wang Bin also called Qin Lao, the person in charge of the Aerospace Department, for his opinions.


    However, when old Qin learned the news, he was also very happy. Although he had seen the manufacture of this rocket by Tiangong technology in the rocket factory of Tiangong technology before, and he also saw that this rocket is a design drawing, but Tiangong technology can complete it within the time they planned, Still have a certain skepticism.


    Now Tiangong technology has finally completed the manufacture of this rocket. Naturally, he is very happy, but in addition to being happy.


    He also suggested to Wang Bin that for the sake of safety, he hoped that the five ton rocket of Tiangong technology could also be launched from the offshore launch platform in the South China Sea.


    After all, compared with the launch from the land launch pad, the safety factor of maritime launch is undoubtedly much higher for personnel. Even if the launch fails, it will not cause major casualties except the damage caused by the rocket itself, spacecraft and launch platform.