So he said, "Mr. Wang, to tell you the truth, when designing the civilized aircraft, our first consideration is to use electricity as energy, that is, rechargeable light helicopters,


    "However, after understanding the battery capacity and safety problems in the current market, we gave up this idea. First of all, the kilogram energy density of batteries can not provide power for aircraft to fly for a long time. Only in terms of safety, most of the high energy density batteries on the market can not meet our requirements 。


    After all, we use it on the plane, not on the car on the ground. Once the plane has problems in the process of flying, things will be in trouble.


    If the car on the ground has a problem with the battery, it can stop immediately, and the people on the car can abandon the car and escape immediately.


    However, the helicopter is different. The helicopter flies in the sky. Once there is a problem with the battery, the possibility of survival of the people on the plane is basically equal to zero.


    So, in the end, we didn''t use batteries as the power of the aircraft, but used traditional engines as the power, "Du Haili said.


    "Mr. Du! Now that I have said it, it means that Tiangong technology has the technology to solve this problem, and can meet the requirements of light helicopters in terms of safety and battery capacity. Now I just want to ask if Mr. Du is interested in this aspect.


    Of course, Mr. Du, I know. You can''t give me an answer for a while. Mr. Du, you can discuss with your shareholders or technicians. If you have an answer and are interested, Mr. Du, you can contact me. Then we''ll talk about the specific details. "Wang Bin said.


    "Yes, I''ll go back and discuss with the technicians of our company and listen to their opinions," Du Haili said.


    As for the shareholder discussion mentioned by Wang Bin, it is not necessary for Du Haili, because their Kunlun aircraft, like Wang Bin''s Tiangong technology, is a private enterprise, or a private enterprise, that is, the so-called unlimited company, so their company has no shareholders except themselves.


    Then, after the three talked for a while, chief engineer Lin looked at the time and found that it was almost time for them to prepare for the test flight. Therefore, Wang Bin and them immediately carried out the final inspection before the test flight of the UAV and began to inject fuel into the UAV.


    After all, it is impossible to refuel the UAV during transportation, so the fuel can only be refueled when it comes to the test flight site.


    "Call test pilot No. 3, call test pilot No. 3, this is the tower of the test field. Are they ready? Are they ready?" just when Wang Bin and his team had just finished the final inspection of the UAV and fuel injection, the pleasant voice of the tower staff of the test field came from the walkie talkie they received.


    "Report to the tower, runway 3, Tiangong 001 UAV is ready to take off at any time." after listening to the tower, Jia Jie, as the test pilot, immediately replied.


    At the same time, Wang Bin and others immediately opened all kinds of equipment they carried and began to test the data of the aircraft.


    Sure enough, after Jia Jie answered the tower, the voice of the tower came again from the walkie talkie.


    "Tiangong 001 UAV, this is the tower. There are no aircraft in the test flight airspace. You can take off. Your test flight area is within 1000 meters and more than 50 kilometers away from the sea. I wish you a complete success in the test flight!" the pleasant voice sounded in the walkie talkie again.


    "Thank you!" Jia Jie said again.


    With that, Jia Jie turned his head to Wang Bin. When he saw Wang Bin nodding, he immediately pressed the button to start the plane.


    As he pressed the button, the engine of the aircraft began to rotate under the traction of the internal motor. After reaching a certain speed, it was ignited directly. Then the engine of the UAV began to make the unique sound of the jet engine.


    At the same time, as the sound of the jet engine began to sound, everyone in the test flight field looked at Wang Bin and his side, including the staff of the Kunlun aircraft checking the helicopter.


    After all, because Wang Bin''s UAV is a large jet UAV, when Wang Bin''s UAV began its test flight, the flight test work of other teams was temporarily stopped by the tower.


    "Tiangong 001 calls the tower. Tiangong 001 is ready and requests to take off." just after the UAV engine starts, Jia Jie turns on the walkie talkie again and calls the tower!


    "Tiangong 001 can take off!"


    With the command from the tower, Jia Jie gradually increased the fuel output of the UAV. At the same time, the sound of the UAV Engine began to increase gradually. At the beginning, the UAV began to slide forward slowly and said faster and faster. When the sliding distance of the UAV reached more than 200 meters, the UAV suddenly raised its head and flew towards the high altitude at an angle of almost 60 degrees.


    After all, at this time, the fuel in their Tiangong 001 UAV is not full, not even one fifth. In addition, there is no load on the aircraft, so it is very easy for the plane to take off.


    With the improvement of the height and speed of the UAV, Wang Bin and their naked eyes soon couldn''t see the whole picture of the UAV in the sky, leaving only a small black spot.


    So Wang Bin immediately took out the telescope they had already prepared and began to use the telescope to observe the situation of the UAV. At the same time, they also looked at the laptop screen on the table in front of Jia Jie to check the status of the UAV.


    Of course, since this is the first test flight of their UAV, there are no too complex actions, just some routine operations.


    Fortunately, Wang Bin''s plane is a UAV. If it is a manned plane, they don''t have to think about going to heaven for the first test flight. At most, they will conduct a ground taxiing test.


    After Wang Bin and chief engineer Lin conducted a routine test flight for about five or six minutes, Wang Bin and chief engineer Lin did not find any condition of the UAV. After everything met the requirements of the design data, Wang Bin said: "Jia Jie, start supersonic flight and see how the aircraft performs under supersonic conditions!"


    "It''s Mr. Wang!" after that, Jia Jie increased the output of aircraft fuel again, and the engine thrust of the UAV increased again. Even at this time, the UAV has been tens of thousands of meters away. Wang Bin and they can clearly hear the roar of the engine when the UAV is flying.