At the same time, Wang Bin can also clearly see in his telescope that the speed of the UAV at this time has obviously increased a lot, and soon formed a special cloud in the middle of the aircraft when the aircraft broke through the sound barrier.


    However, as the speed of the aircraft continued to increase, these special clouds began to disappear.


    Just then! Jia Jie said, "the UAV has broken through the sound barrier, with a speed of Mach 1.1."


    "Continue to speed up until you reach the maximum speed!" Wang Bin said busily.


    "Yes!" then, Jia Jie adjusted the public output column of the UAV to the maximum.


    As the engine horsepower of the UAV reaches the maximum, soon, the speed of the UAV also reaches the design maximum speed.


    However, the UAV is still accelerating at this time. Although it has reached the design maximum speed, it does not mean that the maximum speed of the aircraft can only reach this speed. After all, the design maximum speed is under the condition of full oil and full load, that is, the ultimate takeoff weight of the aircraft, 16.3 tons.


    Now the UAV is neither full of oil nor loaded with anything, and even all kinds of air to ground search radars are not installed. Now the whole aircraft adds up to only 67 tons, so naturally its speed will be higher.


    Soon, the speed of the aircraft broke through Mach 1.6 and reached Mach 1.7, but the speed of the aircraft is still increasing rapidly.


    "Mr. Wang! The speed of the UAV has reached Mach 1.7 and is still accelerating! Do you want to stop accelerating?" when the plane reached Mach 1.7, Jia Jie asked Wang Bin with some worry.


    After all, the maximum speed of this aircraft at the time of design is only Mach 1.6! Now the speed of the plane has exceeded Mach 1.7, so he is worried that the collective structure of the plane can''t stand it.


    However, Wang Bin''s answer forced him to continue to accelerate the plane.


    "No, keep accelerating. Since it''s a test flight, we have to measure the ultimate speed of the UAV." although Wang Bin knows Jia Jie''s concerns, he still orders Jia Jie to continue accelerating.


    Although Wang Bin himself was worried that the collective structure of the aircraft would not stand at such a speed, it was obvious that Wang Bin''s worry was superfluous. Shortly after he gave the order, the speed of the UAV broke through the limit again and reached Mach 1.9.


    At this time, the speed of the UAV still did not reach the limit output by the aircraft engine and continued to accelerate until the speed of the UAV passing through No. 001 reached Mach 2.06. Finally, the speed of the UAV stopped at the level of Mach 2.12.


    "Mr. Wang! The speed of Tiangong 001 is Mach 2.12, the aircraft speed is good, the internal vibration is good, and the internal structure is good! Everything is normal." when the speed of the aircraft reached the limit, Jia Jie immediately reported the situation of the aircraft.


    "Start the test of turning and other actions at the limit speed, and record the data changes inside the aircraft!" after listening to Jia Jie''s report, Wang Bin nodded.


    However, after listening to Wang Bin''s words, Jia Jie did not immediately execute Wang Bin''s orders, but asked Wang Bin: "Mr. Wang, do you really want to operate like this? After all, this is a turn at the extreme speed of Mach 2.1. When turning at this speed, the aircraft has to bear extraordinary load and the internal structure has to bear strong pressure. Once the turning process exceeds the limit that the internal structure can bear, the aircraft is likely to disintegrate on the spot Yes. "


    "Yes! Mr. Wang, it seems that this UAV of Tiangong technology is only the first flight test this time! I don''t think it''s necessary. After all, there are opportunities for such action test in the future!" chief engineer Lin also said.


    To tell the truth, for chief engineer Lin, Wang Bin''s first flight test of Tiangong technology was too rough. How could an aircraft make such rough actions when it was the first flight test? Let alone the turning beyond the limit speed he just issued, even if it was the limit speed test they had conducted before, if it was in accordance with the normal flight test conditions, it would be necessary It will not be carried out until the aircraft has carried out many test flights, not to mention turning at the limit speed. After all, the loss of the aircraft is very huge. Even if you are not careful, it may lead to the disintegration of the aircraft and the complete failure of the test flight.


    However, Wang Bin doesn''t care about their worries. After all, for Tiangong technology, although the cost of this UAV is nearly ten million, because the cost of the engine alone is as high as five or six million. If scientific research funds are added, the price will be higher, but it''s nothing for Tiangong technology. For Wang Bin, Now the most important thing is to collect all the data of the aircraft.


    So he ordered Jia Jie: "according to what I did, even in the process of test flight, the plane really broke down or disintegrated. It''s a big deal to build another one. We can afford to lose. What''s more, I have confidence in our Tiangong 001 UAV."


    After listening to Wang Bin''s words, Jia Jie didn''t say anything. After all, who called Wang Bin the boss of Tiangong technology! What''s more, it''s also true that Wang Bin said. For his current Tiangong technology, even if there is a problem with this aircraft, it''s a big deal to build another one. The most important thing is that they have obtained the data they want to obtain.


    After listening to Wang Bin''s words, chief engineer Lin shook his head and said nothing more. After all, this is just a UAV, and no one is flying the plane. If someone is flying the plane, chief engineer Lin will not let it carry out such a rough test flight, and the UAV is different. The big deal is to lose a UAV. As long as the data is obtained, They can build another UAV at any time with Tiangong technology.


    Then, Jia Jie operated the UAV and carried out a series of turning actions. These actions include large radius turning, small radius turning and turning in all directions. Until nearly half an hour of test flight, Jia Jie reported to Wang Binhui: "Mr. Wang, the aircraft is about to run out of fuel. Would you like to return?"


    "Yes, but when we return, we have to carry out the final subject test, that is, the test of this UAV under five fuel conditions.


    Jia Jie now turns off the aircraft''s fuel output system and turns on the electric drive to return.


    "Yes! Mr. Wang!" then he turned off the personnel output of the aircraft and turned on the electric drive system of the aircraft.


    With Jia Jie''s operation, the roar of the originally roaring aircraft suddenly disappeared, which made everyone present except Wang Bin, Jia Jie and chief engineer Lin very confused. They thought whether the UAV test flight failed this time.


    Of course, it''s not that after the UAV is changed to electric drive, the UAV Engine has no sound. In fact, after the UAV is changed to electric drive, the UAV Engine continues to make a huge roar, but the sound is much lower than that when it is driven by fuel. However, even so, in fact, it can be heard on Wang Bin''s side The roar of.