However, when the speed of the seventh master reached Mach 2.6, the speed of acceleration began to slow down, and the rising speed of height began to decrease.


    "Mr. Wang, look, the speed has reached Mach 2.6, and the height has reached 27000 kilometers. However, at this time, the increase of the speed and height of the seventh master has begun to slow down. I don''t know whether the seventh master can break through the height of 30000 meters and the speed of Mach 3 this time." at this time, Professor Poke''s look is very excited.


    You should know that the speed of this seventh master has exceeded that of all fighters in China. Even the most advanced fighter in China can never reach this level in terms of speed. Moreover, at this time, the speed of this fighter is still increasing, and it is very likely to become the first fighter in China to break through the double three standard.


    Although it is said that even if it breaks through the double three standard, it is not of great significance for fighters in this era.


    After all, the focus of current fighter development is really stealth and mobility. However, it is not meaningless. When the speed of the aircraft reaches the double three standard, most of the dangers can be avoided.


    We should know that the speed and altitude of most missiles in the world have not reached this level, and only a few missiles specially used to deal with high-altitude and high-speed targets can reach this level.


    Most importantly, the seventh master of the family is a real fighter plane, not a reconnaissance plane like the 71 plane of the bald eagle.


    Of course, this is even more significant for China. After all, if this test flight can successfully break the double three standard, it indicates that even the fighter produced by Huaxia can reach the double three standard.


    That means that China will be able to develop faster aircraft in the future. This test flight is the seventh master. Next time, it will definitely be more advanced fighters. Even the most advanced fighters in China are not impossible to reach this speed.


    Of course, this is naturally to be able to break through. Besides, at this time, although the speed of the seventh master is still increasing, the height is also increasing.


    But its increasing speed has slowed down. No one knows whether it can break the double three standard.


    Of course, they were also very worried about the fuselage of the aircraft at this time, and even asked Zhao Feng''s opinion on whether to continue to increase speed and altitude.


    But he refused, he is still ready to challenge the double three standard, because this is his glory!


    As the height increased a little, Professor Zhang, Wang Bin and general Qiu became nervous. Everyone stared at the radar on the tower.


    28000 meters.


    Mach 2.75.


    28500 meters.


    Mach 2.8.


    Mach 2.81.


    Twenty nine thousand kilometers.


    Mach 2.9


    29500 meters.


    Mach 2.96.


    With the speed getting faster and faster, Professor 500 and Professor Zhang became more and more nervous and excited.


    Just then, someone suddenly shouted that the speed broke through Mach 3, and the current speed is Mach 3.02.


    However, after he finished, he didn''t report again for a long time. It is obvious that the height of the seventh master still didn''t exceed 30000 meters at this time.


    From the radar screen, the height of the seventh master has reached 29800 meters.


    Since it is close to the limit of flight altitude at this time, the increase is very slow.


    Under such circumstances, every second is a kind of suffering for Wang Bin and others.


    Finally, with the passage of time, the altitude of the aircraft has been very close to 30000 meters, reaching 29900 meters.


    In other words, as long as the height of the plane can rise another 100 meters, the seventh master is a veritable double three standard fighter.


    But when the plane reached this altitude, it didn''t rise again for a long time, which made Wang Bin and others very anxious. After all, it was only 100 meters away.


    While Wang Bin and others were suffering, the radar finally showed that the altitude of the aircraft had reached 30000 meters.


    "Zhao Feng! Report your current situation immediately!" after seeing the data displayed on the radar, the tower immediately called Zhao Feng.


    "Report tower, now my altitude is 3011 meters and the speed is Mach 3.03, but the engine of the aircraft has reached the limit, the speed and altitude have not increased, and even are falling slowly." Zhao Feng is also very excited at this time. After all, he can be regarded as driving the seventh master to successfully break through the double three standard. It can be predicted that, This test flight will definitely be recorded in the annals of China. Although this test flight is very dangerous, at such a speed, as long as the control lever he operates is a little harder, the aircraft will definitely disintegrate immediately, and his results are needless to say.


    However, as an excellent pilot, he is obviously very confident in himself.


    "Zhao Feng, report the remaining fuel of your plane." when Zhao Feng was a little excited, the voice of the tower came again from his headset.


    Therefore, Zhao Feng immediately noticed the remaining fuel of the aircraft. However, this attention surprised him in a cold sweat, because at this time, the fuel of the aircraft is running out. If the aircraft flies at this speed for a few more minutes, the fuel of the aircraft will definitely be consumed.


    After all, flying at such an altitude and speed is very fuel consuming. In particular, Qiye, as a light aircraft, does not have a lot of fuel in itself.


    "Call the tower, call the tower! The remaining fuel of the aircraft is running low. Request to return, request to return." Zhao Feng immediately reported to the tower,


    "Allow to return!" after hearing the permission from the tower, Zhao Feng immediately began to reduce the speed and altitude of the plane, and then turned around and drove in the direction of the base.


    However, what he didn''t know was that when he was just flying, his speed and altitude had exceeded the limit of the seventh master, that is, the limit of the aircraft design data. Although the aircraft body and fuselage had been strengthened, the strength in some places was not enough.


    Take the plane''s wing for example. At this time, fuel is flowing out of a small crack.


    So when Zhao Feng''s seventh master was about 50 kilometers away from the base, the fuel alarm of his plane sounded.


    "What''s the matter? How could there be no fuel? I remember that the remaining fuel was enough for me to go back!" Zhao Feng thought secretly. At the same time, he immediately began to inspect the aircraft and finally determined that there might be a problem with the aircraft, resulting in the leakage of fuel.


    So he immediately reported the situation to the tower, and adjusted the attitude of the aircraft as much as possible to make it in the most fuel-efficient attitude.


    Just after he reported the situation, the tower immediately sent an order to drive the plane back to the base as much as possible. If there is no way, it is impossible to fly back to the base and allow him to give up the plane.


    As the best pilot in China, how could Zhao Feng easily give up his plane, not to mention that the seventh master is a test plane! Many data during the flight are very important, including some data of fuselage structure. Once he gives up the aircraft, it is obvious that these data will not be available. He must fly the seventh master back.