Wang Bin naturally knew clearly that there was no high-altitude and high-speed project in today''s flight test subjects, that is, there was no test flight project with an altitude of more than 10000 meters and a speed of more than Mach 1. Therefore, Wang Bin nodded and said to Qiu Shi: "Qiu Shi, tell the crew to reduce the speed and height!"


    While Wang Bin was talking to Qiu Shi, the speed of the aircraft had reached Mach 0.98 and the altitude had reached 10000 meters. That is to say, the speed of the aircraft had reached the limit of subsonic speed. With a little effort, the aircraft could break through the silver seal and reach a speed of Mach 1.


    However, at this time, the crew of the aircraft obviously knew that there were no supersonic flight tests or high-altitude flight tests in today''s flight test subjects. Therefore, after reaching this speed, the phoenix-1 aircraft did not continue to accelerate, but maintained the speed and altitude of the aircraft at this stage until division Qiu ordered to reduce the altitude and speed, The crew of the plane only reduced the altitude and speed of the plane.


    However, even so, the altitude of the plane was maintained at about nine kilometers, and the flight speed was maintained at about Mach 0.9.


    Although the airframe is the first flight test of the aircraft, all kinds of data during the flight test are very good. Even when the aircraft has just reached 10000 meters and the speed has reached Mach 0.95, the data are abnormally stable during the flight, which makes Qiu Shi and others smile. It is obvious that, They are very satisfied with the flight performance of the aircraft below the speed of sound.


    Then, we noticed that at this time, the speed of the aircraft began to decline, but the altitude did not change. When the speed of the aircraft decreased to Mach 0.7, the phoenix-1 aircraft began to carry out various action test subjects, such as large radius turning, small half turning, rapid rise, rapid decline, minimum high-altitude flight speed, etc.


    With the progress of flight subjects one by one, until all flight items are completed, the Phoenix 1 aircraft finally begins to return. However, both Wang Bin and Qiu Shi have noticed that there is still a lot of fuel in the aircraft at this time. According to the fuel data of the aircraft, nearly three-quarters of the fuel on the aircraft has not been consumed.


    If the aircraft is operated according to the normal flight conditions, the aircraft should basically drain the fuel before landing.


    However, on the way back, the phoenix-1 plane flew over the Tiangong science and technology base without any oil discharge, which made Qiu Shi and others nervous again.


    So he asked Wang Bin, "Mr. Wang, there are still more than three-quarters of the fuel in this plane. Is there no subject in which the fuel is emptying and falling in your flight test subjects?"


    After listening to Qiu Shi''s words, Wang Bin nodded and said: "Indeed! There is no subject of emptying fuel in this test flight. According to our design data, our aircraft can land safely even when it is full of fuel. Even when it is full of fuel, there is no problem in taking off and landing, but the taxiing distance is long when landing Just some. "


    "What? There''s really no fuel discharge subject! Is it too dangerous to land like this? After all, it''s a completely different concept for an empty aircraft to land with a small part of fuel and a large part of fuel! This has a great impact on the safe landing of the aircraft! There must be a little failure of the aircraft, and its internal fuel may definitely make The plane is doomed!


    No, Wang Bin, you should ask Zhao Feng to drain the fuel inside the body before landing. "Qiu Shi said anxiously.


    At the same time, the military personnel in the command center were also very anxious. They all hoped that Wang Bin would order the crew to release the fuel on the plane.


    "Master Qiu! And everyone, I think it''s too late even if I give orders at this time. The plane has begun to descend!" said Wang Bin.


    No, when Wang Bin and others were talking, the altitude and speed of the aircraft were very low, and the aircraft was facing the base runway and was descending rapidly. When Wang Bin and others looked at the aircraft, the aircraft was less than 30 meters from the ground of the runway.


    Seeing this, no matter Wang Bin or Qiu Shi and others stopped talking, but stared at the landing plane closely, because they knew that they must not disturb the pilot at this time, and to this extent, even if they ordered the crew to put the fuel in, the crew had no time to empty the fuel.


    Fortunately, the plane landed very smoothly and smoothly. There was no personnel abnormality. Finally, it landed safely on the runway.


    At this time, Qiu Shi and others were obviously relieved, but then he said to Wang Bin with a serious expression: "President Wang! Since the plane has landed safely today, I won''t say more, but in the future test flight process, if it''s not really necessary, don''t take such a dangerous subject."


    At this time, Qiu Shi could not see that the oil landing was one of the flight test subjects arranged by Tiangong technology, but Wang Bin was afraid of their opposition, so he did not pay attention to this item in the flight test subjects, so he said.


    Wang Bin nodded and said: "Don''t worry, Mr. Qiu. We have collected the data of aircraft landing with oil. If there are no accidents in the future, such subjects will not be carried out. For example, there will be no such project for tomorrow''s flight test project. It has also been clearly stated in the flight test operation instructions that the aircraft fuel must be kept at the lowest level after the test flight Low alert level before landing. "


    With the end of the test flight, the ground crew brought by Tiangong technology and division Qiu immediately pulled the aircraft into the special hangar of the aircraft and began to conduct intense inspection on the situation of the aircraft.


    You know, because the test flight takes a long time, it takes more than half an hour, and there are many subjects and high intensity. In addition, the aircraft will carry out more subjects and higher intensity flights tomorrow, so they must complete all inspections of the aircraft before tomorrow to ensure that the aircraft can carry out the test flight smoothly tomorrow And also ensure that the inspection work is in place without any negligence. Otherwise, if there is a problem tomorrow, it is absolutely unacceptable to them.