With the permission of the tower, Phoenix No. 1 took the lead in taxiing on the runway, and soon looked up and took off, followed by the take-off of No. 2.


    After plane 2 took off, Guo Lin also slowly increased the fuel supply of the plane to the maximum, and the plane naturally began to accelerate rapidly under Guo Lin''s operation. It was not until about 3000 meters that Guo Lin pulled up the plane and flew at the previously calculated angle, that is, the angle of ten degrees upward.


    And when the engine is put on, he always drives at the maximum, and does not reduce the output power of the aircraft due to the take-off of the aircraft.


    In less than a minute, the speed of the plane has more than doubled the speed of sound, and the speed is still improving.


    Of course, this is not just his plane. Looking out from the glass of the plane, he can clearly see that not far from his left, there are two phoenix kt1 aerospace aircraft flying rapidly at the same angle.


    Soon, the speed of the aircraft reached Mach 2.5. At this time, he can clearly see that there are red air currents on the two aircraft not far from him, especially on the head and bottom of the aircraft. With the increase of the aircraft speed, these red air currents finally become a red air mass centered on the aircraft, And the figure of the plane gradually disappeared in his figure.


    Seeing this, Guo Lin was not worried, because he clearly knew that this was the normal situation after the aircraft and the atmosphere rubbed after the speed exceeded Mach 4.


    Even when he looked out in the plane, he could clearly see that the red air flow flowed in front of the scale of the plane.


    "Please note that we are about to reach an altitude of more than 45000 meters. At that time, due to the low oxygen content in the atmosphere, the aircraft engine will not work, so wait a minute. After the aircraft engine stops working, change the engine working mode manually?" Zhao Feng''s voice came from the aircraft''s communication system.


    "Yes, Captain!" in fact, he has mastered the theoretical knowledge for a long time, but he has not carried out the actual operation yet.


    Moreover, he really, this aircraft also has an automatic operation system, that is, as long as he inputs the orbital altitude data he wants to reach, such as perigee and apogee, the aircraft can fly automatically and reach the corresponding altitude.


    However, as a novice, Tiangong technology requires that the automatic driving mode cannot be used without permission, that is, before being proficient in the manual driving mode.


    Therefore, when the altitude of his plane reached nearly 50000 meters, the engine of his plane finally stopped working due to insufficient oxygen.


    So he immediately manually turned on the rocket engine mode of the engine and restarted the engine.


    However, just as his space plane had just broken through the atmosphere and reached an altitude of 100000 meters, that is, 100 kilometers, he suddenly heard a sound of touch and the feeling of aircraft vibration, which made him nervous at once.


    Obviously, the sound and vibration just now all indicate that the plane has just been hit by something, and the impact force is not small.


    So he immediately said in the communicator, "Captain, it seems that the No. 3 aircraft I am driving has just hit something, and the impact is very strong, and even caused vibration to the whole aircraft. I suspect it is likely to be meteorite or satellite debris.


    As an aerospace enterprise, Tiangong technology actually has a very strict monitoring system for Earth''s on orbit satellites, and naturally knows very well about the orbit of on orbit satellites.


    Therefore, it is reasonable that there is no on orbit satellite in the test flight route area. Therefore, they naturally believe that the impact is caused by meteorites.


    After all, although human civilization and science and technology have been very developed, the mastery of meteorite orbit is not very good. Although it is OK for the orbit and prediction of large meteorites or asteroids, it is very difficult to detect meteorites directly less than 10 meters, even in the earth''s low orbit, meteorites less than 1 meter Monitoring capacity is also very limited.


    "Please immediately detect the air pressure in the aircraft body and use the aircraft detection system to check the aircraft!" after listening to Guo Lin''s words, Zhao Feng is naturally very nervous. As an astronaut, he knows very well the consequences of transportation and aircraft after impact.


    Soon, the inspection results of the system came out.


    "Captain, the air pressure inside the aircraft is good, and there is no air pressure drop. At the same time, according to the system inspection, all equipment in the aircraft cab can operate normally without problems. Now the aircraft is undergoing a comprehensive inspection.


    The problem was found. The cargo warehouse of the aircraft was damaged. A groove with a diameter of about 5mm appeared at the top of the aircraft, but it did not completely penetrate the skin of the cargo warehouse, "Guo Lin said.


    After listening to Guo Lin''s words, Zhao Feng breathed a sigh of relief. Although according to Guo Lin''s answer, their aerospace plane did collide with something, the good thing is that the collided thing did not penetrate the warehouse, but caused damage to the skin outside the warehouse.


    And because the impact is in the direction of the cargo warehouse, it also greatly reduces the damage caused by the impact to the aircraft.


    So he immediately ordered Guo Lin: "the plane continues to move forward according to the scheduled plan. After the plane successfully enters the orbit, it will conduct a thorough inspection."


    After all, the plane has just flown out of the atmosphere for a short time, so although the plane has already flown out of the atmosphere, it has not entered the orbit. If it stops entering the orbit, there is no doubt that it is committing suicide. After all, where it stops will not be long before the plane will return to the atmosphere under the gravity of the earth.


    However, judging from the current situation of the aircraft, he simply can''t judge the specific situation of the aircraft and whether there are cracks on the skin of the aircraft warehouse. If there are cracks, the high temperature and high pressure generated by the aircraft re-entry into the atmosphere is enough to destroy everything in the aircraft, including the personnel in the aircraft.


    So what they have to do now is to make the aircraft successfully enter the orbit, so that the aircraft can operate stably on it, and then they can conduct a thorough inspection of the aircraft. If the problem is not too serious, they can repair it. If the problem is serious and the aircraft can no longer return to the atmosphere, Then, naturally, they can transfer all the personnel on the plane to another plane to ensure the safety of personnel.


    In fact, this is also the reason why Tiangong technology has been flying in formation since the test flight of overhead aircraft the next day.