Two months later, a giant with a length of more than 80 meters, a wingspan of less than 60 meters and a height of 15 meters quietly stopped at the starting point of the runway of the great desert Aerospace Center. At the same time, with nearly 100 experts, technology and ground service team, it is conducting all aspects of inspection on the aerospace plane to ensure its condition.


    Yes, this behemoth is the product of their deep transformation of phoenix-2 aircraft in the past two months, phoenix-kt2 medium-sized aerospace aircraft.


    Like the previous Phoenix kt1, this space plane can take off and land from the ground like a normal plane, fly like a normal plane in the atmosphere, and break through the atmosphere and enter space.


    Moreover, due to the technical progress of Tiangong technology in pulse detonation rocket engine and plasma and isotope engine, the design data of this aircraft has been higher than that previously scheduled by Tiangong technology.


    Take the highest orbit that this space plane can reach. When it is full of fuel and electricity, it can reach the height of the earth''s forbidden orbit, that is, 36000 kilometers. If more batteries are installed to enable it to carry more electricity, its flying height will be higher, even if it directly reaches the lunar orbit, It''s not difficult.


    In addition, the carrying capacity of this space plane is also very strong. It can transport about 120 tons of goods to the earth''s low orbit at most, while the carrying capacity of the medium orbit, that is, the orbital plane where the Ziwei space station of Tiangong technology is located, can transport about 70 tons of materials at most. As for the high orbit, that is, geosynchronous orbit, Up to 40 tons of goods can be transported at one time.


    In addition, in addition to the cargo warehouse, this space plane also has a huge cabin, right behind the cockpit, with ten seats, that is, in addition to carrying cargo, plus three astronauts in the cockpit, this space plane can carry 13 astronauts to heaven at one time.


    At this time, Zhao Feng and two other astronauts in exoskeleton spacesuits are confidently walking towards the Phoenix kt2 medium-sized space plane developed by their Institute of space technology, and the first test flight of the overhead space plane will be completed by them.


    Of course, like the previous test flight of aerospace aircraft, the first test flight of this Phoenix kt2 aerospace aircraft will not directly carry out aerospace flight. Like other aircraft, the first test flight will only test the normal takeoff and landing ability of this aircraft.


    Only after the takeoff and landing capability of this aircraft is determined will more difficult flight tests be carried out, such as various actions during flight in the atmosphere, followed by supersonic and ultra-high speed flight, extreme speed flight in the atmosphere, etc.


    Only when all these subjects are completed will the more difficult space flight be carried out.


    However, even if all the test flight subjects in the atmosphere are completed, the aircraft will not directly carry out the test flight in medium and high orbit, but will first carry out the test flight in low orbit, and then the test flight subjects in medium orbit and high orbit.


    In short, like the previous test flight, the test flight of this aerospace aircraft is also gradual.


    As the most outstanding astronaut and test pilot of Tiangong technology, Zhao Feng is certainly the most responsible person for such a test flight.


    Soon, the inspection of the aircraft was completed, so at the command of the tower, he directly turned the pulse engine horsepower to the maximum, and the aerospace aircraft immediately began taxiing. At the same time, under the aerospace aircraft, two attached engines spraying flames downward, or vertical takeoff and landing engines, also began to work.


    With the efforts of scientific and technological researchers of Tiangong, this aerospace aircraft is equipped with two vertical take-off and landing engines. However, because the weight of this aerospace aircraft is too large, it is impossible to take-off and landing vertically on earth. However, when the aircraft takes off and lands, especially when taking off, these two vertical take-off and landing engines, But it can greatly shorten the taxiing distance of the aircraft.


    According to the calculation of the R & D personnel of Tiangong technology, if the two vertical takeoff and landing engines are not turned on, the taxiing distance of the aircraft should reach at least 67 kilometers, but with these two engines, the taxiing distance at takeoff can be shortened by at least half.


    In other words, with two engines, this space plane can take off as long as it taxis for about three kilometers.


    However, after the aircraft took off, the speed of the aircraft reached the subsonic level in only a minute or two. However, there was no supersonic test in the test subjects, so after reaching the subsonic speed, Zhao Feng had to keep the aircraft at this speed, and then began to hover over the East China Sea according to the test subjects. A few minutes later, he was Phoenix.


    Of course, when landing, due to the existence of vertical takeoff and landing engine, Zhao Feng clearly felt that the landing of the aircraft became more stable and easier to control.


    Most importantly, the taxiing distance after landing is also shorter, which makes him more trust in the technology of Tiangong technology.


    After the first test flight, Wang Bin and his crew immediately carried out a series of inspections on the aircraft. In only one night, they completed the inspection of the aircraft. After the inspection was no problem, the next day, they immediately arranged a new test flight subject. Like the previous first test flight, this test flight was carried out by Zhao Feng and his crew.


    In the next few days, Zhao Feng conducted flight test almost every day, while Wang Bin and others inspected the aircraft every night. In less than two weeks, Wang Bin and others completed all subjects of atmospheric flight test.


    The completion of the atmospheric flight test course means that the flight test course of air and space flight will be launched soon.


    In this regard, Wang Bin and others were very cautious. After all the atmospheric flight test subjects were completed, Wang Bin and others immediately conducted a comprehensive inspection of the aircraft, including a series of large and small parts such as the engine body, even a small screw.


    To this end, Wang Bin and them directly spent three days. They only spent two weeks in all the previous atmospheric flight test subjects. It can be imagined how carefully Wang Bin inspected the aircraft this time.


    After determining that there was no problem, the test flight subject of breaking through the atmosphere finally began. After taking off, Zhao Feng directly turned off the vertical take-off engine of the aircraft, closed the engine compartment door of the vertical take-off and landing engine, and then pushed the power of the main engine to the maximum.


    Driven by the engine, the speed of the aircraft rose rapidly, and soon reached the highest speed of Phoenix kt1 aircraft in the atmosphere, and the aircraft was still accelerating. Zhao Feng was not surprised.


    Because the engine of this aircraft and the previous Phoenix kt1 aerospace aircraft are more excellent, the acceleration and maximum speed in the atmosphere are far higher than that of Phoenix kt1 aerospace aircraft.