Of course, this is only the take-off distance of the ark space plane. As the space plane leaves the ground smoothly, the rapid climbing speed is faster and faster. However, when the speed of the single space plane is about Mach 2, the engine efficiency begins to decline extremely rapidly, and with the height of the space plane getting higher and higher, the climbing efficiency, And it''s getting slower and slower.


    But fortunately, at this time, the pulse detonation engine of the aerospace aircraft began to start, and the speed of the aircraft continued to improve, not because the efficiency of the turbofan engine decreased.


    However, the pulse detonation engine they use is only the export version of Tiegong technology, so when the speed of the overhead aircraft reaches smach, it will not increase, but there is a downward trend.


    However, fortunately, when this space plane reached an altitude of 50000 meters, due to the sharp decline of atmospheric resistance, the speed of this space plane rose sharply again, and until this space plane entered the earth''s low earth orbit.


    But by this time, there was not much fuel left on the space plane, which was only enough to return to the ground.


    When the space shuttle entered the earth''s low earth orbit, both Wang Bin and officials and personnel of other space agencies in the world focused their attention on the display panel of the control center.


    He noted that the actual performance of this aerospace aircraft is different from the data publicized by M iron universe exploration company. Among the data publicized by them, this aerospace aircraft is the largest, with a low earth orbit carrying capacity of nearly 100 tons. According to the current flight data, the low earth orbit carrying capacity of this aircraft is soft and can not reach this data.


    The actual carrying capacity data should only reach 23 of their propaganda data, that is, the actual carrying capacity is only about 50 or 60 tons, which is only equivalent to a series of levels of Phoenix.


    Therefore, according to the level of Wang Bin''s Tiangong scientific and technological personnel, such an aerospace aircraft is undoubtedly a failed product.


    However, this is only relative to Wang Bin''s Tiangong technology. For M iron universe exploration company, the design of such an aerospace aircraft is undoubtedly very successful. If their company can get the engine of Tiangong technology for its own use, even Tiangong 1 and Tiangong technology for its own use, the low earth orbit carrying capacity of this aerospace aircraft, It can reach at least 100 tons.


    So even if it is normal, many people have seen from these data that the actual low earth orbit transportation capacity of this aerospace aircraft has not said anything.


    Most importantly, Wang Tong and others have noticed that there is a large diameter rocket nozzle on both sides of the wing of this aerospace aircraft in each lesson, so its maximum low earth orbit transportation capacity will be improved, but it is still difficult to meet their publicity data standards.


    At this time, the first Trans atmospheric flight of their ark, an aerospace aircraft, has not ended, because the air force aircraft still faces a major problem to break through, that is, re-entry into the atmosphere.


    If it is unable to return to the atmosphere recently, it means that the aerial plane is actually no different from the rocket, and its carrying capacity is even lower than that of a rocket of the same level.


    Entering the atmosphere is definitely a huge problem for an aerospace aircraft. After all, after such a high speed, the friction between the aerospace aircraft and the air will produce severe high temperature and high pressure, which has high requirements for the aircraft strength and materials of the aerospace aircraft.


    However, everyone of M iron universe exploration company, including their president, is not worried at all, because the materials they use in the skin of the overhead SkyPlane are from Tiangong technology. At the same time, the thermal insulation coating on the outside of the skin of the overhead SkyPlane is also from Tiangong technology, and it is also the thermal insulation coating of Tiangong technology''s own version, So in fact, for their company, the real test of entering the atmosphere is whether their design of aerospace aircraft is reasonable. If it is reasonable, entering the atmosphere is definitely not a difficult problem as long as the angle does not deviate and the aircraft attitude center of gravity is within the allowable range of the data.


    However, even so, in the whole control center, everyone stared at the data on the screen for fear of red words.


    After all, once the red data appears, it means that there is a problem with the aerospace plane.


    Fortunately, the plane did not live up to everyone''s expectations. When it returned to the atmosphere and reduced its speed to Mach 2, all the data of the aerospace plane were very normal. At this time, everyone was relieved.


    Because at this time, the test flight of their company''s aerospace aircraft can be said to have been successful. After all, there is absolutely no difficulty for the experienced bald eagle to fly in the atmosphere. Even if there is any problem, the pilots on the aircraft can parachute in time.


    Sure enough, as everyone expected, then the overhead plane landed on the airport runway of m-iron universe exploration company without any accident.


    So when the ark space plane landed steadily at M iron universe exploration company, all the personnel of the whole m iron universe exploration company burst into warm applause, even the official of their bald eagle.


    You should know that in the past, only Tiangong technology was the company or space agency that could produce medium and large space shuttles in the whole earth and human civilization. Now their company has finally broken the monopoly of Tiangong technology. With the landing of the space shuttle, it marks the second human civilization, A company capable of producing medium and large aerospace aircraft was born, although many products of this company use Tiangong technology, including engines.


    However, they firmly believe that one day their company will be able to independently develop, design and produce its own aerospace aircraft, including all parts in the aerospace aircraft.


    Moreover, their company is also moving in this direction. After all, as an aerospace aircraft R & D, design and production company, the engine, as the core part of the aerospace aircraft, must be able to produce independently, so that it will not be controlled by others in the end, because they don''t want to be suddenly provided with engines by Tiangong technology, That''s definitely fatal for their company.


    As for the direction of their company''s research and development of aerospace aircraft engine, it is different from the pulse detonation engine of Tiangong technology and the variable cycle engine of X aerospace company.


    Their R & D direction focuses on the more mature ramjet. After all, compared with the start-up, cycle engine and pulse detonation engine, the technical difficulty of ramjet is relatively low and it is easier to achieve technical breakthrough.