Although it does not take a long time to replace the engines of the three aircraft, Qiu division and their base also sent relevant technicians to Tiangong technology to cooperate with the technicians of Tiangong technology to replace the three non motorized engines.


    This shortened the replacement time that would have required at least half a month by at least half. In just one week, Tiangong technology replaced the engines of the three aircraft.


    With the completion of the engine installation, Qiu Shi''s base immediately conducted a test flight of the three aircraft. The results showed that whether the TG-001 or tg-002 turbojet engine or tg-wsx2 aircraft were used, the overall performance of the aircraft was much better than that before the engine was replaced.


    However, compared with the plane with tg-wsx2 engine, the maximum speed can only reach Mach 2.8 and the maximum practical altitude is 28500 meters.


    The flight altitude and speed of the two aircraft with turbojet engine are much higher. Among them, the aircraft with TG-001 engine can reach a maximum flight altitude of 3200 meters and a maximum speed of Mach 3.3.


    Qiu Shi and others were surprised by the zero speed and altitude. After all, this speed is a real hypersonic aircraft, and it is not a test aircraft or reconnaissance aircraft, but a real fighter.


    The No. 16 fighter, which used the tg-002 turbojet engine, brought no surprise but shock to Qiu division.


    After all, the thrust of the tg-002 turbojet engine is far from that of the 001 engine. Its single thrust is much higher than that of the TG-001. Therefore, the 16th fighter equipped with this engine can theoretically reach a speed of at least Mach 5, and the maximum ceiling can also reach at least 36000 meters.


    Of course, this is only theoretical. In fact, during the test flight, when the maximum speed of the aircraft reached Mach 3.5, division Qiu ordered the test pilots to reduce the speed of the aircraft.


    After all, this aircraft is only the transformation of the ordinary No. 16 fighter. Although Wang Bin and Tiangong technology have carried out a series of reinforcement and sprayed high-temperature resistant coatings on this fighter in the transformation process, if the speed of the aircraft rises again, the body and skin of the aircraft will be unbearable.


    Because when the speed of the aircraft reaches Mach 3.6, the high-temperature coating on the skin of the aircraft has appeared. If the aircraft is accelerated again, the high-temperature coating of the aircraft is likely to fall off, and the consequence is that the skin of the aircraft will surely melt at the high temperature generated at high speed.


    As for the maximum flight altitude, during the test flight, the aircraft once reached a height of 36500 meters, but this altitude is not a practical ceiling, because according to the aircraft record, when the aircraft reached an altitude of 33000 meters, the engine of the aircraft has stopped, because at this altitude, the oxygen concentration contained in the atmosphere is not enough to keep the engine of the aircraft working, So when the plane reaches this altitude, the engine has stopped automatically.


    Of course, the engine flameout of the aircraft does not mean that the aircraft cannot continue to fly upward. After all, at this time, the speed of the aircraft has reached about Mach 3.6. Therefore, after the aircraft flameout, under the action of inertia, the aircraft flew to an altitude of more than 36000 meters and began to decline slowly. When the altitude of the aircraft dropped below 33000 meters, The pilot can restart the engine again.


    Of course, it is precisely because of this that the test flight of the No. 16 aircraft equipped with tg-wsx2 turbojet engine shocked Qiu Shi and others. You know, at such a high altitude and such a fast flight speed, the vast majority of air defense weapons in the world are out of reach, unless they use weapons and energy weapons against satellites.


    However, whether it is the No. 16 fighter equipped with 001 or 002 turbojet engines, it also has its own defects, that is, in terms of endurance.


    You should know that the maximum endurance of the original No. 16 fighter is very good, with a endurance of more than 4000 kilometers. However, after installing the 001 or 002 turbojet engine, its maximum endurance at low altitude has been directly reduced by one third, especially the 002 turbojet engine, There is only less than 3000 kilometers left. Of course, if the aircraft is flying at a high speed at an altitude of more than 30000 meters, the maximum straight-line flight mileage has reached about 4500 kilometers. Such flight mileage has also reached the same level as before.


    As for the one with tg-wsx2 turbofan engine, its maximum range is nearly 500 or 600 kilometers more than that of the original.


    After the test flight of the three No. 16 fighter planes equipped with engines by Tiangong technology, Qiu division and the soldiers of the base were very satisfied.


    At the same time, division Qiu also reported all the data after the test flight of the three aircraft to the superior. Not surprisingly, this report attracted the great attention of the superior, and asked division Qiu to place a batch of orders for 100 engines to Tiangong technology for the transformation and replacement of the remaining batch of No. 16 fighters.


    And unexpectedly, in this order, the number of turbojet engines far exceeds the number of turbofan engines, and the majority of offshore 002 turbojet engines. It can be seen from this that the superior departments pay attention to high-altitude, high-speed, or ultra-high speed aircraft.


    Although the modified No. 16 fighter is not a stealth aircraft, and the aircraft must be sprayed with high temperature resistant coating when flying above Mach 3, it is undeniable that once the aircraft speed exceeds Mach 3, the aircraft''s safety will be greatly increased, and the operational efficiency will be greatly improved, especially in ground combat, Will also be greatly increased.


    After Qiu Shi and Tiangong technology signed the engine order again, the engine manufacturing department of Tiangong technology was also more busy, which forced Wang Bin to buy an engine production line from the mall again, and the annual output of this production line could reach more than 2000 units. At the same time, the automation of this production line was also very high, This greatly alleviates the pressure of Tiangong technology on engine manufacturing capacity.


    Of course, although the production efficiency of this production line is very high, the energy money required to buy this production line is not small, but fortunately, Wang Bin has saved a lot of energy money in his hands. Buying such a production line is no longer painful for Wang Bin.


    Of course, products such as the engine production line, with the capacity of today''s engineering and technology, also have the design and manufacturing capacity. However, due to the time required, it will take at least half a year. If you want to design and build a production line with a high degree of automation, the construction time will at least double, In fact, this is why Wang Bin didn''t let Tiangong technology make it himself, but bought it from the mall.