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There are very few domestic private aircraft manufacturing enterprises. To establish such a private aircraft manufacturing enterprise, you need to apply to the relevant departments. This matter is very complicated, but it has to be done.

During the approval process, Liu Zhiyuan called Tang Xiaochuan to report that day: "Boss, the higher-ups are planning to send someone over to review our qualifications to start aircraft manufacturing. During the period, we may inspect and visit our parts manufacturing factory!"

Tang Xiaochuan said: "This is a good thing. It shows that the relevant departments still attach great importance to our application to establish an aircraft manufacturing enterprise. You should prepare carefully and call me when the leader is coming!"

"OK!"

That night, Tang Xiaochuan received a call from Liu Zhiyuan, saying that the inspection leader would come over tomorrow morning.

Early the next morning, Tang Xiaochuan and Feitian Technology Group received a group of leaders who came to investigate downstairs in Feitian Building.

"Boss, this is Director Luo who led the team to inspect our company's qualifications!"

"Director Luo, this is Boss Tang from our group!"

Tang Xiaochuan stepped forward, "Welcome the leader to come to our group to inspect the work!"

Director Luo shook hands with Tang Xiaochuan and said with a smile: "Boss Tang, you are welcome. After your group handed over the application materials, we held several meetings in a row. Now there are not many private enterprises in the field of aviation manufacturing in China, mainly because The research and development of aircraft manufacturing is intensive and requires a lot of investment. Even if the investment is not necessarily rewarding, it is not that there are no private entrepreneurs who want to get involved in this field before, but it is because there is no technical research and development force, let alone strong funds to invest in research and development. Going, I was even more worried that there would be no return after the investment, and finally gave up helplessly. Others have no courage, this time I hope we did not come in vain, and I hope that your group can support the domestic private aircraft manufacturing industry!"

Tang Xiaochuan immediately said: "At present, many subsidiaries of our group are mainly engaged in the production of aviation parts and raw materials, such as screws and nuts on aircraft, welding materials, alloy shell plates, windshields, avionics equipment, etc. Now we We have developed an aero-engine with liquid hydrogen as the main fuel, and our group can independently produce these key components, and we already have the ability to independently manufacture civil aviation passenger aircraft, agricultural and forestry aircraft, and private aircraft!"

Director Luo nodded: "I believe that your group can manufacture other parts of the aircraft independently. I also heard that your aviation materials and parts have a good reputation in foreign trade. This time I came here for the liquid hydrogen fueled aircraft engine Come!"

"Then please ask the leader to inspect our group headquarters first, and then go to the engine test site!"

Director Luo waved his hand: "I won't go to your group headquarters, let's go directly to the engine testing ground!"

"That's fine!" Tang Xiaochuan agreed, and immediately asked Liu Zhiyuan to prepare the vehicle.

A group of more than a dozen vehicles came out of the Feitian Building and drove for more than two hours before arriving at the aero-engine test site in the suburbs. After strict inspection, the convoy was able to enter.

After the car passed the gate and passed the inspection, Director Luo said to Tang Xiaochuan: "Boss Tang, your safety work here is very strict. It seems that you have a high awareness of safety!"

Tang Xiaochuan explained: "There is no way. Since our company started with the production of lithography machines and chips, it has attracted the attention of many domestic and foreign companies with a little reputation. If these companies want to cooperate with us, think about it. We can also consider asking us to authorize its technology, etc., but these people want to get something for nothing, and hire some international thieves to steal technical information. In the past three years, our company has been patronized by international thieves no less than Twenty times, do you think you can be angry?"

"If all companies don't want to invest in research and development of new technologies or upgrade old technologies, but only want to steal from other companies, how can this society progress? Those companies that invest heavily in technology research and development Looking at the technology I just researched, it was stolen before I could make a profit. I am afraid that I don’t want to engage in technology research and development. It is better to pay some people to steal it. If things go on like this, a vicious circle will be formed. The development of science and technology It will stop!"

Director Luo nodded and said: "Boss Tang is right, so we have always hated and severely punished this kind of behavior!"

The convoy stopped beside a runway. After getting off the car, Director Luo saw a hangar at the end of the runway. There seemed to be an aircraft in the hangar, and some ground crews were busy.

"Hey, you have already made the finished product?"

Tang Xiaochuan said: "Leader, this is a test plane, and we have built such a plane now! We hired three retired pilots as test pilots, and these ground crews were also poached from various airlines!"

"Can I go over and have a look?"

"Of course, leader please!"

When he got closer, Director Luo's eyes widened, "It's such a big plane, it's bigger than ordinary civil aviation airliners!"

Tang Xiaochuan said: "Yes, it is slightly larger than ordinary Minghang airliners, and the passenger capacity is also larger. While carrying passengers, there is still a lot of space in the luggage compartment to carry cargo!"

Director Luo and his team walked up to the plane in the hangar, and they found that the plane was really beautiful. With their eyes, they could tell that the quality of the plane was excellent, with exquisite paint, strong fuselage and wings, bright The transparent machine window glass is quite exquisite in workmanship.

One of Director Luo's entourage asked, "As expected of a large technological manufacturing company, this aircraft is so beautifully made, can you take a test flight?"

Professor Liang said: "Of course, we have applied for a test flight permit in the nearby airspace!"

Under Professor Liang's arrangement and command, the ground crew quickly completed the inspection and maintenance work, and began to inject liquid hydrogen fuel into the aircraft.

Tang Xiaochuan introduced to Director Luo and others: "That is the equipment for injecting liquid hydrogen fuel into the aircraft, but don't worry everyone, our equipment is very safe, and there will be no liquid hydrogen leakage and explosion accidents!"

After the refueling was complete, the test pilots boarded the plane in their uniforms, and a co-pilot came on board to assist.

Only a few minutes later, the plane's engine started, and under the pilot's operation, the plane slowly moved out of the hangar and onto the runway.

Director Luo asked, "Why does this plane have four engines? The two outermost small engines on both sides don't seem to be working?"

Tang Xiaochuan said: "These two are auxiliary engines, which generally do not need to be used, but they have a great effect. If the aircraft encounters a storm cloud during the flight, the auxiliary engines can be turned on to allow the aircraft to increase altitude. Leave the storm cloud area at an altitude of tens of thousands of meters, and it also plays a great role in the stability of the flight! If the main engine fails, even if the two main engines cannot work normally, only two auxiliary engines can Let the plane return safely at a lower altitude!"

"These two auxiliary engines seem to be superfluous and superfluous, but they can make the aircraft land safely in many dangerous situations. The engine can make the plane glide and land, and if it is used well, the plane will land slowly and smoothly!"

At this time, the captain of the test pilot had already accelerated the plane on the runway, the turbine blades were spinning at a high speed, and everyone could feel the airflow from a long distance away.

The skill of the pilot is very high, the plane has a lot of power, but he didn't let the speed of the plane increase to the maximum all at once, but he calculated the distance of the runway, and after the plane ran two-thirds of its length The auxiliary engine was turned on. After the auxiliary engine was turned on, the nose of the aircraft began to rise, and the aircraft slowly left the ground very smoothly.

The auxiliary engine was turned off after only running for more than ten seconds, and then it was completely powered by the main engine. In fact, the main engine can lift the plane normally without the auxiliary engine, but you can try them by turning on the auxiliary engine Whether it can operate normally, and doing so can also make the plane take off more smoothly.

Some of the entourage of the inspection team said in surprise: "This plane is so fast. It looks so big, but I didn't expect it to be so flexible when turning and pulling up!"

Someone next to him said: "Liquid hydrogen is used to make rocket propellants. Can it be used as fuel for airplanes to make airplanes fly faster?"

Professor Liang held the intercom and asked, "Test pilot No. 2, how is the situation of the plane?"

"Everything is normal, everything is normal!" The test pilot's calm voice came from the intercom.

Director Luo asked Tang Xiaochuan: "Boss Tang, if this plane flies once, how does its input cost, such as fuel, compare with the fuel cost of a traditional civil aviation airliner?"

Tang Xiaochuan said: "It is much cheaper. We have already compressed the production cost as much as possible. Liquid hydrogen energy vehicles use this kind of liquid hydrogen, and using it is similar to using gasoline!"

"This is a great advantage. In addition, the use of liquid hydrogen has no pollution and the speed is fast. These three factors add up to a considerable advantage!" Director Luo said.

An accompanying staff member smiled and said: "According to me, the speed of this plane is a bit wasteful. Civil aviation airliners don't need such a fast speed. It would be very appropriate to use this speed for bombers and large transport planes. Can this technology be used on fighter planes!"

The others didn't respond, they only thought he was joking, but Director Luo was taken aback for a moment, he seemed to realize something, but he didn't say anything.

The plane landed after flying in the test flight airspace for more than an hour, and it landed very smoothly.

"The technology of this plane is quite mature!" Director Luo sighed inwardly.