In addition, there were no advanced equipment such as computers from later generations for research. They used their hands to draw drawings and calculate experimental data, so their work efficiency was much worse than that of later generations. However, because they had the careful guidance of virtual teachers and provided advanced theoretical knowledge in later generations, theoretical problems were relatively easy to solve, and many practical details still needed these researchers to explore slowly.

Although the research center is not as strong as some foreign universities and research institutes in terms of experimental equipment and number and experience as well as the number and experience of researchers, their advantages are also very obvious. With later technical drawings and detailed technical data guidance, you can avoid many detours and the research direction is very clear.

Two soldiers stood at the center door carrying guns. When they saw Li Tiancheng, they nodded and paid tribute. Li Tiancheng took Ma Chaoyun and Lu Yuzheng into the glass door, turned a corner and went to an isolation door and pushed the door in. There was a laboratory with several large workbenches distributed, as well as many instruments and tools. More than a dozen staff wearing uniform green work clothes were discussing something on a test bench.

"Thank you for your hard work, what secrets are you discussing?" Li Tiancheng walked over and smiled and greeted a man in his thirties. He was Han Xiang, director of the Engine Research Office.

"Chairman, why do you have time to come here for inspection today? I'll ask someone to pour tea for the director." Han Xiang turned around and bowed when he saw Li Tiancheng suddenly appear.

"No need, we'll have something to do later. This guy is just a piston engine, right?" Li Tiancheng was still in a hurry to let Han Xiang not be polite, and then pointed to a device on the table and asked.

"This is an aviation piston engine developed in accordance with the instructions of the chairman, with a power of 2,000 kW." Han Xiang immediately pointed at the engine and explained.

"This engine is air-cooled star type, with four-discharge cylinders and a displacement of 70 liters,..." The man began to briefly introduce the structure of the piston engine.

This piston engine is an old-fashioned engine. Helicopter engines in the 21st century later used turboshaft engines. Because China's transmitter technology was backward at that time, it was impossible to create a stable turboshaft engine. For example, although the performance of later wuzhishi was very advanced, the engine technology was still not fully mastered and it needed to rely on imports. Moreover, wuzhishi did not have the ability to combat the plateau, which was weaker than the Apache in the United States and carried half of the number of anti-tank missiles.

Li Tiancheng provided limited technical information, and the R&D personnel only temporarily developed this high-power piston engine, which is the technology used by the first generation of helicopters. Helicopters driven by turboshaft engines still need to wait until they are researched and developed later.

Later China lags far behind advanced countries such as Europe, America and Japan in the field of engines of automobiles and aircraft. The main reason is that the engine and other components are not up to standard, and the parts assembly accuracy is insufficient, resulting in defects such as high engine noise, high failure rate, low reliability and life. In addition, the steel used in the body is not dense enough, and the impact resistance is naturally poor.

The Black Hawk helicopters from the 1980s bought by China in the later generations were not completely digested and absorbed by the 21st century. This is because the domestic materials and other industrial foundations were too poor and they could not imitate the same type of products. Therefore, in terms of aircraft engines, the technical information that Li Tiancheng could provide was naturally lagging behind the advanced technologies of Europe and the United States in later generations.

At present, the world's industry is not yet developed enough. The imported and domestic materials and parts production processes provided are much worse than those in later generations. The strength and toughness of mechanical components such as transmission shafts, crankshafts, connecting rods, flywheels are not as strong as those in later generations, so the wear will be very large when used. In addition, the processing and assembly accuracy of parts is poor. Some parts that require precision sizes do not meet the accuracy requirements, and problems will arise between parts. For example, the matching accuracy of screws and nuts is not high, and it is easy to loosen over time, or uneven stress may occur, resulting in damage and breakage. At the least, the helicopter cannot work normally, and at the worst, the aircraft will be destroyed and killed.

Therefore, the helicopter developed at this time is not very stable and reliable. It is just a test product for emergency use. Generally, it cannot be used frequently. Moreover, before each use, it must be carefully checked for any defects inside. After each task, it must be carefully checked. If the parts fall off or are damaged, it must be replaced and repaired in time.

In addition, this helicopter engine was manufactured in accordance with the old engine technology learned from foreign technology in later generations. This engine is also poor in terms of engine heat resistance and long-lasting working ability. The failure rate will be higher when used for too long, and the reliability is not guaranteed. Therefore, it is not a complete model and is not suitable for large-scale production and use. However, in case of emergencies, it can be used temporarily. This is also the reason why Li Tiancheng was rushing to develop the helicopter.

This helicopter is generally the first-generation piston helicopter, which is behind the second, third and fourth generations. However, the rotor is also equipped with the all-metal rotor of the second-generation helicopter, which is stronger than the first-generation wooden and metal structure, and the rotor life has also been increased from 600 hours to 1,000 hours.

Despite so many disadvantages, due to the support of later materials knowledge, most of the key metallic components of this helicopter have passed some tests such as stress, torque resistance, etc., and the toughness and strength indicators are basically qualified, and a small number are replaced by inferior materials. There are also some components with complex structures, such as rotor twisting, which are difficult to manufacture and slightly changed in design, and their performance is naturally affected.

To sum up, there are certain problems with the reliability of this helicopter, but when it is not used for a lot of times, it can ensure its safety when performing tasks. If the use time exceeds a certain number of hours, some parts inside are probably unable to hold on and severe failures such as breakage and damage will occur. Therefore, the designers who study it suggest that before the materials, design, manufacturing process, etc. have been fully improved, timely maintenance can be taken and some key stress-bearing components can be frequently replaced to minimize the possible failures, and the number of usages must be strictly limited.

With helicopters, their purpose is very special and eye-catching. They can quickly transport a certain number of special forces or other personnel to the enemy, destroy and damage the enemy's headquarters or important departments, equipment, etc., and have great uses when necessary. Therefore, Li Tiancheng took the risk of developing it.

"Okay, you have done a good job and we will continue to work hard in the future!"

Li Tiancheng inspected the engine center for about a quarter of an hour and asked about their research progress, whether the funds were in place, what difficulties were there, etc.

"Now take us to the factory to see the real guy!" Li Tiancheng then said to the man.

Under the guidance of the man, the group walked out of the central gate and walked forward about a hundred meters. When they saw a closed factory gate, two soldiers were guarding the door. When they saw the visiting person, the soldiers immediately took out the key hanging on their waists and opened the door. The thick and wide iron door made a dull sound and was pushed open from both sides.

There is no production line in the factory, only some instruments and tools, the space is about 1,000 square meters, and four big guys covered by canvas were exposed in front. After Li Tiancheng opened the canvas, four big iron guys were exposed, which were four helicopters.

"Mr. Li, what is this?" Seeing this, Ma Chaoyun and Lu Yuzheng immediately stared at the sky blue guy who was more than fourteen meters long and four or five meters high, and asked in confusion.

"This is what I told you. It is called a helicopter. It can fly in the sky and take us to the sky." Li Tiancheng smiled mysteriously. He knew that they had never seen the world before, so he would be surprised.

"Is this true when flying to the sky? Mr. Li's high technology really makes Ma more and more respectful!" Ma Chaoyun still didn't believe Li Tiancheng's words. In this era, the concept of airplanes had not yet appeared. Ordinary people had never even thought about how to fly in the sky, and they were stunned.

This helicopter was created by Li Tiancheng's order to the Research Center. Its appearance is imitated by later generations of the People's Liberation Army's 8 multi-purpose helicopter, but it is slightly smaller in size and temporarily uses sky blue paint.

This helicopter has reserved space for radar antennas, radar covers and other electronic equipment. Radar and other advanced electronic equipment have not been installed yet. There is only a simple radio communication device that can transmit information for a long distance, communicate with the ground and other helicopters, and has initially equipped with voice dialogue functions.

This helicopter can carry up to twenty people and can carry fifteen fully armed soldiers. When not full, it can carry three torpedoes, and two missiles or rockets can be added. In addition, two 20 mm caliber cannons are designed to perform ground-to-sea attack missions, and can load airdrop bombs dropped by manpower if necessary.

This helicopter is named "Monster Bird". Its maximum combat radius can reach 500 kilometers and a ceiling of 6,000 meters. It can perform various tasks such as patrol, reconnaissance, communication, command, search and rescue, ground attack, anti-ship, etc. In the future, it will also be equipped with sonar and perform anti-submarine missions.

However, these aircraft are still test products. Parts are customized and partly produced by themselves. Although there have been no major problems after the test and can basically perform tasks of a certain length of time, the test time is only a few months, so there is no problem to perform several tasks temporarily. It is too early to be used as the equipment of the army. A series of tests need to be further carried out and more advanced related supporting industries can be finally finalized and put into production in large quantities.

In addition, Zhenhua currently does not have a special aircraft manufacturer and cannot mass produce helicopters. With the results of the Engine Research Center, the next tests of cars, fighter jets, bombers, and reconnaissance aircraft will be launched soon, and fighter models with advanced levels of World War I will take the stage one after another.

"This is the outstanding design result of our engineers, and our results like this will continue to emerge in the future." Li Tiancheng said proudly.

"I have long seen that Mr. Li is not simple. No wonder you are always calm and natural when encountering problems. It is true that you are hidden and uncovered!" Ma Chaoyun firmly believed in his judgment at this time. Li Tiancheng was a guy who could not be used to speculate with common sense. He did not choose to follow the wrong person.

"Open the skylight of the factory and let's fly up and try it!" Li Tianzhi ordered immediately.

This factory is specially designed for parking helicopters, and the ceiling above can be opened to facilitate helicopter takeoff and landing.

"Can we fly to the sky now?" Lu Yuzheng was still a little disbelief at this time, and said with his nose slightly raised.

"Of course, this will give you a try to fly in the blue sky!"

A pilot who knew how to fly inside the center immediately rushed over. The skylight had been opened by the soldiers' electric control. A group of more than a dozen people got on the helicopter one after another, sat on the seats on both sides, and then the pilot closed the cabin door.
Chapter completed!