Chapter 538

After all, the verification of the fly by wire control system can not be completed in one or two days. It is a little bit of exploration through theoretical calculation combined with the real flight data of the aircraft. Therefore, in order to speed up the development progress, in addition to the round the clock calculation and design of the project team, the most important thing is the actual type of aircraft regardless of the cost of multiple flight tests, showing its own performance to the best of its ability, so as to speed up the development It is convenient to use these data to form a real flight envelope and input it into the fly by wire control system.

Naturally, the state is aware of the importance of the Telex system. However, there are too few advanced aircraft on hand. It can only allocate two j-7s to Guo Xiaobo's team for experimental research.

However, due to various reasons, the maintenance of the two j-7s is very complicated, the attendance rate is not high, and they can't bear the high-intensity flight test work. As a result, Guo Xiaobo's theory can't be verified even if it is done.

After thinking about it, he found Zhuang Jianye, hoping that Tengfei group could provide a yun-6a business aircraft for daily flight envelope verification flight with its good attendance rate, while two jian-7s with difficult maintenance were specially used for high maneuver flight.

In this way, even if the J-7 is lying in the nest, the telex control system project team led by Guo Xiaobo will not stop because of the lack of experimental verification aircraft.

There is no way. The field of aviation scientific research is a comprehensive discipline that attaches equal importance to theory and practice. Although telex control is a sub project of aviation scientific research, it is also inseparable from this iron law.

Because of this, the aviation platform for experimental verification is not important, but very important.

Even in a sense, the number and level of experimental verification aviation platform can reflect the strength of a country's aviation technology.

This can be seen from the various test and verification machines of the United States and the Soviet Union. Without the bedding of test and verification machines that are crazy and seemingly useless, the United States and the Soviet Union can not have such subversive aviation industrial crystals as F-15, F-16, Su-27 and MiG-29.

In this respect, there is indeed a big gap between China and foreign aviation industry powers, not to mention building special verification machines, even few platforms suitable for refitting.

Zhuang Jianye is naturally clear about the current situation in China, so Guo Xiaobo found out that Zhuang Jianye did not hesitate at all, and agreed to provide the top version of yun-6a for flight control research institute free of charge.

Not only is the flight platform free of charge, but Zhuang Jianye also provides 30 million yuan of technology research and development funds for the flight control research institute. In addition, once the telex control system based on yun-6a is successfully commercialized, the flight control research institute can draw 10% of the agreement share from the future sales revenue.

What flight control research institute needs to pay is to help us understand the telex control system of yun-6a, which is used for experimental verification, while studying the telex control system of project 10.

No matter Guo Xiaobo or the flight control research institute, they are not at all in conflict with Zhuang Jianye's requirements. Tengfei group gives money and provides aircraft platforms for free. It's also right for them to help develop a set of fly by wire control system for free.

What's more, for them, the fly by wire control system of small aircraft is not very difficult. You should know that Guo Xiaobo's team is working on the fly by wire control system of the third generation fighter. The small passenger and cargo aircraft platform can't compare with the fighter in terms of mobility and performance. In addition, as a verification platform, it needs to be equipped with a set of fly by wire control system for testing and verification, With a slight change, it can be applied to yun-6a.

Of course, there is no problem for Flight Control Institute to install fly by wire control system for yun-6a, but there is a gap between yun-6a and some indexes required by flight control institute in some aspects.

There's nothing to say. If there's a gap, change it. It's just that some key technologies of the advanced light transport platform in the hands of Tengfei group also need to be tested and verified. So we just want to combine two into one, and the change of yun-6a begins.

First, the wing. At first, the support rods fixed on the fuselage were removed, and then the sweep angle and winglets were added. Later, the fuselage was simply re optimized, and a small central wing box was added in the lower abdomen of the fuselage, changing the upper single wing into the lower single wing.

The second is the tail. As the advanced light transport platform is prepared to adopt T-shaped vertical tail, it can reduce the structural weight and increase the loading and unloading flexibility of the rear hatch.

However, in the past, Tengfei group did not have a T-shaped vertical tail. Now it has the yun-6a for verification, so it simply adds it together.

After such a change, the whole aircraft can't see any trace of Er yun-6a. It can be said that it's a brand new aircraft. It's obviously inappropriate to use yun-6a as the code name. But at the moment, I can't think of any other name, so I replaced it with plateau Eagle pro.

Of course, this process has not been smooth sailing and experienced many twists and turns. After all, with too many new technologies, the stability of the aircraft was not high at the initial stage. Coupled with the preliminary test of the fly by wire control system, it encountered many failures at the beginning.

The most serious one was that shortly after the plane took off, the fuselage began to shake uncontrollably. Fortunately, the test pilot was not in a mess in the face of danger and forced to land in the farmland not far from the airport, which did not cause too much accident.As for the small fault is countless, otherwise such a verification model is needless to say, it took almost two years for Tengfei group to complete the optimization of the whole model.

By the time it was selected as a cooperative aircraft by Royal Thai aerospace industry company, the parameters obtained have been roughly determined:

the fuselage is 14.4 meters long, the wingspan is 16.2 meters, the height is 4.2 meters, the maximum take-off weight is 4.9 tons, and the maximum load is 2.3 tons.

The maximum flight altitude of 9452 meters and the maximum flight speed of 443 kmh are given by using a 1200 shaft HP take-off power d-40ml turboprop engine or the same power Pratt Whitney pt6 turboprop engine.

The maximum range of no-load is 3200 km, and that of full oil and full load is 2480 km.

The interior of the engine room adopts modular design, and can be arranged with 14 passenger seats, 9 business seats, 8 business seats and 6 Deluxe seats.

As well as other different types of mixed passenger and freight and simple cargo transport.

As for the flight quality, let alone the use of Honeywell's avionics system and the fly by wire control system specially developed by the flight control research institute, the whole aircraft's maneuverability is very good. In the original words of his royal highness of Thailand after his first flight: "very light, very soft, fast feedback, in some ways, not inferior to some fighters."

Now, the top version of tm-9 Siamese Eagle ordered by his Royal Highness the crown prince of Thailand has just finished rolling in the sky. Seeing that all the expected flight shows have been completed, Xue Qiang and Qin Yibin, two pilots, will fly his Royal Highness the crown prince of Thailand's car back to land. With a sigh, Zhuang Jianye looks around at alondo and nods slightly.

With a tacit smile, alondo immediately turned to get out of the stands. When his Royal Highness the crown prince of Thailand landed on the runway and slowly stopped on the apron, alondo immediately stood in front of the plane and cleared his voice in front of many media reporters around him: "I'm here to announce an important thing. Just an hour ago, Royal Thai Airlines and US reached an agreement An agreement will be signed to purchase 20 tm-9 airplanes with us $150 million. In other words, in the future, ordinary people in Southeast Asia can also enjoy the top-level services on high-end private business airplanes. "