In the small conference room of COMAC Group, at this moment, a meeting related to the future of COMAC Group is underway.

Wang Dazhi, as the general manager of the group, sat in the center of the conference table, he coughed lightly, and said: "Comrades, after several months of research, now, please the heads of various departments, branches and subsidiaries, decibel to introduce to you their research results in large wide-body passenger aircraft, below, first of all, Comrade Nie Guang, the head of the engine branch, to introduce to us the development of our high-thrust engine. ”

"Hello comrades, as the person in charge of the group's aero engine branch, I will introduce to you the development of the group's latest high-thrust aero engine," facing everyone's eyes, Nie Guang bowed slightly to everyone, and then said: "As early as three years ago, under the instructions of Mr. Chen Geng, the former chairman of the group and chairman of the group's strategic executive committee, our company began to develop a new generation of engines.

According to Mr. Chen's instructions, and combined with our actual situation, our aero engine branch has three goals in the next 10 years:

The first is to achieve full digital control of all its aero engines;

The second is to achieve a large bypass ratio for the existing 'Tay' series engines to make them more fuel-efficient;

The third, based on the RB211 engine, achieves a maximum thrust of 300KN. ”

Does the RB211 engine have the level to meet and exceed 300KN thrust?

There is no doubt about this, Rolls-Royce Group's new generation of high-thrust engine "Trent Da" series, in fact, can be regarded as its second-generation RB211, this point, no matter how you do it, everyone knows it, so no one spoke, listen to Nie Guang continue to say.

"First of all, the first goal, in the first year, we have successfully realized the modification of the current RB211 engine and the 'tay' series of engines with full authority digital control system, and after 2 years of testing, the operation of this system is very reliable and good, has officially passed the national acceptance, becoming China's first set of real commercial aircraft engine full authority digital control system ......"

"Let me interrupt," someone suddenly raised his hand to Nie Guang and asked, "Manager Nie, after this set of engine full power digital control system, how is the fuel-saving effect?"

"This is what I am going to introduce to you next," Nie Guang's face was full of red light as soon as he said this: "According to our actual test, after using the full power digital control system to accurately supply fuel to the engine, the 'tay' series engine with small and medium bypass ratio can save about 7.2% of fuel, and the RB211 series can save about 5.4% of fuel." ”

"So much?"

"5%?"

"Good boy, this is amazing......"

............

Everyone immediately talked about it.

After the use of full digital control technology, the engine will have a significant fuel-saving effect than the previous mechanical hydraulic control or analog electronic control, which we all know, just as the engine with carburetor fuel supply will be more fuel-efficient than the engine with EFI system supply, because the EFI system can supply the engine more accurately.

But this fuel-saving effect is still beyond everyone's imagination, and as the top commercial aircraft manufacturer in China, we know too well what it means to save 5% of fuel, which is a data that can definitely affect the user's purchasing tendency.

As for why the fuel-saving effect on the "TAY" series engines is more obvious, the reason is actually very simple: the "TAY" series is a small and medium-sized bypass ratio engine.

Seeing that everyone was so happy, Nie Guang was also very happy, and when he felt that everyone was almost done, he continued: "In addition, I will tell you a good news, this result is not the optimal result, or because the sampling ratio is too small, and we are not good enough in terms of programs and algorithms. ”

Hearing Nie Guang say this, everyone is talking again, and the happiest is undoubtedly the people of the sales company, for the people who sell the company, this is where the competitiveness of the company's products lies, and it is also the biggest weapon that they can convince the airlines...... One.

"Okay, it's all quiet," the conference room was so noisy that Wang Dazhi had to come out in person to support the situation: "Old Nie, let's talk about the second point." ”

"Okay," Nie Guang nodded, and then said: "Regarding the second point, on the basis of the 'TAY' series of engines, the realization of large bypass ratio, or on the basis of the core engine of the 'TAY' series of engines, the development of a new generation of large bypass ratio engines.

Through the installation of the IAE2500 series and CFM56 series engines on the Boeing 737 and Airbus A320, the world's most mainstream short- and medium-range narrow-body trunk aircraft, you should have seen that in the future, in the field of aero engines of the medium thrust class of 90KN to 150KN, the more fuel-efficient large bypass ratio engine is the absolute mainstream.

In view of this, under the instruction of Mr. Chen, our aero engine branch has started the research of a new generation of large bypass ratio medium thrust aero engine based on the 'tay' engine, which is not only fully on par with the CFM56 series and IAE2500 series in terms of bypass ratio, but also fully equipped with a full digital control system.

Now everything is going well, and it is expected that in the second half of the year, our new generation of mid-push engines will begin experimental assembly and testing;

As for the third point, which is also the point that everyone is most concerned about in this meeting, the RB211 engine with a thrust level of 300KN," Speaking of this, Nie Guang paused slightly, and then said: "According to the meaning of Chen Dong, and also referring to the actual situation of our engine branch, we will take this engine in two steps; the first step is to increase the thrust by 18% on the basis of the current RB211 engine The thrust of about 250KN is realized, and the engine is fully digitally controlled, and the second step, on the basis of the first step, the thrust is increased by 20% to achieve the thrust of 300KN ......"

Listening to Nie Guang's slow and logical words, a boss of the sales company couldn't help it and interrupted Nie Guang's words: "Old Nie, let's talk about it directly, what step have you achieved?"

"The first step is half done. Nie Guang said immediately.

"Half done?" the questioner was stunned for a moment, "What do you mean half done?"

Nie Guang said slowly: "It means that we have achieved a maximum thrust of 250KN on the basis of the existing engine fuel control system, but we have not yet installed and tested a new engine full power digital control system. ”

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