Final assembly workshop.

At first glance, if you don't pay attention, you think it's a turbofan 16A engine, but if you look closely, it's a little different, especially the size of the fan part is a little different from the turbofan 16A engine.

This is a turbofan 16B engine!

A total of two turbofan 16B engine prototypes, the first of which has entered the final assembly, the other one, also into the assembly of components, it is estimated that in a few days, the second turbofan 16B will also begin to enter the final assembly.

Several assembly workers, skilled in action, assembled everything in an orderly manner, most of the assembly was completed in one morning, and even the fan part has been assembled with the engine.

"Lao Wang, this turbofan 16B is basically the same as the turbofan 16A engine we assembled before."

"Well, the difference is mainly in the fan, you see this fan, it's very beautiful."

The fan part is sprayed with black and white patterns, black is the background color, white is the rotation pattern, and the rotation direction is the same as the rotation direction of the fan, it looks as if the fan is slowly rotating, with a dynamic beauty.

"Lao Liu, in the afternoon, we will start assembling the accessories and control parts of the engine!"

"Yes, we will finish work in the afternoon and complete the assembly of this turbofan 16B engine."

Now, the standard assembly time of a turbofan 16A engine is that four people work together to complete the assembly in 8 hours, and this turbofan 16B engine is the same.

In the afternoon, it was close to the end of work.

The turbofan 16B engine was fully assembled, and everyone began to lift the engine off the assembly bench and put it on the conversion tooling. After a while, it will be transferred to the test engineering center, and the factory verification test will start tomorrow morning.

By the time the engine was hoisted to the transfer tooling, it was close to the end of work, and many workers had already begun to pack their things and prepare to wash their hands and get off work.

Everyone passed by this turbofan 16B engine and saw this engine. Especially when I saw the different beautiful patterns of the engine fan part, many people's eyes lit up!

"This is our turbofan 16B engine!"

"It's so beautifully designed, you look at this fan, it looks like it's moving!"

"This is the turbofan 16B engine that will be installed on the Airbus A320 aircraft!"

“……”

Seeing this engine, the employees of the assembly workshop were all hotly discussed, and their faces were happy, everyone knew that this was their own turbofan 16B engine. And it will be installed on the Airbus A320 passenger plane, perhaps, it will not be long before the Chinese people can take the Airbus A320 passenger plane equipped with a turbofan 16B engine.

According to Airbus's plan, the turbofan 16B engine will first serve the Chinese market, and if the turbofan 16B engine successfully passes the Airbus verification test flight, it will be installed on some Airbus A320 passenger aircraft ordered by domestic customers.

Quite a few workers passed by this turbofan 16B engine. will stop to take a look and chat a few words.

"Look. This turbofan 16 engine has a slightly larger fan than before. ”

"Yes, it's a little bigger, looking at the size of the fan, it should be one meter seven or eight!"

The turbofan 16B engine has been enlarged to match the engine compartment of the Airbus A320 aircraft. Correspondingly, the engine channel ratio has also been increased.

In terms of appearance, the turbofan 16B fan is slightly larger than the turbofan 16A, and in terms of performance, the channel ratio is larger. In addition, the engine fuel consumption is reduced by 5% to 7% compared to the turbofan 16A, and the noise is reduced by 3 decibels.

In other words, the comprehensive performance of the turbofan 16B engine is slightly higher than that of the turbofan 16A engine, especially in terms of fuel consumption and noise.

Li Tianfeng knew that the first turbofan 16B engine was assembled today, because the difference between the turbofan 16B and the turbofan 16A is really not big, and the assembly workers have rich experience, and Li Tianfeng is very relieved about the final assembly of the turbofan 16B engine.

Li Tianfeng originally planned to take a look at the assembly of the first turbofan 16B engine in the afternoon, but it happened that Liu Wei sent a research report.

This is a "research report on the market demand for military and civilian turbofan machines in the next 10 years", which Li Tianfeng is more concerned about, so as soon as he got the report, he looked at it very carefully and was very engrossed.

The report analyzes and predicts that in the next 10 years, China will need about 800 150-seat trunk airliners alone, plus large aircraft for other purposes, a total of about 3,750 military and civilian large-bypass turbofan engines, with a total value of 41.2 billion US dollars, equivalent to about 330 billion yuan.

The large bypass turbofan engine has a wide range of uses, a huge market, and significant economic, military and social benefits, and has a major role in promoting the development of the national economy, national defense construction and scientific and technological progress.

In the international market of civil large-bypass ratio turbofan engines, the engine of the 150-seat mainline airliner is the mainstream product. It is predicted that in the next 10 years, the world's 150-seat mainline airliner will need at least 25,000 engines, accounting for about 73% of the civil engine market.

At present, the typical 150-seat mainline aircraft with large bypass ratio turbofan engines are CFM 56 engines from CFM International and V2500 engines from IAE.

After reading the report, Li Tianfeng thought in his heart that the future international market, especially in the 150-seat trunk airliner engine market, will have its own place.

The first prototype of the turbofan 16B engine was assembled, and the main competitors of this model in the international market were the CFM56 engine and the V2500 engine.

Li Tianfeng knows more about the CFM56 engine and V2500 engine, and in his heart, Li Tianfeng knows the advantages of his turbofan 16B engine.

The maximum thrust of the turbofan 16B engine can exceed 50,000 pounds, and the two engines of CFM56 and V2500 engines have a maximum thrust of more than 30,000 pounds.

Strong power does not mean that it is high fuel consumption, which is precisely where the turbofan 16B engine is more advanced, on the contrary, under the same thrust, the fuel consumption of the turbofan 16B is about 10% lower than these two engines.

When the plane flies, the engine is not in a state of maximum thrust, but in a relatively small, very economical state of thrust.

The previous turbofan 16A engine, powered by the C919 airliner, had less than 10,000 pounds of thrust when cruising, which was a very economical operating condition.

Whether it is a turbofan 16A or a turbofan 16B engine, it has a very advanced fuel regulation system and a very advanced engine control system, which can control the engine state very well and output the most appropriate thrust according to the specific situation.

Li Tianfeng knew in his heart that because at the beginning of development, the turbofan 16 engine was positioned as a civilian turbofan engine, and the performance of competing models was fully considered, so the turbofan 16 engine was better than the CFM56 and V2500 engines.

This is outstanding not only in terms of low fuel consumption, low noise and low emissions, but also in terms of strong thrust, wider use, as well as superior maintainability, high safety and reliability.

However, the turbofan 16 engine needs others to understand it and recognize it, and the turbofan 16B engine can be installed on the Airbus A320 engine for test flight, which will be a good opportunity, a very good opportunity.

………

Commissioning Engineering Center.

The turbofan 16B engine has been installed on the test bench and is ready to go, with several test drivers in place.

The test alarm bell rang, and then a burst of whistles could be faintly heard, which was the staff outside the test bench telling everyone to stay away from the test bench and retreat to a safe area.

The test alarm bell rang for the second time, and several test drivers sat in front of the test console with calm expressions, looking at the instruments in front of them.

Li Tianfeng, Sun Xiaoping, Qiu Wenan, etc. all stood there, everyone stood in the test monitoring control room, looking at the turbofan 16B engine on the test bench through the huge glass.

The alarm bell rang for the third test run......

As soon as the alarm bell rang, Li Tianfeng personally waved his hand and said, "Start the test drive!" ”

The test commander next to him immediately shouted loudly, "Start the test run!! ”

One of the test drivers gently pressed the start button, and through the glass, everyone could see that the turbofan 16B engine began to rotate under the drive of the starter.

In the state of slow driving, rotate for two minutes, and see that everything is normal, and the test commander begins to direct everyone to test one project after another according to the test subject.

Li Tianfeng took a look at the turbofan 16 engine on the test bench, pricked up his ears to listen to the sound, and occasionally looked at the test data on the LCD screens of the test console.

Li Tianfeng nodded, the test situation was good, everything was good.

Although there will be no 30-hour or 50-hour long-term test runs, a series of verification tests will be carried out, and various states of the engine, such as slow state, cruising state, rated power state, take-off state, etc., will be tested one by one.

And it is still two installations and two tests, because this is the engine that will be installed on the Airbus A320 passenger aircraft for a series of verification flights, for the sake of prudence, Li Tianfeng decided to take two installations and two tests.

The so-called two installations and two tests means that the engine is tested twice and assembled twice. The first test run, the engine is disassembled and checked, and then reassembled, and then those test items are repeated again, and there is no problem with the two test runs, and the engine can leave the factory.

………

Continue to three more today, the first one will be sent! (To be continued......)