The first flight of the C919 large passenger aircraft was a perfect success, and the huge impact at home and abroad, as well as the extensive coverage of major media are not mentioned for the time being.

Li Tianfeng was also very happy about the success of the first flight, and what made Li Tianfeng even happier was that with the success of the first flight of the C919 passenger aircraft, the orders for C919 increased by more than 100 aircraft, and several domestic airlines added orders to commercial aviation companies.

The C919 passenger aircraft has not yet been successfully developed, and a series of verification test flights will be carried out in the future, but the number of orders has reached nearly 500, which can be regarded as a small miracle.

Li Tianfeng knows that with the successful first flight of the C919 passenger aircraft, the domestic people widely know that the power of the C919 passenger aircraft is two turbofan 16 engines, which makes everyone very pleased.

Li Tianfeng received a call from Ma Delong, the order for C919 passenger aircraft has approached 500, Li Tianfeng is happy, but also calculating in his heart, how many turbofan 16 engines will be needed.

An aircraft has two engines, and 500 C919s require 1,000 turbofan 16 engines, plus spare engines, the number is at least more than 1,000.

In addition, with the full development of the C919 airliner, the number of orders is afraid that it will surge, just to meet the engine demand of the C919 airliner, at least thousands of turbofan 16 engines must be produced.

Coupled with the needs of the military, if you are lucky enough to get some orders from Airbus, Boeing and other passenger aircraft manufacturing giants, the demand for turbofan 16 engines is very considerable.

In his office, sitting in the comfortable boss's chair, thinking about the prospect of the turbofan 16 engine, Li Tianfeng's heart was full of joy.

…………

Final assembly workshop.

Engine assembly bench. A turbofan engine is being assembled, and this one looks significantly smaller than the turbofan 16 engine, but the engine looks a little similar to the turbofan 16 engine.

This is a turbofan engine of the "TFWS002" type, and the final assembly of the first engine is underway!

Next to the engine. There are many people around from afar, not only the director and deputy workshop director of the assembly workshop, but also several technicians, and even Li Tianfeng, Sun Xiaoping, Zeng Qinghai, etc. are at the assembly site.

The final assembly of this engine, Li Tianfeng has to pay attention, turbofan 16 engine will be delivered to COMAC in batches next year, in Li Tianfeng's view, the problem is not big.

The turbofan engine of the "TFWS002" type is progressing a little slowly, and now the final assembly of the first engine begins. In the future, a series of test tests and verifications will be carried out, as well as test flight verification, and there will be a hurry to apply for design finalization, production licenses, etc.

Several assembly workers assemble the engine, and several technicians provide technical guidance on the side, because it is the first engine, everyone is assembling it for the first time.

After the turbine shaft is installed, an assembler is holding a dial gauge. Checking the runout of the end bore of the turbine shaft.

The turbine shaft is also the central axis of the entire engine. The runout of the inner bore of the end face of the turbine shaft is extremely strict, and the runout is not more than two wires relative to the central axis of the engine.

The dial gauge head pointer is stretched into the inner hole of the turbine shaft, and after the gauge is pressed, the turbine shaft begins to rotate slowly, and with the slow rotation of the turbine shaft, the dial gauge pointer also beats slightly accordingly. After a spin, the assembler's face became a little solemn.

"Old Duan, how's it going?"

"There is a little unqualified, the requirement is to beat two wires, and I checked the table to find that there are three wires. Unqualified. ”

"Let me give it a try." Another assembler next to him, who was a little older and looked more experienced, went into battle himself and inspected it.

Re-press the table, re-check, the inspection results are still the same, or unqualified, and it is also nearly three wires.

Li Tianfeng, who was watching the assembly of this engine next to him, seemed to have seen something abnormal, and immediately took a few steps forward, walked over and asked, "What's the matter?" Having a problem with assembly? ”

"Mr. Li, there is a little problem, the runout of the inner bore of the turbine shaft end face is unqualified, and the design requires two wires, while the actual runout has three wires."

"Oh." Li Tianfeng said: "The runout of the inner bore of the turbine shaft is a very critical assembly technical requirement, which cannot be out of tolerance. ”

After speaking, Li Tianfeng stepped forward and personally inspected it, and after the inspection, Li Tianfeng said: "Disassemble it, reassemble the turbine part, and in addition, before assembling the turbine part, carefully check the runout of the bearing mounting hole of the combustion chamber casing." ”

"Ahh

Several assembly workers were stunned, obviously there was a little bit of reaction, the reason for the unqualified beating has not been analyzed, this is to disassemble the turbine part of the reload, what if the reassembly is still unqualified.

Seeing this, the director of the assembly workshop next to him immediately said: "Demolition, demolition, do it according to Mr. Li's requirements." ”

Several workers finally reacted, remembering that Mr. Li's technical attainments were extremely high among the majority of employees, and several workers nodded and began to disassemble according to what Li Tianfeng said.

Originally, the turbine part was only assembled and the turbine rotor part was installed, and it was relatively quick to disassemble it. It was dismantled quickly.

One end of the turbine shaft is installed in the bearing mounting hole of the combustion chamber casing, and the runout of this bearing hole directly affects the runout of the inner hole of the other end face of the turbine shaft.

Obviously, Li Tianfeng saw the problem at a glance, and the real reason for the unqualified runout of the inner bore of the turbine shaft end face just now may be that the runout of the bearing bore is a little too large.

The turbine rotor was removed, revealing the bearing hole on the combustion chamber casing, and the workers began to check the bearing hole according to Li Tianfeng's requirements.

The runout of this bearing bore is really a little too large, although there is no out-of-tolerance, but it is also on the edge of out-of-tolerance. Several workers couldn't help but glance at each other, and then quietly glanced at Li Tianfeng in the distance, and thought in their hearts, the rumors are really true, Mr. Li is a technical expert, and he can see the problem at once.

The reason was found, and these assembly workers made slight adjustments to the assembly of the combustion chamber casing to ensure that the runout of the bearing hole was within a trace, and then installed the turbine rotor as required, and then checked the inner hole of the turbine shaft end face.

A little beating!

Seeing the results of the examination, several people quietly glanced at each other again, their hearts were full of admiration, if it wasn't for Li Tianfeng's point-to-point pointing out just now, it might take a lot of time just to find the reason, and it might even make people anxious.

Complete the assembly of the combustion chamber part, the assembly of the turbine part, and then start the assembly of the compressor, the turbine part, and finally install the tail spray, install the relevant accessories and electrical components, control system and so on.

Three days later.

The turbofan engine has been assembled and is ready for factory commissioning. Li Tianfeng came again in person, and when he saw that the engine had completed the final assembly, he couldn't help asking, "How is the situation?" Can we start a validation test? ”

The director of the assembly workshop immediately replied in person: "Mr. Li, it has reached the test state, and the factory test can be started." ”

Hearing this, Li Tianfeng nodded happily, this engine, in the assembly process, more or less had some small problems, but the whole process was quite smooth, because it was the first time to assemble, it was completely normal to have such a small problem.

With the assembly of one engine by one, the assembly process will be smoother and smoother, and there will be fewer and fewer problems, and when it comes to small batch production, the whole assembly process will definitely be very smooth, and the assembly quality of the engine will be very stable.

Li Tianfeng said: "This is the first engine of our 'TFWS002' turbofan engine, and we will start testing immediately. ”

The process of the "TFWS002" turbofan engine must be grasped quickly, and Li Tianfeng is naturally very aware of this, and immediately waved his hand to start the first verification test of this engine.

Test work, naturally someone is responsible, if you have time, Li Tianfeng personally go to the test workshop to have a look, for the test run of this engine, Li Tianfeng is full of confidence, thinking that it should be smooth.

………

Capital.

At the invitation of the military, Li Tianfeng participated in a technical review meeting, a technical review meeting on the H-6 long-range bomber.

The H-6 is preparing to modify the turbofan 16 engine of Tianfeng Technology Company, so the H-6 will be transformed and upgraded to a certain extent.

The meeting lasted for two days, and Li Tianfeng attended the meeting, but he spoke relatively little, and his expression was decent, because in Li Tianfeng's view, the transformation and upgrading of the technical plan of the H-6 was not very difficult.

There is no need to change the structure of the aircraft, nor to improve the weapon system, control system, avionics system, but only to make a corresponding improvement on the basis of the engine.

However, although the amount of changes is not large, it is of great significance, and the results are immediate, and the range of the H-6 can be increased by about 50 percent immediately, and the maximum range will be increased from the original 8,000 km to about 12,000 km, which is also the reason why the military is in a hurry to carry out the transformation of the H-6.

On the premise that there is no new long-range bomber, the H-6 is not only the main bomber in the military's current service, but also even assumes the role of a long-range strategic bomber, and its range has been greatly increased, and the combat effectiveness of the H-6 has also been greatly improved.

However, in Li Tianfeng's view, as a military power and an economic power, the military needs a new long-range strategic bomber.

At the end of the meeting, the transformation plan was smooth, Li Tianfeng walked out of the venue, and suddenly heard someone behind him calling himself, Li Tianfeng couldn't help but stop, turned his head and looked back.

………

Today's three watches, the second one is sent! (To be continued......)