Walking into the large conference room provided by the Science and Technology Commission again, I can obviously feel the crowding, which means that the launch of the new push turbofan has attracted a lot of attention this time.

Although there were many people who came to the meeting, most of them were the military, the Science and Technology Commission, the Ministry of Aviation Industry, and even other miscellaneous onlookers. Of course, the people who can sit here are the melon-eating masses who know the truth, and they are all quite qualified.

The two parties participating in the bidding knew what level the other party was early, and the southwest science and industry side because of the step-by-step pre-research of the new push technology, as well as the completion of the finalized core machine, it can be said that all aspects of the foundation is solid, naturally full of confidence in their own plan.

Correspondingly, the Hongqi plant is not without self-confidence, and people have come up with an engine with British origin, although the turbofan 9 is a little backward, but this thing is not without potential for improvement.

Both sides have their own reliance, and each is working hard to win this project, although the relationship between the two units is not bad.

Southwest Science and Industry's turbofan 10 has the help of Hongqi Factory, and Hongqi Factory's turbofan 9 without afterburner, in order to increase the push, help the bombardment oil 6 break through the 100-ton mark, and also seek technical support from Southwest Science and Industry.

It can be said that the Southwest Science and Industry and Hongqi Factory are cooperating and competing at the same time, and this relationship should be the most suitable for the two units, but I don't know how long it can last in the future.

Soon, all the parties attending the meeting sat down separately, and when Director Ding stepped onto the podium, there were no tirades or anything like that.

"Everyone knows the theme of this meeting, and the Science and Technology Commission only hopes that this time it can select an excellent and safe medium-thrust turbofan engine development program, and then ask the army to announce the technical indicators of the new medium-thrust engine."

The so-called army announced technical indicators. It's just a formality, and the one who can participate in the meeting is not familiar with the technical specifications of the engine.

Thus. On the side of the army, it is only: "Regarding the technical indicators of the new medium thrust, it is required that the thrust without afterburner is 5 tons to 5." Between 5 tons. The maximum military thrust is in 8. 5 tons to 9. Between 5 tons, the thrust-to-weight ratio is ......"

After the step-by-step explanation of the requirements was completed, about an hour had passed until the main topic of this time was announced.

"There are two units participating in the bidding for a new generation of push engines, they are the state-owned Chang'an Hongqi Machinery Factory, the state-owned Southwest Aviation Science and Industry United Company, the meeting will choose the best unit to continue the development of the engine, and the following is the first speech by the state-owned Chang'an Hongqi Machinery Factory."

The stage was handed over to the hands of the bidders, and as for the issue of the Hongqi factory taking the lead this time. There is nothing to say about this, and there is no question of the order of the two units in total.

Last time, the Hongqi Factory participated in the engine bidding for the MPC-75 passenger plane, and although it was only a junior brother and did not have the opportunity to fight in person, it can be regarded as having experienced the bidding process, and it is also quite experienced in this military engine bidding.

As soon as it came up, it was the speaker who had been specially packaged, but Yang Hui still understood this person carefully, which was a little familiar. The last Yang Hui worked in the northwest region, and Yang Hui saw this one a lot at that time.

Naturally, this plane still looks so familiar, this is the previous plane responsible for the localization of the turbofan 9 engine, and he is also the chief engineer of the Hongqi Factory: Li Mengzhen.

But according to the situation of the previous one. It doesn't feel right. Li Mengzhen, who was in the previous face, also became the chief engineer of the Hongqi Factory in 96, could it be that this plane was localized ahead of schedule because of the turbofan 9, and the chief engineer of this plane was also ahead of schedule?

Yang Hui's guess was right or wrong. If you want to talk about this deputy chief teacher Meng, he is also very capable. Although the turbofan 9 of this plane was localized ahead of schedule, he failed to become the chief engineer.

But in the end, he still got the position of deputy chief engineer. With good technical capabilities, it has well cooperated with the various nodes of turbofan 9 localization.

At this time, the chief engineer of the Hongqi factory also considered the problem of cultivating a new generation of chief engineers, and this time the new Zhongtui turbofan pushed this out, and it seems that if the Hongqi factory wins the project this time, the chief engineer should be this one.

Seeing that this acquaintance stood up, Yang Hui also sat down, wanting to see what the highlights of the Hongqi Factory's plan were.

Although he is at the level of deputy chief engineer, Deputy Chief Engineer Meng is still relatively simple to wear, and the new Zhongshan suit is also very suitable.

After the projector is turned on, the finished slides are projected, and although there are no various renderings of the future, the general technical route is also expressed in various ways.

"Our plan is to improve from the existing turbofan 9 base, which is the safest plan, Hongqi factory has produced a total of 80 turbofan 9 engines, and has a good understanding of this type of engine."

Hongqi Factory now dares to say this about the improvement of turbofan 9, which is definitely targeted, change the slide, and then turn around to explain the content on the new slide.

"We have conducted in-depth research on turbofan 9, and while completing the development of turbofan 9, we have increased the engine thrust of turbofan 9 to 5 by improving the high-temperature turbine blade material and increasing the total turbine temperature. 86 tons. ”

First of all, the performance data of the turbofan 9 engine produced by Hongqi Factory is introduced, at least the thrust of the current turbofan 9 engine must be able to meet the thrust requirements of the new medium thrust.

But this is not enough, the Hongqi factory is now well aware of the performance of the turbofan 9, how ugly the medium and high altitude performance of this engine is, this is simply ......

Fortunately, the current Hongqi plant also has countermeasures for this, and if you want to improve the high-altitude performance of the turbofan 9, you have to ......

"Of course, in view of the low high-altitude performance of the turbofan 9 engine, we also have a corresponding improvement plan: first, through our cooperation with Rolls-Royce to develop the BR715 engine, we have a plan to optimize the high-altitude performance of the turbofan 9, which Hongqi Factory can do."

Yang Hui heard this, and he had already been more vigilant about the turbofan 9 engine improvement launched by the Hongqi Factory, if this thing can really optimize the high-altitude performance, this is completely a big rival.

Just when Yang Hui was worried about this, Chief Master Meng of the Hongqi Factory had not finished speaking, how could the first two points alone make the Hongqi Factory ambitious.

"The reason why our turbofan 9 is backward in performance is that the high-altitude performance is not good, and the thrust-to-weight ratio and engine size are also big shortcomings, but this is not that it cannot be overcome!"

At this time, Mr. Meng finally came to the spirit, what he just said was something without original spirit, and now the size control and weight control of the turbofan 9 engine is the time for Hongqi Factory to do it himself.

There are other options for weight control, but it's a bit difficult to control the size of the engine.

As the first generation of turbofan engines, the turbofan 9 is huge in size. Its length reaches five meters and its diameter is one meter, which is already the same size as the high-thrust turbofan engine of the same class as the F110, and is used to compare with the medium-thrust engine......

In the face of these huge problems, Hongqi Factory chose to face it calmly, the diameter of the engine must not be improved, but the length must be controlled.

"We plan to reduce the number of fan stages for the turbofan 9 engine by one level, change the original five-stage low-pressure fan to a four-stage low-pressure fan design, and change the high-pressure compressor from the original 12-stage to a 9-stage high-pressure compressor, so as to effectively control the length of the turbofan 9 engine." (To be continued.) )

PS: The last chapter was the leader of the left alliance, I typed fast, I didn't notice, forgive me