The military-industrial scientific research system of the academic master.

Since we had to work the next day, the reception banquet did not last until too late, and we drank very restrainedly.

Most people still maintained a very clear consciousness when the show ended, such as Sun Huizhong, deputy chief designer of the 648 Institute, who flew from Zhucheng to Chengcheng just yesterday afternoon.

He didn't speak the whole time just now, just quietly listening to Chang Haonan's explanations to other people's questions.

Although he had heard about this young genius's deeds from many channels, Sun Huizhong felt that he still had to see it with his own eyes.

So now, the only chief engineer of the 648 Institute only has admiration in his heart.

"Regular worker!"

After leaving the guest house, Sun Huizhong called Chang Haonan from behind and followed him quickly:

Chang Haonan turned around and saw a man with half-white hair standing behind him.

"May I ask you are……"

Although it sounds like he has done a lot, it has only been half a year since he traveled through time, and he didn't have time to interact with too many people.

As an ordinary military engineer in his previous life, he also had limited connections, so except for a few well-known bosses, most of the faces were unfamiliar.

"Sun Huizhong, from City Building 648."

The two shook hands under the dim streetlight.

After taking a closer look, Chang Haonan discovered that the other person did not seem to be particularly old. He was probably in his early thirties. The reason why he grew old early was probably due to congenital reasons or too much pressure.

"Chang Gong, I would like to ask some more questions related to hair matching."

After all, it was already very late, and Sun Huizhong lived in the guest house and was not going in the same direction as the dormitory area, so he didn't make any detours and directly explained his purpose.

Chang Haonan would naturally not refuse this kind of thing:

"Please say."

"What we want to do is develop a two-seat aircraft based on the J-7F."

Sun Huizhong does not shy away from the idea of ​​borrowing ideas from his brother units. After all, the design team of Institute 648 only has a three-digit number of people, and its experience and level are indescribable. In this case, there is no shame in choosing to copy assignments:

"But I heard from comrades here in Rongcheng that the J-7F's air inlet and front fuselage are integrated designs completed by you. Modifications to the fuselage will seriously affect the air intake efficiency, so I would like to ask, what do you think? How feasible is this plan?”

"It is indeed the case. The high air intake efficiency and stability of the J-7F are based on the primary compression of the incoming flow by the nose part. If you want to convert it to a two-seater, you will inevitably have to perform some modifications to the front fuselage. A major change would almost require overturning the entire design.”

Converting a single-seater to a two-seater may seem simple, but the operation requires a lot of work.

For some relatively small aircraft, one more pilot will have a significant impact, and the more sophisticated the aircraft's aerodynamic design, the smaller the operating space left for such changes.

The J-7F occupied both sides, which was particularly troublesome.

So after a little thought, Chang Haonan quickly gave his opinion, even though it was a basin of cold water:

"When I designed this model, I just wanted to give the J-7 a true beyond-visual-range combat capability. I didn't think about letting it take on more complex functions, so I didn't leave much margin. If it were changed to a two-seater ...I personally am not optimistic about it.”

At that time, he had just traveled through time, and he just wanted to quickly create a short and quick project to attract the teacher's attention, so that he could quickly participate in a specific model project.

In fact, Chang Haonan still hasn't figured out how he crossed the level of Professor Liu Hongbo and directly attracted Du Yishan's attention.

All in all, the final result was much better than expected.

"So that's it..."

Sun Huizhong, who was standing opposite, lowered his head slightly and showed a somewhat regretful expression:

"We originally planned to further improve the J-7, and are currently doing pre-research work on wing selection and air inlet matching. After coming into contact with the J-7F project, we originally thought we could have a better reference. Unfortunately, …”

When the other party said this, Chang Haonan suddenly remembered the conversation he had with the two pilots of the 8th Hainan Airlines Regiment at the J-25C delivery ceremony.

They said that the army currently lacks a useful advanced training aircraft.

To solve this problem, designing a new advanced trainer aircraft from scratch is of course the best way, but currently there is no such solution in terms of funding or technology.

Among other things, two small-thrust or one medium-thrust turbofan engines cannot be produced.

Besides, we don’t have that much money right now.

However, it is still feasible to use the redundant digital fly-by-wire technology of the J-8IIACT, combined with the medium-thrust, excellent-performance turbojet 14, to develop a model based on the J-7.

The final product of this idea in later generations was Coach 9, which happened to be the product of 648 Institute.

And Chang Haonan is fully capable of making it born in advance, and...

Become more perfect!

So he changed the subject and said to Sun Huizhong, who was already preparing to say goodbye:

"Since you have such an idea, you might as well be more bold."

After hearing these words, the latter's eyes suddenly lit up, and he raised his head and looked at Chang Haonan:

"You also think we need a new advanced trainer aircraft?"

Although the plan based on the J-7F technology has been rejected, Sun Huizhong is very happy to get recognition of the idea of ​​​​this training aircraft.

You must know that the conversion rate of pre-research results is actually very low. Sometimes out of 10 pre-research plans, only two or three will eventually become formal projects that can be carried out, and even fewer may eventually achieve positive results.

The two pre-research reports they submitted before were rejected due to lack of depth.

Therefore, Institute 648 also has internal concerns about the plan for this new advanced trainer aircraft——

Bite the bullet and continue will require more investment, and no one can guarantee that the army will definitely want it. This is a risk for them with a small family and a small business.

Even Sun Huizhong, who originally proposed the idea, didn't have much confidence.

You must know that although he holds the title of deputy chief designer of the 648 Institute, this is entirely because there is really no talent in the institute, so he is replaced by a person who is less than 30 years old and has not led any model design.

If you are young and have no successful experience, you will naturally lack confidence.

So when he heard Chang Haonan express his support, Sun Huizhong was quite excited.

Although the former is younger, judging from what happened at the dinner just now, he definitely has real talent and knowledge, and he played a very important role in the 83rd Project. His statement is definitely weighty.

"Of course, JJ7 was created by you, and you should be very aware of the flaws."

Chang Haonan nodded and did not show mercy just because the person in front of him came from No. 648:

"The low-speed performance and rear-seat visibility are so poor that instructors even need to make their own periscopes to observe the situation ahead during takeoff and landing, and the potential is not enough. It is barely enough to train J-7 and old J-8 pilots, but our Air Force is making great strides." We have entered the third-generation machine era, so this model will definitely not be able to play a leading role for a long time."