Even if you don't ask about it, Yang Hui will talk about it right away.

"Director Yang's opinion on our project is a little different from ours, and he means that not only can we not hide it from the Ministry of Aviation Industry now, but we should immediately notify the relevant ministries and commissions, and finally poke this matter to the top. Only in this way can we ensure that we will not be secretly cut off. ”

As soon as this statement came out, it was equivalent to completely disrupting everyone's assumptions, but if you think about this plan carefully, you will find that this plan is the best choice. This should be the best possible situation at the moment.

Chief Engineer Yu roughly figured out the twists and turns of Director Yang's idea, weighed it and finally said: "This method is indeed the most beneficial to us at present." As long as the possibility of covert truncation is eliminated, then we will be a big victory. ”

Then Yang Hui said a few advantages mentioned by the old man in the family, and then increased everyone's understanding and confidence in this solution.

After a period of silence, Director Bai finally spoke first: "I think this method is more reliable than we originally thought, everyone votes and sees which plan is implemented." ”

There was no suspense about the result of the vote, and naturally everyone agreed with the second much-hyped plan.

Seeing that everyone agrees with this new plan, let's discuss what to do in the future according to this plan, and go ahead prepared.

"Well, this new plan requires everyone to go to the relevant ministries and commissions tomorrow to make notices, then we will assign everyone to go to that ministry. Let me first express my determination, and the Ministry of Aviation Industry will inform me that I will see what kind of grimace this bureaucrat will have. ”

There are not many aviation-related ministries and commissions, that is, a few, and there are still people who do not have tasks after they are assigned. This includes Chief Engineer Yu and Yang Hui.

Chief Engineer Yu thought about it and felt that time was pressing, and he couldn't waste manpower: "In this way, if this project is to be reported, then we will definitely have to come up with the initial scheme design of the trainer soon, and now we will do the initial plan for the rest of us." ”

Now the initial design can't be put down here, it is necessary to keep up with the progress of the project as soon as possible, and in the end, it depends on whether the design plan is reliable.

"That's right, you have a rough design plan, right?"

Knowing that Director Bai really asked knowingly, but Chief Master Yu didn't say much, just glanced at Yang Hui and then said: "This plan was submitted to me a few months ago, and at that time, we had no conditions and could only let this plan fall into ashes, but if we want to be different, if we have money, it would be our mistake to let it continue to fall into ashes." ”

As expected, this is the plan proposed by Yang Hui last time. Then let's see what the mystery of this plan is, and why it made Lao Yu, who was the chief engineer at the time, so shocked.

Without further questioning, Director Bai agreed that the rest of the people would obey the dispatch and follow Chief Master Yu to make the initial plan.

"Since Lao Yudu said that he needs to make a plan now, it seems that it is not too late, everyone who has nothing to do tomorrow will follow along to make a plan."

"Okay, let's go down and have a look, it seems that there is still food at this time, let's go."

The food eaten a few hours ago has been almost digested, Yang Hui also went to eat something, although there is no need to do other things at night, but lying down must have a lot of pneumatic design plans to consider, I don't want to be able to sleep in the middle of the night.

I got up early in the morning and got ready to start working on my own projects, and those who had the task of running the department got up earlier, and now that Director Bai has left, I hope those bureaucrats can still have a little discipline.

The people who should go to the running department have left, and the remaining five people have gathered in the chief master's room again, and now they are just discussing it verbally, and everyone will listen to the plan, if there is no major problem, Yu will find a big place to prepare to draw something on paper.

Closing the door, making sure it was safe, and getting ready for the meeting again, there were a lot fewer people than yesterday, and it felt much easier to sit down.

Chief Engineer Yu first introduced the general positioning of the training aircraft.

"The requirements of this training aircraft will be quite a big improvement compared with the Jianjiao VII we are doing now, one is to be able to train some of the third-generation and pilot training subjects, and the other is that the cockpit and environmental control system required by the Saudi side are in line with Western standards, and now let's talk about this training part of the third-generation aircraft flight subjects."

Yang Hui was in contact with Pakistan in person at that time, so naturally he had a great say.

"In terms of training third-generation pilots, the Pakistani side hopes to achieve 50 percent of the basic training subjects on the new trainer aircraft."

Is it easy to train 50% of third-generation aircraft? As a typical second-generation aircraft, the J-7 needs to be modified in order to simulate part of the flight performance of the third-generation aircraft in order to realize the training subjects of the third-generation aircraft.

Chief Engineer Yu is an aircraft designer who knows the Jianjiao VII well, and what is the current situation of the Jianjiao VII, it is naturally Menqing.

"The current aerodynamic layout of our Jianjiao-7 obviously does not meet these requirements, and the nose air intake cannot imitate the flight characteristics of the belly and both sides of the aircraft; A simple thin-wing delta wing cannot fly as well as the third-generation aircraft's excellent low-altitude performance, and these problems require us to redesign this current trainer aircraft. ”

Hearing the expressions of everyone who re-pushed to the design was not an objection to this bold plan, but a feeling of eagerness. The current Jianjiao Seven still can't jump out of the framework of the Jianqi, if it is redesigned according to the current statement, then there can be a new design in many places.

Hearing this, the people who are eager to try it can't be calm, and said excitedly.

"This redesign is as it should be, otherwise how can such a maximum of $600 million in funds be spent, and now it is an opportunity to practice well, and at the same time upgrade the technical capabilities of the entire base, why not."

"Yes, why not, we have to redesign, only in this way can we design a good trainer that meets the needs."

All agree on the redesign of this trainer aircraft, that's good. Chief Engineer Yu didn't want to say anything, and then talked about how this redesign should be appropriate.

"First of all, the current nose air intake must be changed, not only that, I'm afraid that the entire nose part will have to do major surgery, the air intake will be changed to two sides of the air intake, the head of the aircraft can be vacated to install a radar device, the cockpit can be raised, and the pilot's field of vision must be expanded, especially the instructor seat in the back seat must be raised higher than the front seat, and now the Jianjiao 7 is quite inappropriate in this regard."

Speaking of the modification of the 1 air intake, now we have to talk about the wing selection, there are many kinds of airfoils to achieve better low-altitude performance, but the most suitable airfoil is only one.

"If we want to achieve good low-altitude performance, we must work on the wing, first of all, the thickness of the wing can be increased appropriately, but this is far from enough, in order to achieve the target we have to change the airfoil. There are a number of options that can achieve this, but I think the use of a double delta wing on top of a delta wing is the one with the least changes. ”

The double delta wing was a fairly popular design in the seventies and eighties, and was used in almost many classic aircraft.

When the Rafale fighter was proposed in the early days, it had a double delta wing design, and Yugoslavia's new fighter plan also used a double delta wing layout, but in the end, it was changed to a canard layout, or the entire project was directly discontinued.

The only fighters that actually built with double delta wings were the Saab 35 Dragon fighter of Saab Company, and the Jian-7E follow-up fighter of Chengfei Company of the Republic of China.

Now the double delta wing layout proposed by Chief Engineer Yu was the most fanatical time in the world in 83 years, and the adoption of double delta wings naturally had no objection. And from the perspective of technical inheritance, this is the most suitable and the simplest.

After saying this, the modification of the aerodynamics is almost the same, probably talking about the aerodynamic shape of the Shanying training aircraft drawn by Yang Hui last time, which is the affirmation of the aerodynamic layout proposed by Yang Hui by Chief Engineer Yu.

"Well, I've talked about the modification of the aerodynamic shape here, and I don't think it's better to make big changes in order to reduce the risk of R&D. If you have any different ideas, please refer to them. ”

After Chief Master Yu finished speaking, his thoughts naturally have their own ideas, and this time there are not only design institutes but also manufacturing factories who come to the imperial capital.

The director of the Shuangyang plant put forward a different opinion: "Chief Engineer Yu's change is too big if he adopts air intake on both sides, can we use the method of jaw air intake, so that the modification of the aircraft will be simpler." ”