When the third chief engineer and Yang Hui met again, it was probably the third day that the company decided to independently invest in the development of the light four project, and the four of them discussed in detail the feasibility of AVIC Southwest independently raising funds to develop the light four project. Pen, fun, pavilion www. biquge。 info

The results obtained show that the engine of the light four can directly use the 17-ton small bypass ratio high-thrust turbofan engine developed for the heavy four, and the radar will also adopt the phased array radar design above the heavy four, the difference is that the caliber and weight of the radar will be reduced by reducing the T/R component, so as to adapt to the physique of the light four.

As for the avionics system, there is really no way to do this, the difference between the cockpit size of the heavy aircraft and the light aircraft is too large, so there will be a large gap between the two aircraft in the avionics design, but according to the plan, the avionics system of the light four will be directly carried to develop an improved version of the jewel column avionics system for the J-18.

After all, the cockpit of the J-18 can be regarded as about the same size in terms of space compared to the light four, and the use of the more mature gem pillar avionics system on the J-18 for the fourth-generation aircraft can also be regarded as an early mainstream configuration, at least it can reach the level of the F-22, and it is quite good that a light four can do this.

Moreover, the use of the avionics system developed for the J-18 also means that the new light four will have excellent multi-purpose combat capabilities, which is destined to be sold to the outside world for the fourth-generation aircraft, which is definitely a pretty good export advantage, plus the avionics system is more mature and does not need to be developed from scratch, and the natural cost will not remain high.

In the manufacture of modern fighter jets, the reason why the price of the third-generation aircraft has doubled or even more than the second-generation aircraft, especially in the era of typhoons and Rafale, the price of that aircraft is directly as high as hundreds of millions of dollars, which is simply sensational, and the reason why the famous F-35 cost has repeatedly exceeded the early estimates, it is also because the F-35's avionics are too high-end, which directly accounts for half of the aircraft cost, so it is no wonder that the price cannot be controlled.

Well, now it's okay, control the avionics of the light four at the avionics level of the Typhoon, the late J-18 type, or the F-22, which is definitely enough.

Under the circumstance that the republic will definitely develop the heavy four first, the cost of the light four must not be too high, and this must be guaranteed. As for foreign sales, it seems that countries that are willing to purchase fighter jets from the Republic can accept customers with a unit price of 150 million or more for fighter jets, but it seems that there is really no one.

Of course, if the light four can be finalized and sold internationally before 2010, then the princes of the Middle East may also purchase some light four because of their good relationship with the Republic in this plane. Lan sells the F-35, then our Republic will take over, if the princes are absolutely not high-end avionics, then just take the money to change it!

Therefore, the general situation of the light four is also out, the standard fourth-generation 4S performance, single large push, small-caliber phased array radar, enough gem pillar avionics system, fly-by-wire flight control design, such a scheme obviously will not make the cost of the aircraft too amazing, probably the cost level of Shuangfeng, or higher is not much higher!

At that time, the light four plan will start to be established at the same time as the heavy four from around 96, then it will be found that the light four of the republic will begin to develop together with the F-35 fertilizer electricity, and when I think of the F-35 that was miserable by the Marine Corps and NATO allies in the last face, compared with the republic's light four plan that was accurately positioned from the beginning, there is a very high possibility that it will be finalized and put into service first, and at that time, it will look at the F-35 member countries crying!

The general technical plan of the light four has been decided early on, but this time because the head office and Hongdu have to invest in the development, so it is natural to control some costs more than before, so it can be regarded as making some compromises appropriately, but it happens that these compromises seem to be more balanced in all aspects.

......

At this time, several seats have been added to the conference room, at least this kind of big project must require the wisdom of all the fighter chief engineers of the head office, Chief Sun, Chief Wu and the chief engineer of the L-8 trainer aircraft in Hongdu, everyone is doing it together Around this small round table, the curtains in the room have been drawn, and only the image projected by the digital projector on the large screen can be seen in the dim conference room.

An old-fashioned PC computer was placed aside, and the constantly flashing computer screen displayed a relatively friendly graphics operating system, and when everyone arrived, the young assistant brought by Chief Lu directly clicked on the first picture and confirmed that it was projected onto the screen.

When the image on the big screen changed, almost everyone saw the information displayed on the screen for the first time, the straight and angled design of the aircraft, the beautiful DSI air intake, the camber double vertical tail and various other details, which are undoubtedly reminiscent of the legendary fourth-generation aircraft.

In the current situation, the only thing that is not clear about the theme of this meeting is probably only Chief Engineer Wu and Chief Master Sun of J-18, who are in charge of the lightning fighter project, and it is no problem to say that they do not know that the company has secretly carried out the fourth-generation aircraft project, but this does not mean that they have not seen the spy photos of the F-22 fighter jet that the United States has now put into intense testing, and after a simple comparison in their hearts.

"I... I... The company is going to carry out the development and demonstration of the fourth-generation aircraft, Mr. Yang, is this true? ”

Since he asked himself here, Yang Hui nodded affirmatively at Chief Wu's question, and the original intention of calling them here at this time was to let them participate in this exchange and demonstration meeting, especially in the current situation, as a fourth-generation aircraft project at AVIC Southwest's own risk, it is necessary to be more cautious to seek everyone's opinions.

"That's right, the company did carry out the early development and demonstration of the fourth-generation aircraft, and now the company's plan is that no matter what kind of heavy fourth-generation aircraft the army chooses, we must develop a light fourth-generation aircraft by ourselves, and what we see now is the aerodynamic design of the light fourth-generation aircraft that the chief engineer of Hongdulu spent two years researching and designing, and now they will talk about their opinions on this plan!"

When it came to allowing everyone to express their opinions, the first thing that several fighter commanders at this time were curious about was why the plan brought by Chief Lu this time was unconventional and designed the air intake to the top of the wing.

Although it is also in the air intake on both sides, designing the air intake to the top of the wing will be very helpful to the stealth index of the aircraft, but in terms of this air inlet layout scheme, there will obviously be a lot of inappropriateness!

That's right, although the design brought by Chief Lu this time is a conventional aerodynamic layout, this "conventional" is only a conventional aerodynamic relative to the wing layout, and other natural unconventionalities; The air intake is placed above the wing.

And this design is definitely rare in fighter jets, but it coincides with the design ideas of the air intakes of the F-117, B-2, and a large number of stealth UAVs. (To be continued.) )