"Of course, we know that the eddy currents generated by the edge strip wing will break when they flow through the rear surface of the wing, creating a moment nonlinear problem, which will eventually lead to the difficulty of aircraft pitch trim, but now the international fly-by-wire flight controller is used to overcome these problems, and this problem does not need to be solved."

Brown was surprised at the same time as he explained, he had learned about the strength of this company before he came, and he had vaguely stepped into the threshold of fly-by-wire flight control with half a leg, didn't he know the role of fly-by-wire flight control?

Liu Jun and Yang Hui on the side looked at each other, isn't this the role of side plate technology, it should be that Liu Jun did not take into account the overall design of the aircraft during the test, but only considered the side wing itself, and found the problem of the side strip wing, and there was no way to solve it.

Liu Jun also figured out what was going on at this time, and was looking excited, figuring out the cause of the problem, Liu Jun was already silently thinking about the combination of side plates and large side strip wings in his heart, maybe this will be a new breakthrough.

The cause of the problem was found out, and he no longer dwelled on the technical shortcomings of the large side strip wing, and now what interested Yang Hui was the construction of the technical verification machine that Brown said.

It is really necessary to have a technical demonstrator, especially when it has never been used before and has a great impact on the new aircraft, so it is most reliable to build a demonstrator and collect data on the large-sided wing technology in actual test flights.

As for the fly-by-wire flight control problem mentioned by Brown, the base can be regarded as having touched the barrier, if it only controls the pitching torque of the aircraft, it only needs single-axis fly-by-wire control, and with the base's current single-axis three-redundancy analog fly-by-wire stabilization technology, it can also be barely competent.

"It seems that Northrop has also carried out the technical exploration of the large side strip wing, and is it still satisfied with our technical capabilities?"

If you are not satisfied with this, you can only say that Northrop's technology is at the level of Zenith technology. In terms of the Big Strip Wing alone, the base and Northrop are already on the same level. And when both parties are at the same technical level, there can be equal cooperation.

Brown is not lying: "As for your technical level, I already know that in terms of big side strip wings, you are indeed at the same level as Northrop. However, it is necessary to verify the large edge strip wing technology. You also need to overcome fly-by-wire flight control technology, and in terms of fly-by-wire flight control, your current technology is still very rough. ”

If the edge wing technology is equaled, then we must come up with some other technologies, anyway, we have to occupy a dominant position in technology, otherwise where will the face of the US imperialism go? And the level of fly-by-wire flight control of the Jianjiao 7A, Northrop already has a general understanding.

The simulated fly-by-wire stabilization technology on Jianjiao VII is the most rudimentary and crudest fly-by-wire flight control technology. It is almost conservative in the compilation of control rates, and it can no longer be conservative. Although it meets the requirements of stabilization, it does not give full play to the full capacity of the body, which is too backward in Northrop's opinion.

"Although the analog fly-by-wire stabilization technology is also fly-by-wire technology, it is obviously not enough to give full play to the advantages of the large side strip wing, so in this verification of the fly-by-wire flight control, you must abandon this set of technology and write the flight control law from scratch."

Heard that the flight control law was to be rewritten. Yang Hui was happy from the bottom of his heart to have Northrop's help. It must be simple to write a complete flight control law, but Northrop's fly-by-wire flight controller has also reached the highest point of fly-by-wire flight control: three-axis digital fly-by-wire.

Compared with others, the single-axis analog fly-by-wire increase of Jianjiao 7A is the difference between QQ and Audi, this is the background, Americans have been studying this thing since the sixties, and the accumulation of more than 20 years is not for fun.

"That's for sure, as long as the new aircraft is needed. We must break this level, I believe that with the help of Northrop peers, we can quickly write a new Fetion control rate, directly into the three-axis digital telex height. ”

It's a good idea, but how could the Americans hand over the fly-by-wire flight control technology to the base. This thing is a secret that must not be leaked, the US Department of Defense personally issued a gag order, and Northrop dared to mess around?

After listening to Yang Hui's words, although Brown could not speak Chinese, his body language was common all over the world, and he immediately shook his head like a rattle.

"No, this thing must not have a technical exchange with you, we can at most package the programmed flight control system, and bring it from the United States as a whole to be installed on the demonstrator for use, I don't know anything about the fly-by-wire flight controller."

Hearing this, Yang Hui couldn't hide the loss in his heart, he thought that he could take this opportunity to learn some fly-by-wire flight control technology, but now it seems that it is really no fun.

Think about the Swedish JAS39 plane, the fly-by-wire flight control was learned from the Americans, but in the end it still didn't understand, and it crashed and rolled over during the test flight and landing, which was called a miserable. It is really possible for the same European countries to be so tightly guarded by technology, and now they have to learn from Northrop.

It seems that only by oneself can be conquered slowly, the military technology of the republic is all made in the blockade, and the fly-by-wire flight control is just one of them.

"Since this is the case, then we are thinking about it, and the construction of the technical verification machine needs to be coordinated by many parties, and I am not legally required to do it alone."

A fair and honest reason, first of all, to avoid the question of whether to use the Northrop flight control system, we must be cautious in the fly-by-wire flight control, we must be self-reliant when we have the opportunity, Northrop does not provide technical assistance, then think of other ways, and must not give up food because of choking.

Brown guessed a little bit of Yang Hui's plan in his heart, but he didn't have any opinions, even if he wanted to help, Brown couldn't do anything, the team brought by Brown were all pneumatic engineers, and they didn't know much about fly-by-wire flight control.

After some hesitation, Brown decided to report the news to Northrop's headquarters, and the situation was far beyond Northrop's expectations. The progress of edge wing technology is too fast, and Northrop needs to give a corresponding schedule, and the fly-by-wire flight controller must also make plans in advance.

"I know your concerns, and I also understand your determination to master fly-by-wire flight control, but what I want to say is: with your current software and hardware capabilities, you do not have the foundation to develop digital fly-by-wire flight control, and without a high-performance airborne computer, you want to develop a digital flight controller, which is absolutely impossible."

Brown's words are very direct, Yang Hui is the same as other people standing here, his heart is quite aggrieved, the country's current situation is indeed too different from the advanced level of foreign countries, and the research and development of digital fly-by-wire flight control is really powerless, which is like building a skyscraper without a foundation.

Despite this, Yang Hui still has to think of another way, maybe there are other ways to go

Yang Hui, who was full of congestion, turned around like a machine, pacing out step by step, the fly-by-wire flight control seemed to have become Yang Hui's heart disease, if he couldn't find a way to come up with the supporting electronic equipment, the digital fly-by-wire flight control was impossible.

The use of side plate technology on the new twin-engine multi-purpose aircraft, Yang Hui also did not think about it. But the side plate technology is not perfect, there are many problems, the installation of side plates not only increases the radar reflection area, but even Yang Hui is ready to use to increase the range of the conformal fuel tank has no place to place, such a shortcut is worth the loss, Yang Hui ruthlessly excluded.

The side panels with enlarged side strip wings can only be used for the ultimate magic model of the J-7, this aircraft market is positioned for use by small countries, there is no need for a large range, let alone stealth, there is no need at all.

Is there really no way but to use the fly-by-wire flight control system provided by Northrop?

Take your plane to Northrop for a test flight, see the plane clearly, and then let Northrop write the flight control program, what is the difference between this and the previous life Fengtian flew the Jian-8 to the United States, so that the Americans could see it inside and out. (To be continued......)