Soon, the Iranians are still very determined, gritting their teeth and deciding that they must use fly-by-wire flight control, then the follow-up other design requirements in aerodynamics are easy to say a lot, and the follow-up problems seem to have turned to the design of other key subsystems of the aircraft. Pen, fun, pavilion www. biquge。 info

"Well, I think in your remaining requirements, in terms of the airborne radar used in the aircraft, you require local production, which I think is completely impossible, mainly because your electronics industry is too difficult to match, and according to the radar in the requirements, it is almost the 7806 radar used by the JF-17 lightning fighter in terms of technical indicators, and even our Republic itself has just broken through the technology, and it is completely impossible to sell such good things."

Of course, Yang Hui must resolutely oppose some unrealistic ideas demanded by Iran, and dispelling these careful thoughts as soon as possible will be of great benefit to everyone in the follow-up talks.

And the Iranians, after hearing that it was difficult to negotiate in terms of radar technology, still chose to bow their heads in the face of difficulties, because even they themselves did not believe that as long as the mission was listed, the republic would definitely meet these requirements, and the two sides were not close to each other, and the benefits that Iran came up with were not really good, and people would definitely have to take care of it.

Since it can't be done, then take a step back, and the topic quickly turned to another question: "In this case, it is that we have not thought about it before, and the production of airborne radar involves a lot, so we should give up localization, but on the power system of the next aircraft, we Iran must be able to be independent, even if the performance of the aircraft is backward for this reason, it is acceptable, and you can see the information we provide below." ”

Looking at the Iranians looking very serious, it seems that Yang Hui has also been infected, and he really wants to give Iran a power system that they can make in China? This question also seems to be unreliable, even if Iran itself says that the power system is acceptably backward, but the completely independent production of aero engines is like a dream.

But when Yang Hui carefully looked at the power system selection behind him according to what the Iranians said, the whole person felt bad, as uncomfortable as eating shit, this power system was really familiar.

I saw what was clearly written on the document, to the effect that if the power system of the aircraft could be used, it would naturally accept the use of a single medium-thrust turbofan engine, and if not, it would accept the use of two small-thrust military afterburner turbofan engines with an afterburner thrust of about 3 tons.

Even the technical route has been thought of, and the engine that meets this requirement can be improved on the basis of the TFE-731 turbofan engine (turbofan 11) imitated by United Aero Engine, and there have been cases in the world of improving the TFE-731 engine into TFE-1042-7 military afterburner engine, and a usable engine will be obtained according to this way.

At this time, Yang Hui finally thought about why there has always been a strange feeling about Iran's F-5 fighter improvement plan, that is, in any way, the improved F-5 fighter proposed by Iran has a striking similarity of up to 99% with the IDF on the other side of the strait, and even in many respects is exactly the same.

The development of the IDF across the strait was a worldwide reluctance to sell them advanced fighter jets, and the Iranians are now facing almost worldwide sanctions, except that the Republic is willing to open up a little.....

See if this is similar? Don't worry, take a look at the combat positioning of the two aircraft, they also have a certain low-intensity air combat and patrol capabilities, and must have strong anti-ship capabilities against the sea and a certain ability to attack the ground.

There are many other similarities, such as the fact that across the Strait and in Iran, the demand for independent aircraft production is done at great cost, which is really the biggest coincidence of the century.

Looking at the weight requirements of the aircraft itself, it is also a light fighter, the power system can accept a twin-engine small-thrust turbofan, and the same TFE-1042-7 engine used on the IDF across the strait is the one mentioned by the Iranians.

The same combat requirements, the aircraft are positioned as light aircraft, using the same power system, so the final aerodynamic layout is strikingly similar, Iran gave the F-5 after the initial magic change of the aerodynamic shape after Yang Hui saw the three views, the first time I really thought that I saw the IDF flying over.

For the Iranians' plan, Yang Hui's various complaints in his heart at this time were already pale and weak, and the only thing he wanted to say was almost: "Go out, all the way to the east, don't look back, don't hesitate when you see a strait, and after you go over, you can see the brother IDF of the F-5 magic modified fighter that they have been dreaming of." ”

Yang Hui whispered to a few people who accompanied him to negotiate next to him, and the listeners were all like a thunderbolt from the sky, their eyes widened and their faces were full of shock, and then they nodded or slapped their thighs violently, and finally they all turned into a strange smile that Iranians couldn't understand.

"Alright! Now that we probably know the fighter plan you requested, to be honest, we don't have any idea about this project in our hearts, so we decided that AVIC Southwest will not take this project, and you don't need to know the reason. The reason why we can talk to you so much is because we think that there are other people who are suitable for this project in the Republic, maybe you should go to the AVIC Northeast Company, the strength of this company is actually not bad, and there has been an in-depth study of the aerodynamic shape you proposed, so you should go to the imperial capital first to talk to the people who received you before! ”

What Yang Hui said was not empty words, but he clearly remembered that in the J-18 program competition in 89, among all the plans taken up by the five designs, Fengtiansuo, the main fighter design unit of AVIC Northeast, was not an enlarged version of the IDF fighter at that time! Now let them make a model that looks exactly the same as the IDF, and this ability is still there.

Now it's the turn of the Iranians to be completely confused, from the very beginning they came here to feel all kinds of abnormalities, and now what is the situation? It is enough to say that you don't accept the cooperation project you brought, but this is to recommend another company to take over the project, which should be unique in the history of the world's aviation industry!

The confused Iranian cautiously asked: "According to your meaning, let's go to another aircraft manufacturing company in your country called AVIC Northeast, they will be more suitable than you to do this project?" ”

"Exactly! When you get there, you'll be able to understand why I'm saying that, there's the fighter you need! And the engine you are asking for, as far as the current point of view, the company that can come up with a mature 3-ton low-thrust military turbofan engine in the world can only be our AVIC Southwest, if you talk about the aircraft project, our AVIC Southwest will cooperate with the development of the engine for you to use, as for the localization of Iran, this is nothing more than how much money you can pay. ”

In order to come up with a 3-ton military afterburner turbofan engine, the best solution now is to use the general-purpose core machine used in the MS-4 turbofan and MZ-2200 turboshaft engines that have already been finalized, and the development work can be completed in about three to four years.

As for the technical route of improving TFE-1042-7 on the basis of turbofan 11, that guy's changes are too big, and even the design of the core machine has been moved, and the final engine performance is really not good, and it is not at all simple and real to take the core engine of the MS-4 engine. (To be continued.) )