The turbofan engine is a new generation of power, compared with the turbojet, an external duct has been added to the outside, which means that under the same fuel consumption, it increases the thrust, which will naturally make the fighter get better performance.

But from another point of view, if an outer duct is added, then this kind of engine will inevitably become thicker.

This is the reason why the F100 engine is thicker than the J79, they are all high-thrust engines, and the combustion chamber is the same, but it will definitely be thicker.

Now, the United States will definitely not design a rear fuselage in order to replace the J79 engine, so how to stuff the J79 into it?

It must be on the outside of J79, wrapping a partition!

Only the most professional aircraft designers will analyze the design clearly, do not change the rear fuselage, wrap a layer of partitions, this partition is also very particular, it must be able to dissipate heat, and it is best to have a circle of pure copper.

How heavy is such a lap? To say less, it has to be tons!

Originally, the engine was a lot heavier, and the separator was added, two or three tons more, and the thrust was reduced again, so at a glance, the performance of this fighter must be an extremely reduced version.

Now, Qin Feng explained these analyses slowly, little by little, and the ideas of his mind gradually became clearer.

Just now, Qin Feng didn't get distracted, he just cared about thinking about the pit attributes of the J79 project, and now, after talking about its shortcomings, Qin Feng's mind suddenly flashed a lot of thoughts.

Mr. Gu said that there will be an inspection project after the year, and it will be to the United States, so needless to say, it must be to inspect the F-16 in the United States!

Their own J-13 project is very similar to the F-16 in appearance, with side wings, belly air intake, conventional layout, etc., which are simply copied from them.

It's a pity that the appearance is the same, but the design ideas are different, and it is necessary to build backward aircraft that do not even have radar, which is not in line with the development of the times for a long time.

Even if the F-16 cannot launch a medium-range Sparrow missile, this fighter has the most advanced avionics equipment, and its pulse Doppler radar can filter out the target in the ground clutter.

What about yourself? Looking up, I can't see far, and when I look down, it's a blur, and I can't do anything.

If this project is really introduced, the most meaningful reference for your own side should be its avionics system, right?

"In this way, this fighter is simply fooling." The expression on General Lin's face became solemn, he knew that the stakes were very high, and if the Americans really deceived themselves like this, it would be really hateful!

"So, does it have any merit?" General Zhang asked.

Merit? Qin Feng thought carefully in his mind and said, "If you talk about its advantages, it should be a turbojet engine, which is suitable for high altitude and high speed." ”

The turbojet engine is relatively thin, and compared to the turbofan engine, the characteristics of high altitude and high speed are better.

Hearing Qin Feng say this, several military bigwigs nodded, yes, this time it was to the point.

Not to mention anything else, as we all know now, the Spey engine has been introduced, after bench testing, installation inspection, it was found that this turbofan engine is really a picture of high-altitude weakness, which seems to be unique to turbofan engines.

If you need high altitude and high speed, then turbojet is obviously more suitable, if you need a large range, need a lower fuel consumption rate, and a larger thrust, then the turbofan engine is king.

Foreign countries have long ceased to pursue high-altitude and high-speed, only domestic countries are still obsessed.

In fact, J79 is suitable for high-altitude and high-speed, which is not bad, but, because of the additional weight, the thrust is still small, so, really soaring up to high speed, it is not necessarily faster than F100, not to mention, F-16 is a fixed pitot air intake, there is no adjustment mechanism at all, it is not prepared for high-altitude and high-speed at all, what is the use of changing a high-altitude and high-speed engine?

Qin Feng almost said everything he had to say, and now, looking at the gloomy faces of the leaders, Qin Feng knew that he had done something big again this time, even more serious than the next MiG-25.

This is related to the development of domestic fighters! Once the superior claps the board, will it be promoted, or will it be wasted? Who knows?

"Nothing else?" General Lin asked.

"If there is a problem, it is that if the Americans are conscientious, the price should be a million dollars lower than the original engine sold to us." Qin Feng racked his brains, and he couldn't think of any other advantages.

What are the advantages of this low-grade machine? It's just a trick that GM was forced to come up with because it wanted to make money.

Because the modification is not large, the F-16-79 is easy to produce with the F16A on the production line, and at the same time there is no need for new equipment, as long as it can fool out buyers, then it will work.

Indeed, many buyers have considered it, but thinking about the performance degradation compared to the original, they all gave up in the end, and the Carter administration then relaxed export restrictions, and some countries were able to buy the standard version of the F16, and then the Reagan administration fully opened the F16 export, and the F-16-79 was therefore unpopular.

After thinking about it, Qin Feng said again: "According to the news in the aviation industry in the past few months, the production line of the J79 engine should have been closed. ”

As soon as Qin Feng said this, the meaning could not be more obvious, they were selling this kind of fighter, and the engine production line was gone, so it must be to dismantle the retired F-4 ghost fighter engine and refurbish it for China.

"Smack!" General Lin's hand slapped heavily on the table: "I know that the Americans are not at ease, hmph, we don't buy this kind of fighter!" ”

General Lin's voice within the Air Force is also very important, and he is naturally reluctant to carry out this project when he says this, and the other party is fooling people.

What Qin Feng said definitely still needs to be verified, but it is true, because the data Qin Feng said is too clear.

"We have to find out about this matter." General Zhang said: "Qin Feng, then you say, if we can buy it, what is more suitable to buy?" ”

If you can buy it, of course, it is the F-15, this is a real heavy air superiority fighter, the sky of the motherland, the guy who needs such a twin-engine high-thrust is definitely not a light fighter like the F-16.

However, the F-16 can only be exported by the United States if it has to be lowered, let alone the F-15.

"General, the last time I went to France, I saw their Phantom 2000." Qin Feng said.

Compared with the United States, France is not a NATO country, and its arms export policy is independent, and one of the disadvantages of French weapons is that the price is too high.

If you can't produce it yourself and buy it on the world arms market, where can you be satisfied.