Airplane Building.

"This kind of three-brother-in-law engine can be completely stuffed into the engine compartment of our J-11 fighter!" Lu Lao took the details of the third uncle's engine and said with great interest: "It's just that the length is a little short, but we can change the installation position and change the nozzle!" ”

If you want to change the size of different engines, you must first be close in size.

The Tomcat fighter uses the TF30 engine, which is characterized by a long length of 6.139 meters, while the replacement of the third aunt engine is only 4.99 meters long, that is, five meters, a difference of more than one meter, how to solve it?

This is not difficult to solve, in the case of the same shape of the aircraft, as long as the engine installation position is moved back a little, and the tail nozzle is lengthened.

The Yankees have also encountered this kind of problem, when they use the F110 engine to modify the F-14D, they will find that this engine is even more unsuitable, after all, the length of the F110-GE-100 is only 4.622 meters.

What to do?

Changing the shape of the nozzle, doing other work, the length of the F110-GE-400 was stiffly pulled to 5.893 meters.

A long engine can be a hassle to cram into a short engine compartment, but conversely, a short engine is crammed into a long engine compartment and it is much easier to change.

In addition to the length, it is a matter of diameter.

"As for the thickness, the diameter of the TF30 engine is 1.24 meters, and the diameter of the largest air intake part of the third aunt is 1.28 meters, a small difference, we just need to modify the bracket."

Length and diameter can be solved, and then there is the weight problem.

"The original TF30 engine has a net weight of 1807 kilograms, and the current third aunt has a net weight of 1570 kilograms, so that each engine will save 237 kilograms of weight, and two can save half a ton of weight, which can make the weight of the J-11 fighter we produce lighter."

The Tomcat fighter has a powerful titanium alloy wing box, which causes it to weigh too much, and although it has the advantage of a variable swept wing, the actual maneuverability is still not comparable to that of fighters such as the Su-27 that is fused with a wing body.

Now, it can save half a ton of weight for this aircraft, which is a great contribution to the improvement of aircraft performance.

However, the big guys are not too optimistic.

"The tail saves weight, what about the front? If you can't save weight at the same time, then I'm afraid you will have to add counterweights! ”

The change of weight is not so simple, changing the weight somewhere, it will cause the center of gravity of the whole aircraft to change, but the shape of the aircraft has not changed, which means that the lift center has not changed, for the static stability aircraft, the lift center needs to be behind the center of gravity, so that it is convenient to operate the balance of the aircraft through the rudder surface, but at the same time, it also means that the aircraft is not flexible.

The advanced third-generation aircraft are statically unstable design, relaxed static stability, so that the aircraft is flexible in operation, but the operation is not easy, hydraulic control is impossible, and can only be transmitted by wire.

Surveying and mapping imitation products have not been calculated from scratch, so this kind of product is not easy to change, and it will move the whole body as soon as it is triggered.

The easiest way to do this is to add counterweights.

The improvement of the J-7 is like this, using Marconi's avionics, the nose is lighter, in order to ensure that the center of gravity remains unchanged, the cement counterweight is increased on the nose, and the avionics are lighter, the cement counterweight is increased.

In the later stage, the tail was made of composite materials, intending to reduce the weight of the tail and balance the nose, but there was a problem with the composite materials, so we had to continue to use counterweights as before.

What about J-11? What will be used to solve this problem?

"At present, we are working on a fly-by-wire operating system, and when the fly-by-wire operating system matures, we will be able to solve this problem." Lu Lao said.

When Lu Lao was working on the strong six, he planned to use the fly-by-wire operating system, and he also did a lot of research work at that time, and now he has made this upgraded version of the double-engine strong six, of course, the fly-by-wire operating system can also be transplanted.

The problem of changing the center of gravity and destroying the static balance can be solved by the fly-by-wire operating system, and even the static stability can be relaxed, so that this fighter has more powerful maneuverability.

"Okay, Lao Lu, your 320 factory really dares to think and dare to do!" Lin Lao was very satisfied.

If this project is handed over to the Northern Institute, with their cautious and cautious personality, they will never dare to play like this, what if they mess up? They demand stability, blindly seeking stability!

It took so long to change the nose air intake to both sides, and then look at the 320 factory, from the J-6 with the nose intake to the strong five on both sides, it didn't take long! And the effect is very good!

"However, the maturity of this fly-by-wire operating system is not easy, a year and a half is fast enough, and it may even take three or five years!" Some people present expressed their worries that the Air Force is in urgent need of modern fighters, and it will not be able to wait that long for the time being!

"If we use it now, then we don't need to add counterweights, just adjust the fuel consumption order of the fuselage fuel tank, so that the fuel tank in the back is more than the fuel in the front."

Everyone's eyes lit up.

What counterweights to add! Balance it with fuel! Of course, this defect is that even if the plane lands, it must leave half a ton of fuel, otherwise the empty plane is still unbalanced, but for the sake of flight safety, what brave pilot dares to completely burn the oil of the plane and come back? This is also only temporary.

"At the same time, our technicians are constantly improving the aircraft's avionics." Lu Lao continued: "The weight of the front nose will also slowly decrease. ”

Although the Tomcat did not use the one-ton radar equipment of the Su-27, its AWG-9 radar is still only the technology of the sixties and seventies in the United States, and a large number of discrete components are used on it, and now it has obtained the advanced APG-66 radar, and it is completely possible to use the technology of the above radar to digitally transform the AWG-9 radar, this improved radar will be more advanced and lighter, plus the weight of other avionics equipment, it can completely reduce the weight of the aircraft!

"That's right, Lao Song is developing a glass cockpit over there, I heard that it has been almost done, if you replace the glass cockpit, the weight of the cockpit instrument can also be reduced by one or two hundred kilograms!"

Now all the domestic fighters are the style of the watch shop, except for the J-10 under development, this kind of aircraft has been aimed at the most advanced level in the world from the beginning, with a tall layout of one flat and three down, this cockpit is not only simple, but also saves a lot of weight because of the elimination of a large number of instruments.

"Well, since that's the case, then this project to change the engine must also be hurried." Lin Lao said: "How much money do you need, just report it, let's try to meet it!" ”

"No, we have money."

Speaking of this, Lu Lao's face was full of pride.

Factory 320 is not bad for money, the J-11 they produce is not only for their own use, but also for export, and with their help, the country of peace has restored the establishment of forty Tomcat fighters, and the fleet is still expanding, and in the end, maybe it can be restored to the scale of sixty or seventy aircraft! If you purchase brand new ones from the East, two or three hundred are possible!

Their factory relies on this business, and it is also well-funded, and there is no need for appropriation from the superiors at all, besides, now Lin Lao said it is good, give them allocation, and when it is really time to give money, it should be painful.

"It's good to have money!" Lin Lao sighed.

"Of course, thanks to Mr. Qin!" Lu Lao also let out a sigh of emotion.

If there is no Qin Feng, then their 320 factory can only sell Qiangliu now, that kind of old aircraft has been completely outdated, and it will be eliminated one day, now, with this J-11, they have regained their vitality and vitality, and the future is unlimited!

"By the way, what about Mr. Qin? Why hasn't it come yet? ”

"I'm coming!" A voice sounded outside: "Really, is this going to exhaust me?" I haven't caught my breath yet! ”

"It's been six hours since you've been back, and you haven't caught your breath yet?"

"Of course, just solved the problem of foreigners, with their help in the activities, it is estimated that Grumman will soon be able to relax, even if the cooperation cannot be carried out, at least we have to return our plane."

"Xiao Feng, this matter is thanks to you! Those who are in the north must also be grateful to you. ”

"Hmph, it's good if they don't scold me. By the way, let's get down to business, I'm busy. ”

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While speaking, Qin Feng had already walked into the front row of the conference room, intending to find a seat to sit down, Lin Lao hurriedly beckoned: "Xiao Feng, come up above!" ”

"It's all your own people, just sit down."

"It's all your own people, come up and sit!"

Qin Feng didn't shirk anymore, went up and sat down.

"In terms of surveying and mapping imitation, our group will temporarily allocate 100 million funds, if it is not enough, we will allocate funds later, test or something, we need the Air Force to provide us with fuel, we can't always watch and shout refueling, we have to really refuel us."

"There is about 100 million, let's try not to overspend." Jiang Lao, as the chief engineer of this project, began to express his position: "We will also adopt the same chief engineer responsibility system as J-10, and the imitation of various parts will only be paid if they are handed over to departments at all levels and the finished product will be paid." ”

Song Lao was poked in the backbone by the people in the system because of this system, and even scolded him for how many years he could live, after all, this system made the lazy people in the system lazy, they used to use R&D funds to conduct research, and they spent all the money to continue to make reports, and now, suddenly told them that they would give money only when there were results, and they would be hellish if they didn't scold their mothers.

But it is precisely because of this system that the J-10 has come out of a low-cost road, and the entire research and development cost 4 billion yuan, compared with the West's development of the same type of aircraft, at least tens of billions of dollars.

Now this kind of engine imitation, of course, has to be done in the same way.

Qin Feng smiled: "That's right, you have to use this way, all the parts that can be produced by other factories of our Pacific Group will follow this routine, and you will only be paid if you are qualified." ”

The factory in Jincheng is already making parts such as leaf discs for Rolls-Royce, and of course it can also be made for the third aunt, but they can only make part of it, after all, the engine has a cold end and a hot end, and the hot end has some parts, which requires high processing technology.

Surveying and mapping imitation of the three uncles' engines is not their team to produce all the parts, so many domestic engine factories can participate, especially the 430 factory, which was originally made of Spey engines, and must be able to undertake the processing of many parts.

"Okay, the oil for testing in the future, our Air Force will cover it all." Lin Lao also waved his hand.

The trial production of the engine costs money, and the test also costs money, and the aero engine is definitely a monster that drinks oil, and a ton of fuel is not enough for the engine to burn for an hour.

However, this fuel must also be provided by the Air Force, after all, the Pacific Group, a private enterprise, cannot buy it, so should the Air Force sell fuel to the Pacific Group? It has to be supplied for free.

The Air Force can't be an iron rooster that doesn't pull out a hair.

"Okay, let's talk about the venue, Mr. Qin, where are we going to set up this new venue?"

"It's best to be in the capital, your troops will coordinate a piece of land for us, and it doesn't have to be close to the city center, even if it's near the princess's tomb."

Lin Lao was a little stunned, this doesn't seem to be in line with your style, some time ago, because of those things, you were still making a fuss about transferring, and you also planned to set up a second chip production plant in the magic capital, now, why do you want to set up this engine factory in the capital?

Lin Lao originally thought that Qin Feng said that he wanted to be in Jincheng.

A chip is a chip, an aero engine is an aero engine, which one would not dare to cut off the electricity and water of their aero engine factory?

It is better to stay in the capital, of course, in the capital, after all, the capital has an innate advantage here, and it is even convenient to recruit workers and engineers. When recruiting, who wouldn't want to say that the work unit is in the capital? Even if it is not solved, there will be countless people rushing to the capital.

In later generations, there was also an aero engine factory in the capital, which was established for commercial flight, and now, Qin Feng will come to lay a foundation!

"If that's the case, our troops have a piece of land......" Lin Lao thought of something.

"No, this land must be granted by the government to our Pacific Group, and we can't take advantage of the trouble of your troops." Qin Feng resolutely objected, and said for a long time, I am here to ask for land, do you understand? What do you want your troops to do? It's always rent, and I want my own land.

"Lao Lin, you mean Xiao Bailou, right? Our land can be exchanged with the government first, so that it will become government land, and then it will be granted to the Pacific Group, and this procedure will be legal. Another leader said.

Little White House!

Of course, Qin Feng knows that this place is located about three kilometers north of the princess tomb, which belongs to the middle of the West Third Ring Road and the West Fourth Ring Road in later generations, this place is absolutely good, and the neighborhood is also a high school district, with a strong academic atmosphere.

In that special period in the sixties and seventies, even the planes produced by the aircraft factory were not up to standard, and the representatives of the Air Force stationed in the factory were also driven away, not to mention returning to the factory for maintenance, which made no sense, so a large number of planes were forced to stop, and in 1970, the Air Force could no longer bear it and put forward a new slogan.

Mainly repaired by the troops, and overhaul is not out of the army!

Under the guidance of this ideology, the Air Force set up its own engine repair shop, and Xiaobailou was the first, and the Air Force's maintenance team started from scratch and began to work hard to solve the problem of engine overhaul.

However, because the area of Xiaobailou was not large enough, and it did not meet the needs of dispersion and concealment at that time, the Air Force soon established other repair shops, such as Factory 35, which was the famous 5719 Factory in later generations, specializing in repairing the third aunt, and the repair technology was better than that of Lao Maozi, if it was not necessary, they could completely produce the third aunt's engine by hand, and there was no need to import it from Lao Maozi at all.

There are more and more repair shops in the Air Force, and the small white building is abandoned again, just for the Pacific Group.

"Okay, the building is there, we can use it directly after cleaning, and we can add some machinery and equipment." Qin Feng nodded.

That's it!

Northern Institute.

"This time, I heard that Lin Lao and they secretly went to Lao Maozi's side, and I don't know if they got us an RD33 engine."

"Yes, that Mr. Qin is very conclusive, he can solve the engine problem for us, and we have also studied it, if we use RD33 to match our J-8 fighter, it is really no problem! It's much easier to use than our turbojet-14, not to mention, I don't know if the turbojet-14 can be used. ”

The technician was discussing when suddenly, someone hurried in.

"Everyone, inquire clearly!"

"Clear?" Li Ming was excited: "Is there an RD33 engine we need?" ”

"Nope."

I'm not happy without you!

The big guy was speechless for a while, and the smile on Li Ming's face also froze instantly.

"However, I heard that Lin Lao found an opportunity and flew a Su-27, and Lin Lao was very satisfied with this aircraft and was full of praise."

Su-27?

Although the Cobra maneuver was exhibited at the Paris Air Show in June 89, but now, the name of the Su-27 has spread, and as a developer of the aircraft, of course, know how advanced this aircraft is.

"So what, this kind of aircraft is Lao Maozi's most advanced heavy fighter, and it is exclusively used by the Territorial Defense Force, even Lao Maozi's Air Force is not qualified, and Lao Maozi will definitely not sell this kind of aircraft."

"How can you do it without fighting for it? Besides, as long as the Air Force moves its mind, there will be a turnaround, when the time comes, even if the Su-27 can't be bought, buy the MiG-29 and come back, the two aircraft are similar in appearance, performance is also about the same, and the RD33 engine is also used, when the time comes, it will definitely be introduced into the production line, look at the whole country, and only our north can complete the task of introducing production! ”

Li Ming's eyes suddenly lit up, yes, why didn't he think of this opportunity?

With J-11, the Air Force doesn't pay much attention to J-8, even if it is tinkered out, it doesn't make much sense, it is better to take this opportunity to introduce an advanced fighter, MiG-29 and J-10 are the same size, with MiG-29, they will be able to defeat 611 again in the north!

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