Chapter 481 Installing turbofan 15 on the J-5
Think of another way?
Everyone looked at Qin Tao with expectant eyes.
"Mr. Qin, do you have a way to buy this kind of engine from Lao Maozi?" Everyone admires Qin Tao's ability. Now that Qin Tao said this, it is obvious that he wants to help. !
"We can find a way to buy it. As long as we give money, there is nothing we can't buy. At the same time, we can also use our own engines." Qin Tao said.
“Mr. Qin, our own engine, the turbofan ten, is still under development. Considering the technical difficulty of self-developed engines, it may take more than ten years, so we simply can’t wait!”
The domestic aviation industry is of course aware of the heart disease problem it faces, and has been working hard to solve this problem. The turbofan ten is the expectation for the replacement of the J-10 and J-11, and has been under research and development. However, it is no longer the original The goal is so high, and everyone knows that it takes a long way to go.
“Yeah, when our turbofans mature, we won’t be restricted by others on the engine. But now, we can’t do it yet.”
“Who said we can’t do it? Don’t we have any other engines to use?” Qin Tao looked at everyone: “I heard that the turbofan No. 15 has started bench testing and it is very stable!”
Turbine fan fifteen?
This is another key model in the aviation industry. This engine comes from the technology of the R-79 engine obtained from Damao. At that time, a lot of money was spent to purchase its full set of production technology, including the production process of various materials. etc.
Therefore, after getting it, China proposed a three-step strategy. The first step is to completely imitate the R-79 engine. This imitation is called the turbofan 15, and it is mainly used to power the J-31A. , that is, that international cooperation project provides the impetus.
Since the international cooperation project has received a large amount of funds, the first step of replicating the R-79 has gone smoothly. Although the bench test is only the first step, it will also need to be installed on the aircraft for testing, etc., because it is already mature. , so it will be ready for use very quickly.
Next, it’s time to improve on it, such as increasing the turbine front temperature, etc., to further increase its thrust. This project has already begun. Many people recruited by Qin Tao from the Rainbow Kingdom are busy with this project. For example, Vanessa is an expert in single crystal turbine blades.
Then, it is based on its core machine and equipped with a new external duct to achieve stronger power output capability.
Qin Tao put forward a new point of view: to replace the engine of the J-15 currently under development with a domestically produced turbofan Fifteen!
Hearing what he said, Mr. Gu showed a bitter smile on his face: "Mr. Qin, this engine allows us to obtain advanced aviation power, but it is not suitable for use on our J-5! Don't use it for now. Talking about the control system problems caused by different engines, just talking about the size of this engine cannot meet our needs. Its diameter is 1.7 meters, and the diameter of the AL-31F3 engine we originally planned to assemble is only 1.3 meters, just talking about this diameter, there is no possibility of changing the two! The technical difficulty is almost the same as re-development!"
We also considered it, but finally gave up because it was not suitable!
“1.7 meters in diameter?” Qin Tao looked at everyone present: “Are you sure?”
"Yes, we have contacted 624, and the data they gave us is this much." Mr. Gu said.
Qin Tao looked at Luo Yang again.
When Mr. Gu was talking just now, Luo Yang remained silent. He is the designer of the J-15 and came to this meeting together. One can imagine his mood. However, without an engine, everything is in vain. !
"Gong Luo, please call the 624 Institute now and confirm with them the diameter, length, weight and other parameters of turbofan 15. In particular, tell them that we do not want to rotate the nozzle, just I want that engine in front!”
Luo Yang stood up: "Okay, I'll make a call now!"
Everyone in the conference room was a little curious. What did Mr. Qin mean by such a request?
Can this engine be used?
impossible. One has a diameter of 1.7 meters and the other has a diameter of 1.3 meters. They are completely different. How can they be replaced?
There was a telephone in the conference room, so after Luo Yang stood up, he walked a dozen steps to the telephone and started making a call.
“Hello, I am 601 Suoluoyang. I would like to ask you for the detailed parameters of the turbofan 15. Yes, I want the specific parameters!”
While holding the phone and talking, he took out a pen and paper to prepare notes.
“What? There are two diameter parameters? How come there are two?” Luo Yang was completely shocked.
Everyone present was also shocked.
“Oh, when the rotating nozzle is added, the diameter is 1720 mm. If the rotating nozzle is not used, the diameter is 1370 mm.”
When they heard Luo Yang speaking out the data while on the phone, the people present were even more shocked.
These two figures are simply unbelievable. Everyone has heard that it is 1.7 meters, but unexpectedly, there is another figure of 1.37 meters!
(After checking a lot of information, I finally found the table data of these engines. For R-79, there are obviously two data, which makes people very curious. Later, after studying for a long time in a book club, I thought that one of these two data is One with a nozzle, and one without a nozzle.)
The AL-31F3 is modified based on the third uncle. Its diameter is 1.3 meters (the exact data is 1280 mm.) If it is replaced with an engine with a diameter of 1.7 meters, it is definitely impossible. However, if the diameter is 1370 mm, , then it is only 90 mm larger, and it can be used after slight modifications!
Now, Third Uncle is completely imported. Therefore, this kind of moisture-proof treated engine specially used for carrier-based aircraft can only be imported from Laomaozi. It is impossible to disassemble and improve it by oneself. However, if the turbofan Fifteen produced by oneself If so, since the production technology has been mastered, it would be much more convenient to make improvements based on it!
In other words, the turbofan 15 can be used!
If there is a qualified engine, then the research and development of the J-15 will not be a big problem!
At this time, Luo Yang had put down the phone and came back. He was holding the paper recording the data in his hand, with excitement on his face.
“From the appearance point of view, with a little improvement, it can be completely inserted in!”
The diameter has been mentioned, and the next important dimension is the length. The length of the original engine is 4.92 meters, and the length of the turbofan 15 is 4.78 meters. (There is also another data of 5.23 meters. I don’t know which one is more appropriate.) In short , there is no problem with the length.
Luo Yang was very excited: "The biggest problem is not its size, but its weight. Our 15-inch turbofan is about 300 kilograms heavier than the third uncle, and the two engines are more than 600 kilograms heavier." !”
When it comes to the weight of the engine, people are often confused by different numbers. Take the third uncle as an example, the weight data is 1530 kilograms. With its thrust of 122.5 kN, we get a thrust-to-weight ratio of more than 8, reaching that of the third-generation aircraft. level.
However, the West is very dissatisfied with this data, because Lao Maozi's engine is calculated as dry weight, which is the weight of the engine without any oil, while in the West, when calculating the thrust-to-weight ratio, it is wet weight, which is the weight of the engine. Total working weight.
If calculated using the Western push-to-weight ratio, the third uncle's push-to-weight ratio is only about 6, which is quite ugly.
As for the turbofan 15, which is a replica of the R-79 engine, the data is still the same.
Its dry weight is 1850 kilograms. The dry weight alone is 300 kilograms more than the third uncle. As for its wet weight, it has reached a terrifying 2750 kilograms! (It is also said to be about 2.5 tons)
In short, the biggest problem encountered when replacing this engine is the weight!
As the weight increases, it will cause the center of gravity of the entire aircraft to change. After the center of gravity changes, the control of the aircraft must also change accordingly. If you understand the overall design of the aircraft, then of course there will be no problem.
But now, it is quite difficult for them.
"However, we can reduce the weight added to the engine in other places." Luo Yang had an idea: "We use a large amount of composite materials on the rear fuselage of this J-15 fighter. This should be able to It has a certain weight reduction effect. At the same time, in the process of improvement, the replacement of landing gear and other equipment will originally lead to a different weight distribution from the T-10K. Therefore, we will eventually involve the center of gravity of the entire machine. After further calculation, I decided to do it together this time! Compared with the workload, the performance improvement is worth it!"
Although the engine has several hundred kilograms more, the increase in thrust is even more incredible!
The original engine had a thrust of less than 130,000 Newtons. What about now? After replacing the turbofan 15, the thrust increased to 152 kN! It has nearly 20% more thrust than the prototype, which will make the takeoff performance of this aircraft even stronger! Ski jump takeoff depends entirely on the thrust of the engine. This solution will take the performance of the aircraft to a higher level.
Thinking of this, Luo Yang was extremely excited.
"Replacing the engine is a big project!" Mr. Gu said with emotion: "Currently, the construction period of our aircraft carrier is about five years. If we want the aircraft carrier to have combat capabilities, it is best to have carrier-based aircraft. It will be completed within three years, and the pilots will be trained in the next two years. When the aircraft carrier is renovated, the pilots will be able to board the ship directly. But now, if we change the engine, it will waste even longer time!"
Whether it is the J-82 or the J-15, they all belong to their 601 institute, so he does not prefer one to the other. For him, of course he also hopes that the J-15 can succeed, but time is very tight!
The modification of the J-82 is less difficult and can get on the aircraft carrier faster and better.
After hearing what Mr. Gu said, everyone became nervous again.
This is indeed true, they can't waste time!
what to do?
Qin Tao smiled: "So, we have to design the modification, and at the same time, we use this modification plan to fool the old man!"
This is a two-pronged preparation!
On the one hand, we should be self-reliant and use our own engines to provide supporting equipment, so that Lao Maozi knows that we can complete it without your engines. On the other hand, Lao Maozi should be anxious and hurry up and sell door-to-door sales.
Although the replacement potential of the turbofan 15 is quite large, Qin Tao also knows that with the current strength of the 601 Institute, it is not easy to replace the engine, and the time really cannot be delayed.
So, the plan to replace the engine is used as an excuse to threaten the old man!
When Qin Tao first proposed it, it was this plan, a comprehensive plan. It was definitely inappropriate to use the turbofan 15 to replace it, because later generations used the turbofan 10 to replace it!
When the J-20 was test-flying, it used a turbofan 10. When the turbofan 15 became mature, it was replaced with a turbofan 15. However, the turbofan 15 at that time should be different from the current turbofan 15. the same.
Everyone has complicated expressions.
This is the great thing about Mr. Qin, and only Mr. Qin can come up with such a genius idea!
Since there is a problem with the engine, then solve the problem with the engine! Qin Tao hit the point directly, and he really thought of a solution.
When everyone knew that the size of the turbofan 15 was suitable, they all thought that this engine change was the final solution. Who would have thought that the engine change was actually to deceive the old man and allow him to relax the engine export restrictions!
It can be said that if the turbofan 15 is replaced, the J-15 will definitely have stronger combat capabilities. However, the technical problems of replacing the engine will also trouble everyone for many years and delay the finalization of the J-15 equipment.
So, preparing with both hands is the best solution.
Wu Shengli looked at Qin Tao with satisfaction. He knew that Qin Tao would definitely be able to come up with a solution, but he did not expect that Qin Tao's solution was so wonderful and solved the problem perfectly.
When we first discussed the introduction of the Su-27 production line, Lao Maozi held back and refused to export the supporting engine technology of Sanyifu. Lao Maozi planned to use the engine to contain Dongfang. The engine is the heart of the aircraft. If there is no engine, Then the plane won't be able to take off.
Now, if we switch to using the turbofan 15 to match it, we can completely leave Lao Maozi behind and play alone!
Lao Maozi will be in a hurry if he doesn't, so if you use this as a threat, Lao Maozi will definitely become anxious!
"Mr. Qin, none of us are good at this. How about you go negotiate with Lao Maozi?" Mr. Gu tentatively said to Qin Tao.
Qin Tao glanced at Mr. Gu: "Do you still need me to come forward for this kind of thing?"
“Yes, if you come forward, we will definitely get it done. This is also for the development of our navy.”
“Okay, but I also have a request.”
“Say it, we will be satisfied!”
"There are some Americans in our base who were invited by me. One of them, Delano, has always wanted to fly our Su-27. I have said hello to the Air Force several times, but there is no one there. Echo." Qin Tao said: "The aircraft manufactured by your 112th factory need to be tested before leaving the factory, so you have to make this Delano enjoyable."
What?
Lao Gu opened his eyes wide.
Your request is too much, right? That's a fighter jet, a fighter jet worth tens of millions of dollars each! Converted into RMB, the factory-produced J-11 costs over 100 million yuan!
Would it be fun for your guests to play with such an airplane?
Your face is too big, right?
If you think about it, you can tell that the Air Force will certainly not agree to Qin Tao's request. The dozens of Su-27s currently on hand in the Air Force are all treasures. How can they be flown by the most elite pilots in the Air Force? Someone of unknown origin was flown away?
This is because everyone doesn't know the crazy things Delano has done in the United States. If they knew, they would probably fall out with Qin Tao right now.
Of course Mr. Gu is not willing to let outsiders touch him. Besides, even if they built the aircraft, they do not have the right to directly hand it over to outsiders to fly. The Air Force also has a large number of military representatives stationed in their factory, and the aircraft Everyone is keeping a close eye on the test flight in the aircraft factory!
So, the possibility is almost zero.
However, it would not be appropriate to reject Qin Tao directly.
So, Mr. Gu couldn't answer for a while, he was just thinking rapidly in his brain.
"He is the best Tomcat fighter pilot in the U.S. Navy. In the future, when we have an aircraft carrier and conduct actual aircraft training, we will need him to help gain flight experience." Qin Tao said, "So, now we treat it as Let him get used to flying."
Qin Tao's words made Gu Laomao suddenly enlightened.
"If that's the case, how about we let him wait until we develop the carrier-based J-5 for the navy and let him fly it?" Mr. Gu said.
The J-11s currently produced are all for the Air Force. Of course, the Americans cannot touch them. The Navy's are different. Anyway, the Navy's carrier-based aircraft must be trained by Americans, so we might as well let Americans fly them. .
“That’s not possible, he has to train in advance!” Qin Tao rejected Mr. Gu immediately.
“He needs to train in advance, and he can use a flight simulator.”
Wu Shengli lowered his head to drink tea. He never participated in such discussions.
“No, a flight simulator is meaningless, unless it is a dedicated J-11 flight simulator.”
“Yes, we have this dedicated cockpit simulator.”
After some negotiation, Qin Tao had no choice but to lose.
"Unfortunately, we are currently producing mainly single-seat J-11s. If we could produce a two-seat J-11, it would be no problem to let him experience it in the rear cockpit." Mr. Gu continued to comfort him.
Only with the J-11B will there be a two-seat model. Now they are all single-seat models. Stable production has just begun, and it is impossible to modify them as soon as they come out.
"Yes." Qin Tao also sighed: "When the two-seat model becomes available in the future, it can be converted into a powerful fighter-bomber. Our navy needs this kind of weapon the most."
The navy is equipped exclusively with the Su-30 series and has never been equipped with single-seat aircraft. This is also due to different use requirements.
What the navy wants is long-range anti-ship combat. The Su-30 is equipped with powerful anti-ship missiles, which is a powerful combination. At the same time, to complete the task of launching anti-ship missiles, the two-seat aircraft certainly has the advantage. Later, it became famous The J-16 also has a two-seat layout.
Of course, these are things for the future.
This time, Wu Shengli put down his tea cup and participated in the discussion.
“The two-seat aircraft is indeed what our navy needs most. We have been paying attention to the Su-30. Ever since it appeared at the air show, our navy thinks it is our best choice. What a pity!”
At the end, Wu Shengli sighed, and everyone knew this sigh.
It’s a pity that I don’t have any money!
The Navy has too many projects to support, and it is simply impossible to raise funds to purchase a large number of fighter jets. Especially now that the J-15 project is still under way, there is no money to purchase fighter jets. Therefore, for the time being, it is better to use the Flying Leopard first. Just make up the numbers, after all Feibao is cheap.
"It's not a pity. Lao Maozi's Su-30 is not mature yet." Qin Tao said: "The so-called Su-30 they used at the air show may be replaced by the Su-27UB. If anyone sees it, We can let them purchase it first. When they have matured the Su-30 for flying, it will not be too late for us to buy it. Of course, it may also be that by that time, our domestic aviation industry will be able to produce the two-seat version. Fighter."
This kind of thing cannot be rushed.
Of course Qin Tao knew that the first export target of the Su-30 was Asan. The third brother proudly purchased forty Su-30MKIs. Later, he spent a lot of money to introduce a production line and produce 140 aircraft in the third brother's hometown.
It is said that it is a model with a vector nozzle. The vector nozzle has a lifespan of only fifteen hours, which greatly satisfies the third brother's self-esteem.
The East can produce Su-27, what does this mean? We can produce Su-30, and it also has vector capability!
"Yes, we still have to wait. When our economy develops better, we will have an opportunity." Wu Shengli said: "Today's meeting was very successful and we found a solution to the problem. Now, if If you don’t have any other questions, how about we go out and take a look at the aircraft carrier simulation base?”
The conference room is set up here for this purpose.
Hearing Wu Shengli's words, everyone nodded immediately. They had already heard that an aircraft carrier simulation base had been established here, and everyone had not visited it yet.
Everyone poured out of the conference room and headed inside the base. In the distance, they could see several J-31A fighters painted in black, making arrangements.
This kind of airplane looks really grand!
"This J-31A fighter is definitely a miracle!" Luo Yang lamented: "If another ten years pass, there will really be no need to carry out our J-15 project. The Navy can just purchase this aircraft directly. .”
“What a pity, this kind of aircraft is only single-engine, so it is not safe for the navy!”
“If you want to take off and land vertically, you can only have this layout. Single-engine is single-engine. The navy has no choice.” Qin Tao was very domineering and did not consider the feelings of Wu Shengli and others around him.
(End of this chapter)