If you only stare at one point, you won't see the overall situation, and now, Wen Lao and Song Lao's vision is different, of course, Qin Feng also made this mistake.

Song Lao and Qin Feng are only staring at one model, they both know that once the progress of the turbojet-13 imitation cannot catch up, the progress of the J-7III will be delayed greatly, and after this progress is delayed, the project may really be yellow.

However, Wen Lao is not, he is engaged in engines, he looks around, what he sees is his engine, what aircraft can be replaced.

The thrust of the turbojet-13 has increased a lot, and it can meet the needs of the current aircraft!

For example, the J-7M, which is now selling well, can't it be replaced with this engine? Of course, no problem, after changing this engine, the thrust is more sufficient, the power is stronger, and the maneuverability is better!

Another example is J-8, J-8 has now been changed to both sides of the air intake, increasing the weight, if you replace it with a turbojet-13, you can continue to improve its performance, and, everything else does not need to be changed, the intake flow or something, are all matched, it can be said that the turbojet-13 is the perfect alternative.

In the research and development of the engine, there can be no falsehood, if you use substandard materials to manufacture turbojet-13, reluctantly installed on the aircraft, in the test flight, there may be all kinds of accidents, as a rigorous engineer, although you know that the schedule is very important, but now, you must not relax the requirements because of the schedule.

In short, after the development of this engine, it will be of great help to the domestic aviation industry.

"Can it be used on our J-7 CP?" Qin Feng couldn't help but ask.

Qin Feng asked this question with a long-term consideration.

Now, the J-7 CP is a project in cooperation with Pakistan, and even the main attack on Pakistan, according to the negotiation between the two sides, it is to import F404 engines from the United States for use.

At the same time, there is the same demand in China, at least in the Navy, which is very interested in this aircraft, and even plans to convert this aircraft into a carrier-based aircraft.

However, if you keep buying F404 from the outside world, on the one hand, the cost is high, and on the other hand, it is easy to be controlled by others.

So, if you have the same type of engine, that's the best. Even in the country there are plans to copy F404 in the middle of the project.

However, Qin Feng has long known the difficulties in engine manufacturing, not to mention the advanced turbofan engine, it is just an engine similar to his own turbojet-7, it has taken so long, and it is still overcoming the process, so if you want to map and copy the F404, I don't know how many difficult roads you have to go through.

After a long time, it may be really yellow, but now, there is a direct choice, this turbojet-13 has come out, the thrust is higher than that of the turbojet-7, can it be used on the J-7 CP?

Elder Wen listened very carefully, and he said to Qin Feng: "At present, it seems that it will definitely not work. The J-7 CP, the F404 engine that is planned to be equipped, has a thrust of eight tons, while our turbojet-13, even after it is made, has a thrust of less than seven tons. ”

J-7 CP is so changed, the power required is straight up, the customer directly locks the F404, of course there is no problem, the thrust is enough, the fuel consumption is relatively low, but, if you are on the vortex jet-13, the thrust is too bad, it is not easy to use.

Qin Feng naturally knows this truth, and now that he hears Elder Wen say the same, it seems that it is enough to choke.

"However, it is still possible for us to improve this engine on the basis of thoroughly mastering the turbojet-13." Elder Wen continued to speak.

Step by step, it is absolutely not possible to improve a certain index, the engine is a systematic project, and a single change will only bring a miserable ending.

First master all the technology of the engine, build a complete qualified engine, and then slowly improve on this basis.

"Yes, if you want to improve, the first step is to put on our hollow turbine blades and increase the turbine front temperature." Song Lao on the side spoke.

The higher the temperature that the turbine blades of the engine can withstand, the stronger the power of the engine, when the jet engine just came out, the temperature capacity of the turbine blades was only 750 °C, and in the 90s, it reached 1500 °C, and the temperature of the latest engine, the turbine has risen to about 2000 °C.

At this high temperature, any metal will melt, and now it needs to work stably, which is not simple, and a common way is hollow cooling.

The inside of the turbine blades is hollow, so that the internal ventilation allows for forced air cooling, which allows the blades to withstand higher temperatures, which of course requires the development of various new high-temperature resistant material technologies.

Hollow blades are already a technology mastered in China.

In order to prepare the engine for the J-8 program, it was necessary to increase the thrust of the turbojet-7, and the experts in the aviation industry at that time could only boldly change the turbine solid blades at that time to hollow blades, and use forced cooling to improve the high-temperature resistance of the blades.

After the research of countless experts, the 9-hole forming precision high-temperature casting alloy hollow blade was finally successful, and China became the second country after the United States to master this technology.

The first turbojet 7A engine was successfully tested with this blade, and the afterburner thrust was increased by 11% compared with the original model.

The current turbojet-13, according to the original design, is still a solid blade, after becoming a hollow blade, you can increase the thrust, at the same time, there are other technical means, if used together, there is no problem with the thrust exceeding seven tons, and it can even move towards seven and a half tons, but it is estimated that it is difficult to reach eight tons.

However, if it can eventually grow to 7.5 tons, it will be about the same.

"Gollum, Gollum." At this moment, Qin Feng's stomach screamed again, and Elder Wen said: "Let's go, let's go to dinner, while eating, talking, Old Song, you are definitely not here for the Vortex Spray-13, right?" ”

was really said by Wen Lao, the expression on Song Lao's face had betrayed him, in fact, to coordinate the turbojet-13, of course, is a supporting role, his main purpose is still for the No. 10 project!

"Is it for the Turbojet-15?" Qin Feng on the side asked tentatively.

Old Song nodded heavily: "Yes." ”

When it came to Project No. 10, Qin Feng was also interested, the turbojet-15 was determined after several meetings, and the engine selected for Project No. 10 was selected, but Song Lao was still full of worries about this kind of engine.