Motor! By now, Song Lao has finally started to run this engine.

At the beginning, Qin Feng once proposed to use the third aunt to change the clothes of Jianshi, and at the time he thought it was very simple, but later he learned that there were many problems here, and if he wanted to change his clothes, he would face large-scale changes.

Originally, due to the introduction of the Su-27, the research and development of the J-10 has already felt a lot of pressure, and if it is delayed because of the engine, it will be even more stressed.

"Have we decided to replace the Su-27 engine?" Qin Feng asked Song Lao, his eyes were full of joy, a qualified aircraft is inseparable from the engine, and the research and development of the engine is more advanced than the aircraft, so it is very difficult for the domestic aero engine mechanism to overcome the difficulties of the third-generation engine, and the J-10 project is easy to be dragged yellow by the engine, which Qin Feng is very clear.

"Yes, we're going to change the third uncle." Song Lao said that although the number is AL-31F, everyone is used to calling the third aunt by the way, and this title has spread.

"We repeatedly learned about the imitation of the turbojet 15 and the research and development progress of the turbofan 10, and finally made up our minds, of course, this is also because General Liu made the decision." Song Lao said, took off his glasses, wiped them, and when he said this, he was very emotional.

Song Lao wants an advanced engine, as a designer, of course, he likes the most powerful engine, but when the design has been completed, modifying the design and delaying the progress is a big taboo.

However, in order for the J-10 to have excellent performance, this modification is necessary, and that prototype has changed a lot.

In particular, the domestic aero engine industry has disappointed Song Lao, and the turbojet-15 that has been engaged in for several years cannot be imitated, and if it is put into production, it is necessary to buy the MiG-23 engine from the international market, so can the J-10 be regarded as a third-generation aircraft? Can it still be mass-produced?

"Like RD33, if you want to use the third aunt, you have to transfer the attachment from the top to the bottom." Song Lao said: "I came this time to contact the Rurika Design Bureau, and they have already begun to modify it for us, and this modified model has also been given a special name, called AL-31FN. ”

An additional suffix is added at the back, this batch of power is specially for domestic production, specially used to match the J-10, so, if you think that with the Su-27 and J-10, the engine can be exchanged, this is actually not possible, because the location of the accessories is different, and it is not possible to stuff it directly.

However, the main body of the engine is the same, now, with the introduction of Su-27 fighters, related maintenance negotiations are also underway, for example, there should be an overhaul plant for the third aunt engine in China, so that when the engine reaches life, there is no need to send it back to Russia to overhaul, in addition to saving costs, it is of practical significance, once the war comes, the country can not produce its own engine, forget it, the overhaul ability is always there, otherwise it will be too passive.

"Yes, Old Song, I believe this is the right choice." Qin Feng said: "The paper data of this engine is still good, especially in terms of reliability, which is completely guaranteed. ”

After watching the Cobra maneuver of the Su-27, you can know how stable the operation of its engine is, this is a high-thrust turbofan engine, and only the United States and Russia can develop it in the world!

"Yes, we also took a fancy to its performance, so we made up our minds to use it, this time, it's a big project, our fighter has changed a lot." Song Lao said.

After all, this is a foreign country, in order to prevent leaks, Song Lao didn't say too much, the changes are very big, it is inevitable, the entire rear fuselage has been changed, and the air intake tract has also been modified, which is almost the same as the research and development of the Su-27, from T-10 to T-10K, there has been a reborn change.

Jianten, there has also been a big change, and this change will not be known until Qin Feng goes back.

"I really hope that our fighter planes can be built as soon as possible." Qin Feng said with a sigh.

These words aroused Song Lao's thoughts again, Qin Feng wanted to see it earlier, why not Song Lao? And now, Song Lao has a hunch that after this improvement, although he has a lot of muscles, there will definitely be a carp jumping over the dragon gate!

Although the turbojet 15 has the advantage of high altitude and high speed, but after all, it is a turbojet engine, the fuel consumption rate is high, the range is insufficient, the third aunt is refitted, the fuel consumption is reduced, and the range is up, at the same time, the potential for continuous improvement is also great, and the rear fuselage is expanded, which also means that there is enough space, and the new engine that may appear after the replacement is replaced.

"Actually, we are not worried about the airframe, and now we are mainly worried about the flight control." Song Lao said: "It's hard for Tingting, I often trouble her to solve some problems, and our technicians have also benefited a lot." ”

After all, Gu Tingting has studied the program of telex control for many years, and many ideas are inspiring.

Gu Tingting is also responsible for the research and development of K-8V, and she also has to take care of the children at home, which is really rare.

"yes." When it comes to his wife, Qin Feng is also grateful, taking into account the overall situation, and being able to take care of the small family, while he is always running back and forth, and he has not made much contribution to the family.

"Okay, your task is to complete the training here, and the country will send you out, which is all high hopes." Song Lao looked at a few people, stayed for an hour or two, and then left in a hurry, and had to catch a plane back to China.

Looking at Song Lao's back, several people clenched their fists, everyone had the same thoughts, domestic affairs, they were powerless, they could only train here, improve their flying skills, and contribute their strength to the motherland!

Test flight, no matter how many problems you encounter, you must complete the training of test pilots here!

After sending off Song Lao, a few people walked back, and suddenly heard the roar on the airport, raised their heads, and saw a large passenger plane, which was slowly descending, and the three engines in the tail were so clearly visible.

"Tu-154!" Qin Feng recognized it at a glance, and at the same time, several people opened their mouths wide, could it be that he trained the Tu-154, so he deliberately transferred this plane to his own side for his own test flight, right? That's too strong, isn't it?

The country must have spent a lot of money, fly well, fly seriously, don't waste the funds of the Motherland!