For the J-10 project, the biggest constraint is the engine, a fighter, if there is no qualified engine, then it is impossible to successfully research.

Looking at it now, the J-10 temporarily uses the turbojet 15, and when the turbofan 10 matures, it will be replaced with the turbofan 10, which is the established plan, but there are many problems with this plan.

The turbojet 15 is too old, and the turbofan 10, the success of research and development is far away, just look at the progress of the turbofan 6, even if the domestic engine department pat its chest, the army has to look at the problem from its own point of view, and they can no longer stand the endless progress delay.

Now, since there is already a Su-27, it is definitely necessary to purchase a supporting backup engine, purchase an additional batch, and use it for the J-10, so that it can also facilitate the supply of logistics.

This plan was once proposed by Qin Feng at the meeting, but now, hearing the voice of General Liu's decision, Qin Feng hesitated, because after he went to Chengdu, he found that everyone had not considered using the Su-27 engine.

It is a very complicated thing to match the engine for the fighter, the design of the air intake, the matching of the shape of the fuselage, the integration of the operating system, etc., all of which require painstaking effort and energy.

They have been planning to use the turbojet 15 for a long time, and the current metal prototype is all according to the turbojet 15, and the metal prototype is directly stuffed into the turbojet 15, if it is to be replaced by the third aunt of the Su 27, it means a big change.

The thickness of the two is different, the third aunt is thicker, after installing it, the rear fuselage will change, the flow of the air inlet will increase, then the air intake will also change, so it will be an absolute big project.

Moreover, it doesn't mean to get the engine over, you can install it, this point is known from Tu Lao to find the engine for the super seven, the RD33 engine control system is quite backward, the volume is huge, on the MiG-29, these control boxes are on the engine, but what, on the super seven, there is no space above, you need to move to the bottom, which means that the engine has to be changed, this one change, then the trouble is big, not only to cooperate with the engine manufacturer, but also to find the whole machine factory, just like in Grumman, Need to find them as a prime contractor or something.

Now if you use the third aunt's engine, the same is true, Qin Feng has carefully studied, the third uncle's engine control system is also on it, so if it is installed on your own Jian-10, then you have to improve, move the control system, various pipelines to the bottom, and many corresponding engine experiments also need to be redone, these, is the Rurika Design Bureau willing?

Moreover, the most terrible thing is that this engine is thicker, exceeding the diameter of the rear fuselage of the current J-10, if it is used, the entire rear fuselage of the J-10 will have to be redesigned.

But is there a better option if you don't use it? After all, the third aunt is a third-generation high-thrust turbofan engine comparable to the F100!

For the engine used in the fighter, the thrust does not exceed ten tons, that is, the thrust, all kinds of engines in Europe, almost all of them are pushed, the thrust is generally about eight tons, more than ten tons, up to about twelve tons, this is the qualified big push, now in the world, only the Soviet Union and the United States have a big push, and the American F100, after the successful research and development, also faced a lot of reliability problems, and even let the F-15 have won the reputation of the queen of the hangar.

In the case of their own research and development, or without any technical reserves, it must be very difficult, and the progress will definitely not be as estimated by those engine experts, and it will definitely have to go through countless run-in periods, which will seriously drag down the J-10.

If you want to let Jian-10 serve as soon as possible, using the third aunt is actually the only choice.

Admiral Liu is quite firm in this aspect, and even insists on going his own way, even if he is said by others to be a layman leading an insider, thinking that changing the engine is very simple or something, Admiral Liu has to push it on, because he stands at a higher angle!

The following scientific researchers only consider the problem from a technical point of view, but what about General Liu? But he can consider it from a higher perspective, from a strategic point of view, and the technical problem can be overcome!

At this time, everyone didn't know, because of this decision, J-10 had to change a lot, the front like the F16 leather dragged into the air duct, turned into a rectangular air intake in the belly, because the third aunt needed a larger air intake flow, at the same time, the original straight fuselage of the tail has also become a bee waist, the area rate has been repaired in the middle, and the diameter has been expanded in the back, otherwise, the engine will not fit in.

"Okay, finally, it's time for us to think about something else." General Lin said, "How are we going to get this money together?" ”

Although the price has been depressed to 35 million aircraft, the cost of 24 aircraft, still reached 840 million, plus accessories, engines and the like, the final total amount will be fixed at about 1 billion, this number is quite huge, in the entire 80s, the largest project of domestic aviation, that is, 550 million US dollars of peace model project, and in the 70s, it is the introduction of Spey engines.

Now, it has only started in the 90s, it is a billion dollars, and there will be more in the future, so much money, how to raise it?

The Soviet Union allowed the use of agricultural products and light industrial products to offset, which is also an important point that can finally reach an arms purchase contract with the Soviet Union, when France, could have been imported to the Mirage 2000, but the French bite the price does not relax, the prime minister in the past can not negotiate, at the same time, only accept foreign exchange, do not accept agricultural products, and ultimately can not reach the project.

Now, how to make up so much money for the Soviets?

Agricultural products, there are also restrictions, the country has to use it for its own use, it is impossible to go hungry and tighten your belt to buy fighter planes, this is no longer the era before.

"General Lin, do you have a way?" Someone asked.

"I know that the Soviets were very fond of fur coats." General Lin said: "Now, it has entered winter, and our northern regions* have been replaced with warm winter long hair, and if we kill all the provinces*, we will be able to make 10,000 fur coats." ”

General Lin knew the Soviets, and they now ranked among the top three light industrial materials that were in urgent need, the first was a flashlight, the second was a hot water bottle, and the third was a fur coat.

(When I was checking the information, I was frightened by someone's post, and East China Zhixiong was afraid of trouble, so I still wrote *, this is not a forbidden word, it was deliberately replaced by * by East China Zhixiong.) ）