Compared with the negotiation process of the Solovyov Design Bureau, the negotiations with the Yakovlev Design Bureau were simply easy and pleasant, 10 days, a full 10 days of arguing, and still no results were discussed.

Some brothers will say that this kind of project, which has a huge impact on the national defense strategy, is not it normal to talk about it for three days, but for three years? It is not easy to reach a cooperation intention now.

This is true, but the crism of the problem lies not in this, but in another: the Solovyov Design Bureau is willing to transfer the technology of the D-30 and D-30KU turbofan engines in civilian versions to the Gutsy Provincial Industrial Manufacturing Company...... In fact, there is still a large number of defense enterprises hiding behind the Guqi Provincial Industrial Manufacturing Co., Ltd., but now it is the Guqi Provincial Industrial Manufacturing Co., Ltd. that is dealing with the Solovyov Design Bureau...... The D-30KP for the military and the D-30F-6 with afterburner are not transferred at all.

This is what drives Lin Hongfei the most, if it is just a civilian D-30 and D-30KU, then there is a meaning of hair?

D-30KP is the biggest meat head, not only the D-30K series engine with the highest technical content, but also the premise for all domestic parties to reach a compromise on the introduction of D-30 series turbofan engines from the Solovyov Design Bureau by Guqi Provincial Industrial Manufacturing Co., Ltd.: it is necessary to introduce the military version of the D-30KP-1/2 turbofan engine...... They also know that the D-30F-6 military turbofan engine with afterburner used on the MiG-31 high-altitude high-speed interceptor cannot be sold to themselves under any circumstances, but the D-30KP without afterburner can always be sold, right?

The attitude of the Solovyov Design Bureau is tough, not for sale!

D-30 and D-30KU can be sold, and we can not only provide you with a full set of technical information. Assist you in building factories and production, and even help you improve them hand-in-hand, but D-30KP-1/2 is not sold! I don't sell it for any amount I give!

That's where things come to a stalemate.

……………………

For the negotiations between his son-in-law and the Solovyov Design Bureau, Dongfang Zheng naturally paid close attention to it, and the negotiations were deadlocked, which was naturally the most unhappy for him to see, but Dongfang Zheng was very puzzled by the aero engine, in his opinion, D-30KU and D-30KP are about the same, since Da Mao is willing to sell KU is not willing to sell KP. Then let's buy KU, don't you want KP? As for the condition that AVIC bowed to Lin Hongfei...... It's easy for everyone to discuss!

"It's different, Dad," Lin Hongfei, who had been frowning all this time, shook his head, "D-30KU is a civilian engine. D-30KP is a military engine, and there is a big gap between the two technologies...... Let me tell you so. In terms of aero engines. Military technology is always ahead of civilian technology, military aircraft represents the highest level of technology of a country, and after a period of military aircraft use, it is used to convert its technology to civilian use, that is, the core technology of military aircraft is redesigned according to civilian standards, although it is only one word missing. However, the difference between D-30KU and D-30KP engines is not only in terms of power, but also in terms of technology. ”

"And what's going on?" Dongfang Zheng was very surprised by his beloved son-in-law's words, although the old Wang family was backed by the civil aviation system, he did not grow up in the family since he was a child. There really aren't many people who know about these things.

"Well, I definitely can't hide this kind of thing from you," Lin Hongfei nodded, he didn't say it casually, "For example, the B-1B strategic bomber that the Americans are using now uses four F101-GE-102 military turbofan engines with afterburners produced by General Electric Company, and after a period of time, the core technology of the F101-GE-102 engine was used to develop the civilian CFM56— Type 2 turbofan engine, and then successively developed CFM56-3 series and 5 series, become one of the most competitive models in the international commercial aircraft engine market, it can be expected that as long as General Electric and SNACMA continue to improve the CFM56 series, within 20 years, CFM56 series turbofan engine will be one of the important models of civil aircraft, I even think that the life cycle of this series of engines can be maintained for at least 40 years. ”

"So powerful?" Dongfang Zheng was really scared.

"It's really powerful," Lin Hongfei nodded, "The main thing is that the core design of the F101-GE-102 is very good, and the potential for development and improvement is very great,"

After a pause, he added, "Of course, to tell the truth, the D-30 is not bad, this series of engines is actually a very classic engine, the status in the Soviet aero engine system is quite high, it is a bit of a bear version of the F-110 turbofan engine taste, the versatility is also quite good, from the Tu-134, Tu-154 these civil aviation airliners and Il-76 can be seen, this is a family of quite large series of engines, even the MiG- 31 The engines used on this monster are all D-30 series, but they are D-30F-6 twin-rotor small bypass ratio turbofan engines, and the maximum thrust can reach 15.2 tons, which is terrifying. ”

After hearing Lin Hongfei say this, Dongfang Zheng fell into deep thought.

Lin Hongfei previously purchased the Tu-134 passenger plane from the Tupolev Design Bureau, which used the civilian version of the D-30-2 turbofan engine, and the maximum thrust of the engine was only 6.68 tons, far inferior to the 12.5 tons of the D-30KP-1 used by Da Mao himself, even if it was the D-30KP, there was a thrust of 12 tons, and even the D-30KU used on the Tu-154, the maximum thrust of the engine was 10.16 tons.

Now the republic has the opportunity to obtain a full set of technical materials for the 10-ton turbofan engine, and it is even possible to be taught by hand, just like the industrial system of the republic with the help of the Soviet Union...... This possible reality makes Dongfang Zheng's heart move: you must know that the maximum thrust of the engine of the Republic is not more than 10 tons, even if the most advanced engine in our country is now turbojet 13, the maximum afterburner thrust is only more than 6 tons, and the design thrust of the turbojet 13B that is being worked on can probably reach 7 tons, but I don't know when Lu Dao happened.

In addition, it is probably the imitation of the "Spey" MK202 engine: turbofan 9, but again, although AVIC is vague about the development progress of turbofan 9, but with their ambiguous attitude, it is enough to choke within 10 years.

If the D-30 can be introduced, even if it is a civilian D-30KU, it means that the Republic has the production and manufacturing capacity of high-thrust turbofan engines with a maximum thrust of more than 10 tons...... Even if it is civilian, it should not be a big problem to install such a high-thrust engine on a large civilian transport aircraft, right?

Of course, it would have been fine if it had been like this at the beginning, but now, Dongfang Zheng was somewhat unwilling, he hesitated for a moment and said, "Is the technical gap between D-30KU and D-30KP really as big as the technical gap between F101-GE-102 and CFM56-2?" ”

"That's not true," Lin Hongfei plunged into the ocean of turbofan engines during this time, and he has reached a considerable level, and has been able to reach the level of those "network experts" in later generations, and he can still make a relatively correct judgment on this issue, "The Russians' D-30K series is a little better than the Americans, so compared to the relationship between the CFM56 series and the F101 series, if the D-30KP is a purely military engine, then D- 30KU can be regarded as a product of a half-military and half-civilian...... It's not that the Soloviev Design Bureau doesn't want to do the same thing as the Americans, it's just that it's too expensive. ”

"That's easy to say," After Lin Hongfei explained this, Dongfang Zheng nodded and asked rhetorically, "Since D-30KU is half-military and half-civilian, and D-30KP is purely military, then D-30KU and D-30KP must have a lot to figure out, right?" We can digest and absorb the D-30KU technology at the same time, and then reverse the development to make a D-30KP. ”

"You mean, hold the D-30 and D-30KU in your hand first?" Lin Hongfei understood what his father-in-law meant: he didn't want to see this situation drag on.

For this point, Lin Hongfei agrees, as the saying goes, there are many dreams at night. But he must say some words in front for his father-in-law's reference, "This is not impossible, but, Dad, the use of relatively advanced core technology of civil aircraft, in turn through the technology of civil aircraft to develop military aircraft, is not impossible, but this is often a last resort, usually can not obtain advanced military aircraft technology of countries and regions have to practice, must be redesigned according to the requirements of military aircraft, first of all, according to military standards and design specifications to put forward military aircraft technology indicators, Determining the parameters of a new engine according to the requirements of a military aircraft takes no less time than researching a new engine. ”

"According to my analysis of the relevant regulations and regulations of the US Department of Defense and the US Air Force during this period of time, as well as the process of developing engines in the 80s, the development cycle of new aircraft models in the United States is 5 to 6 years, the development of new components is 2 to 3 years, the development of core aircraft is 2 to 3 years, and the development of verification aircraft is 3 to 4 years, a total of 12 to 16 years, while the development of new aircraft in China, including the development of new aircraft using advanced core technology, takes about 18 to 20 years, which means that even if we are based on D-30KU, It will take at least 10 years to develop our own military version of the D-30KP. (To be continued......)