I heard that Chen Geng came back from the Soviet Union, and in addition to the senior management of Runhua Industry, the happiest one was Xifei. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

It is no wonder that whether it is the H-6 bomber or the MPC-75 aircraft that will be improved in the future, they all have to rely on the power system imported by Runhua Industry from the Kuznetsov Design Bureau of the Soviet Union; a very important task for Chen Geng's visit to the Soviet Union this time is to examine and examine the improvement of the NK-8 engine of the Kuznetsov Design Bureau, and if the Kuznetsov Design Bureau can come up with a relatively good plan for improving the NK-8 engine, Xifei is even more confident in his heart.

"Dong Chen, I can be regarded as convinced of your eyes." As soon as they met, without saying a few words, Mao Donghai said with admiration: "The people who laughed at you a few days ago have all shut their mouths now." ”

When I chatted with Chen Geng at the beginning, Chen Geng thought that the Americans and Yi @ Rak would definitely fight, but the mainstream view in China at that time was that it was impossible for the Americans to fight Yi @ Rak, and their actions were just to scare Yi @ Rak and achieve the truth of surrendering without a fight, for the following reasons...... Balabala......

However, as the US military has dispatched more and more troops to the Gulf region and assembled more and more materials and equipment, the domestic view that the Americans are just trying to scare Yi @ Lak has become more and more unmarketable. The Americans are planning to move seriously.

For Xifei, Chen Geng said that he could use the help of the Americans to fight Yi @ Lak to observe the development trend of the war and what enlightenment it has for our research and development equipment, at that time, Mao Donghai still disagreed with Chen Geng's words, but now, he can't admire Chen Geng. At this moment, when he asked Chen Geng again, he was much more modest: "Chen Dong, do you think that after this battle starts, how much price will the Americans have to pay to agree?" Is it possible for Yi @ Rak to become a second Vietnam? ”

The slogan of making the Yi@Rak War the second Vietnam War was put forward by the Iraq@Rak people themselves, and a considerable number of military experts and scholars in China also have this view, after all, the military equipment of the Yi@Rak is too much than ours, but in the face of this problem, Chen Geng said without hesitation: "If you want me to say, I still have those four words: destroy the withering and decaying!" ”

"This ...... Chen Dong, Yi @ Rak is not weak to this extent, right? Mao Donghai opened his mouth, incredulous, but he didn't dare to disbelieve it: "Although the statement of 'the world's third military power' boasted by Yi @ Rak is not small, but the equipment of Yi @ Rak is indeed very advanced, and their army has gone through so many wars, no matter how powerful the Americans are, it is impossible to destroy the Iraqi army so easily, right?" ”

Chen Geng was reluctant to argue with Mao Donghai, shook his head and said: "This thing belongs to the public saying that the public is reasonable, and the mother-in-law is reasonable, before the final result comes out, anyone can come up with a lot of arguments to prove that what they said is right, and each argument seems to be very reasonable, so let's just look at the final result...... Speaking of which," Chen Geng changed the topic and said to Mao Donghai: "Mr. Mao, the Kuznetsov Design Bureau has taken out the drafts of the improved NK-8 engine. ”

"Why did you come out so quickly?" Hearing this, Mao Donghai was overjoyed!

Compared with the Gulf War, Mao Donghai was more concerned about the improvement of the NK-8 engine, and although the NK-8-4 was also very good, wouldn't it be better if the performance could be further improved? The improvement in performance is equivalent to the improvement of the combat effectiveness of the improved H-6 in the future.

"Yes," Chen Geng nodded, and handed over a piece of paper: "This is the general situation of the improved NK-8 engine of the Kuznetsov Design Bureau, which lists the data of various modifications of the NK-8 engine, you can take a look and see which one is more in line with the needs of our military industrial system." ”

"Coming out so soon? Let me see. Seeing the piece of paper handed over by Chen Geng, Mao Donghai's spirit was shocked.

Runhua Industrial has already mastered the detailed information of the NK-8 series engines, and it is not very difficult to calculate what kind of NK-8 is more in line with the needs of the army based on the NK-8 data in the hands of Runhua Industry, but everyone is not very confident in their hearts, after all, compared with the Kuznetsov Design Bureau, which has already played the NK-8 into a flower, we cannot even afford to know the NK-8 to the extent of the four words, and on the premise that the knowledge and understanding of the NK-8 engine is not deep enough, It is likely that there was a relatively large error in the judgment made, but if this data had been provided by the Kuznetsov Design Bureau, then it would be a different matter.

The bypass ratio of the NK-8 engine is 1.02, and Chen Geng's previous request was to greatly reduce the fuel consumption of the NK-8 engine, so all the actions of the Kuznetsov Design Bureau were carried out around reducing fuel consumption, and there was not much pursuit of thrust.

On the materials handed over by Chen Geng, the Kuznetsov Design Bureau thoughtfully designed a bypass ratio from 1.4 to 3.0 for the NK-8 engine, and compared the impact of each change in bypass ratio on thrust, fuel consumption, and overall performance in a tabular way -- although this figure is not very accurate, and it is only the result of a simulation calculation before it has been tested by actual experiments, it is also of sufficient reference significance.

"The duct ratio should be 1.4, and then the fuselage diameter is 1.6 meters?" Looking at the numbers on the table, Mao Donghai frowned: "Good guy, such a thick fuselage, if you want to put this engine in, it will require major surgery, but the cruising fuel consumption of 0.746 is really touching......"

Compared with the cruising fuel consumption from 0.79 to 0.746, what makes Mao Donghai more excited is the change in thrust, although this change is not to improve thrust as the primary purpose, mainly to reduce fuel consumption and ensure reliability as the first demand, but after increasing the duct ratio, the thrust has increased to a certain extent, from 107.88KN to 114.23KN.

114.23KN ah, 0.746 cruising fuel consumption, which of these two figures is much more tempting than the turbojet-8 turbojet engine currently used on the H-6, but will there be a better one below?

After the bypass ratio of 1.4, a plan is to expand the bypass ratio of NK-8 to 1.96, and after the bypass ratio is expanded to 1.96, the cruising fuel consumption is further reduced to 0.724, and the thrust is increased to 118.46KN. Chen Geng and Mao Donghai couldn't see it.

Looking at these data, Mao Donghai was happy and happy: "This is good, this is good, tsk...... But this head is too big......"

"Don't worry, it's not that you must choose this one, you can take a look at other plans, not to mention that even if you choose a plan, we can also make corresponding adjustments to the technical indicators, right?" Chen Geng said with a smile.

"That's right!" Mao Donghai nodded, continued to look down, and then there were two duct ratios of 2.5 and 3.0, seeing this, Mao Donghai didn't even take a closer look, and after taking a rough look at the changes in the fuselage, he shook his head and said: "Such a large diameter?" I can't put it in the original position. ”

The implication is that it can only be selected among the two schemes of 1.4 and 1.96 bypass ratio, of course, which one to choose, this will be decided after the experts of the West Flying Flight, and even the various technical indicators of the engine need to be weighed again.

"Yes." Chen Geng nodded: "However, although it is not suitable for use on the H-6, it is very suitable for use on our MPC-75-200." ”

After the bypass ratio is increased to 3.0, the overall performance, maintenance interval, life, fuel consumption and other figures of the engine have been increased to a level that has reached the same level as the international engine with the same thrust, that is to say, if it can really do the data on paper that Kuznetsov provided himself, the thrust of this modified NK-8 engine is equivalent to the CFM56-5 series engine, and it is basically the same in terms of fuel consumption, life, and overhaul interval, the difference is only that this modified NK-. 8 is heavier than the CFM56-5 series, and the noise level is higher, but there is no gap in core performance.

"That's right!" Mao Donghai's eyes lit up suddenly.

Chen Geng didn't say that he hadn't thought of it, but now take a closer look, this 3.0 bypass ratio of the magic modified NK-8 is simply tailored for the MPC-75 aircraft, in addition, considering that the fuel control system of the NK-8 engine is still the ancient mechanical hydraulic type, if the latest digital full control system is adopted, there should be a possibility of further improvement in fuel consumption......

Thinking of this, Mao Donghai couldn't hold back any longer, held Chen Geng's hand tightly and said, "Chen Dong, please make sure you get this engine out, please!" ”

Chen Geng nodded solemnly: "Don't worry." ”

"There's another thing," Mao Donghai suddenly felt a little embarrassed: "This...... Mr. Chen, do you have any ideas for expanding the scope of motorcycle cooperation recently? ”

"What?" Chen Geng thought that he had misheard: my dignified Da Xifei was also moved by Runhua Industrial's motorcycle expansion plan?