Since Liu Fei accepted this project, of course, he will take office immediately, because the world is changing with each passing day, and every second may cause him to fall behind the world, so Liu Fei naturally needs to keep running, running, running in order to compete for every second.

Liu Fei had a brief understanding of the Yunshi project on the way to the magic capital by train, and learned not only about the data on paper of the project, but also about the hardships behind the project.

This is a very underdeveloped era, and even the drawings need to be drawn by hand with a pencil line by line, and it is not allowed to be sloppy. It's okay to change the wrong drawing, but if you can't change it, the whole drawing needs to be finished.

In this era, there are no auxiliary systems, no golden fingers, and these technicians can only follow their own feelings and solve many international problems with their own methods.

Liu Fei soon met the chief engineer of the Yunshi project, Ma Fengshan, the chief engineer.

Now the Yun-10 project has been very successful, except for the aero engines or imported from abroad, all of them are domestic and truly reliable. In order to match the 10 projects, even the government.. The government specially launched the turbofan eight engine.

It can be seen from this that the country.. Liu Fei's purpose here is to do his best to revitalize the Yun-10 project, so as not to let the motherland's aviation industry suffer the "McDonnell Douglas 95" and "Airbus 318" again.

As soon as Liu Fei saw Chief Engineer Ma, he began to negotiate technical matters with Chief Engineer Ma, and soon gained the trust of Chief Engineer Ma. Liu Fei very calmly put forward the idea of starting over from scratch for the Yunshi project, and Chief Engineer Ma looked at Liu Fei in disbelief.

Liu Fei calmly explained: "When our Yunshi project just started research and development, there were problems, we did not do a good job in market positioning, so that we have no sales market now, but if we do a good job in sales positioning, and most of the parts are localized, then our sales market will be greatly expanded." So we need to redesign the 10, and the first thing we need is to re-conduct the market research. ”

Chief Engineer Ma turned around and found some documents from the cabinet behind him, took them out, put on reading glasses and began to read. The document is mainly a market survey of Yun Shi, but this survey came a few months ago.

Liu Fei was very surprised, he hadn't heard of any market research in Yun Shi in his own era, but he had conducted market research in this era, which was really not simple.

Liu Fei began to talk eloquently: "It can be seen that in fact, what our potential customers need is low fuel consumption, high speed, high commercial load, high passenger load, low noise and low take-off distance. Am I right, Mr. Ma? ”

Chief Engineer Ma said very angrily: "What you said is correct, but we can't solve these problems at the same time." To reduce fuel consumption, you need to sacrifice speed, but also sacrifice load capacity and comfort; If you want to increase the commercial load, you have to sacrifice speed and fuel consumption, as well as take-off distance; If we want to reduce the take-off distance, then we need a more advanced engine, and with the current JT3D, we can't do such a difficult task. There should be no way to do anything about the noise, after all, we are using a turbofan eight modeled after the Pratt & Whitney JT3D engine. This turbo spray: The turbofan engine that was modified from the injection engine has limited the direction of improvement. In that case, it won't help if we do it all over again. ”

Liu Fei said very profoundly: "No, no, no, Ma Lao, you are wrong." Not only did I get the Yun 10 project, but the Turbofan 8 project is now in my hands, and I need to redo both projects according to the market demand. Our turbofan 8 will not be based on the backward JT3D, we will learn the design scheme of the more advanced JT9D, CF6, CFM56 and other internationally best-selling engines, and combine our own needs and our basic national conditions to design. In this case, the engine will be able to solve the problem, and then you will have to work overtime with the team to redesign the fuselage of our aircraft. ”

As soon as Chief Engineer Ma heard that there was hope for an engine, he immediately began to ask Liu Fei how big an aircraft he needed to study. After all, the bigger the plane, the better, and sometimes there are big ambitions, and it is unlikely that there is no practical plan.

Liu Fei thought about it for a moment, and said while knocking on the table: "With our current technology, I think the turbofan eight can only barely reach the thrust level of 12,000kgf even after improvement. In this case, the four engines are hoisted under the wings, and the total thrust is about 48,000kgf, which cannot be ruled out that the thrust of the engines we will develop in the future will be larger, but we must start with the smaller thrust. The flight crew is set up to three to four people, including one chief and one co-pilot, one flight engineer, and one second co-pilot for transoceanic flights. The length of the aircraft is between 50 and 55 meters, and the wingspan is between 45 and 50 meters. The wing sweep angle is about 30 to 33 degrees, so that the high-speed performance and high-altitude performance will be better. The width of the fuselage should be controlled between 5 meters and 6 meters, and the width of the fuselage should be as wide as possible. In this way, we can arrange a 3+3 seating layout to make better use of space. I expect that the capacity of such an aircraft should be between 260 and 280 passengers. ”

Liu Fei was very unkind, and directly took the Boeing 767-300 model of Boeing, replaced the engine, and then reported the parameters to Chief Engineer Ma.

After all, the Boeing 767 is a relatively successful aircraft, and it is a wide-body aircraft, which is much more advanced than a narrow-body passenger aircraft like the Boeing 707. The passenger capacity is not at the same level at all, and because it is a later design, the interior of the cockpit is relatively spacious, and the spacious and somewhat luxurious seats in European and American styles can be placed 3+3, and the seats suitable for Orientals should be able to achieve 2+3+2.

Although it is said that now altogether.. And.. The material technology of the country may not be passable, but after all, this is a country a long time ago. Home has already announced the project, for the country.. The face of the family, the country.. The home offers the best. Liu Fei must make some achievements, otherwise he really can't stand the silent dedication of aviation people like Chief Engineer Ma.

(Chief Engineer Ma died of depression a few years after the Yunshi project was discontinued.) ）

Chief Engineer Ma said to Liu Fei with a surprised face: "What did you say? 260 to 280?! The Boeing 707 is less than 200 people! Our current technology may not be able to meet such high requirements, after all, many things were abandoned in the previous special period. ”

Liu Fei patted Chief Engineer Ma on the shoulder and said: "It doesn't matter, I will do my best to get enough raw materials for us to make our aircraft safe and unhindered, and I don't mind letting those who stand in the way get out of class if necessary." For the great altogether.. And.. The country's large aircraft project, everyone should make a little effort, this is the society.. Host: Righteousness. ”

……

So after Liu Fei's coercion and temptation, Chief Engineer Ma finally agreed to Liu Fei to redesign the aircraft. Liu Fei got a few Apple Ap., which are absolutely rare in the flower planting family, from the Import and Export Trade Bureau. pleII. After upgrading it myself, it barely reached the level of computers in the 1995s, and after installing CAD and other drawing software, these computers are still fast.

Liu Fei taught those engineering designers how to use the computer to draw the drawings they wanted quickly and quickly, and even taught them how to create 3D models faster, which later became very important. At least the R&D cycle of Yun 10 has been shortened a lot, and it is easier to make changes on the drawings.

Liu Fei's computer mapping influenced the next generation of aviation people, and then gradually expanded to the aerospace port, and the aerospace port extended this to the military port. With the "military to civilian" conversion of many factories in the military industry, this method was brought into the civilian sector, but Apple's computers became popular for a while.