Chen Shanxin nodded with feeling, he had heard people say that the aviation industry was a money-burning industry, but he didn't have much intuitive feeling, until he joined the Ambrera Group, he saw the original Bombardier Aviation City across the courtyard from them, and now it has been renamed China Aircraft Aerospace Industry Corporation Aviation City, just to verify various aircraft, and build large and small wind tunnel groups and test testing platforms, the money spent, made him gasp several times, Since then, I have truly understood what kind of idea it is for the aviation industry to burn money.

Whether it is an aircraft or an aero engine, if you want to improve performance, the contribution rate of materials will reach more than 50%; New structures, new materials and manufacturing technologies will contribute up to 70% to the weight reduction of the engine. "Materials first, foundation first" is one of the important objective laws of aero engine development.

Therefore, since Wang Yuanzhuo took office, before the pre-research of the fifth or even sixth generation aero engine provided by Ling Shizhe, he arranged the basic research and engineering application research of the materials laboratory on the new materials and new manufacturing technologies of aviation power in advance, and made use of the super database center established in Hong Kong and Raccoon Town, and strongly required the materials laboratory to establish a complete set of high-level new materials and advanced manufacturing technology systems for aero engines, as well as supporting standards, specifications, manuals and test databases. The application and development of new manufacturing technology in the development of advanced aero engines has laid a solid technical foundation.

In order to make the people in the materials laboratory more concentrated, Wang Yuanzhuo and Zhou Yuanhang made a report to Ling Shizhe, hoping to divide the materials laboratory into the following departments: first, the aviation power materials laboratory, which is responsible for the research and development of materials for aero engines; The project includes the research of carbon-carbon composite materials, flame-retardant titanium alloy compressor materials, third-generation rhenium high-temperature single crystal alloy materials, and new high-temperature thermal insulation coatings and other related aviation power materials.

Second, the laboratory of aviation vehicle materials. He is responsible for the research of new composite materials for aircraft, and the main projects include the research of the third generation of aluminum-lithium alloys, the second generation of aviation titanium alloys and some other aviation composite materials.

3. Ceramics Laboratory. He is responsible for the research of turbine ceramic materials, aviation power ceramic bearing materials, ceramic composite materials for the floating wall of combustion chamber flame cylinders, and heat-sensitive ceramic components for monitoring.

Fourth, the general materials laboratory. Like Ru iron boron magnetic materials, all kinds of smelting alloys are in this department.

At the same time, it is recommended that the company set up a special process technology department to be responsible for the research of processing technology of various materials.

Ling Shizhe took a look, and the two of them were completely planned according to the public information of the US military's "" plan he provided at the beginning.

It is the well-known "comprehensive high-performance turbine engine technology plan" of the US military, which was born in 1987, so it is also called the "plan".

The engine development program is a collaboration between the U.S. Air Force, the National Aeronautics and Space Administration (NASA), the Defense Advanced Technology Research Agency (DAPAR), the U.S. Army, and the U.S. Navy. It can be said that it is the most important guarantee for the power of American aviation to be proud of the world in the new century...... The goal of the plan is to double the capacity of the aviation propulsion system, i.e. to increase the thrust-to-weight ratio of the engines, by 2005...... The fuel consumption rate is reduced by 30%~40%, and the production and maintenance costs are reduced by 35%~60%.

After the new century, when the United States took stock of the harvest of the plan, it found that 80 percent of the targets under the plan had been achieved, and the United States aviation power at that time had completely dominated the rivers and lakes and sought defeat alone.

Ling Shizhe not only provided the two of them with public information about the plan, but even took out many technical details of the plan and the direction of the engine breakthrough that the United States chose to focus on.

Wang Yuanzhuo looked at things such as a small aspect ratio swept fan, flame-retardant titanium compressor materials, bi-alloy compressor discs, brush seals, ceramic composite combustion chamber flame cylinder floating walls, 'ultra-cool' turbine blades and spherical convergence adjustment tail nozzle (SCFN). When a series of technical literature, such as circumferential staged combustion chamber, ceramic bearing, standing vortex flame stabilized combustion chamber, active temperature control of combustion chamber, ceramic matrix composite flame cylinder, carbon-carbon composite turbine, ceramic material turbine, magnetic bearing, air film bearing, skeleton structure, built-in integral starter generator, model-based distributed control system, unsteady computational fluid dynamics (CFD) simulation technology and jet control vector nozzle, etc., I was almost not scared and fainted, and asked Ling Shizhe where you got these things, You probably won't steal the U.S. military's database.

But Ling Shizhe waved his hand indifferently. He's done this kind of thing many times, and whenever people ask him, he says, "How did I get these things?" You just have to ask too much, you just have to get these things out. ”

Seeing that no matter how they asked, Ling Shizhe didn't say anything, Wang Yuanzhuo and the others had to dispel their thoughts, and carefully studied the information provided by Ling Shizhe, and the result was that the more they looked at it, the more fascinated they became.

What Ling Shizhe gave them did not involve the process, and detailed development data. But it is also enough to point out the key direction for Wang Yuanzhuo's follow-up research work, for scientific research work, there is a clear goal and aimless clueless experiments are fundamentally two concepts.

Wang Yuanzhuo took the technicians of the gas turbine laboratory. The information given to them by Ling Shizhe was sorted out according to the difficulty of development, and finally Wang Yuanzhuo sorted out according to the difficulty of the technology. It was decided to start with the fan blades of the engine, and focus on the small aspect ratio swept fan first.

Zhou Yuanhang's classmate Xu Yuanlin is an international authority on fans. It only took a month to establish the mathematical model of the small aspect ratio swept fan, although this thing is still far from being applied to the engine, but for the scientific community, mathematics is the mother of all sciences, as long as there is no problem in mathematics, this thing will definitely be realized in the future, the emergence of modern jet turbofan engines is also based on Wu Zhonghua's mechanical impeller ternary flow theory.

It's time to test the results, and when he came to the Space City, Ling Shizhe asked Zhou Yuanhang directly, "How is the single hump plane doing?" ”

Zhou Yuanhang was not surprised that Ling Shizhe carried out a surprise inspection, the company will participate in the Frankfurt Air Show in Germany next month, and Poland's single hump aircraft has been engaged in a year and a half. The first prototype was built half a year ago.

Pulling Ling Shizhe to the test airport, he pointed to a large aircraft with a beautiful single wing and a propeller and said: "This aircraft is our achievement for more than a year, and everyone calls it "Little Bee". Chairman of the board, the original drawings of the aircraft you provided are too ugly in appearance. So we designed a new shape from scratch, and after repeated wind tunnel tests, we finalized the shape.

Ling Shizhe circled the plane twice, and found that the plane called "Little Bee" was indeed much better than the "single hump" aircraft produced by Polish Airlines in terms of appearance. Ling Shizhe asked Zhou Yuanhang with doubts, why did he design the plane as a two-seater.

Zhou Yuanhang explained: "Chairman I carefully read the aircraft information you provided, and found that if it is only a special aircraft for agriculture and forestry, then its application scope is too narrow, so that even if we get it, we can't sell a few units every year, so we discussed it and turned it into a multi-purpose aircraft, which can not only perform agricultural and forestry tasks, but also perform firefighting, coastal patrol, fire extinguishing and aviation enthusiasts with aviation driver's licenses."

The aircraft are all modular in design. Not only can it take off on land, with a pontoon, but it can also take off on water. The whole machine adopts an all-metal structure and is equipped with the latest GS piston star engine developed by Ambrera, which has high fuel economy and a maximum take-off power of more than 1,000 horsepower. Drive a pair of 4-blade variable pitch constant speed composite propellers, which has high propulsion efficiency.

There are two types of aircraft, single-seat and two-seater, the latter of which can be used as a primary trainer. The aircraft adopts shelf management, all the spare parts on the aircraft can be bought on the market, and all are mature and reliable technology, so it has a very high performance and price ratio. ”

Ling Shizhe nodded with satisfaction. It seems that Zhou Yuanhang has made great improvements to the basis of Poland's "single hump", the -18 aircraft, and even designed a completely new shape for it. But apparently Zhou Yuanhang has not forgotten the original intention of the design of this aircraft, while ensuring the high cost performance of the aircraft. It also greatly expands the functions and application scope of the machine, which makes Ling Shizhe quite satisfied.

Suddenly, Ling Shizhe found that there was a disassembled "Little Bee" plane parked in the hangar next to him, and it was a single-seater type.

Zhou Yuanhang saw Ling Shizhe looking at the hangar next to him, so he took him to the hangar and said: "This plane just completed a test flight yesterday, and now it is doing relevant inspections, if there is no problem, further test flights will be done." This aircraft uses a fly-by-wire operating system that the company has just developed, and we have removed the original complex hydraulic operating system. ”

"Telex operating system, you have succeeded in developing it so quickly?" Ling Shizhe asked in surprise.

The fly-bywire system is a system in which the pilot's control signal is converted into an electrical signal through a converter and transmitted directly to the autonomous servo through a cable. It removes the mechanical transmission and hydraulic lines that run through the aircraft from the joystick to the servo in the traditional aircraft control system.

A typical fly-by-wire system consists of a sensor set (various gyroscopes, inertial measurement devices such as accelerometers, and atmospheric measurement devices such as angle of attack sensors), input devices, flight control computers, servos, and electrical transmission lines. If such a system is to be implemented, the technical difficulty is not ordinary. Unexpectedly, Zhou Yuanhang and they all came out, which really surprised Ling Shizhe.

"Scares the hell out of you, right? In fact, the real fly-by-wire (FBW), especially the all-digital fly-by-wire operating system (FFBW), is still very early to come out," Zhou Yuanhang explained: "Since the company developed this aircraft, the technicians of the flight control laboratory have felt that they can make a simple FBW system on it, and after accumulating experience, it will be much easier to make an FBW control system for the T-8 jet trainer we developed." ”

"The idea is good, but have you thought about it, in this way, it will increase the manufacturing cost of the aircraft, you must know that our aircraft positioning is cost-effective."

Zhou Yuanhang smiled: "I have thought about it a long time ago, so I have prepared two sets of operating systems for him, one is the FBW system you just saw, and the other is the traditional full-power control system." This set of FBW technology is not mature, to meet the practical requirements, it is estimated that it will take three or five years, and the price is also a bit high, my plan is to use the traditional operating system to occupy the market first, and so that the FBW technology is mature, after the cost of the flight control computer is reduced, and then make an upgraded version of the "little bee". ”

"Well, step by step, don't blindly pursue the tall, it's good, I agree!" Ling Shizhe agreed with Zhou Yuanhang's idea. (To be continued)