Chapter 2384

"However, if we want to have a take-off weight of 1000 tons, we need a lot of things. For example, we need advanced high thrust engines," akseleyev said "For example, our previous ground effect aircraft of the flower tailed pigeon, with a takeoff weight of 400 tons, needs to be equipped with 8 nk-87 turbofan engines at the nose, with a single thrust of 13 tons. Now, if we are equipped with 8 booster engines for takeoff at the nose according to our previous design, the thrust needs to be at least 20 tons."

They can manufacture ground effect aircraft, but like other aircraft research units, they are only an overall development bureau. They need the following design units to provide equipment. If they want to promote a 1000 ton ground effect aircraft, the eight engines in front need at least 20 tons of thrust. That's enough. Can they meet the minimum requirements ？

"Of course it's no problem," Qin Guan said. "Now, we already have engines of this level in China. If they are used as the power of guest aircraft, there may be reliability problems, but the engines used for this ground effect aircraft are still eight together, that's no problem."

The significance of the big push is also significant. In China, when the successful R & D of turbofan 10 means that a series of big push is expected. For example, the core aircraft of turbofan 10 can become an excellent engine for passenger aircraft by adding a fan with large bypass ratio outside and removing the afterburner behind.

Now, Yunshi airliners produced domestically have begun to be equipped with a large number of such engines. As for those exported to the world, if the importing country is not at ease, they can also match the engines of Eagle countries or Europe.

The maximum thrust of this engine was originally only 15 tons, but with the development of civil aviation, this power is obviously far from enough. Therefore, China is also studying a new generation of engine. First, it uses the core engine of turbofan 10B to improve. Before the new fourth generation engine is developed, it is developed on turbofan 10B and continues to increase external culverts, which can be achieved To the order of 20 tons, which is also the crystallization of the efforts of countless scientific researchers.

This kind of engine has only recently been developed. If there is no long-term experiment, it can not be rashly installed on the passenger plane. After all, for the passenger plane, as long as there is a mechanical accident, it may bring a chain reaction and even the loss of trust of the whole world. Now, it is logical to use it on its own ground effect aircraft, which can be used completely In this way, we can accumulate the use and test experience of the engine.

In fact, it is also very difficult to talk about civil aviation engines. The engines owned by various famous aircraft in the world are also quite advanced. It is also very difficult to develop them. When Luo Luo company developed rb211 engine, it almost broke down Luo Luo company, but later, after the successful development of this 27 ton engine, Luo Luo company realized A qualitative leap, followed by a series of popular engines. The R & D of this engine has also become a representative work of civil aviation engines in the world.

The largest civil aviation engine in the world is undoubtedly GE90 series. The maximum thrust has reached the limit of 60 tons. It can be said that the thrust of one engine is equivalent to the four engines of Yun 20 in future generations. This engine has entered the Guinness world record.

Now, Qin Guan is confident that his side will eventually reach that level, but for now, it's good to have a 20 ton one. The important thing is that it's a western standard.

Xiongguo's engines also have great thrust, but they all sacrifice life and so on. They can't meet the demand at all. However, the indicators of Western standards, maintainability, life and so on are quite high. This kind of engine is really in line with the development trend.

The engine is the heart. If there is no engine, nothing can be done. Now on the issue of the engine, Qin Guan promised at once, completely eliminating akseleyev's concerns.

"Also, it's the material of the body," akseleyev said.

Ground effect aircraft, like an aircraft and a ship, regardless of the classification, is going to fly into the sky, which means that its weight is the lighter the better. Therefore, ordinary shipbuilding steel and other materials cannot be used, and aviation aluminum alloy and other materials are needed. For 1000 ton products, it is not just the problem of using aluminum alloy, but in the key stress-bearing parts It must be titanium alloy. Titanium alloy naturally belongs to the field of aerospace, with light weight and high strength. Many fighters now use titanium alloy in various parts of the fuselage.

Qin Guan nodded: "yes, you can turn to our relevant departments for help with the problem of materials. If you should use good materials, you have to. However, personally, if you want to equip a large number of ground effect aircraft, the cost factor must be taken into account. I personally prefer stainless steel to advanced titanium alloy materials."

When developing MiG-25, Xiong Guoren just found a new way. In order to solve the problem of thermal barrier, Yingguo used expensive titanium alloy to build it, while Xiong Guoer used cheap stainless steel. This kind of thing has high strength, but it is heavy, but the advantage is cheap. Look at the output. Blackbird only produced more than 20. What about MiG-25 There are not thousands of molds, and there are definitely more than 500. This is determined by the cost.

Qin Guan gave akseleyev a hint. That's right. Why didn't he think of it? Aluminum alloy will face the problems of moisture and salt corrosion at sea. For carrier aircraft, the impact is still small, but this ground effect aircraft is going to land on the sea, and it will certainly be more affected.

It is obviously better to use special anti-corrosion stainless steel. Of course, aluminum alloy should be used for those who should use aluminum alloy, and stainless steel should be used where strengthening is needed. In this way, a compromise between cost and weight should be achieved.

"I have another idea." Qin Guan said, "since you have come to us, we need to use a lot of our advanced electronic technology to greatly improve the flight safety of this ground effect aircraft. I think what it needs most is an advanced navigation and operating system to increase its reliability."

The last sentence Qin Guan said was the real idea. Caspian monsters sound famous, but in fact, they can't equip the troops. There are various factors, but one of the most important is its reliability.