Chapter 2384: Specific technical issues

"However, if we want to have a take-off weight of 1,000 tons, we need a lot of things. For example, we need to have advanced high-thrust engines." Akseleyev said: "For example, our previous pigeon land For an effective aircraft with a take-off weight of 400 tons, it is necessary to install 8 NK-87 turbofan engines in the front of the aircraft, with a single thrust of 13 tons. Now, if we follow our previous design, it is equipped with eight aircraft for take-off. If you increase the engine, the thrust must be at least 20 tons."
They can manufacture ground-effect aircraft, but they are just a general research bureau like other aircraft research units. They need the equipment provided by the following design units. They want to promote a thousand-ton ground-effect aircraft. Eight engines, each with at least 20 tons of thrust, this is still less to say, the minimum requirement, can they do it?
"This is of course no problem." Qin Guan said: "Now, we already have this level of engine in our country. If it is used as the power of passenger aircraft, there may be reliability problems, but it is used for this kind of ground effect. If the aircraft’s engines are still eight together, that’s fine."
The significance of the big push is also significant. In China, when the turbofan ten is successfully developed, it means that a series of big pushes are expected. For example, the core machine of the turbofan ten has a large bypass ratio. The fan, without the afterburner at the back, can become an excellent engine for passenger aircraft.
At present, the domestically produced Yunshi passenger aircraft has begun to be equipped with a large number of such engines. As for exports to the international market, if the importing country is not assured, it can also be matched with Eagle Country or European engines.
The maximum thrust of this engine was originally only 15 tons, but with the development of civil aviation, this kind of power is obviously far from enough. Therefore, the country is also studying a new generation of engines, first of all using the core of the turbofan 10B The machine has been improved. Before the new fourth-generation engine was developed, it was developed on the turbofan 10B. Continue to increase the external ducts, which can reach the order of 20 tons. This 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 cannot be rashly installed on a passenger plane. After all, for a passenger plane, as long as one mechanical accident occurs, it may cause a chain reaction, or even It will lead to the loss of trust in the entire world, so now, it is logical to use it on one's own ground-effect aircraft, and it is completely possible to accumulate engine use test experience in this way.
In fact, speaking of civil aviation engines, it is also very difficult. The engines of various famous aircraft in the world are also quite advanced. It is also very difficult to develop. When Rolls-Royce was developing the RB211 engine , It almost collapsed Rolls-Royce, but later, after the successful development of this 27-ton thrust engine, Rolls-Royce achieved a qualitative leap, with a series of explosive engines behind. The research and development of engines has also become a masterpiece of civil aviation engines in the world.
And to say that the world’s largest civil aviation engine is undoubtedly the 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 the later Yun-20. Now, this engine can be regarded as entering the Guinness World Records.
Now, Qin Guan is confident that his side will eventually reach that level, but for now, it would be good to be able to have a twenty-ton class. The important thing is that this is the Western standard.
Xiong’s engines also have great thrust, but they are all at the expense of life span, etc., and cannot meet demand at all. Western standards, maintainability, life span, etc. are all quite high. This kind of engine is truly in line with the development trend.
The engine is the heart. Without an engine, nothing can be done. Now, Qin Guan agreed with just one bit of the engine issue, completely eliminating Akseleyev's concerns.
"Also, it is the material of the body." Akseleyev said.
Ground-effect aircraft, like airplanes and boats, no matter what the classification is, it is to fly into the sky after all, which means that its weight is as light as possible. Therefore, ordinary shipbuilding uses steel and the like It can’t be used, it needs to use aviation aluminum alloy and other materials, and a thousand-ton product is not only a problem with aluminum alloy, it must be titanium alloy in the key stress parts. Titanium alloy is a metal that naturally belongs to the aerospace field. It is light in weight and high in strength. Many fighters now use titanium alloys on various parts of the fuselage.
Qin’s point of view:
Yes, for material issues, you can turn to our relevant departments. If you need good materials, you can. But, personally, if you want to equip this kind of ground-effect aircraft in large quantities, The cost factor must be considered. Compared with advanced titanium alloy materials, I personally prefer stainless steel."
When developing the MiG 25 that year, Xiong Guoren took a different approach. In order to solve the problem of thermal barrier, Ying Guo used expensive titanium alloy to build, while Xiong Guo used cheap stainless steel, which has high strength. It’s just heavy weight, but the advantage is that it’s cheap. Just look at the output. The Blackbird only produced more than two dozen. The MiG 25 is not more than a thousand, and definitely more than five hundred. Cost is determined.
Qin Guan gave Akseleyev a reminder like this, yes, why didn't he think of it? Aluminum alloy will face moisture and salt corrosion problems at sea. For carrier-based aircraft, the impact is relatively small, but this kind of ground-effect aircraft is to land on the sea, and it will definitely be more affected. .
If it is made of special anti-corrosion stainless steel, it is obviously better. Of course, aluminum alloy should be used, and stainless steel should be used where strengthening is needed. In this case, it should be able to obtain cost and weight. A compromise.
"I have another idea." Qin Guan said: "Since you are here, we must use our advanced electronic technology to greatly improve the flight safety of this ground-effect aircraft. I think it is the most What is needed is advanced navigation and operating systems to increase its reliability."
The last sentence Qin Guan said was the real idea. Caspian monsters and the like sounded famous, but they actually failed to equip troops. There were various factors in it. But one of the most important is its reliability.