Chapter 829: Hangfa poor three generations

Tan Zhenhua, who had been chatting with Liu Daxiang for a whole day, realized that he still underestimated the investment required to build an aviation development.
Let’s not talk about the huge amount of research and development funds needed to get the countless types of metal and non-metal basic materials on an aviation ship, and the various processes required for this kind of super-precision manufacturing machinery and equipment. , Investment in special tooling fixtures, special equipment, just talk about testing.
Since human beings have not been able to make an accurate mathematical model of the working mechanism of various parts of aeroengines so far, aviation development in the world is at a stage of derivation based on empirical data and empirical formulas. , The development process of this thing is not so much derived from rigorous calculations as it is based on the accumulation of a large amount of experimental data.
Is it familiar?
Yes, classmates, you are right. At present, the development of aero engines is closer to an experimental science.
Since it is an experimental science, there is an important link-trial and error.
The United States, the recognized leader of Bluestar's aviation development, said: "Today's test is for tomorrow's flight."
This sentence is not fabricated by Qian Zhiyu, but a large slogan hung on the wall of the American Arnold Development and Testing Center (AEDC).
In the development process system of Air China, the meaning of this sentence is more than just a slogan.
According to their standards, in the complete development process schedule of an aero engine, the time spent on engine testing accounts for more than 70% of the total development time!
That is to say, a new type of engine is put into use, it will take hundreds of thousands of hours of testing, and it is necessary to constantly troubleshoot and improve the design during the experiment process to achieve the best design working state.
Therefore, in the aviation industry, there is often a saying: "Aero engines are tested out." This shows the importance of testing to aero engines.
The fundamental purpose of engine tests is to test and improve its performance, operability, and durability. In order to achieve these goals, the types of these tests can be said to be diverse and diverse.
According to the physical process of engine research, there are tests such as ignition, starting, over-temperature, over-rotation, acceleration and deceleration, durability, environmental adaptability, pollution reduction and noise reduction; according to engine composition, there are complete machine test and compressed air Engine, combustion chamber, turbine, afterburner, nozzle, adjustment system and accessory system, etc., and there are multiple tests for each component, such as compressor performance test, distortion tolerance test, surge margin test , Press flow field dynamic measurement and imported rectifier blade multi-stage adjustable function test, etc.; and according to the final purpose, it can be divided into research exploratory test, new machine or modification test, batch production routine test, etc. In a word, just finishing these experiments will not be possible for ten or eight years.
This is also the reason why it takes a long time for an aviation development from the establishment of the project to the final usability and ease of use.
From these numerous experiments, we can see how much money is needed to develop an aviation engine.
Even in the 21st century, so many countries in the world, known as industrial countries, also have G20, but only the United Nations five permanent members can truly independently develop aero engines and successfully produce them for practical use.
At that time, Isaac, after unscrupulously obtained the full set of Gallic aviation drawings, only gave up after imitating some botched works, and finally bought American products. The development of this engine was not smooth and went bankrupt.
At this point in time, only the United States and Soviet Russia can truly establish a complete aero-engine pedigree.
As for the reason, it is too simple, because only this pair of rivals known as the "two poles of the world" has enough power, manpower, time, and financial resources to burn this engine.
That's why Liu Daxiang said that to Tan Zhenhua at the beginning. In his opinion, even if the second son of Tan is rich, he claims to be rich and inferior to the country. If he enters this pit, it is inevitable that "hangfa is poor for three generations. As a result of the experiment ruining a lifetime, his reminder was purely out of good intentions, not wanting to pit this good looking little brother.
As for those who use their own power to get the aviation technology in the novel, just look at it as a joke. It belongs to the little guys who have no hair on their mouths and don’t have any engineering concepts in their minds. Stuff.
However, Tan Zhenhua explained to Liu Da wanted to say: "Chief Engineer Liu, although I am a layman for aviation development, I also know that some aviation development is difficult and the investment is huge, so what I did is not to develop a model from scratch. The brand-new aviation development, I think it should be a national investment, your mission; moreover, referring to the experience of advanced countries in the Western world, it needs to start with the pre-research of the core machine and advance it step by step. This kind of completely positive research It’s impossible to finish it in less than 20 years. Of course, I also know that from the perspective of scientific research accumulation, it is necessary for China to go through this process completely. This will be of great benefit to the future development of China’s aviation industry. but--"
When he said this, he paused and said in a very unceremonious tone: "But this is not inconsistent with what I want to do now. Mr. Liu, you also know the current status of China's aviation development. You are welcome. It’s because the Three Machines Department is always vacillating between laying a solid foundation and eager for quick success in the decision-making of the aviation development project. As a result, it hasn’t gotten both ends yet. Tell me about it, except for this "Bei", can we still come up with an engine that is close to the world's latest technology? And as far as I know, when we already have a usable turbofan engine that represents the future direction of development, our approach is not completely understood. Its technology continued to develop on top of it, but instead it opened a new "turbojet" model project. To be honest, I can't figure it out anyway!"
Tan Zhenhua finally looked at Liu Daxiang’s slightly flushed face and concluded:
Mr. Liu, maybe you think I’m talking in a layman’s language, but from the perspective of a businessman, I think the first thing I consider is Use the fastest speed to integrate the existing resources at the minimum cost in exchange for the greatest benefit. Since we have "Speey", then I will try my best to drain its surplus value. Mr. Liu You have spent a lot of time in Rolls-Royce. You should know that their company has used this engine that is not too advanced, how many models it has produced, and how many units have been sold. Now, for the current Luo Luo, "Speey" has reached the end of life. They can still sell us the technology and make the last money. To be honest, I admire their down-to-earth style. ."
Although the words are intense, they are not aimless.