Chapter 767: heart disease

"This is your real goal, right?" Song Wenhua finally understood. He was circumvented by Tan Zhenhua, and finally stepped into the pit that the kid had dug in advance...
That doesn’t seem right, because Tan Xiaozi’s suggestion sounds pretty reliable. At least his analysis of customers is very consistent with Song Wenhua’s usual feelings. Think about the various entanglements of poor customers buying airplanes. Song Wenhua felt that Tan Zhenhua had a good grasp of their psychology.
No wonder this kid can earn such a huge amount of value in such a short period of time. He is really a business man. It is a pity that he has a clever mind. He wants to be his own student and engage in aviation. How good?
Song Wenhua thought with regret, but when he spoke again, his tone became softer: "Zhenhua, your idea is good, but there is one biggest problem."
"It should be the engine, right?" Tan Zhenhua responded with a smile.
"You can see it too? Yes, this is the engine."
Song Wenhua frowned and said, "Look, according to your Super Seven plan, the weight of the aircraft must be increased a lot. Modern electronic instruments and high-power radar are used in the aircraft. These are big power consumers. To generate electricity, a part of the power must also be separated from the engine, so that the power that was originally not too sufficient will be worse, and because the "J-7" has a relatively small fuselage, the fuel load factor is inherently low. The engine we use now The fuel consumption coefficient is high, so that if one is going to increase the other, the combat radius will have to be further reduced-if you are not afraid of your jokes, the troops are originally dissatisfied with the combat radius of our aircraft, and those who don’t worry will return it. "Janqi" has the nickname "Airport Defender". If this is dropped again, the group of people are afraid that they have to scold their mother?"
This is really troublesome.
Aviation engines have always been the Achilles heel of China Aviation Industry.
Let's talk about J-7.
Tan Zhenhua certainly knows that the current J-7 is equipped with a "turbojet 7" engine. This engine is a Chinese imitation of the Soviet-made Р11Ф-300 engine introduced with the "MiG 21", axial flow type, dual rotors, with afterburner.
Since the introduction of this engine, the relationship between Huaxia and Soviet Russia has been broken, so its imitation work can be said to be very difficult, especially Huaxia’s backwardness in the field of materials science has led to the successful imitation of the engine whether it is thrust or use In terms of life, the performance of the original version has been greatly reduced.
In order to solve this problem, China Xia organized top experts in related fields to tackle key problems, and Rong Ke, an expert from the Beijing Institute of Aeronautical Materials, put forward a bold idea: to increase engine thrust, the temperature in front of the turbine must be increased, and the front of the turbine must be increased. The key to temperature is to solve the problem of high temperature resistance of turbine blades. The best way is to change the solid turbine blades to hollow blades, and use forced cooling to improve the high temperature resistance of the blades.
This whimsical idea at the time was approved by everyone. Later, Rong Ke and Hua Ming, the chief engineer of Shengjing Engine Factory, found an old friend in this book to perform this scientific research task.
Everyone must have guessed it, yes, this old friend is the father of China Material Science, Shi Changxu.
The teachers and elders lived up to their expectations, and it took only one year to complete the 9-hole forming high-temperature casting alloy hollow blade.
In the world at that time, only Americans had mastered this kind of solution and technology, and the British Rolls-Royce did not develop it until 8 years later, so that when Sir Hook visited China for the first time, he saw these Chinese The self-developed hollow blade once said with emotion: "Just seeing this achievement, I did not come to China for nothing."
However, individual achievements and leadership cannot conceal the overall backwardness of China's aviation development field. Even the "Turbojet 7", which has been blessed by teachers and veterans and many of China's top scientific research gods, has only 100 times for its first renovation. Hours, but the full life span is only 300 hours. Even after entering the 1980s, the "Turbojet 7" developed to its second model, the "Turbojet 7B", which can only achieve the first 200 hours, full life 600 hours.
Moreover, the thrust of this engine is only 4.4 tons, and the afterburning thrust is only 6 tons. It is too unrealistic to use this weak engine to respond to the series of development plans proposed by Song Wenhua.
"It's really troublesome for our China Airlines to have this heart disease." Tan Zhenhua sighed.
Zhan Nuozhu asked puzzledly: "Don't we have Spey? And I heard that there are still many unused original goods in the warehouse. Can't you use it?"
Song Wenhua glared at him and said, "Speey? Are you going to stuff that thing weighing more than 1.8 tons into the belly of "J7"? What a joke!"
Zhan Nuozhu smiled awkwardly, but Tan Zhenhua fell into nervous thinking.
Obviously, a small body like the "J-7" can't fit into a thick, long, and heavy ram like Spey, and it must be a medium-thrust engine.
Looking at the world, at this time in the early 1980s, there are only a few available and easy-to-use middle pushes. The most powerful is of course the F404 series, but this thing was automatically ignored after a flash in Tan Zhenhua’s mind. , Because this product is a product of the U.S. General Electric Company. With the urinary properties of the U.S. countryman, even if you bought it with the old nose, there is a high probability that the whole machine will have a lot of conditions attached. If you want technology, there is no expectation. The F-16s that are going to be sold to China are going to be replaced with turbojets!
Next is the RB199 of the old friend Rolls-Royce of course. This three-rotor engine that once made Rolls-Royce bankrupt is now the master of the most advanced technology of Rolls-Royce. It has high fuel consumption and low fuel consumption. It has no other problems except expensive. Luo Luo's current relationship with himself, there is certainly no problem in selling the whole machine, but if you want to go further and ask for technology, there is probably no hope, no one will sell their future jobs, right?
Of course, another option is the Snecma M53 from Gaul, which is the driving force of the Dassault Mirage series of fighters. The M53 is a good engine, but it is a single-rotor, an obsolete technology. Simple maintenance is its advantage, and its lack of development potential is its disadvantage. Like Rolls-Royce, Snecma is definitely the first choice to sell the whole machine, and the consistently high prices of the Gauls are also a headache.
Whether it is RB199 or M53, expensive is an unavoidable problem, and Tan Zhenhua's positioning of this future Super 7 is a cost-effective bargain. After all, its customers are poor buddies.
Alas, it would be great if Huaxia could have a suitable middle pusher, even if it is not a turbofan, a turbojet can do it for a while...Huh? No, at this point in time, in fact, there should be an engine already working?