Lin Hongfei can actually understand the approach of the Soloviev Design Bureau very well, but understanding is one thing, whether he will cooperate with him to do so, that is another matter...... An ordinary wage earner hopes that his boss who has hundreds of millions will give him even one percent of his worth, and the boss can really understand the idea of the wage earner, but will the boss give one percent of his family property to this wage earner? Apparently not.

Therefore, when the Solovyov Design Bureau took out his plan book with great interest, and Lin Hongfei glanced at it and threw it aside with a disgusted face.

"Mr. Lin, what do you mean by that?" Pirm's face flushed, and Lin Hongfei's movements did not hide his disdain at all, if it weren't for the fact that the Solovyov Design Bureau really needed the money, he would have smashed a punch on Lin Hongfei's handsome face.

"It's nothing, but I don't think Mr. Pirm's request is at all realistic...... Look at what conditions you have proposed," he pointed to the document, as if the conditions were written on the cover of the document, "I must purchase 300 D-30-2 engines before I consider licensing the D-30-2 engine technology to my company, hehe, what level is the technical level of D-30-2 still need me to say?" After 300 units, we still need to negotiate, according to your agreement, if you don't agree at that time, I can only buy your engines...... Mr. Pirm, you shouldn't doubt my IQ? Think I'm a fool? ”

Facing the menacing Pyrm, Lin Hongfei was a little annoyed in his heart: he felt that his IQ was underestimated, did Nima Laozi look like a fool?

Pillm also knew that his request was a bit outrageous, as the first-generation D-30 engine that had been eliminated by the Soloviev Design Bureau, and wanted to sell the scrap at a gold price, which was indeed outrageous. But he had a reason to back down, he argued, "D-30-2 is a great civilian turbofan engine, this kind of turbofan engine with a maximum thrust of 6,800 kilograms cannot be produced in your country until now." Of course, we will not talk about this, I will say that only two such engines are needed, and an aircraft with a take-off weight of 50 tons can easily be sent to the blue sky, and the aircraft is guaranteed to cruise at a speed of more than 850 kilometers at high altitudes. If the overall aerodynamic layout of the aircraft were designed more rationally, it would not be impossible to reach even a cruising speed of 900 km. Crucially, it's cheap enough to cost $1.3 million a piece, one-third of the price of comparable thrust engines in the world, but it takes a full 3,000 hours to overhaul. I think this is the best engine for your requirements. ”

"Mr. Pirm, are you really thinking of me as a fool?"

Lin Hongfei looked fixedly at the head of the Solovyov Design Bureau. Suddenly laughed. "That's right, D-30-2 is very cheap, and my country really can't produce the same type of engine, but you should know that I want a commercial turbofan engine, and the design requirements of modern commercial aero engines are to improve the reliability and safety of the engine. Extend the life of the engine as much as possible and effectively reduce maintenance costs, for which the price of the engine is higher. ”

"I have every reason to believe Alexey . Tupolev has already told you about our requirements for the improvement of the TU-134 airliner, of course. I don't care, I believe what he said to you, my goal is to transform the TU-134 into an aircraft that can compete with the Boeing-737 and Airbus A320, and an aircraft designed in the 60s that is now discontinued into an aircraft that can compete with the Boeing-737 and Airbus A320, two of the most advanced narrow-body midsize civil airliners? You must have been surprised, right? But he was right, and that's what happened. ”

Pierm's eyes widened in surprise: he finally believed it now, and before that, he thought his old friend was joking with him.

"Mr. Pirm, you should understand by now that as businessmen, especially those who work in the aviation industry, they don't really care much about the initial purchase cost of the engine and the whole aircraft, but more about the maintenance cost of the engine and the entire aircraft throughout the service life...... We all know that in the whole process of using this aircraft, the maintenance cost is several times or even more than ten times the cost of the whole machine and engine procurement, it doesn't matter if it is a little more expensive at the beginning, as long as the later use cost is low, it will greatly reduce the comprehensive cost of the entire service life, whether the engine in the wing time can be extended enough, that is, to reduce the cost of flight hours, which is equivalent to making the airline make more money, which is what the airline values. ”

"The purchase price of CFM International's CFM56-3B/C engine used in Boeing 737 is 3.9 million US dollars, which is indeed three times that of D-30-2, and the general overhaul cost is 100-1.1 million US dollars, which is indeed similar to D-30-2...... If I remember correctly, the D-30-2 engine is that it must be returned to the factory for repair after 3,000 flight hours, and the cost of each repair is about $1 million, am I right? ”

Pillm's heart began to sink as he found himself underestimating the young man from the Republic: he knew more about aero engines than he had ever expected. But at this time, he had no way out, and argued strongly, "Yes, it is true, but in this way, the comprehensive use cost is still more advantageous than our D-30, right?" ”

"That's not right!"

Lin Hongfei unceremoniously refuted Pirm's words, "Mr. Pirm, believe me, I know more about the development trend of international aero engines than you think, Boeing has been put into the market since the mid-80s 737-300/400/500 series aircraft installed CFM56-3B/C engines have begun to use appropriate maintenance. ”

"Through appropriate maintenance means, CFM International can ensure that the engine is effectively used for at least 20,000 hours before overhauling, and when the engine is used for a long time, monitoring measures can be strengthened, as long as there is no problem under the premise of ensuring sufficient EGT margin, and it can also be used to extend the wing time and save the cost of overhaul hours of the engine."

"But do you have proper maintenance measures for your D-30-2 engine? No, probably the entire D-30 series engine does not have the means of proper maintenance? Anyway, I've never heard your propaganda before. ”

"Your D-30-2 only has 3,000 flight hours, which means that if I use a CFM56-3B/C engine, it will cost me about $500 per unit from the time I start using it until the engine undergoes its first overhaul; What about your D-30-2, which needs to be overhauled 7 times during this period, which costs almost $7 million, and the purchase cost of another $1.3 million, which is $8.3 million...... This is not counting the losses caused to the airline because of these 7 overhauls, counting these, compared with CFM56-3B/C, your D-30-2 in the first 20,000 hours of service life is at least $6 million more than the cost of CFM56-3B/C, the second 20,000 hours, at least $6 million more, until the two engines are completely scrapped, the cost of D-30-2 engines is at least $6 million more than CFM56-3B/ The cost of the C engine is at least 20 times higher. ”

The maintenance of the engine is relative to the regular maintenance, this Pierm naturally knows the way, the principle is very simple, the so-called engine maintenance, is no longer hard to stipulate the engine overhaul interval and other indicators, in addition to those to the service life of the parts must be scrapped regardless of the situation, other components can be regarded as unlimited life, which parts need to be maintained, then through a certain monitoring means to monitor the health of the engine, Monitoring means include monitoring the EGT, VIB, FF of the engine with special engine monitoring software, in addition, it is also necessary to collect the engine magnetic plug, hole probe, lubricating oil consumption and so on in real time, so as to determine the real-time condition of the engine, and make a maintenance plan and a repair plan in a timely manner.

If appropriate maintenance is not adopted, in order to ensure safety, it is necessary to formulate a hard time limit for engine overhaul, and this hard time limit must be less than the actual wing time of the engine, which will inevitably increase the cost of overhaul.

It's easy to say, but it's not simple at all, so to speak, the appropriate maintenance of the engine is the latest technology in the development of aero engines at this stage, and Russia naturally covets this technology, but unfortunately, Russia does not, and the Soloviev Design Bureau wants to develop its own means of appropriate maintenance, but they have no money.

Of course, even so, the woolly bear is still much better than the republic's aero engines, at least their aero engines are overhauled long enough, but at this stage, the republic's aero engine overhaul time is ...... Ahem, none of the two have a total life span of 800 hours.

This is indeed a little unbearable: in the field of aero engines in the world, the Soviet-style engine is the second-rate in the world, but the Republic can only be regarded as the third-rate in the world, and it belongs to the wave that can finally manufacture its own aero engines.

Lin Hongfei looked at Pyrm with a sympathetic expression, "Now I finally understand why your Russian planes can't buy Europe and the Soviet Union, and you need at least 2 engines for a plane, and the high cost of your engines is ...... Americans and Europeans are really not stupid. ”

Pillm's face was already dead to ashes: he really didn't expect Lin Hongfei to know so much about his own engines and the engines of the Americans. (To be continued......)