The final reduction system can only withstand 6600 shaft horsepower?

Viktor Vladimilovich Kapaya was stunned for a moment, and hurriedly asked Wang Dazhi: "Wang, what kind of model is this batch of 'aerial cranes' in your country?"

Wang Dazhi: "It's the kind of 6600 shaft horsepower." ”

Viktor Vladimilovich Kapaja frowned: "Although we have to allocate some power to the tail rotor, it can only withstand a maximum of 6600 shaft horsepower, which is really a little worse." ”

"Who says it's not," Wang Dazhi paused for a moment and asked Viktor Vladimirovich Kapaja: "Viktor, if you hand over the final reducer to you, can you arrange your time?"

The function of the helicopter final drive is to convert the high speed and low torque power of the turboshaft engine into low speed and high torque output to the rotor shaft, and transmit the required power to the tail rotor and other accessories according to the speed and torque.

However, because the power transmitted by the final reducer is very large, the load at the gear meshing is also amazing, taking a helicopter main reducer with a limited transmission power of 3000 kilowatts as an example, a bunch of meshing gears have to withstand a force of up to 10000 kg!

It can be seen that the helicopter main reducer is a "lump" composed of a bunch of gears, but the technical content of this pimple is really very high!

In order to ensure the strength of the gears and shafts, it has to pay a considerable weight price, so under normal circumstances, the weight of the helicopter final drive generally accounts for one-ninth to one-seventh of the weight of the entire helicopter structure.

And Viktor Vladimirovich Kapaja, as the only and really top helicopter final reducer god of COMAC, Wang Dazhike pinned all his hopes on him, but the problem is that as the only two super gods of COMAC, Viktor Vladimirovich Kapaya has too much work, and Wang Dazhi is not very sure whether Viktor Vladimirovich Kapaya is willing to take this job.

But Viktor Vladimilovich Kapaja's reaction was beyond Wang Dazhi's expectations, and after he pondered for a while, he nodded: "That's it, let's not talk about these problems, you first do a market research to see how much demand for this kind of heavy helicopter is in China and whether it can make money, as for me, let's go and see what should be done to extend the life of this 'aerial crane'." ”

Wang Dazhi immediately breathed a sigh of relief, and he immediately nodded: "Okay, just do it!"

....................................

Viktor Vladimirovich Kapaya went to a certain department of the Army Aviation this time, and he went for half a month as soon as he went!

Half a month later, the dusty Viktor Vladimirovich Kapaya reported the situation to Wang Dazhi: "Wang, I took a closer look, from a technical point of view, our group has the ability to extend the life of these 'aerial cranes'......"

"Great!"

Wang Dazhi did not doubt Viktor Vladimirovich Kapaja's judgment, and when he heard this, he was immediately overjoyed.

"Don't be busy with joy first," Viktor Vladimirovich Kapaja shook his head and said: "I carefully checked the situation of this batch of 'aerial cranes', I am not optimistic, almost all the main structural load-bearing parts have to be replaced, in addition, I also focused on checking the situation of the final reducer, the mechanical condition of the final reducer is not optimistic, these years of high-intensity use has made it wear and tear very large, and it is time to replace it." ”

Wang Dazhi blinked: "So your conclusion is ......"

"My conclusion is that if your military leaders want to repair this batch of 'aerial cranes', you need to replace almost all of the main load-bearing parts and structural parts of the fuselage, that is, the replacement ratio of the entire fuselage structural parts and load-bearing parts is more than 60%, oh, by the way, there is also the final reducer, the main reducer can be used in addition to the shell, and the internal gears and shafts have to be replaced almost all. ”

"!" Hearing this conclusion, Wang Dazhi couldn't help but burst into a foul mouth: "This is no different from making a new fuselage, right?"

If COMAC wants to take on this burden, it is also a large expense to order various special fixtures and measuring tools.

"There really is no difference, and if you insist on repairing it, the price will be very high," Viktor Vladimirovich Kapaja nodded affirmatively: "If our group is preparing according to the standard of 'completely and thoroughly repairing these helicopters', after all the preparations are completed, we will have the ability to manufacture the fuselage and final drive of the 'aerial crane'." ”

Why is the price of the repair very high?

Because if you want to produce those parts, you need to customize special tools, fixtures and measuring tools and other equipment, and produce a set of replacement fuselage components to make him, and it is also wrapped around 100 sets of parts, that is to say, the more the number of production, the thinner the cost of these special tools will be evenly shared, but if only the dozen or so "aerial cranes" are repaired, these costs can only be evenly distributed on the dozens of "aerial cranes".

Hearing Viktor Vladimirovich Kapaya say this, Wang Dazhi immediately asked: "In other words, these helicopters no longer have the value of repair?"

"Yes, that's what I told you guys," said Viktor Vladimirovich Kapaja, "and I told them that it would be better for them to use these helicopters for another two years and then simply decommission them." ”

That's right......

Wang Dazhi groaned, and after a moment, he asked Viktor Vladimirovich Kapaya: "After you say this, what is the reaction of the comrades in the army?"

"They were a little disappointed, but they didn't say anything," said Viktor Vladimilovich Kapaja, "but our comrades told me that after listening to my presentation, they didn't seem to believe in my analysis, and they were going to find someone else to analyze it." ”

Wang Dazhi nodded.

The reaction of the troops is normal, and if you say that this batch of aircraft is unusable and no longer has the value of repair, it will really not be repaired, and they will inevitably ask other domestic expert teams to evaluate this batch of aircraft.

Although the economy of China in this era has improved a lot, it has only improved, and there is still a considerable distance from "not bad money." The spirit of arduous struggle of "three years in the new, three years in the old, and another three years in patchwork and mending" is still rooted in every corner of the troops, but as long as it can continue to be used, everyone is reluctant to discard it.

He didn't make a decision right away, and in fact he couldn't have made a decision right away, and after sending Viktor Vladimirovich Kapaya away, Wang Dazhi decided to listen to Chen Geng's opinion.

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