After several inspections to confirm that the parameters of the transmission system were calibrated correctly, the relevant design scheme was quickly sent to the R&D center of Eurocopter headquarters in the southern French city of Marseille in the form of human delivery.

Of course, the huge amount of design documents and related drawings, even after they have been digitized, cannot be carried by one person with a bag.

What's more, this kind of business trip abroad also has to consider confidentiality and security issues.

Therefore, Bingfei Group directly sent a delegation out.

The team leader is Wang Xibo, deputy director of the design office of the 602 Institute responsible for the research and development of helicopter avionics systems.

Compared with fixed-wing, the avionics system, especially when it comes to flight control, is much more complex than the one in the flight, because the helicopter has one more control axis in flight.

On the other hand, helicopters, with the exception of some special models, are practically not considered "high-value materiel" in the troop establishment sequence.

A transport helicopter is the equivalent of a flying truck, while a gunship is the equivalent of a flying tank or infantry fighting vehicle.

The loss tolerance for helicopters is also much higher than for fixed-wing aircraft.

This means that the cost is very stuck.

The combination of the two reasons led to the fact that until the end of the 90s, the vast majority of helicopters on the market were still using the traditional hydraulic flight control system, which had a lot of hidden dangers in terms of safety and reaction speed.

And the NH90, which was the first to eat crabs, tried to use fly-by-wire flight control on helicopters, and only used the hydraulic system as a backup.

In fact, the first two prototypes that have been put into test flights, although there are many problems, have been relatively successful in the verification at the flight control level.

This is another reason why Bingfei Group chose to send Wang Xibo to lead the team to France-

With the opportunity of the Z-12 project, get acquainted with the design logic of the helicopter fly-by-wire flight control.

Don't ask, asking is independent research and development, asking is to look at NH90 looks good, and turn around and build a similar look.

Similar to the situation when Le Maire went to China last time, Eurocopter also sent a special team to greet Wang Xibo and his party who sent the materials.

It's just that Le Maire himself is based in Paris, and he is no longer from Eurocopter, so this time it was Pierre, who is currently in charge of the NH90 project.

"Hello, it's nice to see you again so soon."

The leaders of both sides shook hands, and Pierre also patted Wang Xibo on the shoulder enthusiastically.

In fact, it was a bit surprising that Bingfei Group was able to come up with a complete drivetrain solution in such a short period of time (strictly speaking, there are actually two sets and AS365).

But if you think about it, at the time of the negotiations, the Chinese said that they thought that their Eurocopter Group's design route for the drivetrain was flawed.

That is, the problem of methodology.

And this kind of problem is indeed difficult for those who will not, and it is not difficult for those who will know.

The more you do the wrong route, the more you make mistakes, and on the right route, you may get all the way unimpeded.

Therefore, after thinking about the rationalization of ideas, Pierre feels that Huaxia is doing this, but it seems more real.

Of course, there will be such a strange brain circuit, largely because he has been a little exhausted by this project recently.

"Help each other, and hope that our cooperation will go well."

After a few rounds of unnutritious greetings, the group got into several buses in the convoy.

Wang Xibo is also going abroad for the first time, just like Le Maire, who was in China for the first time, and he also observes the street scene outside the window intentionally or unintentionally.

Before landing in Marseille, he actually had some expectations and fantasies about the social situation in France, a developed European country.

And now in the middle of it, as the largest city in the south of France, the prosperity of Marseille is indeed something he has never seen before.

Wang Xibo sighed that it was worthy of being an old developed country, and at the same time, he also thought with a little envy that he wondered if China's big cities would one day be able to build to this level.

However, before he could finish his emotion, he noticed a commotion on the sidewalk outside the window.

It seems that someone grabbed something and then ran away, and someone was chasing after him, causing the people around him to turn on their backs.

“……”

Seeing this scene, Wang Xibo was stunned at first, then smiled self-deprecatingly at what he had just thought, and finally leaned his head back on the seat pillow and closed his eyes to recuperate.

As the convoy moved from city to city, the crowd soon arrived at Eurocopter headquarters on the outskirts of Marseille.

"Mr. Wang, please."

Under the guidance of Pierre, the group got off the bus one after another and walked into the company park where there was no edge in sight.

Compared with the urban area just outside the golden jade, although the liveliness here is much worse, the surrounding beautiful natural environment, coupled with the sense of science and technology of the building, is more like the future city of a developed country.

Not to mention anything else, the building of this institute alone is not much more spectacular than that of the 602 Institute.

For the technicians who came on this trip, this is a place that is more enviable than the bright lights of the city.

"This TM has the fan of a research institution......"

Wang Xibo rubbed his nose and secretly made up his mind in his heart:

"When the group has money in the future, it will have to clean up the environment in the compound......"

Thinking like this, of course, he couldn't show anything anymore, so he had already entered the R&D center with his brain running rapidly.

The design data for the NH90 helicopter drive system is a hard drive housed in several lockboxes.

There is no paper one.

As for why not use a bigger suitcase......

Because large baggage has to be checked in, and this process is obviously very risky.

Whether it's the risk of leaking information, or the risk of equipment being damaged by brute force shipping.

Eurocopter has already arranged the handover ceremony.

A bilingual banner with white on a blue background hangs directly above the lobby of the R&D center, with a row of tables and chairs below, and a promotional board at the back.

Low-key is low-key, but the process that should be followed must not be less.

After a brief opening session, Wang Xibo and Pierre signed their names under the document, and at the same time symbolically handed over their lockbox to each other-

Under the agreement, Eurocopter will provide design data for the helicopter avionics system.

In addition, Wang Xibo and others will work here with their European counterparts for a period of time.

The ostensible reason is that since they are already in-depth cooperation, it is certainly not enough to just exchange design data, and it is necessary to leave people to exchange some experience.

And the deep-seated reason, which even Wang Xibo himself is not completely clear, is that Chang Haonan needs to have people from China in France during this time.

The first is to transmit the situation back to China in real time, so that he can be ready to deal with it at any time.

Second, once the two prototypes failed during the test, it would be better to have one of their own people present at the first time and put the black pot firmly on the head of the NSK Group.

Therefore, after completing the data handover ceremony, Wang Xibo divided his group into two teams, one team to inspect the avionics design of NH90, and the other team was responsible for explaining the design of the transmission system to Eurocopter Group's technicians.

Pierre had wondered if he should arrange a dinner party to reflect their old European temperament and save him from embarrassment, but seeing that his Chinese counterparts were so eager to get into their work, he put the matter aside.

After all, he himself was in a hurry.

The two NH90 prototypes are currently grounded, and the design team has been tough on revising the cooperation plan with several partner countries, and the pressure is not small.

Fortunately, the materials are all digitized and sorted out in advance, which saves both sides a lot of non-technical trouble.

"Huaxia's peers are very sincere......"

Pierre stared at the computer screen in front of him and sighed in his heart:

"Look at this neat classification, it is completely for the sake of our efficiency, handing over the materials in the morning, and we can start work in the afternoon of the same day......"

Of course, he didn't know that this was because Chang Haonan was afraid that the efficiency of their French would be too low, which would affect his own plan, and it would only be a gesture of goodwill from Huaxia.

……

As a professional, his team only spent about a week reading the overall design plan, and found that there was a huge difference between the design provided by Huaxia and his old plan.

"It turned out to be a compatible ...... between two engines with different performance by designing here"

"There is also the transmission part of the tail rotor, the power distribution is a lot more reasonable, and the transmission loss may be as low as 5%......"

"With such a narrow optimization range, can they really find the best design point?"

"It seems that Huaxia has a very rich talent pool in the field of multi-objective optimization......"

“……”

Of course, just like a person who has just seen the answer to a complex exercise, although he can understand it, it will take a certain amount of time and even the guidance of others to truly understand it and integrate it for his own use.

"Mr. Wang, I think there are some parts with strange performance calibration in this design plan......

After the initial shock, Pierre soon discovered several parts of OCD that made it more uncomfortable.

Not only is it a matter of mental crit, but the large number of previously unused parts and components means that they may have to seek out a new batch of suppliers before moving into mass production.

"This is also a helpless thing, the performance characteristics of the two engines you plan to choose are very different, and it is very difficult to find such an optimization point now, especially the bearing group of the final drive you just mentioned, a little deviation, can not leave enough safety margin."

Wang Xibo's answer was flawless, because he himself thought so.

"Okay, then I have to let the marketing department go and connect with the supplier again......"

Hearing Wang Xibo say this, Pierre could only admit it.

It's better to be able to solve it than not to be able to solve it.

It's really not good, and you can even consider finding a bearing company to customize a batch of products.

In that case, the lead time will be very long.

However, the reality seems to be much smoother than Pierre had imagined.

On the evening after he assigned the task to the marketing department, he received a call back from the other party:

"Pierre, we ...... the new parts you asked to connect with the supplier. Found in stock. ”

"Spot?"

For a moment, Pierre felt that perhaps he was favored by God, and even his voice trembled a little:

"Do the parameters meet the requirements? This time, the standard is very strict, and there can be no mistakes. ”

"Exactly what it looks like."

The man on the other end of the line replied:

"And...... If it weren't for the fact that there were only a few hours in between, I would have thought that this bearing was specially customized by someone, which was exactly the same as the request you sent in the afternoon. ”

"So, which company is going to offer the product right away?"

"NSK Group, a Japanese company."

Pierre was silent for a few seconds.

He also felt that it was a bit too coincidental.

But even with a lifetime of imagination, I really couldn't think of anything other than coincidence, so I had to put the earpiece to my ear again:

"Get in touch with them, as soon as possible!"

(End of chapter)