The military-industrial scientific research system of the academic master.

Chang Haonan's loud words made the entire negotiation venue quiet down instantly.

In fact, before this negotiation, the Chinese side did not know the specific reason why the European side suddenly came to cooperate, so there was no way to prepare in advance. It could only call in relevant technical personnel to show them how to deal with it.

Therefore, except for Huai Guomo, who had just seen the note, and Lin Guofan, who had participated in the research, everyone showed expressions of disbelief for a moment.

People here in China don’t know that they are so awesome.

Even the recorders on both sides had trouble deciding how to record this content, so they had no choice but to raise their heads and look at the speaker who seemed to be "talking wildly".

The European delegation on the opposite side quickly started discussing among themselves after a brief moment of silence.

One of them, an old man with silver hair and glasses, stared at Chang Haonan for a while before asking.

"I'm sorry, I need to confirm again. When you talk about SLD conditions, do you mean supercooled droplets with millimeter-scale particle sizes?"

This person also looks like a technician, mainly because his eyes do have the look of a mad scientist after seeing a research subject.

"Of course, and I can reveal some more precise information here."

Chang Haonan, who had already expected to face similar questions, nodded and replied almost without thinking:

"Specifically, we have conducted theoretical and engineering studies on the phenomenon of large-scale droplets ranging from 400 microns to 1 millimeter in size impacting solid surfaces at high speeds."

"The current results show that the icing mechanism of large-scale droplets is very different from that of ordinary droplets below 100 microns studied in the past. Some basic assumptions in the past, such as 'the water droplet impact process does not produce thermal motion' are not valid under SLD conditions. Therefore, it is necessary to create a new set of research methods and even a theoretical system."

After hearing what Chang Haonan said, the white-haired old man obviously became more excited:

"Then what method did you use to explain the mechanism of the impact of typical critical ice shapes on changes in the aerodynamic performance of airfoils? In addition, from the perspective of airworthiness and safety, is there any method to evaluate the specific aerodynamic characteristics of airfoils after icing..."

"Cough-cough-"

Before the series of questions could be finished, he was interrupted by a slight cough.

To be able to ask such a question at the negotiation site is simply outrageous.

Chang Haonan narrowed his eyes slightly and glanced at the name tag in front of the other party——

Fernando Lorenzo.

Chang Haonan vaguely remembered that he had read a paper written by this person in his previous life, but he could not remember what it was about.

"Mr. Lorenzo, I think I need to remind you that this is not an academic seminar, but a negotiation site. If you are really interested in these issues, then I will be happy to talk to you after an agreement between us is reached. Your technical staff share these findings.”

The few words just revealed are just to convince the European delegation that China has really studied the SLD icing problem.

Judging from the other party's reaction, there is no doubt that the goal has been achieved.

Then of course he couldn't reveal any more information.

When Chang Haonan said this, Lorenzo also realized that the situation was not right and showed a somewhat embarrassed expression.

However, as the delegation's technical advisor, he did not have decision-making power, so he turned to look at Rosie Colombo and Anne Valette sitting in the middle with questioning eyes.

Although Aerospace France and Airbus also sent representatives to participate in this negotiation, as peers and competitors of China Airlines to a certain extent, they were obviously not as good as Finmeccanica and JAA in this negotiation based on cooperation. The two people play a greater role, so these two people are considered the core members of the delegation.

However, even for Colombo, who has participated in the entire MA60 icing test, the amount of information he came into contact with tonight was indeed a bit too much.

If what the Chinese said is true, then their research in the field of icing and anti-icing has even reached the front of the Americans.

They had never thought about rebelling against General Yijun before, and were naturally unprepared for the relevant negotiation conditions.

Moreover, neither Colombo nor Valette are full-time technicians. They only have some understanding of SLD-related fields, and they cannot make decisions on the spot.

So the two looked at each other and saw the same meaning in each other's eyes.

"As for the idea just put forward by your delegation, we need to report it to the European headquarters, and we are unable to give an accurate answer for the time being."

After being shocked by Chang Haonan's blow to the head, Valette's tone was no longer as sonorous and powerful as it was at the beginning.

Her speech means she is ready to end this round of negotiations.

Considering that the things that the two sides want to discuss are no longer on the same level, and China also needs to confirm some technical details with Chang Haonan and Lin Guofan, this is actually the only way out.

It's just a matter of seeing which side can't hold back first in the end.

It is naturally best for Europe to take the initiative now.

So the first round of negotiations came to an end.

Then of course there was the dinner party that had been arranged long ago.

Although after determining the reason for the other party's request for cooperation, Huai Guomo and others had many questions to consult Chang Haonan and Lin Guofan, but they still had to complete the necessary procedures.

During the dinner, in addition to his old acquaintance Colombo, Chang Haonan also chatted with Fernando Lorenzo and learned that the other person was a professor from the National School of Roads and Bridges in Paris, and his research direction was fracture mechanics and fluid mechanics.

French universities are relatively casual in their naming. Although this National Road and Bridge School sounds like a junior college, it is actually one of the top 100 science and engineering universities in the world. In the 90s, it was better than all schools in mainland China. The rankings are all high.

"Chang, have you, China, already built an icing wind tunnel like NASA's?"

Lorenzo is obviously still very interested in the research Chang Haonan just mentioned.

"Professor Lorenzo, icing wind tunnels like the Lewis Center are indeed important, but their main role is still focused on testing the aerodynamic characteristics of the airfoil after icing. The research we are currently conducting is more basic and is based on past experience. The process begins when cold droplets hit the surface, deducing the entire process of ice formation."

Chang Haonan held up the wine glass filled with white grape juice with one hand, and made several gestures in mid-air with the other hand:

“Limited by the current wind tunnel technology, the influencing parameters that can be obtained by the experiment, the scope of the experiment, and the versatility of the research methods are all limited. Therefore, in this field, we mainly rely on computational fluid dynamics technology for numerical analysis and key analysis. Conduct test flights under research conditions.”

"Fly the test directly after numerical calculation..."

Lorenzo looked incredulous:

"Wouldn't that be very dangerous?"

"It's really dangerous."

What the old professor didn't expect was that Chang Haonan admitted this point directly:

"So we will first select the most reliable working conditions for test flight. After verifying that the simulation results in this range are OK, we will gradually increase the severity of the test flight environment."

This series of answers was mixed with half truth and falsehood. Even if Lorenzo went to Colombo later for verification, he would not be able to tell anything fishy.

For example, they have actually only conducted test flights in a 100-micron-level supercooled droplet environment before, but the theory that Chang Haonan and Lin Guofan worked out before can indeed predict the icing situation under SLD conditions more accurately, but it requires some analysis. Theories and hypotheses are adjusted.

The reason why I didn't go on a test flight is that SLD actually has a very extreme climate, and it's basically a once-in-a-century climate in China.

It is not impossible to adapt the aircraft to such conditions, but it requires all-round development from airfoils to skin materials to anti-icing devices. The cost is extremely high and it also affects the performance of the aircraft. It is really better to strengthen the level of weather detection. Once this kind of weather is discovered, the flight will be grounded directly——

In fact, this is also the common method in later generations.

But now that the FAA wants to use SLD as a bargaining chip 15 years in advance, Chang Haonan doesn't mind giving them a little Eastern shock.