Chapter 1328 Feedback from the Navy

“Americans themselves don’t know…”

This statement suddenly made Zheng Liangqun excited——

It's not just the simple excitement of having the chance to surpass one's opponent, but it's also mixed with some...satisfaction of personal curiosity.

"So... when will the results be available?"

Although reason told him that something that looked quite complicated at first glance would take some time, reason did not work in all situations.

Especially when there is such a special relationship between the two people.

In short, it's very urgent.

I can’t wait to see the Americans’ trump card (pants).

Chang Haonan had just finished arranging the work. He glanced at Zheng Liangqun, who looked eager, and replied:

"It depends mainly on the level of research by Americans..."

As he spoke, he checked the handover documents on the desk again and signed:

"If the design itself meets the aerodynamic principles under hypersonic conditions, and the failure of the flight test is caused by substandard production quality or other problems, then only a dozen or even fewer rounds of testing will be required to complete it."

"And if there is a problem in the design of the scramjet engine... it's hard to say. We need to start with the theory of complex heating pipe flow calculations to verify the effects of mass addition, heat addition and wall friction on the airflow, and then test each abnormal point to verify the adverse effects they each have in flight..."

"If I'm lucky, I might be able to find the key problem right away. If I'm unlucky, I might not be able to determine the result for several months..."

In fact, these words are quite Versailles.

After all, even the Americans themselves, who had almost all the first-hand test information, only said that they would set up two separate fault tree analysis teams and strive to give an investigation conclusion before the end of 2007.

That is a window of about eight months.

But for Chang Haonan, it only took several months if he had "bad luck".

However, Zheng Liangqun obviously couldn't think it through in such a short time, and just showed a look of confusion:

"Just based on that small piece of debris just now, you can analyze so many things?"

Obviously, he regarded the variables that Chang Haonan just listed as different contents.

"Uh……"

The latter helplessly held his forehead:

"In fact, these are the same thing, but the intermediate processes need to be verified separately... Anyway, it happens that the wind tunnel has not been used very frequently recently, so I will do it as soon as possible."

After he finished speaking, he glanced at the wind tunnels winding like a giant dragon outside the window:

"And to be honest, although I was the one who came up with the idea of ​​using a nuclear submarine to monitor flight data, it was such a coincidence that we were able to directly salvage a part of the wreckage, and such a critical part at that. We didn't have time to make any preparations."

Speaking of this, Zheng Liangqun instantly regained his spirits:

"Well... not only you, but also the navy, including the superiors, didn't expect it."

Having said this, he suddenly stopped talking and looked around.

Obviously, the following content cannot be heard by too many people even in the highly confidential Huairou Science City.

Chang Haonan immediately understood and took Zheng Liangqun to his office in Science City.

The staff of the High Temperature Gas Dynamics Laboratory have now reached near-perfection in the application of the JF14 wind tunnel. Unless the test subjects are particularly important or have never been conducted before, they can be completely entrusted to Jiang Zongli and others for execution.

Besides, Chang Haonan was indeed a little curious about what had happened during the nearly one month that the fleet was at sea.

"I heard from the comrades in the navy that they accidentally carried out an unprecedented submarine coordination..."

After closing the door and sitting down, Zheng Liangqun spoke again:

"After detecting the disintegration of X51A, two American destroyers and an aircraft immediately turned to the sea area where the incident occurred. In particular, the aircraft was on the same platform as the P3C, so the fleet commander thought that a submarine had been discovered. He sent out No. 171 to delay the attack desperately. At the same time, the Long March 9 sailed underwater for several hours at a high speed of nearly 20 knots, gaining an extra long window of time..."

In fact, the situation at the scene was not very thrilling. After leaving the fleet, the 171 Coconut City ship quickly determined from the flight movements of the other aircraft that it was not an anti-submarine patrol aircraft. However, due to the aircraft's range, the Long March 9 actually had plenty of time to complete the search and salvage.

But now we are not writing a task report, and as the narrator, Zheng Liangqun can't help but describe the plot in a more exciting way.

Chang Haonan was of course aware that this part of the content could not be fully believed, and he was interested in other things and would not be easily influenced by exaggerations.

"After the hypersonic vehicle disintegrated, the scattered area was a large area. Even if there was a window of several hours, it would probably be difficult to conduct a complete search, right?"

"And the object is not small in size. It is not convenient for a submarine to surface for a long time in the sensitive area where the accident occurred. How did they salvage it?"

"..."

Afterwards, Zheng Liangqun spent about twenty minutes explaining to Chang Haonan how the captain determined the location of the suspicious echo signal by detonating a small mine, and how he used the UUV and frogmen to transfer the debris back into the submarine.

The whole process is quite exciting. If it weren't for the confidentiality factor, it would probably be enough to make several submarine-themed blockbuster movies.

"The Long March 9 did a great job this time. Not only did it successfully complete the mission, it also proved that nuclear submarine forces have great potential for non-combat operations in addition to strategic deterrence... However, the 09IV is a strategic nuclear submarine after all. It's okay now, but if it enters duty in the future, it can't always withdraw the missiles..."

For Zheng Liangqun, an air force officer, to give such high praise, it seems that the military must have a very high evaluation of this operation.

It may even affect the distribution pattern of military resources.

Moreover, Chang Haonan also heard the hidden meaning in the other party's words:

"So the Navy wants to ... give the attack submarines more functionality?"

Although he has not directly participated in the research and development of underwater equipment, the new generation of nuclear submarines is closely related to a series of achievements he has made in theory and engineering.

In particular, the package of cooperation projects with the Nuclear Industry Group in recent years have effectively improved China's basic research level in the field of nuclear energy utilization.

Therefore, Chang Haonan is not completely ignorant of all this.

The 09III is a fairly pure attack nuclear submarine, not equipped with any tricks other than torpedo tubes.

A somewhat counterintuitive fact is that for a submarine, concentrating all weapons in the bow torpedo compartment is the most space-saving design solution. Other equipment, including the onboard vertical launch system, will reduce the loading capacity of conventional weapons.

This is often particularly important for a smaller model.

"Well...it's not just versatility..."

Zheng Liangqun replied:

"According to the feedback from this mission and the report submitted by the crew, the functionality can be supplemented by external UUV and other equipment. What the submarine itself needs more is a higher silent underwater speed, stronger underwater maneuverability, and preferably a certain communication capability..."

At the end, he even laughed:

"Of course, some of the content here may not be realistic, especially the part about underwater communications, but it is still a direction to work towards... In addition, if you are interested in the details, I can ask the Navy Headquarters to send you a copy of the report..."

Chang Haonan currently has two major projects on hand, and is not prepared to get involved in new areas for the time being. He just waved his hand and answered casually:

"In fact, underwater communication... especially short- and medium-distance communication is not particularly unrealistic. In comparison, the speed part is more troublesome."

Zheng Liangqun raised his eyebrows when he heard this, and secretly began to concentrate his attention, preparing to write down what the other party said next.

"Based on the current theory of fluid mechanics, unless a completely new form of propulsion is used, it will be difficult to achieve any major breakthroughs in silent speed..."

"Even pump-jet propulsion won't work?"

he asked with some confusion.

Chang Haonan shook his head and organized his words slightly:

"In fact, compared with traditional large-blade propellers, pump-jet propulsion is more advantageous in the low and medium speed range... Due to the reduction in propulsion efficiency in high-speed environments, higher speeds and turbine power are often required, which may not be worth the cost. You can see that the current models using pump-jet propulsion are indeed not good at speed... and it is also easy to calculate..."

Seeing that he was about to use his ultimate move again, Zheng Liangqun quickly stopped him:

"I believe this conclusion, so there is no need to calculate."

Then quickly changed the subject:

"So, do you have any ideas on the technical route?"

"That's not the case for now..."

Although he said so, Zheng Liangqun noticed that the other person's eyes moved slightly a few times.

I'm afraid it's not that I don't have ideas, it's just that they are not mature enough.