With this innovative idea, Duke soon saw the results of the verification prototype one month later.

"Dean Du, this is the prototype of the submarine maritime communication node studied by Institute 705," Professor Zhao Jiefeng, chief engineer of the Communication Node Sub-project Group, took several "big fish" and found Duke happily. "The comrades from Institute 705 designed the shape of this communication node into the appearance of a mackerel. The appearance is more concealed. When it is a few meters underwater, it is not easy to distinguish the authenticity from the outside."

Obviously, Professor Zhao Jiefeng is quite satisfied with the results of his project team, and he then briefly described the performance of this type of fish.

"Now each type of fish is about 2 meters and 50, with a full power of about 200W. It can achieve 0 to 5 meters of diving and 1 to 3 knots per hour. Inside the type of fish, at least 25 kilograms of equipment can be loaded. Currently, our prototype is equipped with a Golden Dragon GD-10 battery and a set of ST-10 communication relay nodes, which now only uses less than 18 kilograms of load. In terms of the remaining space and equipment volume, we install a monitoring system so that it can monitor active sonar or radar searches within a certain distance, and then take self-protection measures such as active communication shutdown and diving avoidance based on this information."

The Golden Dragon GD-10 battery mentioned by Professor Zhao Jiefeng is the internal code of the high-energy battery invented by the Duke Robot Project. Now the battery R&D team is listed as a sub-project code-named Golden Dragon under the Qianlong Project. Its main research directions are two. The first is to work hard to improve the problem of the original model's low-temperature working performance degradation too quickly;

The second aspect is that the project team needs to study new production processes. On the one hand, it is to see if it can effectively reduce production costs. On the other hand, it is to produce different models of various weights, such as 50 kg or 100 kg large-capacity battery cells. These are used as submarine battery pack replacements. In addition, some battery cells below 10 kg are also needed to be produced, which are prepared for small equipment such as field independent communication nodes or monitoring nodes.

The model that was set as the Golden Dragon GD-10 is the original 10-kg 12KWh battery cell test sample of the project team. Currently, this battery cell is used to support the mechanical fish with an existing power of about 200W brought by Professor Zhao Jiefeng, which is theoretically enough to support 60 hours of work under full load. If the power drive of the model fish is turned off and the communication relay function is only activated, it can support more than 200 hours.

This performance parameter is very close to actual combat requirements.

"The 705 moves very quickly." Duke was also a little excited when he heard the good news. His new idea realized a prototype so quickly, indicating that the direction he proposed was right. 705, so he specialized in researching torpedoes. This time, he was responsible for the research on communication node carriers. They quickly came up with their own results according to the requirements and realized a mechanical mackerel that looked a bit obese. He only installed a set of micro motor drivers on the tail to make this type of fish mobility.

Duke has always attached great importance to the core components of the entire transformation project. Today, when they saw their results, they wanted to test it on the spot. "Professor Yang, have the things been shipped here? Can we do a test today?" Duke asked.

"The things have been shipped here. This morning, we have arrived at the DSM base by air. As long as we find a reservoir with a suitable area, we can start field testing. Let's see their current functions and what needs to be added in the future. This is the core equipment of our Qianlong plan, and we must not drag the project down."

"That's great. I'll look at Heilong Reservoir. The water area is relatively large, the water surface is relatively calm, and the water quality is very good. It's better for the invisible effect of the fish test model." Duke said that since the sea water may be very clear in the actual sea environment in the future, and visibility is not uncommon for the sea area of ​​about 4 or 5 meters, Duke hopes that the water area chosen for the first test will be as clear as possible. As a well-protected water source, Heilong Reservoir has more than 20 square kilometers of water, and visibility is almost the best near Rongcheng. When the weather is good, you can see fish at a depth of 2 or 3 meters. Although there is still a gap compared to some sea areas, it is enough to illustrate the problem.

"Okay, I'll let them prepare." Professor Yang Jiefeng replied readily. He was responsible for the project and was able to make progress first. Of course, he was very happy. If Duke, the general manager, can pass the test, the project milestone will be over.

DSM is now a key enterprise in military research and development in China, and has great influence in both local and military areas. With Yang Jiefeng's words, the relevant departments at the Heilong Reservoir immediately started to clear the field near the test waters, mobilized police and armed police to guard the key areas, and Duke's security team also dispatched in advance to control the commanding heights where Duke would go to.

This set of procedures is simple, but it is a lot of busyness when I get down to it. Fortunately, today is not a weekend, and there are not many tourists going to Heilong Reservoir to visit, so before Duke and the others came, they had already been cleared by local police and armed police.

Duke, Yu Deming and others came to a small island in the Heilong Reservoir area and temporarily established a test command center.

Professor Zhao Jiefeng brought several researchers from the Institute of 705 and a group of armed police soldiers to prepare for various tests. The engineers from the Institute of 705 brought aircraft fish and asked the armed police soldiers to drive assault boats to put four aircraft fish into different areas of the reservoir. Then, the armed police soldiers drove the boat to follow the shooting of the movement of aircraft fish, and passed the test screen to the monitoring system monitor of the temporary command center in real time.

Duke and Professor Yu Deming watched the aircraft-type fish enter the water, and their whole body was almost submerged in the water. The dark back was almost merged with the clear water surface. If you don’t look closely, even if you haven’t dived and half-floated on the reservoir water surface, you can only vaguely see that it is a "big fish", and it is not easy to tell that the "big fish" is fake. This kind of indistinguishable true and false is naturally a huge trouble for the search party.

"The invisibility effect is good," Duke praised, looking at the image uploaded on the monitor, "They are really not very different from fish when putting them in the water. However, have you considered customizing them in different seas according to the main local fish? For example, if someone is experienced in the main fish in the water, it is inevitable to feel suspicious when seeing such a large mackerel here."

"We have never thought about this yet. President Du's instructions are very timely. Now we will study the distribution characteristics of fish in my country and the nearby western Pacific waters of submarine operations, and develop different mechanical fish for these local waters." An engineer at 705 accompanied by Duke responded in a hint of surprise.

"Not only the domestic waters of our country, but all major waters in the world must be considered." Professor Yu Deming added, "Our submarine force will not be limited to nearby waters in the future." As a leading expert in domestic submarine communications, Professor Yu Deming naturally has a good understanding of the navy's strategy. With the advent of the attack-type 097-class nuclear submarine, the PLA submarine force will be the first to achieve global combat capabilities. Professor Yu Deming did not believe that the current new communication method is for the 039 and Kilo-class submarines. If the technology is mature, it can be used on all submarines in the future.

"Let's see how the movement performance of these types of fish are," Professor Yu Deming finished speaking, and said to Professor Zhao Jiefeng next to him. "In order to better protect these communication nodes, it is also important to make these communication nodes have self-mobile capabilities."

Zhao Jiefeng said a few words to the engineers of the 705 Institute around him, but he moved a few times on the monitoring system. Soon, Duke and Professor Yu Deming saw that waves began to appear on the calm lake. After the aircraft started the power unit remotely, they slowly accelerated. Later, they drew white tracks on the calm lake, showing good speed.

Duke looked at the surveillance image and nodded, "The speed seems to be good. In fact, a target as small as a aircraft type fish can move a few hundred meters at critical moments, so it can avoid enemy searches well. I think if a monitoring mechanism is installed on the mechanical fish in the future and the enemy can discover the enemy's search operations a little earlier, then the communication will be closed in time and move a few hundred meters away, and it will be difficult for the enemy to discover it."

After testing the navigation speed, the engineers of the 705 Institute demonstrated the diving function of the aircraft type fish. On this small mechanical fish, the engineers of the 705 Institute specially designed a ballast water tank for diving. As the lake water was injected into the ballast water tank of the mechanical fish, the mechanical fish began to dive slowly. Judging from the images taken by the surveillance camera on the water surface, when the mechanical fish dived more than 3 meters, there was basically no trace of the mechanical fish.

"Director Du, it seems that at a distance of 3 meters, mechanical fish can maintain a good visible light invisibility effect. Even if the sea water in some sea areas is more transparent than lake water, the aircraft fish should be vaguely visible after diving to a depth of 5 meters. For the vast ocean, it is easy to imagine how difficult it is to find such a vaguely visible aircraft fish." Professor Yu Deming, who was watching the live broadcast of the camera, saw that there was no trace on the screen after diving in the mechanical fish, said to Duke next to him with satisfaction.

"Well, this stealth effect is indeed good. On the small fuselage here, once we turn off the drive device and communication, the enemy wants to find it within a few kilometers, which is equivalent to finding a needle in the sea. But I don't know how much bandwidth our communication node can maintain in this situation for communication? The attenuation of electromagnetic waves in water is too great. If the communication performance loss is too large and it cannot provide bandwidth of more than 10M, the theater joint combat tactical system will not work effectively." Duke said.

"Dean Du, we have tested it before. When the water depth is 3 meters, the number of nodes of the aircraft fish can still maintain a rate of more than 10M." The engineers from 705 nearby explained when they heard Duke's words, while operating the aircraft fish to prepare for data propagation speed test.

Sure enough, judging from the data test situation from the monitoring real-time screen, the data transmission between the aircraft fish at a depth of 3 meters is stable above 10M, and sometimes even reaches 15M.

Looking at this result, Duke and Professor Yu Deming finally felt relieved. Through this field test, Duke's new concept was basically verified that it is extremely feasible. Next, the project team only needs to implement a high-reliability system for the actual combat environment.

This "fish" communication system, which later became the main communication method of submarines, began to enter the track of rapid development from today. Duke and Yu Deming no longer doubt the success of the entire Secret Dragon Plan.
Chapter completed!