The ocean-going carrier has been sailing all night and is already more than 700 kilometers away from the IJN.

Mu Feng slept until nine o'clock in the morning before getting up to eat.

Today's command ship is Shenzhen, and the secretary ship is Xiao Sixteen.

So the two of them had already finished eating, but now they were still waiting for Mu Feng in the restaurant.

While eating, Mu Feng looked up at the two of them:

"After eating, let's go to my room together......"

Shenzhen was a little lazy and pulled his hair: "Does the commander have any plans?" ”

Xiao Sixteen put his hand on his cheek and looked at the wall: "Stupid commander, what do you want to do?" ”

Mu Feng smiled and said: "Little Sixteen's hull, I have almost studied it, and it is almost ready for the second transformation, and there are just two new technologies that can be used." ”

When I was a child, my eyes flickered for a moment, and then I immediately pouted and said:

"What's that? I'm not interested in ...... anyway."

Shenzhen smiled when he saw this, didn't speak, and when Mu Feng finished eating, he dragged the seemingly reluctant little sixteen and followed Mu Feng to the room.

Let Xiao Sixteen lie down on the bed, Mu Feng enters the system, finds Xiao Sixteen's hull data, and begins to make a slightly larger modification.

The main improvement is the application of the mature integrated all-electric system, and then the original ordinary propeller is replaced with a shaftless pump jet propulsion system.

After applying these two technologies, the diving noise of Little 16 will be further reduced, and the silent speed can be further improved.

Then the internal compartment structure was adjusted, and the cabin originally reserved for human crew was reduced, and the reserve of spare torpedoes and missiles was increased.

It does not yet have a submarine-launched vertical launch system, and cruise missiles can only be fired from torpedo tubes for the time being.

After all the transformation plans are confirmed, let the system check that there are no problems, and finally select Confirm.

Watching Xiao Sixteen go into hibernation, Mu Feng smiled and gently touched her pink little face.

After more than half an hour, Xiao Sixteen opened his eyes and sat up, looked at Mu Feng beside him for the first time, and instinctively opened his mouth and said:

"Commander, you didn't bully me while I was asleep, did you!"

Mu Feng immediately smiled and shook his head:

"No, of course there is no ......"

Then I added in my heart, I just pinched your little face, and that wasn't bullying you.

"Humph......"

Little Sixteen's expression was a little strange, and he couldn't tell whether he was happy or unhappy, and jumped out of bed:

"I'm going to sea trials, do you and Sister Shen want to follow?"

Mu Feng immediately raised his hand and said:

"Yes, of course!"

Xiao Sixteen pouted, did not speak, and went to the dock with a smiling Mu Feng and Shenzhen.

Xiao Sixteen unfolded her small submarine-like outfit, let Mu Feng and Shenzhen sit in it, and the thrusters started and drove out of the dock.

Little Sixteen mainly tests the silent speed, which is no more than 10 knots, and in order to prevent it from being thrown away, the mothership also reduces its speed.

There are basically two types of submarine noise, active noise and passive noise.

Active noise is the noise generated by the operation of the submarine's mechanical structure.

The natural circulation reactor and shaftless pump spray technology are both designed to reduce the active noise of submarines.

Basically, when these two technologies mature, the active noise level is basically at its limit.

Because there is almost no way to effectively reduce passive noise, no matter how low the active noise is, it is useless.

Passive noise is mainly the vortex noise generated by the friction between the submarine and the water current, as well as the cavitation effect noise caused by it.

The point is that the speed of this noise increase is directly proportional to the speed of the voyage to the third power.

In other words, at 8 knots, the intensity of this noise is 64 times higher than that at 2 knots.

Basically, after more than 10 knots, the vortex noise and cavitation effect noise have risen sharply, and the submarine can no longer effectively conceal itself and use its own sonar effectively.

Therefore, the limit of the submarine's silent diving speed is basically 9 knots.

Xiao Sixteen took Mu Feng and Shenzhen and ran in the sea for almost two hours, first a small submarine in the state of the ship, and then a nuclear submarine in the state of the hull.

Two hours later, the three of them returned to the mothership together to review the data recorded by the mothership's sonar.

The application of natural circulation reactor, shaftless pump injection technology, and integrated power system of Xiao 16, the silent speed has reached 9 knots.

This made Mu Feng and Xiao Sixteen very satisfied.

This is basically the limit, and it is very difficult to improve again.

The next step of optimization and transformation is no longer to be silent, but to design and install a vertical hair system for submarines to launch cruise missiles.

After checking the data, Mu Feng touched Xiao Sixteen's hair and took the two of them to the construction center.

Now I have 7 system cores and 65 normal cores in my hands, but I haven't built them for a long time.

After arriving in the Northern Islands, it should enter a busy period of time, and Mu Feng felt that he could almost resume his routine construction.

After arriving at the destination and making sufficient preparations, Mu Feng's mood was completely relaxed.

Standing in the construction container, he took a deep breath and took out a system core and put it in.

"Ship soul core detected...... Core dissolution ...... in progress

"Dissolution complete...... Identifying soul information ......"

"Identified successfully, a special ship equipment has been detected, and an additional auxiliary core is required, please build in the second soul core in 5 minutes.

"Otherwise, there will be a high probability that this construction will fail, and even if the construction is successful, there is a high probability that the born ship girl will not be able to summon normal ship equipment."

Mu Feng looked at these prompts full of visual sense, and his mouth opened involuntarily.

This ship girl needs two soul cores, one for the body and one for the ship.

This has only happened once before.

That's Little Sixteen.

The first core is the ship's body, and the second core is the ship's core, which is the control system of the nuclear reactor, responsible for converting nuclear fuel and coordinating the normal operation of the reactor.

That is, this one is also a nuclear-powered ship girl.

Among China's existing warships, only submarines are nuclear-powered for the time being, that is, this is its second nuclear submarine.

Mu Feng thought of this information, and his mood quickly rose.

The large aircraft carriers themselves already have two Liaoning and Guangdong, but the nuclear submarine has only 16 small people, and now there is finally a second one.

After a short period of stunnedness, Mu Feng immediately put in an ordinary core again.

"Waiting for the desired soul core in ......"

"Soul core detected, core dissolution ...... is underway"

"Rongjin succeeds...... Resources are being injected ......"

"Injecting resources into ......"

"Injecting resources into ......"

…………

"Injecting resources into ......"

"After the injection is completed, a total of 2,048 units of primordial matter and 2,048 units of active energy are consumed."

"Construction begins...... Estimated time 50 minutes! ”

Looking at these data, Mu Feng narrowed his eyes slightly, this is exactly the same as Xiao Sixteen, needless to say, it is also the same level ship as Xiao Sixteen, and it is also a Type 093B attack nuclear submarine.

"Wait......"

When Mu Feng thought of this, an idea suddenly rose in his heart.

When you play the ship girl game, you can build exactly the same ship girl, such as a group of Hood, a group of Kaohsiung, and a group of prestige.

If it is exactly the same time and consumption as Little Sixteen, it is possible that a second Little Sixteen will appear.

Two of the same ship mothers, they can live together, and they can also fight together in the state of ship girls.

However, it is not possible to hull at the same time.

This kind of thing is very common in the game, and the more ships you have, the more this situation will naturally be.

It probably won't happen to me.