Mu Feng used an ordinary core to build this time, and he didn't think too much about it, but he didn't expect a 40-minute countdown, which made Mu Feng overjoyed.

If 40 minutes is not long, it is not short, and waiting will make people more and more anxious.

Mu Feng stood in the construction center for a while, really couldn't guess what kind of ship it would be this time, and finally shook his head, went to the courtyard of the port area to take a turn, and by the way, took a look at the construction progress of the surrounding industrial facilities.

When he walked to the door of the apartment building, Mu Feng suddenly remembered a more important matter.

Richelieu and other French shipwives have all moved out, and now the First Military Port is inhabited by Mufeng's own shipwives.

I now have a total of 18 ship girls, plus 19 Yat-sen, 22 are not used to living alone, they are all two people in one room.

Finally, with the addition of myself, it now occupies a total of 17 rooms.

There were only 18 rooms in the apartment buildings of the First Military Port, and now the last one was empty.

After today's construction is completed, the new shipwreck will occupy the last room.

Mu Feng's own shipwives will also have a few working in the fortress area or France, but Mu Feng wants to reserve rooms for them all to ensure that they have their own place when they come back at any time.

If you want to continue this way, you need to expand the existing apartment building or build a new one.

When Mu Feng arranged a room for Kunlun that day, he felt that the current room was a bit small, because it was modified on the basis of a traditional old-fashioned building, and the upgrade potential was limited.

After a short period of thought, Mu Feng quickly decided to build a new one, and after the new apartment building was completed, he would demolish and rebuild the old apartment building that was too small.

Apartment buildings are standard buildings and do not need to be designed from scratch.

There are a lot of ready-made templates in the system, and the more advanced the choice, the more you can choose from, as well as custom systems.

It was also this custom system that made Mu Feng toss back and forth for a while, and finally formed a set of slab apartment buildings with relatively simple exterior shapes and the most complete and luxurious internal facilities.

On the first floor of the apartment is a large dining room, a movie screening room, a daily necessities store and other public facilities.

From the 2nd to the 9th floor, there are 12 apartments on each floor, for a total of 96 apartments of 80 square meters.

Because it is a Minato apartment, not a family house, there is no separate door opening, and all apartment doors open from the back, and there is a spacious public corridor behind the building.

All people go up and down the stairs via 3 elevators and 3 spacious public staircases, with a public semi-open lobby in front of the elevators.

The location of the new apartment building, Mu Feng chose the rear of the current apartment building, and extended the courtyard wall of the port area to the back, slightly away from the original apartment building to obtain good lighting.

When Mufeng confirmed all the information, he immediately arranged for a group of construction robots to pass through the fence of the port area and immediately break ground.

Steel, cement, and concrete, and now the automatic factories around the port area have been able to produce themselves, and they have a lot of reserves for a while, and what Mu Feng needs to do is wait.

It took some time to customize the apartment building, and after all the tossing was over, the 40-minute countdown was almost over, and Mu Feng immediately ran back to the construction center.

Mu Feng rubbed his hands and pressed the open button.

The massive metal hatch rises, and the white mist dissipates.

A girl who looked to be fifteen or sixteen years old, wearing a navy blue military uniform and short white hair, slowly opened one eye, revealing a red pupil.

After looking at Mu Feng, the girl slowly raised one hand to block the closed eyes, the corners of her mouth rose slightly, revealing a smile that she thought was very handsome:

"You're the commander of the Minato District, aren't you, do you feel the power of Sirius?"

"Forehead......" Mu Feng blinked, a little incredulous, "Are you ...... Sirius? ”

"That's right!" Sirius withdrew his hand and opened his other eye, "Type 815A Electronic Reconnaissance Vessel, Sirius, String 854, Commander, are you ready to meet me?" ”

Mu Feng finally confirmed the news, and the contract with Sirius was finally completed, his face and heart were already happy, and he directly stepped forward and hugged Sirius:

"Sirius is fantastic! You couldn't have come at the right time! ”

"Uh......" Sirius was stunned for a moment, his expression a little flustered, "That...... That one...... Commander, what are you going to do with Sirius? Want to be the headliner of tomorrow? ”

"Are you all paparazzi?" Mu Feng let go of Sirius angrily and funnily and rubbed her soft hair, "Commander, you're so happy!" Finally someone has Neptune to keep you company! ”

"Neptune? Oh my stupid sister! Sirius quickly regained his mysterious expression and tone, "I already feel her urgent call, so let's go meet her!" ”

"Okay." Mu Feng nodded in agreement and took Sirius to the scientific research center.

Although the Sirius string is 854, it seems to be behind Neptune's 852, but she is really a veritable sister.

The strings of the ships of the Chinese Navy are reusable, and with the exception of nuclear submarines, they are not arranged in order from small to large.

As an electronic reconnaissance ship, Sirius carried out a round-the-island reconnaissance of the Japanese mainland in 2016, and like Neptune, it was a top anchor on the scene.

Mu Feng took Sirius to the scientific research center, and Neptune, who had already received the news, jumped out directly and pounced on Sirius:

"Sister, you can count it on, the commander is oppressing child labor, do you know!"

Mu Feng immediately squirted: "Poof, I'm not, I don't, don't talk nonsense!" ”

Sirius had a thoughtful expression: "Uh-huh, then let's record this interesting story, write it into a press release, make it into a documentary, and broadcast it to the entire headquarters......"

Neptune immediately jumped up: "I'll write the script!" ”

Sirius smiled and said, "Then I'll be the director, and the commander and Neptune will play in your true colors." ”

Mu Feng went up and his two brains collapsed: "You two don't make trouble yet, let's get down to business, Neptune, how is the research progress of the electromagnetic cannon?" ”

Sirius's eyes lit up when he heard this, and he said with a smile, "It's an electromagnetic cannon, it's really interesting, let me help too!" ”

Neptune rubbed his forehead: "It's going to be good right away, the most critical energy storage, release equipment, and shell design have also been completed."

"Now it's some finishing work, if I am alone, I can do it tomorrow at most, and my sister can do it today if she comes to help."

Mu Feng rubbed Neptune's head: "Then you guys will finish the electromagnetic cannon today, and then rest tomorrow and the day after tomorrow, I'll take you sisters out to play together and help Sirius get familiar with the environment!" ”

"Good!" The two sisters agreed together, and Sirius directly opened another set of scientific research facilities to help Neptune sort out various research and development information.

The basic process of the scientific research workflow here is: setting goals, researching principles, proposing solutions, simulating and verifying, correcting according to the results, and finally producing the finished product.

If a problem is found at each node, it is repeatedly improved and corrected with the help of the scientific research system until the final product that meets the requirements can be made.

In fact, if I have to say, the process of scientific research on the earth is almost like this.

It's just that the earth does not have such an almost all-powerful scientific research equipment, and such a set of facilities can complete all the relevant scientific research work.

In addition to the research facilities, there is a huge advantage here, as research is hardly subject to production processes and material levels.

As long as the theory is correct and the scheme is correct, basically the normal and usable physical objects can be made.

Neptune's current research on electromagnetic guns is also being carried out in this way.

Many people have a common misconception about electromagnetic guns.

The power consumption of electromagnetic guns is not as terrible as most people think, such as "the electricity of a city", "only a nuclear power plant can supply", these are all blind obedience without thinking.

The exact amount of energy required for the shell can be known by a simple calculation of the kinetic energy formula.

For example, an ordinary 155-mm shell weighs about 50 kg.

According to the kinetic energy formula, accelerating a 50-kilogram shell to 5 times the speed of sound without taking into account energy losses requires about 72,250 kilojoules of energy, which is about 20 kilowatt-hours of electricity.

It is equivalent to the electricity released by a 72,000 kilowatt generator in one second.

The power generation power of the main engine in Changchun, Nanchang and Taiyuan renovated by Mufeng is 160,000 kilowatts, and the power generation power of the main engine in Liaoning, Crimson and Ningshuang is 280,000 kilowatts.

If the energy loss is not considered, Changchun can run 30 knots with one shot per second, 60 rounds per minute, and if the ship is stopped to shoot, it can reach 133 rounds per minute.

Of course, the premise is that the energy storage, release, and transmission systems of the warship can keep up, and the barrels and shells can withstand such high-speed shooting.

So for an electromagnetic gun of this caliber, energy is not a big problem, the real difficulty is the other two.

The first is the same problem as the electromagnetic catapult, the storage, release and transmission of electrical energy.

20 kWh of electricity can make the small air conditioner in the bedroom run for half a month, but if it is used for the electromagnetic gun, it will be released in a thousandth of a second.

At this moment, the electrical power will be very large, the current will be very high, and it can really reach the grid level of a small city in an instant.

This level of storage and discharge equipment, as well as transmission lines that withstand this level of current, are extremely challenging for materials and system design.

This requirement is higher than that of electromagnetic catapults.

After the electromagnetic cannon is completed, the difficulty of research and development of related technologies for battery ejection will be reduced a lot.

The second difficulty is the cannonballs.

The storage, discharge, and transmission equipment of the electromagnetic gun system needs to withstand the instantaneous huge energy, and the artillery shell also needs to bear the instantaneous huge energy.

The electromagnetic cannons on the earth are still in the experimental stage, and for the time being, they can only shoot solid bullets, that is, an iron lump without explosives.

None of the explosives can be installed, let alone a variety of different precision triggering fuses and guidance engines.

Now standing in this world, looking back at these two problems, they are basically problems of material and system design, which is also the most advantageous place in the world.

Researchers can put forward a plan that can directly test whether it meets the expected needs through the simulation of the scientific research system, and do not need to make physical tests to know the results, and can get reminders about the direction of improvement, which saves a lot of time.

The material design is the same, according to the molecular characteristics of different elements, scientific researchers directly design the required materials according to the theory, and then let the system conduct simulation tests, if there is a problem, you can also know how to change, until there is no problem.

Therefore, the two biggest difficulties of the electromagnetic cannon system are not too difficult for the scientific research system in this world.

After all these days of hard work, Neptune really figured it out.

Mu Feng watched Sirius and Neptune work in the scientific research center.

There wasn't much work left, it was all sorting and integration, and the two were busy until noon, when Neptune and Sirius shouted almost at the same time: "It's done!" ”

Mu Feng also received a system notification here:

"The basic electromagnetic cannon and artillery shell technology has been developed, and the relevant drawings have been generated, and the basic electromagnetic cannon and special artillery shells from 30 to 155 mm can be produced through manufacturing equipment."

.。 m.