Li Rujin went home to visit his relatives, but the other staff members in Zhoushan did not have any leisure and began to prepare for the engine to be loaded on the boat, and one of the biggest projects was to re-do the counterweight and load ratio for the submarine. A submarine with a displacement of about 1,000 tons has a carrying capacity of about 100 tons.

The 100 tons should be allocated to weapons and equipment, personnel supply, fuel supply, and the weight of the crew themselves, so the 100 tons of load is extremely important for the submarine, and it is necessary to calculate repeatedly to get the most reasonable ratio.

Before the engine was put on board, the staff had done a good job of proportioning the submarine according to the relevant data support, but the engine developed by Li Rujin and his team was far lower than their proportional weight in terms of weight.

In their estimates, the weight of the engine should be about ten tons, maybe heavier, plus other auxiliary equipment, the total weight is about fifteen tons, so the reserve of fifteen tons of counterweight should be able to meet the demand, but the weight of this engine is less than three tons, even if the auxiliary equipment is added, that is, five tons, which is enough to increase the load capacity of ten tons.

If it's one ton or two tons, it's okay to say, a simple movement is fine, and one or two tons of things are still relatively easy to arrange, but suddenly there are ten tons more, which is a big problem.

In order to achieve the 10-ton load, the staff had to redo the load ratio. After all, the ten tons of load are not just divided into parts, such as adding five tons of fuel, two tons of weapons and equipment, and three tons of personnel supply.

The space of the submarine is narrow, and every inch of space utilization must be accurately calculated, adding five more tons of diesel fuel, and increasing the fuel tank, which will occupy the space occupied by other items before, and this move will implicate many problems, and the whole body will be affected.

There are also many other changes, such as the change of the engine room, the engine designed by Li Rujin, light weight, small size, the original reserved space is more than enough, and a lot of space is empty, how to deal with this part of the space, is also a big problem.

Li Rujin designed an engine, and then patted his ass and left, but left a mess for the other staff, working day and night for several days in a row, and they all had a kind of excitement and longing in their hearts, eager that this submarine could be launched as soon as possible, pass the test as soon as possible, and equip the troops.

It has been a long time since there has been no fresh blood injection into the navy of the Dawen Empire, and now the main force of the Dawen Empire's navy is actually a heavy cruiser snatched from the hands of the Europa Empire, isn't this a vicious slap in the face of these R&D personnel?

This submarine, they participated in the manufacture, and they know very well in their hearts how powerful the combat effectiveness of this submarine is, it is an extremely photographable and terrifying killer, let it be targeted, not to mention the heavy cruiser with a displacement of 15,000 tons, twice as big, they are also confident that they will send the target to the bottom of the ocean.

At the beginning of the construction of construction, they were full of confidence, fearless of hardships, hoping to use their own strength to contribute their own strength to the navy of the Dawen Empire, and the hull of the first submarine was completed in less than six months.

They are afraid that the engine has been produced, but the submarine has not yet been built, how embarrassing it is! Unfortunately, they were disappointed. A year has passed, the hull of the second submarine has been built, and the engines are still not moving.

Two years have passed, and the third hull has been built, (it was supposed to be the fourth, but due to the floods in the Dawen Empire, there was a long pause in between.) The engine is still far away.

From hope to disappointment, to the end of the hope, they walked too bitterly, but they did not lose their fighting spirit, on the basis of the original submarine, they developed a small submarine, which can be regarded as their last effort.

Just when they were extremely disappointed, the engine R&D team from the Imperial Capital Research Institute came, and the surprise came very suddenly, followed by another demon - Li Rujin, under his leadership, a month, only a month, an excellent engine appeared in front of their eyes like magic.

At this moment, they rekindled their fighting spirit and devoted themselves to their work, isn't it just to redo the load ratio? No matter how big it is, it's a big deal to start over, what is it to stay up late, the internal structure diagram has also been slightly changed, even if the extra space is allocated to the crew, it is good, at least it can make them sleep a little more comfortably.

Space on a submarine is extremely precious, and in order to save space, the sailor's sleeping place on the submarine is small enough to make you afraid, usually 2 meters long, 1 meter wide, and 80 centimeters high, so that in such a small space, not only an adult sleeps, but also his luggage.

The renovation of the submarine was in full swing, the R&D personnel stayed on the submarine all day long, guiding the work, and the workers also worked overtime to carry out small-scale transformation of the submarine according to the new plan.

When Li Rujin returned from the imperial capital, the entire project had entered the final stage.

Li Rujin, who stayed in the imperial capital, was not idle, since his sister was pregnant, his status has plummeted, and he can only mix with his two sons every day, but fortunately, his son does not recognize his life, and Li Rujin did not spend two days to get acquainted.

During the day, he took his son, and at night, he hid in the study and continued to construct his own set of philosophical theories. Life is comfortable and fulfilling. It's just that sometimes when I want to make love with my wife, there will always be a little guy who makes trouble, and Li Rujin has not been happy and depressed several times.

It is said that children are the real "third party" to intervene, this time. Li Rujin can be regarded as having a deep understanding. Unable to afford such a squandering after a ten-day holiday, Li Rujin left the imperial capital and returned to Zhoushan Island to continue the research and development of submarines.

On the third day of Li Rujin's return, the engine officially began to be installed on the ship, and the entire installation work took only two days.

Ten days before the sea trial, a large number of troops began to station on Zhoushan Island, and the atmosphere of the entire Zhoushan Island began to become tense.

Five days before the sea trials, military officers began to come to Zhoushan Island, and a lieutenant general from the Nanjing Military Region took over the defense of Zhoushan Island. And this lieutenant general is Wang Jianzhong, whom Li Rujin recognizes.

When the two met, they had a pleasant greeting. Reminiscing about the past, Wang Jianzhong was even more emotional, it has only been a few years, Li Rujin has been a major general in the imperial military, and in the evening, Li Rujin, as a landlord, will inevitably have a banquet for Wang Jianzhong.

At the wine table, Wang Jianzhong secretly said to Li Rujin: This submarine trial, not only the marshal of the military department and the great elders of the cabinet will come, but the emperor and crown prince of the empire are also very likely to appear.