It was already close to dusk, and in other places throughout the Northern Song Dynasty, it was the time of sunset, and before dusk, most of the peasants had prepared their meals, or even eaten them.

For the long night, most ordinary families are sleeping, or some women, under the dim candlelight, do some handicrafts or weaving.

Even in a city that never sleeps, it is only a few neighborhoods or markets, full of light.

However, this point does not exist in the Dinghai Navy, although there is no way to crack oil on a large scale, but the pure coal resources are extremely rich.

Kerosene refining is relatively complicated, but it has been groped and explored, and the output is not high, but for the entire Dinghai Navy, it represents light.

Sunrise and sunset, this is a historical tradition, but this is a huge waste of time, not to mention winter, just summer, daytime is not very long, generally until six or seven o'clock, the sky has been dark, up to eight or nine hours, or even ten hours of night, before it is day again.

In winter, around 6 o'clock, it was already dark, and the whole night was twelve or thirteen hours, which was a huge waste of time.

Bianliang's city that never sleeps, that is under the premise of a large number of candles, not to mention the high price of butter candles, it is said to be ordinary candles, and it is not consumed by people on the side, and even ordinary oil lamps do not dare to adjust too bright, too bright light, the consumption will be greatly increased.

Kerosene does not have this problem, although it is produced less and the price is relatively high, but it is still more economical than things like candles, and the most important thing is that it is bright enough.

After the advent of glass, the problem of outdoor was solved, no matter how light paper was, the light transmittance was not as good as transparent glass, let alone a special kerosene lamp, and it was not afraid of the wind outside.

The shipyard is one of the most important departments in the entire Dinghai Navy, and other places, working during the day, at most overtime for a period of time, the shipyard is almost divided into two shifts, with a total of more than 9 hours of working hours a day, such an efficiency, I don't know how much it has improved compared with other shipyards.

At this time, there were many people working in the shipyards, and a large number of docks were opened in unique places by the sea, and with the help of aqueducts, it was possible to enter the sea by filling the water.

More than 20 different docks, even if 4 are completed, the others are also under intense construction, more than 2,000 people are working in the docks, on average, more than 100 people are working intensively in each dock, and the roar of various tools is endless.

Any work is not delivered in vain, but hard work, with the help of a plank, a nail, most of the ships have begun to take shape, but there is still some time before it is completed.

The person in charge of the shipyard had already been notified, and when he knew that Zhao Xin was coming, he brought someone to greet him early, and Zhao Xin asked briefly, but he got the news that disappointed him.

The four completed ships, the earliest one, were completed 7 days ago, and on the same day, after a simple launching ceremony, intense testing began, and the latest, the latest, was also completed 3 days ago, and they also entered the sea experiments.

After more than a year of establishment, the current style has been formed, the pace has been significantly accelerated, and the degree of industrialization of the whole city has gradually improved.

Because of the insight of later generations, Zhao Xin will not deliberately pursue profits, and he owns the entire Northern Song Dynasty market, even if it is a simple industry, he can obtain rich benefits, and he does not have to pursue the little wages of the workers.

The most important thing is that the navy is a relatively closed system, and the wages of the workers, perhaps in the first year, are still a little cautious, they are afraid that their families will not have a good life, and most of the money is saved.

However, when more and more family members and relatives are taken to the navy, when the income is fixed and getting bigger and bigger, it becomes inevitable to enjoy a little moderation.

Zhao Xin's carefully built economic circle has gradually demonstrated that under the premise of a population of 1.2 million, even if each person has an annual income of 100 yuan, this economic circle will be as high as 120 million, and when the goods are circulated, the value generated will be greater and greater.

In the future, when the scale of the city of the Dinghai Navy is highlighted and has a sufficient population, the internal needs of the Dinghai Navy can be simply determined, and the industry of the entire Dinghai Navy can be promoted to upgrade and develop.

These are the future roads, if Taiwan is not taken, or if it occupies the entire island off the coast of China on a large scale, it will be impossible for the navy to withstand the huge population, 10 million is just a theory, but to accommodate it, it will not only take time, but also need to be built.

These shipwrights, so serious, and quick testing, so that Zhao Xin did not see the first time, he was not disappointed when he saw the ships caused by these things, he found the person in charge of the dockyard, and inquired in detail about the entire progress.

These ships, all of which are experimental ships, their actual role is not as big as imagined, after all, the smallest is a ship of 300 materials, and the largest is only more than a thousand materials, these ships, even if they are ordinary sea ships built with Jiangnan Shipyard, are insufficient in tonnage, let alone larger.

The sea ships that Zhao Xin needs are at least 500 tons or more, which can support huge sea transportation and large-scale migration to the island, while ships below 2,000 materials have too little transportation volume, even if they transport people, they can't transport too much.

In the whole dock, the whole construction process, there is a perfect record, which Zhao Xin has always emphasized, at the beginning, these craftsmen are very unaccustomed, the entire Northern Song Dynasty, the literacy rate is very high, among the craftsmen, can also know some common words, but most of the craftsmen, they work with experience, this experience, is a long time, accumulated.

These are just a person's feelings, not an appreciable law, only from the very beginning, to record, summarize these accidents, the existence of the inevitable, can promote some progress in shipbuilding technology.

The first thing Zhao Xin needs to see, this is these, from the construction of the dock to the entry of the ship into the dock, there are detailed records, for example, the first laying of the keel, the first laying of timber, the completion of the deck, the construction of the superstructure, the handling of the sails, and then the completion of the entire construction, the record of the launching, and the same, the process of each launching test is also in it.

Compared with the previous construction, Zhao Xin attaches more importance to these experiments of launching tests, and the reason why he came back in such a hurry is for this record.

Because the shipwrights have not been in the Dinghai Navy for a long time, coupled with Zhao Xin's attention, these shipwrights themselves have a higher salary, and perhaps some people are smart, seeing other craftsmen, they keep getting benefits and start learning, most of them are passable, and they don't have a lot of knowledge, so these records are also quite simple.

Like a running account, a large amount of data was recorded, from the beginning to the end, after Zhao Xin read it casually, he mainly looked at the 5-day records, and in the 5 days, he mainly tested those new projects.

The reason why this new ship was completed the earliest was because there were not many changes, only on the top of one sail, one-third of the position, there was a soft sail, and one third of the sail, which was a spinnaker.

The characteristics of the whole Chinese sailing ship are some sails like blades, this kind of sail can obtain relatively large winds, soft sails may also appear, but they are not suitable for Chinese sailboats, but the spinnaker has never appeared.

As the most important sail of the future ocean, the importance of the spinnaker is even greater than that of the soft sail.

Hard sail is the key to China, easy to operate, large wind area, this is his characteristic, but in the strong wind, not easy to control, is the monsoon season, only with the wind, can travel, which is also the key to the emergence of the shipping season.

In this era, many oceans have seasonal restrictions, where in the port, there are many ships, are waiting for the monsoon to open the day, there is no wind, no ship can go, sometimes, the monsoon night of a month or two, then the ocean-going ships, have to be blocked in the port.

When the monsoon arrives, it is the sails of thousands of sails, one by one, scrambling to leave the port.

Even in the middle of the 18th century, all kinds of sea vessels were developed to a certain extent, and the monsoon was very important, and in the middle of the monsoon, a lot of time could be saved.

With the cooperation of the monsoon and ocean currents, it can move forward faster and more steadily, but this monsoon and willow are seasonal, generally half a year, which also forms a fixed route, and also causes the maritime trade to not be able to form in all directions.

Maritime merchants are like this, with the help of ocean currents, it takes a month or two to reach their destination, and then it takes three or four months, or even half a year, to sell what they bring, and then leave China under the premise that the ocean currents and monsoons cooperate

This is the fixed model of maritime merchants in this era, but it is not what Zhao Xin pursues, the future industrialization of the Great Song Dynasty, the burst of productivity, far from the newly industrialized Britain can be compared, Britain at best, millions of millions, but the current Northern Song Dynasty, conservatively estimated at 100 million people.

As long as there is no war, the population will increase with agriculture and other aspects. The basis of industrialization is the productivity of the machine at the level of science and technology, but in the final analysis, it is still in the human body, more population brings, more demographic dividends, 100 million people, and 10 million is completely different from 10 million.

Then a fleet like Monsoon is not suitable and needs to be able to open in all directions.

This is different from China, although before the 14th century, Europe was completely surpassed by China, but after the Renaissance, Europe still burst out of a new world.

Sailing is one of the keys to this. In the middle, the use of the sail is one of the keys, the emergence of soft sails, greatly increasing the power of the boat, the emergence of the spinnaker, so that in the state of headwinds, you can also have a certain amount of power.

In the case of the same wind, the larger the area of the sail, the more the force area, the stronger the power, as for the shape of the ship, the system, and other aspects, the impact is there, but not big.

It is a pity that the boatwrights of this era did not have a deep understanding of the spinnaker, and there was no description of the spinnaker alone.

Of course, Zhao Xin knew that if it wasn't for his forcible push, this experiment would not continue, and those shipwrights would make large lucky boats according to their cognition.

Perhaps, when in their hands, with such an epoch-making thing as a steel keel, a 20,000 stone, or even 30,000 stone, or even higher Fu ship, with the characteristics of a steel keel, can also be made of a wooden ship of 1,000 tons, or even 2,000 tons.

For the Northern Song Dynasty, this is a leapfrog development, but in this way, what is the difference from the original development.

Without enough ocean-going vessels, it is impossible to cross the oceans, even the most critical ones, and find Oceania that belongs to Asia.

Instead of going all the way along the coastline like Zheng He went to the West, and finally reached the west coast of Africa after countless resupply, he really owned the ocean.

Among all kinds of data, calculation and search, from the middle to find the inevitability of chance, Zhao Xin silently calculated, especially the recorded things are very detailed, and some of the details are also shown in the basic data.

At different angles, there is still a headwind effect, and it is quite small.

Zhao Xin listed this separately, and then through some calculations, he finally came up with a data.

This data is not a constant, but a divisor, which must be targeted and specifically calculated.

A basic data acquisition is one of the gains this time, and then, it is other records, from the spinnaker, the method of upgrading and landing some sails, and some water secrets, etc., 4 experimental ships, representing different, before they came back, Zhao Xin carefully calculated, when the experimental ship came back, Zhao Xin told the person in charge of the ship one by one.

The shipwrights of the Northern Song Dynasty, they are all good at shipbuilding, and they have a deep understanding of the performance of the ship, they just never consider it, and there are spinnakers, soft sails, and different arrangements.

The things recorded before are not obvious, but for this aspect, they conducted special tests, and they found that it is really as Zhao Xin said, the spinnaker has a strong effect on headwinds and different wind directions, even if it is headwind, it can also gain power, and soft sails, which are subject to huge wind, can obtain greater strength.

The real facts persuaded them, and they even had a lot of ideas based on these sub-projects, but Zhao Xin still stopped them, and when more than 20 experimental ships completed the experiments, and all the mature sub-projects were put together, and Zhao Xin made a drawing, when the time came, it would be the real ocean-going seagoing ship.