The Rise of the Song People of the Three Kingdoms

Chapter 303 Navigation Innovation
As for the second sailing requirement mentioned by Lu Heng, to go across the sea to the east to find Jeju Island, Zhu Tao said that sea-going ship technology is enough, but there is a difficulty in directionality. Crossing the sea is not like being able to see the land along the coast. The direction can be identified by combining the sun on a sunny day and the stars at night.

When crossing the sea, the weather changes rapidly. It is possible for it to be cloudy for several months without being able to see the sun and stars. This makes it easy to deviate from the channel, or even spin in circles. This is the best way to do this on the vast sea. Dangerous, no matter how huge a sea-going ship is, the supplies it can carry are limited.

Zhu Tao replied that it made Lu Heng think of two things that can solve this problem. The first one is a sextant. This thing is a necessary prop for navigation in later generations. Lu Heng, who graduated from the Department of Computer Science in later generations, didn't know it at all.

The second is the compass. The compass was invented in the Song Dynasty. Except for a few places where the magnetic poles are chaotic, the compass is enough for most of the navigation routes. Besides, Lu Heng only needs to reach South Korea, Japan, and Malacca.

Lu Heng remembers how to make a simple compass when he was a child, and the key point is the magnet, which is also called a magnet in later generations. This thing naturally existed at the end of the Eastern Han Dynasty. Lu Heng had seen it in Jina.

With a compass, this big problem is solved.

Of course, the compass proposed by Lu Heng is just a simple way to make it. Although it can be used for a while, it will demagnetize and deviate from the course after a long time. This is very troublesome. Is it possible to check whether it is demagnetized all the time?

You can’t even see it with the naked eye, but it’s fine for the time being. Lu Heng remembers that Shen Kuo’s "Mengxi Bi Tan" has a detailed description of the compass. Shen Kuo was once on the summoning list. Later, he had the opportunity to summon this Northern Song scientist. come out.

In the coastal port of Wu County, there are new types of sailing ships, up to six poles and five floors. Each ship has a main body made of four load-bearing columns, and even major reforms have taken place in its shape!
Before Lu Heng ruled Jiangdong, except for the flat-bottomed ships, Jiangdong's large ships were all square and square, resulting in great resistance. Even a strong river wind could blow them over, let alone a huge sea breeze.

But today's sea-going ships are more like the big ships of later generations, wide at the bottom and narrow at the top. This design makes the sea-going ships suffer from less resistance and can relieve the huge resistance formed by the sea wind.

Lu Heng curiously asked which master shipbuilder it was. Zhu Tao said that it was the master shipbuilder, but the research of the top engineering student of Jiangdong College. In order to convince Zhu Tao, he even made two [-]% sea ship models The experiment, as a comparison, convinced Zhu Tao.

This made Lu Heng very curious about the engineering student of Jiangdong College. This is not the first time this kid has appeared on the stage. He also contributed to the new type of catapult last time, which shows that he is excellent.

Just when Lu Heng believed that such a big ship could satisfy the transportation from Jiaozhou to Jiangdong, he planned to build two seaports in Zhuya Island (later Hainan), Panyu (later Guangzhou), and Dongye (later Fuzhou) in Jiaozhou. , can continuously transport grain and grass to Jiangdong, and even go south to Malacca and other places for trade.

Cousin Zhu Tao gave Lu Heng a basin of cold water. Building such a large ship is not easy. Just one sea-going ship requires dozens of shipbuilding masters, plus hundreds of apprentices. It takes half a year to build one ship. The yield is very low.

That is to say, it will take at least three to five years before the new sea-going ships can be issued on a large scale and start large-scale voyages. Zhu Tao said that the northbound route has become mature, and the original sea-going ships can be used, while the new sea-going ships can Used to develop the route to the south and search for Jeju Island.

Reluctantly, now that a new sea-going ship has been built, to be on the safe side, we can only familiarize ourselves with the route to Jiaozhou in the south. According to this output, we can go to sea to find Jeju Island next year. If this is the case, it would be good to find Yizhou first. So they sent people south to familiarize themselves with the new waterway and search for Yizhou on the opposite bank of Fujian (later Bay).

Just when Lu Heng was feeling relaxed and happy and enjoying the sea breeze, Jin Yiwei finally passed the news of Yuan Shu's northward journey to Lu Heng. The latter opened it and frowned.

It wasn't that there was a change in Zhang Liao's side. Zhang Liao took Shouchun very smoothly, and also sent messengers to report to Lu Heng that he was still on the way. It was Yuan Shu's generals who Lu Heng frowned.

Jin Yiwei's report stated that besides the two generals Zhang Xun and Chen Ji, there were also several new-faced generals holding three-pointed double-edged swords, tiger-eye bamboo-jointed steel whips, iron double maces, and Fang Tianji.

Because Shouchun has been closed for almost two years and cannot be penetrated at all. I don't know that the generals who were recruited by Yuan Shu didn't even raise their flags and didn't know their names at all. The leader of the Jinyiwei who was in charge of Shouchun's intelligence came to apologize.

Lu Heng felt like he had seen a ghost. Yuan Shu's generals were dead, and there should not be many rebels left. Why did so many suddenly appear?

Then he looked at Ji Ling, one of the four fools behind him. Yes, Ji Ling, the short and tall man from Shandong, was beside him. What about the master who used the three-pointed two-edged sword that Yuan Shu had found?
Lu Heng didn't believe it and asked if Ji Ling had any brothers. This is not impossible. For example, there are many novels in the Three Kingdoms on the Internet that describe Dian Wei's death, and a brother who is more fierce than Dian Wei is called Dian Jie. Ghost Know if Ji Ling has an older brother or younger brother named Ji Jie or something like that.

But under Lu Heng's persecution, Ji Ling said that there must be no elder brother or younger brother, he is the only son!

This made Lu Heng puzzled, could it be the system's fault?It's a pity that my system doesn't have any remote query function, otherwise I don't need to guess like this.

But since Yuan Shu was dispatched, he had to be fully prepared. Now was not the time when the sea breeze was blowing in Wujun, Lu Heng was going to go back to Moling to discuss the countermeasures.

When Lu Heng first arrived in Moling, he received two messages. The first one was Zhang Liao's battle report or not called a battle report and a letter requesting food and grass. Lu Heng was amazed, just the report on Zhang Liao's letter made Lu Heng shudder, and one can imagine what kind of hell Shouchun is.

In Lu Heng's heart, Shouchun was basically equated with Dongye back then. In this way, Lu Heng had to send someone to govern, and Liu Ba and Yuan Huan were sent to escort the grain and grass for the first time. At the same time, the vacancy of Lujiang Biejia was left to Wu Can to assist. father.

At the same time, bring a letter to Zhang Liao, and if you find the right opportunity, you will take down Xiacai and other places in the north, and occupy the entire Yangzhou, so that the second collection order can also be obtained.

In this way, the second call of breaking hundreds can be carried out. A little more strength before the battle of Guandu is a strength.

(End of this chapter)