Just like when he returned to school from vacation many years ago, Zhang Ning gradually began to calm down because he knew that external competitors were busy preparing for the next action. This kind of conscious restraint was not due to self-control, but was formed over many years in previous lives.
A kind of psychological habit; the competition in modern society is extremely fierce, and he has never experienced a life without worries about food and clothing before, so he has formed a mentality that only by maintaining a dedicated mentality non-stop can he survive. Improvement in work and study can make
It provides peace of mind and is an irreplaceable source of psychological comfort.
He is an insecure person. When he was in Jiujiang City, he was always worried about what would happen if he failed. He thought about what would happen to Yao Ji and what would happen to Zhang Xiaomei. There were too many problems and setups that he couldn't think of. He could only stay awake and think about things and do his best.
The best way to dilute such worries.
Without having to interfere too much with the operation of the bureaucracy, he returned to his previous life. He didn't seem busy, but people could always find him in time when they needed him.
He and Xu Zixin have been close recently. This man who just took up the post of junior officer in the Ministry of War has been transferred to Jiangxi but Zhang Ning has not let him go. I wonder if Xu Zixin can be called a "shipbuilding expert". After all, this young man has spent most of his life.
He had put all his energy into getting into the imperial examination, but Zhang Ning could tell that he at least knew a lot about shipbuilding and could find a group of familiar experts, which was enough.
On the campus in the north of the city, Ma Dapeng from the Ordnance Bureau and a group of craftsmen leaders are testing a kind of artillery. This is not a new artillery. It belongs to the same casting technology as the long-barreled field artillery installed by the Army, but the caliber is smaller; it has been stored in the armory.
It has been there for a long time. When the Ordnance Bureau was developing field artillery, it tried to build two such medium-sized guns, which weighed three kilograms with solid bullets. However, it later felt that the caliber was too small and the shells were too light and not powerful enough. So the Ordnance Bureau cast another one and now equips the Yongding Camp.
The Army's heavy artillery weighing nearly a thousand kilograms.
However, army artillery cannot be equipped on warships. The naval fleet currently being prepared by the Suzaku Army is an inland river vessel and cannot use too heavy artillery. Therefore, the choice of broadside guns puts the two shelved medium-sized long-barreled guns into use...
The flat-bottomed river boat can carry, and it is a long-barreled, horizontal-firing artillery. It seems that all factors meet the requirements. Even if Zhang Ning is not familiar with the navy, normal intelligence and imagination can understand that the broadside cannon is of course a long-barreled cannon that fires horizontally: water rocking
The accuracy of the wobble is lower, and the salvo effect is better at a closer distance. The extremely fast muzzle speed of the long-barreled gun can cause great destructive power.
There are only two difficulties. First, to cast long-barreled cannons in large quantities again requires a lot of copper material. No matter how much the two provinces of Huguang and Jiangxi collect, they cannot meet the demand for raw materials. At present, the Suzaku Army does not have the technology to cast long-barreled cannons using only iron.
, must be copper. Second, how to eliminate the rear shock force of the broadside gun.
The first difficulty remained unsolved for the time being. No one could turn stone into copper, and there was no way to prevent high-pressure artillery from exploding without using copper. But the second difficulty soon became apparent.
First of all, Xu Zixin proposed to increase the ship's stability and load draft from the hull shape, flat bottom, widen the hull, and eliminate the floors on the deck to make the warship a flat shape, which of course would be less susceptible to the impact of rear shock forces.
Nor will the large number of metal cannons make the bottom of the ship draft too deep.
When Zhang Ning took a look at the picture that Xu Zixin drew, he couldn't tell what it felt like. It was wide and flat like a turtle, which was very different from the long, narrow and domineering battleship he had imagined... Sure enough, there was still some distance between reality and dreams. However,
He still reluctantly accepted it. After all, the navy was not built for viewing, but to adapt to the purpose of inland warfare. The long, slender and pointed-bottomed sea-going ships were inconvenient to navigate in the Yangtze River. However, Zhang Ning also made a suggestion.
They put the broadsides in the cabin below the deck, because Zhang Ning had never seen a wooden ship with broadsides deployed on the deck.
Secondly, regarding the design of the broadsides, Xu Zixin's shipyard staff proposed using hinges and inlaid rails at the gun position to buffer the recoil after firing. This design of course has no theoretical basis and relies on experience. Even when the matchlock gun is fired,
To press back, the same goes for artillery. It is an obvious phenomenon.
How long should the buffer hinge track be made, and how much backlash force should it withstand? According to the craftsmen, they can only wait for the ship to be built at the Jiangxi dock, and then try again and again to gain experience.
This stupid method was too time-consuming, so Zhang Ning decided to calculate the recoil directly based on the selected artillery. This is what a group of people were doing today on the school field.
A tent was set up next to the school grounds, with two stools supporting a chopping board. Zhang Ning, a group of officials, and the head of the weapons bureau were sitting or standing around it. There were also Li Zhen and his bodyguards outside. There were hundreds of people on the left and right.
The man was tinkering with something there.
From time to time, there is a muffled sound of thunder and artillery. The sound is so loud that it can shake the door panels in the tent. The sound of such artillery can spread throughout Wuchang City, which is also a major feature of this city. Every time the Ordnance Bureau makes
A cannon will be test-fired at the school grounds, and it will not be delivered to the army until the barrel is exploded; so the people have been used to it for a long time.
At this time, the muzzle of the tested artillery was completely level with the flat ground. Because it was placed at a low height, the range was not far. Zhang Ning chose to completely ignore the air resistance and use the parabolic formula to calculate the accurate exit speed of the cannonball. The level at which the cannonball landed was measured.
Distance, muzzle center height minus real quadratic core radius; known gravity acceleration. A simple quadratic equation system, first calculate the time through the height, and then use the time and horizontal distance to calculate the muzzle velocity.
Then according to the law of conservation of momentum, by weighing the weight of the gun and the weight of the shell, calculate the muzzle velocity of the gun's rear seat. Then through the formula of impulse, it is easy to list a data table between the length of the buffer hinge track and the impulse.
The entire experimental calculation is very simple, and even middle school students can calculate it. However, Zhang Ning also encountered a little trouble. The data unit brought into the gravitational acceleration is meters per second square, but the length and size units and time measurement used at this time are completely different.
The scale units of the Ordnance Bureau have been standardized, with nanometers as the unit. Although it can be estimated that it is about one foot or three meters, it is difficult to avoid a large error... The meter is a common measurement in the modern world, and it has nothing to do with the local measurements of the Ming Dynasty.
No. Moreover, the unit of seconds for calculating time also originated from Western clock machinery. The units used in the Ming Dynasty are completely different from those used in the Ming Dynasty.
So Zhang Ning had to use tools such as iron balls and hourglasses to re-measure the acceleration of gravity on the tower, using the current units as the measurement.
For a simple calculation, Zhang Ning spent a lot of effort and finally worked out the data table after many twists and turns. From this incident, he once again realized that it is necessary to complete a simple technology without any foundation.
Experiments are also not easy to explore.
…
However, the Archives of the Ordnance Bureau has gained another valuable information, that is, the data of acceleration of gravity. The new data of length unit and "flick" time unit of the Ordnance Bureau are completely adopted.
At the same time, Zhang Ning's calculation process was also regarded as a treasure by the scribes and chief craftsmen of the Ordnance Bureau. They have begun to study the various formulas left by Zhang Ning. The symbols and Arabic numerals are annotated with Chinese characters, and some people have already understood the basics.
, I just think that it would be "esoteric" to study it in depth... They can already bring in the formula for formula calculation and formulation of the Ordnance Bureau's formula, which is also the result.
Why are the scribes and craftsmen so enthusiastic about the mysterious things that Zhang Ning tinkered with? Just like a school, a disciple of a master craftsman, the apprentices will think that what they learn from the master is a kind of inheritance... Obviously the inheritance of Hunan
It is of great benefit to have the king's mantle and call himself a disciple. This influence comes from the position of power, not from the academic itself.
After the Battle of Jiujiang, there was a rumor circulating that some people believed that King Xiang met a semi-immortal master in the mountains and learned some mysterious knowledge that was not human; and the ghost-like symbols he often wrote cleverly made this kind of
The rumors have a little more credibility. Even many officials who have read books about sages believe that King Xiang did learn from masters and hermits. People always want to deify princes and add some mysterious aura to them, just like Emperor Gaozu of the Han Dynasty
There are legends such as lightning and thunder when Liu Bang was born.
King Xiang is omnipotent. When shipbuilders and officials discuss the structure of new ships, he can always put forward some ideas just right, and after people think about them, these ideas are always clever and reasonable...such as the side cannon firing
Below decks, Xu Zixin's staff quickly wrote eloquent articles discussing the pros and cons of this design.
But this kind of discussion cannot last long, because matters in Jiangxi are urgent. Xu Zixin needs to take office in Jiujiang immediately and bring his group of staff and craftsmen leaders there so that a series of preparations will not cause problems.
In Jiangxi Province, Yu Qian has already issued an official speech to prepare for the naval vessels. A canal will be dug to directly connect Bali Lake and the Yangtze River; a dock will be built on the shore of Bali Lake. After the construction is completed, the lake water will be diverted to the dock fortifications. Are there any problems with the series of projects?
Xu Zixin's team needs to visit the site for inspection and evaluation. This group of people includes civil servants, scribes, and experienced craftsman leaders, a complete talent system recruited directly from Yuezhou.
The design of the main ship of the Suzaku Army Navy has not yet been completed. Xu Zixin will submit it to Jiangxi for finalization and then report it to the Ministry of War. Before leaving, Zhang Ning also told Xu Zixin and Yu Qian to have a good relationship, because the money and materials needed for shipbuilding mainly rely on Jiangxi resources, so it must be
Yu Qian made proper preparations.
One day Xu Zixin suddenly asked Zhang Ning to name the new main ship of the navy. He proposed it at the last moment, and Zhang Ning casually mentioned: "The warship is wide and stable, so let's call it a safe ship."
The people around him immediately agreed. It was easy for everyone to think that King Xiang's previous name was peace, so naming it after this, of course they wholeheartedly agreed.