Commander Su Bo had to return to Xiamen ahead of schedule.

He also wanted to take a leave of absence for five or six days, but Yongshengbo Zheng Cai greeted him by telegram every day and talked about his feelings about life, which was really unbearable.

Is this a hello? This is urging him to go back...... Even the youngest daughter Zheng Xiuwen has to sue him for her birthday...... Zheng Bin, the third master of the Zheng family, always came to visit him, so he didn't mention the matter of returning to Xiamen...... It's just a matter of discussing the 1650-style firecracker, and it's polite to ask one question a day.

Commander Su Bo was convinced...... I can't go back to Xiamen early?

Commander Su Bo boarded the ship with a new batch of military quartermasters...... Zheng Bin was the only one who saw him off on the dock, and the look in his eyes, Captain Su Bo thought that he wanted to kick himself across the strait...... A big man seems to be able to calm down, but the Adam's apple is constantly moving, and he is swallowing saliva.

This batch of military quartermasters...... It is more correct to call it munitions, in addition to the Type 1650 firearms, there are also a batch of Hantang version of Hale rockets...... Play.

The Hantang version of the Hale rocket is directly taken from the Hale II rocket of later generations, and the appearance has not been changed, only the propellant and explosive charge have been changed.

A transitional goods, Lin Shengli, the director of the Red Star Military Factory, didn't want to bother with it.

In 1880, the Royal Arsenal of England made improvements to the safety of the old Hale model, named the Hale II, and they mainly separated the rotation device from the propulsion nozzle, and used a tubular launcher with a sight to eject, so that the accuracy of the Hale II was greatly improved.

The Han and Tang versions of the rocket body and the warhead are separated, continuous waves, and I also wanted to use the iron shell body, and later Lin Shengli, the director of the factory, found that the cast iron type has a large moment of inertia, which is more conducive to the stability of the center.

These two parts can be soldered with white copper juice after being charged separately, and this technique is a common technique for silversmiths and blacksmiths in the Ming Continent.

Most of the people on the Ming Continent were more familiar with bronze than white copper. This continent is the true home of white copper.

On the Ming continent, by the 4th century AD at the latest, Yunnan had a large amount of white copper mined and produced, known as cloud white copper.

This is mainly due to the natural symbiotic ore of copper and nickel in Huili, Yunnan Province, which is a rare resource in the world. Of course, it also provides raw materials for the smelting of cupronickel.

The earliest record of white copper can be found in the fourth century A.D. in the Eastern Jin Dynasty Changxuan's "Huayang Guozhi 61 Nanzhong Zhi" volume 4. The text recorded: "Mantis County is also famous for its mountains, and silver, lead, white copper, and miscellaneous medicines are produced. ”

These historical records do prove that Yunnan Province produced cupronickel very early.

Although the history of smelting white copper in the Ming Continent is very long, it is a pity that there is no pure metal nickel smelted.

The white copper devices manufactured in Ming Continent are not only sold in all parts of the country, but also exported to foreign countries. According to research, as early as the Qin and Han dynasties, in the western part of Xinjiang, there was a currency minted in white copper, containing 20% nickel, and from the analysis of its shape, composition and historical conditions at that time, it is likely to have been transported from the Ming mainland.

During the Tang and Song dynasties, the nickel and white copper of the Ming Dynasty have been exported to Arabia, and the Persians called the white copper "Tang stone" at that time. After about the 16th century, white copper was shipped all over the world and won wide praise, and it was exported through Guangzhou and sold to Europe.

The English word "Paktong" or "Petong" is a transliteration of the Cantonese word "white copper", which means white copper from the Ming mainland, that is, a copper-nickel alloy produced in Yunnan.

In copper alloys, cupronickel has a wide range of uses due to its excellent corrosion resistance and easy molding, processing and welding, especially special electrical properties, which can be used as resistive elements, thermocouple materials and compensation wires.

Germany's Heininger brothers successfully imitated Yunnan white copper. Immediately, large-scale industrial production began in the West, and the alloy was renamed "German silver" or "nickel silver", and the veritable Yunnan white copper was obliterated.

Hantang Group borrowed the technology of the ancients to weld, which is very convenient to use.

The propulsion charge of the Hantang version of the Hale rocket is columnar gunpowder, which is divided into deep-bore type, shallow hole type and port type. Deep-hole type, due to the large combustion surface and fast speed, can be used for short distance; Shallow bore type, which can be used for medium range; Port-type, can be used remotely.

The blasting part of the Hantang version of the Hale rocket is also columnar gunpowder. The machining process of the two columns is not the same...... Okay, let's make up for it.

The continuous casting technology of the Hantang version of the Hale rocket body ensures that the specifications of each one are within a reasonable range; The quality of the propellant, because it is continuous production, the thrust-ignition ratio is also within reasonable tolerances; In addition, the use of a barrel launcher as a launch platform makes its launch specifications predictable, and of course it needs to cooperate with weather conditions. In many cases, the error is in the range of 10 meters...... The explosive powder at the head of the rocket weighs about 1.5 kilograms, and the fragments formed after the explosion can be killed within 10 meters......

At that time, after watching the video, Head Su Bo said to Director Lin Shengli: "You worked so hard to make this thing?" If this is on the surface of the sea...... I don't know where the sea breeze is blowing. ”

"It's not a hassle at all...... The specifications are all readily available. Isn't this to save iron...... How much iron does a cannon need, how much does this thing cost......"

"Then why do you want a cannon on Hai'an's side?"

"If there is no artillery, is it still called a navy?"

Captain Su Bo was speechless for a moment.

He thought for a moment and said, "What if this thing falls on our heads one day?" It's not that I'm afraid of Lao Zheng...... It's about letting someone else steal the technique......"

"Where is it so easy...... Bullets and shells run by inertia, but when this guy is running, the propellant will continue to decrease, and its own center of gravity will also change...... Even if you want to launch probabilistically, you have to be able to calculus...... Will you? ”

"Calculus? I've never heard of it...... I'm a big boss. ”

"Okay, please take my manual and range meter, you'd better memorize it, it's not difficult."

"Director Lin, is this thing safe?"

"Don't worry, you can't blow up if you fall ten meters on the mud ground......"

In addition to this batch of munitions, Captain Su Bo's ship also brought a girl from the Hantang Group, Hu Liu technician.

Hantang Group decided to let the girls go out, the women's work in the Ming Continent can now be carried out, and it can't be kept blank like this, of course, the premise is to put safety first, Xiamen is a good place.

The women of the Ming Continent are industrious, and as far as the Hantang Group has seen, some of them can fish in the offshore waters like men! Not to mention other industries...... Wielding a sugarcane knife like a man to harvest sugarcane is too trivial.

From the DV that Manager He Bin got back from Guangzhou at that time, and the DV that Su Bo brought back from Xiamen, Quanzhou, and Zhangzhou, the people of Hantang Group basically didn't see the Ming beauties in costumes walking around the street...... The people who can walk around the street are either carrying burdens or carrying baskets, no matter how old they are, they are in a hurry, and their appearance is really ordinary...... However, there are also women who pass by wearing Fujian-style bamboo hats, but they can't see their appearance...... I can't see the figure, and I can't see the clothes of the Ming people, and I can't see these at all.

The women's resources in Xiamen have not yet been developed, and seeing them doing some low-cost work, Hantang Group feels that its women's work has not been done well, and it is a bit derelict in its responsibility.

Hantang Group recruits girls who dare to go to Xiamen on the Internet, and the basic situation of Xiamen, the personnel structure of Hantang Group there, and the public security report are all hung on the Internet, which can be queried at any time.

As a result, Hu Liu technician from the salt chemical industry zone in Budai Town took the initiative to apply.

Her reason is very simple, now the chemical industry has not yet developed to the stage of fine chemicals, and her role in Budai Town has not yet been fully played, so it is more appropriate to carry out women's work in Xiamen for the time being, and she also prefers Ming-style clothing...... Of course, it's the anime version, and the dyeing and finishing technology at this time is too scummy...... Where is there so many beautiful colors...... So the technicians of the Hantang Group want to laugh when they think back to those costume movies, damn, where did they get so many flowers and greens - just those few colors.

Hu Liu technician and Su Bo head set foot on the sailing ship to Xiamen at the same time, and now this route is already opposite, that is to say, the Hantang Group has drawn out a paddle steamer sailboat - on land, the passage from Gelanza City to northern Taiwan can pass the four-wheeled carriage normally, and it does not need to participate in the transportation of personnel or urgently needed items, and the tonnage of goods transported by the sailboat is still too small, and the passenger transport is okay.

Captain Fan Dahai greeted the two passengers warmly, strictly speaking, it was to welcome the first girl to get on the sailboat, or rather, the girl who was about to set foot on the Ming Continent, it was really responsible!

After the girl Hu Liu got on the boat, she was directly arranged by Captain Fan Dahai to rest in the captain's room, and Captain Su Bo blew the sea breeze with Captain Fan Dahai on the deck of the ship.

Before setting sail, Captain Fan Dahai looked at the sailboat on the dock that was also getting ready to set off and said, "Xiaobo, why are you in such a hurry?" Working on vacation is counted as overtime - but you have to report it online, and it takes a lot of effort. ”

Captain Su Bo said: "That's it, that is, don't trust people...... It's not uncommon for us to argue with them, men are like that! ”

Captain Fan Dahai heard footsteps behind him, and guessed that it was Technician Hu Liu who came out, otherwise this guy couldn't speak in this way......

Captain Fan Dahai deliberately said: "Did you get the little lady to hear about Xiamen last time in Quanzhou?" ”

Captain Su Bo's face suddenly turned red and said, "Where is it?" It was a prisoner's family...... It's just gratitude! This ancient, what a thanksgiving......"

The more Captain Su Bo spoke, the quieter his voice became, and he couldn't wait for Hu Liu to immediately turn around and go back to the cabin...... How good the conditions are in the captain's room, you run out to blow the sea breeze!

Hu Liu staggered to the side of the two people, and it was too lonely for one person to be in the cabin.

The sea breeze ruffled her show...... also messed up Captain Su Bo's heart, why didn't he discover the beauty of Hu Liu?

Hu Liu easily came to them, held the side of the ship with both hands, and looked at the sailing ship that had set off.

Both men unconsciously straightened their chests, and they really didn't expect her side to be beautiful...... Technician Hu Liu said: "It's strange, how could the sailing ship set us off first?" ”

Commander Su Bo hurriedly said: "It's nothing for them to set off first, they will arrive two days later than us!" ”

Captain Fan Dahai added: "When our boiler was pressurized, it was half an hour slower than they set sail. ”

Both of them thought that Hu Liu's voice was so good, why didn't they find it before?