The next day, the king of Wei and the mighty fleet left the Qingzhou dock. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

Xiao Ming looked at King Wei's fleet with some envy, not knowing when his Qingzhou City could have such a majestic fleet.

In the shipyard in Qingzhou, his Galen ships are still under intense construction, and he only hopes that by the end of the year, he can really get three Galen warships as Zhang Liang said.

When the time comes, the artillery will be placed on the Galen ship, and in this era of sail warships, he will also step into the sea.

But when he thought of artillery, his head suddenly grew again, and the number of artillery needed on this battlefield was also a lot, and it was a heavy burden, so it seemed that this training of a powerful navy really needed to keep throwing money into it.

After sending King Wei, Xiao Ming went directly to the Equipment Division.

At this time, Chen Qi was leading the craftsman to cast the iron mold, and the science and technology library in his mind was full of casting methods for artillery.

Xiao Ming naturally will not take the detour that his predecessors have taken, and the method he used this time is the iron mold casting method, which is actually ancient.

However, it was adopted to cast artillery in the Qing Dynasty.

In fact, there is no technical difficulty in this method, only today's craftsmen cannot think of this method at all.

Sometimes it's not about technology, it's about discovering technology.

Now Xiao Ming has taught Chen Qi and others the complete iron mold casting cannon technique, and for these skilled craftsmen, it is only a matter of time before they explore and try, and this iron mold casting cannon method is mastered.

"Your Highness, now we are making a mud cannon embryo." Chen Qi saw Xiao Ming coming over and immediately walked over.

This time he didn't sleep well for a few days and nights, and he thought about the methods that Xiao Ming taught him day and night.

And artillery, the weapon in Xiao Ming's mouth, made him even more excited, as Xiao Ming said, if the artillery is built, he Chen Qi is enough to go down in history.

However, these days, he led the craftsmen to try to cast the cannon, only to find that the manufacture of the cannon was not so simple, and now the cannon mold has failed several times.

Looking at the failed mud cannon embryo in one place, Xiao Ming said: "Failed again? ”

Chen Qi's expression was a little tired, and his face was ashamed, "Your Highness, this time the craftsmen were born by hand, this clay cannon embryo always failed to shape, but now it is more proficient, I think this time it is almost the same." ”

Xiao Ming nodded and looked at the craftsman who was making the mud cannon embryo.

The iron mold casting cannon should first be divided into 4-7 sections according to the size of the iron cannon to make a mud cannon, and then according to the number of mud cannon sections, the iron mold clay type is divided, each clay type is divided into two petals, and the inner surface is rotated with a car plate to make the surface smooth and clean, and the shape is regular, and then dried for later use.

A prefabricated handle is placed in the clay mold, and it is cast into one piece with the iron mold when poured.

Then, when turning the cast iron mold with the mud mold, first put the section of the muzzle upside down on the mud plate, fill one of the petals with mud, after drying, cover the mud plate, tighten the mold, and obtain a petal of the first iron mold after pouring.

Then remove the filling mud, and cast another iron mold in the same way. In this way, the section by section pouring can be cast into a complete set of iron molds with layers of tenons.

Finally, when casting the iron cannon with the iron mold, the inner surface of the mold is first brushed with the paint made of fine rice husk ash and fine sand mud and water, and then the second layer of paint prepared by extremely fine coal powder is painted, and then the iron mold is tightened, the mud core is heated, and the molten iron is poured. After solidification, the iron mold is immediately removed, and when the gun body is still red-hot, the burr is removed, the mud core is removed, and the finished gun is obtained.

However, this time, in order to reduce the explosive rate of the gun, he planned to use a hollow pottery core instead of a mud core, and inject water into the hollow pottery core to cool the iron in the barrel.

This is also the local method of barrel cooling technology, which only aims to reduce the explosion rate and produce high-quality iron cannons.

The matter of blackmailing other vassal kings was handed over to Zhan Xingchang, and now Xiao Ming has devoted himself to the equipment department, and Chen Qi is bound to produce this artillery.

This time, when the barbarians went south, they would inevitably send a large army to prevent the barbarians from conquering Cangzhou, but they could only rely on the city's strong artillery to surprise the barbarians and retreat in panic.

After all, his artillery is not the torch of the Great Yu Kingdom, and the range of three to four miles is enough for the barbarians to drink a pot.

As Chen Qi said, after the failure of the previous days, the craftsman has mastered some skills.

However, the artillery has not been cast, and the artillery casting specifications have come out, Xiao Ming divided the artillery into 6-pound, 9-pound, 12-pound, 18-pound, 24-pound, 32-pound, and 42-pound guns.

This time, Xiao Ming's cannon was used to defend the city, so he naturally used heavy artillery, so he used an eighteen-pounder cannon, and the thirty-two-pounder cannon and the forty-two-pounder cannon belonged to a giant cannon, so there was no need at all, after all, the eighteen-pounder cannon was enough to be used as a naval gun.

And the higher the poundage, the larger and heavier the gun body, and the handling itself is a problem.

In one day, according to the design standards of the eighteen-pounder cannon, the equipment department made half of the clay cannon embryo, and the rest can only be continued tomorrow.

And the clay cannon embryo is still cast iron mold, and it will take at least ten days to cast the cannon.

It has been about ten days since I got the news that the barbarians are heading south, and it is estimated that it will take a month to produce the first cannon.

At this time, it is estimated that the time before the barbarians go south is only about five months, which is just his guess.

If the barbarians go south in advance, he will be really hard.

Because of this, he didn't dare to be idle during this time, and he didn't dare to delay after finishing this work, and when he returned to the palace at night, he thought about how to granulate gunpowder.

It is well known that the more powerful the gunpowder, the more powerful the artillery.

Nowadays, the ratio of gunpowder in Dayu is not very accurate in all aspects, but it is no secret that gunpowder is such a thing.

The material for the production of gunpowder was also very easy to get.

After returning from the Instrument Division and having dinner, Xiao Ming called Lu Tong over.

This gunpowder is a chemical matter, so naturally it will be handed over to Lu Tong to do, and the pothos and aster will also come to help, and the five of them are in the side hall of the palace, and lanterns are lit around it.

Xiao Ming had charcoal, saltpeter, sulfur in front of him, and a small scale, and while weighing the three things, he instructed Lu Dao: "Crush these three things into powder, be careful, this will explode." ”

Lu Tong's face turned pale, and his hands couldn't help shaking, since he studied chemistry with Xiao Ming, he realized that none of the things studied in chemistry could not kill.

Now Xiao Ming asked him to engage in such a powerful thing as gunpowder, which made him very stressed.

But thinking of the barbarians going south, he gritted his teeth and stiffened, this is the hatred of the country and the family, in order to eliminate the barbarians, not to mention making gunpowder, even if it is eaten raw, he also eats it.

Looking at Lu Tong gritting his teeth, looking like he couldn't get along with the gunpowder materials, Xiao Ming was afraid, he said: "Be gentle, the finer the powder, the better, don't use too much force, you can't kill this king." ”

(To be continued.) )