Release that Witch

Four days later, the North Slope Mine burned the backyard.

Two deep holes were dug in the ground in the yard, each of which was round and narrow. The inner diameter of the front section is approximately twenty centimeters and the inner diameter of the rear end is expanded to twenty-six centimeters. These holes are the mold Roland intends to use to cast the shell. The inner wall of the hole has been baked by Anna, and the surface soil is sintered into a whole, as if a layer of shell is attached. The medicine chamber is facing down for better wall quality when casting, and the more scum and air bubbles are contained above. The size of all caves is calculated by shells. He roughly remembers that the so-called six-pound gun and eight-pound gun in history are named after the weight of the shell. So he first poured out a few twelve pounds of iron balls, then according to the iron. The ball diameter plus the barrel wall thickness is used to calculate the inner diameter of the mold.

In the absence of a measurement tool, Roland simply customizes the standard. He intercepts a piece of iron that is about the same width as his fingerless nails and sets it as a basic unit, one centimeter, to make iron bars of other sizes, and engrave the points. Segment line.

The diameter of the twelve-pound iron ball is about 12 cm under the measurement of a rough iron ruler. He sets the thinnest wall thickness to four centimeters. The back-end drug room is expanded to seven centimeters in order to prevent bombing. Thus, the inner diameter of the mold is obtained. As for the length, although he knows that the artillery has a diameter, he has the impression that only the main guns of the battleship and the main tank are left. As for the antique front-loading gun, he really does not know.

Considering that the shorter the body, the lighter the weight, and the more material, Roland took a wave and took a value of one meter five. If the test results are not satisfactory, adjust them later.

When the artillery was first invented, it was made of iron bars and iron powder on the wooden core material, and then reinforced with iron hoops, and finally burned the core material in the cannon, just like the storage barrel. Roland certainly knows that this kind of artillery has the risk of leaking and exploding, so the process of integral casting and boring machine drilling is directly adopted. For steam boring machines, it is not difficult to drill a six-pound gun or a twelve-pound gun.

In the spirit of justice, he naturally chose a 12-pound gun with a larger muzzle and a thicker barrel. Going up, it is not easy to use as a field gun. It doesn't matter whether the weight of the shell is calculated by shot or by the iron ball. It can be played. After all, he is learning from history, not playing with copy models.

"Get started," Roland said, taking a deep breath and talking to Anna. The latter nodded, grabbing a steel ingot and hanging over the hole. When the green flame ignited, the ingot quickly turned red and then melted, forming a small molten steel waterfall that flowed into the hole. The surface of the molten steel is reddish-orange, and the inner core turns into incandescent, and its brightness is difficult to see directly. In order to protect the witch's vision, Roland also deliberately set up support at the hole. She only needs to determine the position in advance and rest her arm on the support pad so that she can watch the flow into the hole without staring at the molten steel.

These steel ingots are slowly accumulated in peacetime. The power of Anna alone cannot open the era of large steelmaking, but small batch production is not a problem for her. The most difficult temperature level is solved after using stainless steel. The method can get better quality steel.

This is why Roland dared to customize the size of the barrel. Steel cast guns clearly have higher strength than cast iron barrels and bronze barrels. Even if the size is wrong, the artillery will not be easily blown up.

The molten steel gradually rose, and the ingots that were saved were also rapidly decreasing. It was obvious that Roland could not help but feel heartache. When will he wait until he can build a stack of chimneys and blast furnaces on the territory to refine the inexhaustible steel? For a long time, steel production was one of the criteria for measuring the strength of the powers. He now feels it.

Filling the two molds, Anna's cheeks became red. Roland smashed the handkerchief and gently wiped the sweat from her nose. At the beginning, Anna would also show some resistance. Now she has been motionless and closed her eyes to let Roland Shi.

The drooping bangs dyed a red edge under the molten steel, and the soft neck made people want to take a bite. When you are condescending, the half of the slender collar that is exposed through the collar will enter your field of vision. Close to the door, but also smell the scent of her body.

"Cough, well..." Roland put away his handcuffs and took back the emotions that he was ready to move. "Come here today. Good job, I will tell the kitchen to reward you with a black pepper steak for dinner."

Not yet, he thought that it would be inevitable that there would be a suspicion of being in danger. Wait a second, wait until she is truly free...

Anna opened her eyes, and although the sweat had been wiped off, her face seemed redder than before. She nodded to Roland and gently responded.

*******************

In the next few days, Roland traveled between the castle and the North Slope mine.

In addition to the barrel, he also needs to make a sufficient amount of sickle.

This tool for drilling is similar to the barrel, and its diameter is exactly the same as that of the shell. After it is removed from the mold, Anna heats it again and processes it against a hammer. It is very different from the shape of a normal spiral knife. At first glance it is like a blunt iron bar. The only difference is that the top of the head is knocked out of a gap for discharging metal debris. Finally, quenching increases the hardness of the file.

Unlike the high-precision drills of modern trampolines, Roland only needs a steel rod that can punch holes. Considering the high wear rate, he and Anna made five simple sickles in a week. Prior to this, the steam boring machine has fully verified its ability - the production of pig iron barrels has rapidly increased from two per month to ten per day.

When everything is ready, the artillery is removed from the pit by the miners, the surface scum is removed, and the cart is transported to the blacksmith shop.

These two artillery pieces almost exhausted the steel that Roland had accumulated, and it was not an invaluable treasure. On the way, the prince ordered Carter and the two knights to take care of the whole process, which made the Chief Cavalier feel a little more. Who will come to steal such a dead thing?

At the request of the prince, the blacksmiths leveled and polished the surface of the shell. After the stone was polished, it was sent to the backyard of the castle. At this point, the two round solid steel bars are dark gray in appearance, giving off a thick metallic luster.

Roland can't wait to change the sickle, and Carter fixed the blast in place, so that the top of the cutter head is just at the center of the steel bar.

In the face of this historic moment, Roland pulled the valve of the steam engine. The sickle began to run slowly, and soon it rose to a steady speed.

"Into the knife!" shouted the prince.

The chief knight pushed the sliding base to control the depth of contact between the projectile and the file. When the cutter head touched the barrel, the harsh noise emitted suddenly overwhelmed the steamer. The lard that acts as a lubricant is squeezed into the hole, and black foam and curled wire emerge. The onlookers have quit the wooden shed, and only one person still insists on staying in the same place. It seems that for her, these black machines are more beautiful than any scenery.