The gun body removed had not completely cooled down. While the gun body was still hot, the copper gun body was still relatively soft. The craftsman used a steel cone to drill a fire door at the back of the gun.

The cast gun body needs to be polished. The craftsmen used whetstone to remove the burrs outside the gun body, then wiped it carefully, and polished the cannon to a golden light, which was shiny.

The inner chamber was also polished, and the gun body was fixed on the workbench above the boring machine. The craftsmen shook the handle and turned the manual boring machine. The shaft of the head of the boring machine rotated, driving the head to the grinding wheel that extended into the boring chamber to polish the inner wall of the boring chamber. In a short while, the inner wall of the boring chamber was polished to be extremely smooth, without any flaws.

The grinding wheel is actually made of whetstone material. It is to polish the sandstone into a cylindrical shape, put it in the shaft to fix it, and when grinding the inner wall of the barrel, turning the boring machine can stuff the grinding wheel into the barrel for grinding.

The cast six-pound field gun was installed with gun mounts and gun vans. The gun vans and gun vans were made of solid wood. The gun vans were two large-wheeled gun vans. The gun vans were fixed to the gun vans. The rear of the gun vans had a hoe and a connecting device, which could be connected to the ammunition vans. With Zhao Peng's order, the craftsmen connected the gun vans and ammunition vans together, forming a four-wheeled carriage.

"Take two horses here." Zhao Peng ordered.

Two craftsmen went to pull two horses and hung the four-wheeled carriage on the horse. Then the two craftsmen sat on the ammunition carriage, waved their whips to beat the horse, and pulled the four-wheeled carriage and ran quickly. When turning, because the ammunition carriage and the cannon carriage were softly connected, a four-wheeled carriage with a front wheel that could turn, so they easily turned around.

The artillery was pulled to the launch site. The craftsmen untied the ammunition truck and drove the horses to the side. Zhao Peng and Zheng Sen personally pushed the artillery truck and pushed the artillery truck to the launch position.

"There is such a heavy artillery, and it is quite light to push." ​​Zheng Sen kept praising the manufacturing process of the artillery truck.

The workmanship of this gun truck is quite fine. The hardwood mount and gun truck, as big as a carriage, are applied with grease on the shaft to reduce friction. Zheng Sen discovered that the bearings are not the previous wooden bearings, but two round iron rings are placed at the connection between the axle and the body. The iron rings of the axle are placed on the iron rings of the body, and grease is applied between the iron rings and the iron rings.

"This is an iron sliding bearing, which makes it much easier to push. In the future, I will build rolling bearings, which will make it easier to push. It's just that rolling bearings are not easy to build, and they need high-quality steel to build them." Zhao Peng said.

After the artillery was mounted, the craftsmen punched the hoe into the ground, then put a fixed charge pack into the muzzle, pushing the fixed charge pack to the bottom with the push rod, and then stuffing a shell with a cork fixed at the tail into the cannon chamber to push the bullet rod to the bottom. Fixing a cork on the tail of the shell can not only enhance the sealing of the cannon chamber, but also increase the accuracy of the shell.

After loading the medicine bag and shells, the craftsman stabbed the iron vertebrae through the fire door, pierced the fixed loading bag, and then stuffed a medicine twist into the fire door, which completed the entire loading work.

The artillery was aimed at the target five hundred steps away. Zhao Peng used visual measurement to calculate the distance and personally adjusted the elevation angle of the artillery based on the amount of the charge pack. After everything was completed, he and Zheng Sen withdrew more than 20 steps away and ordered an apprentice holding a torch, "Image!"

The apprentice aimed at the medicine twist inserted into the fire door at the tail of the cannon and sent the torch up. A stream of white smoke came out of the medicine twist and quickly shortened into the fire door. Only a dull sound of cannons was heard, and a tongue of flame was spit out of the gun mouth, and the white smoke spread out from the fire door and the gun mouth. The black shells roared towards the target five hundred steps away at a speed visible to the naked eye.

The cannon shook violently and took a few steps back and stopped under the action of a flexible hoe. Because it didn't retreat much, the resetting work was much easier.

Looking from the artillery position, the wooden target was crushed to pieces and turned into countless wood chips and flew around.

"The starter hits! It's really accurate! Master Wang's ability to cast cannons is amazing!" An apprentice praised the accuracy of this cannon.

Wang Xin corrected: "Goudan, this is not the old man's credit. The cannon casting was cast according to Boye's method. The machine for polishing the cannon chamber was also built by Boye himself. The last one aimed at the target was also Boye. It should be said that the old man only put in a little effort, and the nine successes were all Boye's."

"Push the cannon to three hundred steps away." With Zhao Peng's order, the craftsmen pushed the cannon forward, pushed it three hundred steps away from the target, stopped, cleaned the cannon chamber, loaded the medicine bag, and loaded the solid shells. Zhao Peng adjusted the elevation angle, aimed the cannon muzzle straight at the target, and a craftsman ignited the cannon and hit the target accurately.

Gu Teng

"Retreat the cannon to an eight hundred steps." Zhao Peng ordered.

The craftsmen retreated the cannon eight hundred steps away from the target. Zhao Peng adjusted the elevation angle of the muzzle to about five degrees. Then the craftsmen loaded the medicine bags and shells and ignited the cannon. The shells were a little worse from the target. Zhao Peng adjusted the muzzle again, and the second shell hit the target.

After multiple rounds of tests, the end of retreating three miles away, the elevation angle of the muzzle was adjusted to a fifteen-degree angle. After igniting the artillery, the shell flew three miles away. However, at such a long distance, the shells had almost no accuracy and could not hit the target at all. Even if they adjust the aiming, the shells fell eight steps away from the target last time.

"It's so far, the fight is inaccurate." Zheng Sen said.

"It doesn't matter if the battle is accurate or not. If you shell the Jiannu formation, the eight-step error can completely hit the middle of the Jiannu formation and kill a piece of enemies." Zhao Peng said.

Then Zhao Peng took out a piece of paper and recorded the data on the paper with a charcoal pen: six pounds of solid bullet, the drug packaging dosage is 1.5 pounds, the elevation angle is zero, the range is 300 steps; the elevation angle is 3 degrees, the range is 500 steps; the elevation angle is 5 degrees, the range is 800 steps; the elevation angle is 0.8 octave, the range is 2 miles; the elevation angle is 12 degrees, the range is 2.5 miles; the elevation angle is 15 degrees, the range is 3 miles.

After writing, Zhao Peng made a form and handed it to Wang Xin: "The various elements of this gun are on this table. When using it, load the launching medicine according to the various elements and adjust the elevation angle."

After the solid shell was tested, Zhao Peng ordered a test firing of the flowering shell.

The weight of the flowering shell is lighter than the solid shell. The solid shell weighs six pounds, while the flowering shell fired by the six-pound cannon weighs only about four or five pounds, and the flowering shell fired by the twelve-pound field cannon weighs nine pounds.

The flowering shell of the six-pound cannon weighs four or five pounds, and the cast iron shell contains nine taels of new gunpowder and a large number of iron beads. After the shell explodes, it can scatter more than 200 iron beads and debris, forming a killing area with a radius of about ten steps.

The flowering bullet is also a cork bullet holder fixed at the tail of the shell, but there is a hole at the head of the shell, and a cork tube with a twist and a drug in it can be inserted into it. The fuze tube can be truncated according to the length of the distance.

Although the shells are lighter, the launching medicines filled with the fixed charge package for the flowering shells are also less, only 0.5 pounds, so the range is closer. The reason for reducing the launching medicines is because the shells of the flowering shells are hollow. If the chamber pressure is high, it is easy to cause the shells to explode in the chamber. Therefore, the launching medicines are reduced and the chamber pressure can only be used.

The six-pound cannon loaded with flowering shells and 15 miles away, fired at 15 degrees. The shell flew in the air for about three seconds and landed on the target target. After the shell landed, it jumped up. There was a loud "boom", a flash of fire, and a thick smoke rose. The scarecrow around the target was blown upside down, and the scarecrow at the explosion point of the shell was blown away directly.

Then, the elevation angle was changed many times and the test firing of the flowering fire shells was carried out at different distances. Finally, Zhao Peng made a table with pen and paper, which recorded the range of the flowering fire shells at different elevation angles, as well as the length of the cut cork fuze tube and other data.

Then the shrapnel shot was fired. The shrapnel was a hollow iron ball made of iron sheet with iron beads inside. There was an air inlet hole behind the hollow iron ball, and a hole was dug on the cork support at the tail of the shell, which was connected to the air inlet hole at the tail of the shell. After the cannon was ignited, the expanded gunpowder gas was poured into the shell through the small hole. After the cannon was out of the bore, the shell that could not withstand the pressure exploded in mid-air, emitting the iron beads inside, and flew forward like a heavy rain, and could fly about fifty steps.

This means that the effective range of the shrapnel is between 130 and 150 steps.

The final test shot was conducted. The shot shot was a ball made of bamboo, with thick paper on the outside and iron beads inside. The caliber of the shell was smaller than the barrel, so that the shell could be inserted into the muzzle, and the shell could be rolled directly into the barrel chamber. Just push the bullet rod gently to the bottom. The caliber of the shell was smaller than the muzzle, and there was no cork bracket. Therefore, after loading the package, a wooden board needed to be inserted to seal the barrel chamber to ensure the sealing of the gunpowder gas.

After igniting the artillery, the gunpowder gas expanded violently in the barrel, quickly tearing the shells made of paper into pieces, and the iron beads in the shells were sent fifty steps away by the gunpowder gas.
Chapter completed!