The inspection that Liu Xingli said was not to immediately drag the newly baked cannon out for test firing, but to check the shape and size of the product against the design drawings to see if it met the requirements of the design standards. (Baidu search update is the fastest and most stable)

Yan Chujie took out a tape measure, and began to check each size of the two guns against the design drawings, the length, caliber, barrel wall thickness, and barrel depth. Five minutes later, Yan Chujie said that the dimensional accuracy of the two guns had fully met the design requirements, and there were no obvious flaws in their appearance.

However, the strict inspection procedure is not finished here, and the Ministry of Industry has also brought a portable ultrasonic flaw detector to check whether the two guns have internal defects such as cracks and pores. This is not a fuss made by the Ministry of Industry, but Liu Xingli took the initiative to ask for it. This is the first time for everyone to cast a cannon, and Liu Xingli is not completely sure about it, if there is any mistake, the consequences may become very strict. Of course, if the quality of these two guns is up to standard, then today's cannon casting process will be carried out as a standardized procedure, and there will be no need to do such a troublesome detailed inspection when casting guns in the future.

While the people from the Ministry of Industry were doing an inspection, Yan Chujie asked Liu Xingli: "I touched the gun chamber with my hand just now, and I feel that it is flat, but it is not smooth, should this gun chamber be treated with boring **?"

Liu Xingli shook his head and said: "The breech of the smoothbore gun does not need to be handled so carefully, after the finalization, we will use the central cooling casting method, and the finish of the breech will be better than now. Having said that, there is no way to deal with it now, our horizontal boring** is still on the 'New World', I don't know when it will come in handy. ”

Yan Chujie nodded when he heard this, turned his head to Bai Kesi and said, "Mr. Bai, your machine ** has been loaded on the ship and not unloaded, when will it be put into use?"

There was a small metal processing factory before the crossing of the White Crossing, so almost all of the processing equipment of the Executive Committee was organized by him. Bai Kesi heard Yan Chujie's question, and his expression was also very helpless: "The unloading ship can be unloaded at any time, but the question is where do you use it when you unload it? Before installing the machine, the ground of the plant has to be hardened, and now almost all the people in the Ministry of Construction are busy with the hydropower station, and the cement production capacity is not enough, so no one can help me build a plant! (Baidu search update is the fastest and most stable dìng) (.)"

Several technical backbones of the Ministry of Construction did not come here today, and only Tao Donglai was still on the job in the Ministry of Construction, so the work of explaining for the Ministry of Construction fell on his head: "This hydropower station project can't be fast, although the labor force is enough now, but the cement and concrete have to take time to wait for them to dry, and it is useless to be in a hurry." ”

Yan Chujie sighed and said: "Last night, I said that it was so lively, and I was scheduled to use a breech gun, and I was so excited that I couldn't sleep at all when I went back after the meeting, but in the end, I could only use this kind of clumsy old-fashioned artillery." ”

Tao Donglai patted him on the shoulder and comforted: "Okay, these old-fashioned cannons are not made in vain, they will be used to train artillery in the future, and it is still good to practice basic skills and tactics, and when the artillery is replaced, it can also be sold to the Ming Army." ”

The two guns themselves are not large, and the people from the Ministry of Industry quickly completed the flaw detection and inspection, and no abnormalities were found. At this point, the on-site acceptance stage of the artillery has come to an end, and the next step is to pull it to the field for test firing.

In order to avoid causing unnecessary disturbances, the shooting range set by the Military Police Department was not near Tian Du's No. 2 base, but was placed on a large sandbar east of Shengli Harbor and at the mouth of the Tian Du River. After the last pirate attack, Yan Chujie led a team to chase down the escaped pirates in that place, and found that this place was flat and uninhabited, and the east side was full of mountains, which was very suitable for setting up a shooting range. So under his suggestion, the Military Police Department used this place as a test range for artillery and musket in the near future.

Before leaving the factory, the two guns were finally weighed over the scale, both around 220 kilograms, and the weight difference was less than 200 grams.

Several local laborers in the metallurgical workshop used wheelbarrows to deliver two cannons and more than 30 shells to the dock and loaded them onto the ship, and the irrelevant people dispersed, and the only people who had to go to the shooting range were basically the military police department and a few chemical teams.

The reason why there are people from the chemical team is that they have to go to the scene to see how well the gunpowder is used. The chemical team was a little luckier than the people in the metallurgical workshop, they had already received a notice from the military police department a few days ago that the trial artillery would fire gunpowder, and a group of people hurried to hurry up under poor conditions, but they still handed over 50 kilograms of granular black powder as scheduled before the artillery test firing, and for ease of use, they divided the packages according to 250 grams per package.

In terms of the scientific and technological level of this era, silk is undoubtedly the most suitable material for making artillery projection kits, but at present, there is no channel to import a large number of silk, and it is impossible to use this expensive commodity to make zuò medicine packs, so it can only be replaced by coarse paper for the time being. But even so, it is already at the international advanced level. You must know that the most powerful gunner in the Ming Dynasty is only based on personal experience, and before launching, he roughly judged that he needed to charge a few catties and taels, and did not have the concept of quantifying and fixing gunpowder and making standardized medicine packs.

Of course, the power of the products taken out by the chemical team is still a calculation on paper for the time being, and the real use effect can only be reflected in the actual launch. But at least in the two directions of gunpowder granulation and fixed-assembly, the chemical group has been far ahead of its peers in this era.

In addition to saving gunpowder, saving time and increasing the firing speed of artillery on the battlefield, the use of standardized fixed gunpowder also has two very important roles.

The first is to determine the most ideal charge for the artillery. The so-called ideal charge is that when all the gunpowder in the chamber is burned, it just pushes the shell out of the muzzle. If the charge is too much, the gunpowder has not been fully burned, and the shells have been discharged, then part of the gunpowder is actually wasted. If the charge is too small and the shell is still in the chamber when the gunpowder is burned, the friction between the shell and the chamber will reduce the muzzle velocity of the chamber.

Considering that the gravitational effect of the shell will vary depending on the firing angle of the gun, this ideal charge is not static, so it is even more necessary to order the gunpowder pack to simplify the operation process of gun firing.

The second effect is that with the help of the ideal charge, it is possible to develop a very practical firing table, that is, the relationship between the angle of shot, the charge and the firing range. In actual combat, the gunners can effectively hit the target at a certain distance as long as they directly refer to the artillery firing table and adjust the firing angle and charge, and the fixed gunpowder can be said to be born for this artillery tactic. With this tactic, the gunners no longer have to rely on experience when firing their guns, all they have to do is determine the range of fire, and then shell the target according to the firing table, and the real lethality of the artillery on the battlefield will be greatly enhanced.

This method of adjusting the charge to calculate the range and give full play to the performance of the gun actually appeared in Europe as early as the 16th century, and European gunsmiths even attached a scale to the factory gun to measure the amount of gunpowder. At the end of the Ming Dynasty, while the Portuguese sold artillery to China, they also exported their artillery tactics, and sent some artillery instructors to the Ming army to teach this more advanced combat concept. However, gunners who mastered this technique immediately regarded it as a unique secret technique to keep their jobs, and the "advanced technique" of guiding zhì was not widely spread among artillery units at all.

Along with the artillery, there was also a gun carriage sent by the carpenter's room. Because the size of the artillery was determined only in the middle of the night last night, only one gun carriage was rushed out of the carpentry workshop, which had been heavily involved in production recently. However, the military police department was very satisfied with the sturdiness of this gun mount, and its weight alone reached nearly 200 catties, and four solid wood wheels were installed underneath to facilitate movement. Cai Hongzhan even patted his chest and slapped the ticket that if the gun carriage fell apart during the test firing, he would immediately resign from his current position as a carpentry foreman. Of course, everyone didn't take his gambling curse to heart, and the crossing crowd was such an old carpenter, if he quit where to find someone to sit in the carpenter's house.

In order to determine the range and accuracy of the artillery, people from the Military Police Department had already come here early in the morning to set up earthen targets at different distances. From 300 meters to 1,000 meters, every 100 meters there is a half-meter-high, three-meter-long mound as a target and distance marker. The mound is marked with white lime, which can be clearly seen from afar. Behind the artillery erection position, a small reverse slope was specially made of earth mound, so that the artillery carriage could reset itself after the gun was fired.

A semi-encircled U-shaped trench was also dug behind the artillery position, which was for safety reasons, allowing observers to enter the trench during the artillery test firing and effectively cover their bodies.

Seeing that everything was almost ready, Tao Donglai signaled that Yan Chujie could start the artillery test firing. In addition to Yan Chujie, the gunners who were in charge of testing artillery today, there were also Wang Tom, Qiao Zhiya, and Morgan, who had experience in firing front-loading artillery.