The Franc cannon in front of him, which should now be called "Shenwei", weighs about 300 pounds, and the slender female gun is 3 feet long, plus a sub-gun that has been installed on it, there are a total of five sub-guns. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 The INFO gun body is made of copper, with a front sight and a shutter behind the disparate one, while the lower part of the cannon is equipped with a gun carriage that can be adjusted up and down, left and right.

White put his hand on top of the mother's gun, felt some heat, and turned his head to look at Li Tai.

"In the past, I used mud to make molds, and the machine guns that came out were good at everything, but they were easy to blow up, but now, according to what you said in the letter you sent back before, you have begun to experiment with iron to cast molds, and the finished product is the one in front of you. The military department has tested it many times, and it is very stable! ”

Li Tai dragged the white chess pieces to the hot workshop, where the production of another Shenwei was underway. The molten iron and copper splashed by Mars are mixed together, and then the iron fan casting and water-cooled technology that came out in later generations are used to make the iron fan in the cannon chamber hollow, and water is added to it to strengthen the ability of the cannon chamber to engage in high temperature and high pressure, and make a very high-quality product.

"The ratio of iron and copper was tried a few more times to find the best matching ratio. The caliber of the shell should be appropriately reduced, and you can try to wrap the shell with leather to increase the air tightness. In addition, the amount of ****** is a little too much, reduce a little, and then accurately control the dosage, and usually do more lubrication, cooling and cleaning of the barrel. While looking at the experimental data on the notebook, Bai pointed to the data with gaps on it and talked to Li Taidao.

Li Tai took a notebook, wrote down everything that White said, and then handed it to a young craftsman next to him, asking him to go back and discuss with other old craftsmen and come up with a specific improvement plan as soon as possible, and then dragged White outside with him. The two walked to the edge of the flat ground at the top of the mountain. Looking down from here, the cliffs are bottomless and dizzying. On the distant mountain peaks on the opposite side, traces of fire can be seen in the distance, and they are black.

Li Tai asked five people to bring in five guns, wanting to demonstrate this newly improved Shenwei cannon on the spot.

Flames erupted from the cannon, and the deep roar and the crash of the power back seat made people's hearts tug at once. Immediately afterwards, on the mountain peak a few hundred meters away, a huge fire gushed out from the mountain, and the huge explosion of cannonballs rang out, constantly echoing in the mountains, shaking everyone's ears "buzzing".

Immediately afterwards, the soldier in charge of firing the artillery hurriedly replaced the gun according to the data reported by Li Tai, and then constantly adjusted the direction, and sent out four shells one after another, which hit the four peaks a few hundred meters away. For a while, artillery fire rose into the sky on the opposite mountain peak, and a mountain fire rose, and someone here had already begun to prepare tools to extinguish the fire.

Bai Qi nodded with satisfaction, in this era, the emergence of this kind of hot weapon is enough for the Tang Dynasty to deal with all kinds of enemies.

"Kamui is good, but it's too bulky to be light. Is there a better weapon to wear on your body and have the power of such a shell? Lee Tae-gu looked at the white chess with wide eyes, his eyes full of desire and persistence.

White gave him a blank look, turned around and went back to the office.

Li Tai took out a map from the room, spread it out to be the size of half a room, and spread the map on the ground, and Li Tai and Bai Qi stood on the map.

"The mines in Datang that you asked me to find have now found so many, especially coal mines, iron mines and copper mines," Li Tai circled his hand on the map of Datang and said proudly: "The mineral reserves are very huge, with the approval of my father, the Ministry of Industry and the Ministry of Households have begun to send people to carry out preliminary exploration, I believe there will be news soon." At that time, we will have more resources for development and research! ”

Bai Qi looked at the map, and the main minerals on it were distributed in the Central Plains, and the area south of the Yangtze River was basically blank, so he pointed to the southern region of the later generations and said: "If you can, I suggest that you have the opportunity to develop this area, which is a treasure land of feng shui, and its value is no less than that of a Goguryeo!" ”

Li Tai's eyes lit up, he took out his pen, squatted down, drew a large circle in the area pointed out by White, stood up, glanced at it with satisfaction, and then put away the map again, and took White to each of the laboratories arranged here.

Because of the early appearance of coal, Li Tai, under the guidance of Su Mushi, has initially greatly increased the combustion temperature in the past two months, and correspondingly, the smelting technology of iron, copper and other minerals has also been improved by leaps and bounds.

In the laboratory, experienced craftsmen are taking their apprentices to study and experiment with the topics given by Li Tai.

At present, the military department of the Ministry of Weapons and Weapons no longer uses the traditional clay firing mold, but uses all iron molds, and the things made are more accurate, practical, durable and beautiful.

White used a metal clip to pick up an iron gear with a diameter of only about two centimeters, and after careful observation for a while, he found that it was basically able to achieve symmetry, and when doing the experiment, the bite between it and the matching gear set was also very tight, and it was sturdy and durable, so he couldn't help but nod.

Metal rulers, compasses, tongs, wrenches, and other conventional, but necessary, tools were standardized and manufactured. What surprised White was that a vernier caliper was actually made by an old craftsman, although it was with the data provided by Li Tai and Su Mushi, but you must know that these data are very rough, although the vernier card in the hand is not as accurate as in the previous life, but it has been accurate to a unit of ten millimeters.

The same modern experimental object was laid out in the research room of the Weapons Development Department, placed in a transparent glass case, shining with a cold metallic light, which suddenly gave White a sense of time and space.

Looking at the vernier caliper in his hand with the words on the fly's head written in small letters, "Maker Li Tai, Su Mushi, Qiao Laosi", Bai Qi suddenly understood why Su Mushi left so many marks on this development department.

Since she's having so much fun, shouldn't she take a bigger step too? For example, leave something even more shocking.

Bai Qi laughed, then pulled Li Tai back to the office, took out a few pieces of paper and pencils, and scribbled on them. An hour later, Bai handed over a large pile of drawings to Li Tai, who had been watching with his neck stretched beside him, and then sat down on the soft sofa by himself, poured himself a cup of tea, and drank it slowly.

"What is this?" Li Tai took the drawing, pointed to a long and bulky thing on it, and asked suspiciously.

"The train that travels thousands of miles a day will be our big goal for development in the future!" (To be continued.) )

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