The first Spring Festival after coming to this era is coming soon. The whole Liaocheng is in a happy and peaceful atmosphere. Due to the construction of a large number of industries in Liaocheng, the wages of many workers are not low, so Liaocheng is now a relatively developed city. The people live and work in peace and contentment. The establishment of Liaocheng University has also attracted a group of experts and scholars to cultivate more talents for various disciplines and industries.

Tian Zheng is a very careful person. He had long expected that the Japanese would make trouble at the time of the Spring Festival. When he put forward the Spring Festival combat readiness plan, all the high-ranking officials in the regiment unanimously agreed. During this period of time, the confrontation with the Japanese agents made these senior leaders of the security regiment realize the threat of the Japanese agents.

Since the last time the directors of various factories held a meeting together, Tian Zheng handed over the combat readiness of the whole regiment to the three deputy regiment commanders to take charge of it together. Yan 13 and Ma Qi lacked combat experience with Japanese agents, and unanimously agreed to have Deng Li as the main commander and leader.

Tian Zheng plunged headlong into the arsenal. With high-quality raw coal and high-tonnage forging presses, steel mills can already produce high-strength steel. Tian Zheng designed and manufactured the artillery according to the strength of the steel produced by the steel plant.

Heavy artillery squadrons and air defense squadrons can now only put up shelves, and not even the main weapons! This is not in line with Tian Zheng's original intention. In his opinion, each squadron pulled to the battlefield is an independent squadron capable of quickly maneuvering operations! And there can be timely contact with each other, as a squadron of long-range fire support for the wolf tooth group!

If you want to form a squadron of heavy artillery that can move quickly, you need to have enough lethality of artillery! Also be mobile enough! However, the lethality of large-caliber heavy artillery is available, but the cannon body is very heavy, and the construction of the artillery position will take a lot of time, and it is impossible to maneuver quickly! If it is a small artillery such as a 75mm mountain gun that can quickly maneuver, the mobility can be satisfied, but the lethality is very insufficient!

Later generations of heavy artillery units often used large-caliber artillery with a caliber of more than 155 mm to maneuver with high-horsepower truck artillery trailers. The time to build an artillery emplacement is about two hours at the earliest. At present, the steel strength of my steel plant is still slightly insufficient to make such a large-caliber artillery. However, guns with a caliber of less than 120mm are not a problem! As the chief engineer of the Equipment Research Institute, Tian Zheng is well aware of the performance parameters of these conventional weapons. He compared the strength of the steel and knew what kind of artillery could be produced successfully!

If it is a 105 mm gun, although the lethality is not the maximum, at present, it should be enough. The Japanese army also used a large number of 75 mountain guns or field guns, and was only equipped with a small number of 105 caliber heavy guns. And it is possible to expand the size of a company of the original heavy artillery squadron into the size of a reinforced battalion, using troop carriers as traction power! The gun body adopts a mechanical roulette turret, which can quickly achieve the purpose of adjusting the firing elements. The gun body adopts hexagonal brackets, and each bracket has a square base with a side length of 60 cm at the bottom to achieve the purpose of rapid erection. The wheels of the artillery base are the wheels of troop carriers, and the balance performance of the artillery in towing by manpower should be designed to ensure maximum service to the war.

The shells were made of black sorkin as explosives. Although Tian Zheng has asked experts in Liaocheng to develop TNT that can be industrialized in mass production, Tian Zheng only plans to use TNT for a few purposes. For these shells, the use of new explosives can indeed increase the power, but because they are not familiar with it, they may cause unstable factors such as duds or explosions during transportation. Tian Zheng could not have allowed this to happen. So he wants a heavy artillery unit that is absolutely free of any destabilizing factors all the time!

With high-strength steel, design drawings of later generations and Tian Zheng's deep understanding of the performance parameters of these conventional weapons, the first 105mm howitzer was successfully manufactured half a month later. To this end, Tian Zheng also specially transformed the lathe equipment in the special small workshop of Liu Tianxing in the arsenal!

After all, those old-fashioned lathes are too backward, even if they have been transformed by Liu Tianxing, they can only make guns, and for the strength of large-caliber artillery, these old-fashioned lathes will immediately dull the turning knives as soon as they go down.

On the day of the artillery test, Tian Zheng personally operated it, using shells produced by him and Liu Tianxing. Because it is a laboratory trial manufacturing, the output is not large, but the quality is basically meticulous without the slightest flaw.

On the day of the artillery test, Tian Zheng only brought the high-ranking and heavy artillery units of the regiment. When these people saw that after Tian Zheng had adjusted his shooting Zhu Yuan, the fireball that erupted from the barrel of the artillery roared like a meteor and fell on the predetermined target, blowing up an exhaust house that had been erected as an enemy command post to pieces, and everyone couldn't help but let out an exclamation!

It worked!

Everyone couldn't help but cheer! With such a powerful weapon, what kind of little devil are you afraid of? A cannonball sent them back to their hometown to meet the emperor!

Tian Zheng gave a strict gag order to everyone present. Whoever dares to leak secrets will be shot on the spot by those who are discovered! The development of the security regiment must be kept strictly confidential! If others find out that the security team can produce such a powerful weapon, it will inevitably attract the prying eyes of other forces. Maybe by the time he brought his troops and weapons and equipment to the battlefield, he would have been forcibly plundered by his own countrymen.

Deng Li doesn't have to worry. For so long, she has fully integrated into the role of deputy head of the security regiment. Every time I reported to the Nanjing government, I did so selectively. Even sometimes he will show the content of the report to Tian Zheng. But the real threat of leaks from the security team is on another person!

"As long as you can let me develop with peace of mind, I will not treat you badly in the future! If you want to force a grab, then I don't mind changing positions in certain positions! ”

Tian Zheng said secretly in his heart.

His gaze inadvertently swept towards the high-level members of the security group, and the cold light that was inadvertently revealed made these high-level people believe that Tian Zheng could definitely do what he said! Deng Li's heart was a little uncomfortable. There are many people who know that she is sent by the Nanjing government, and there are also a few people who know that she is a military commander. She felt that this was Tian Zheng's warning to her. So some loss.

Deng Li said secretly in her heart, can't you see my loyalty to the security group for so long?

But apparently Deng Li is thinking too much. Tian Zheng didn't deliberately target anyone, but just swept his gaze naturally. But it seems to be specifically aimed at someone!

After the successful trial production of heavy artillery, Tian Zheng handed over the task of producing heavy artillery to Liu Tianxing. Liu Tianxing is indeed a talent, and he can endure hardships. He didn't have much of a high education, and his knowledge system was a little weak, but he was willing to work hard, and when he encountered something he didn't understand, he would often check the information by himself or ask the experts and scholars of Liaocheng University. And Liu Tianxing is very smart, he always divides what he doesn't understand into unrelated pieces to ask, so that he can ensure that the content of the drawings will not be leaked!

Now Liu Tianxing can already stand alone and be responsible for the manufacture of many weapons. As long as Tian Zheng gives him specific parameter performance requirements and has enough raw materials, he will be able to make it! What's more, this time Tian Zheng was developed with him, he participated in the whole process, and there was a perfect sample there!

"In a month, I want forty heavy guns and a thousand shells. It is required that no artillery piece be flawed, and not a single shell can be a dud! Can you do it? Tian Zheng asked solemnly.

"Report to the head of the regiment and promise to complete the mission!" Liu Tianxing replied loudly.