After handing over the production of heavy artillery to Liu Tianxing, Tian Zheng began to immerse himself in the study of anti-aircraft weapons. Most of the planes of this era had wooden wings or wings wrapped in iron sheets. The weapons on the plane are mainly machine guns and throwing bombs. As for the weapons of air defense, most of them are anti-aircraft machine guns. As for the anti-aircraft gun, with the current level of skill, the hit rate of the airplane is pitiful. Moreover, the cost of construction is high, and it is more inconvenient to carry than an anti-aircraft machine gun.

Relatively speaking, the development of anti-aircraft machine guns was not very difficult. It is basically okay to mainly solve the bomb supply device and heat dissipation device. Due to the consideration of lethality and penetration, large-caliber bullets are required for bullets. Tian Zheng chose a 12.7mm caliber. For no other reason, now the machinery and equipment of the arsenal can produce bullets of this caliber, and they can be directly put into production without renovating the production equipment. The ammunition is fed by a metal chain and a trachea pressure feeding method, which is somewhat similar to the ammunition supply of the Bayi bar automatic rifle. This method has an obvious advantage, that is, it is highly reliable, even if there is a jam or a dud, you only need to pull the bolt again, and the next bullet can be sent into the magazine, which can quickly restore firepower. Of course, the disadvantage is obvious, as the rate of fire of the machine gun is slower than that of the Japanese electric feeding method of rows of bullets. Probably only two-thirds of the rate of fire. However, this is enough for an anti-aircraft machine gun. As for the heat dissipation device, it is a water cooling device. Such a device is more reliable, much more reliable than air cooling. The air-cooled device needs to rest after a period of continuous firing, because the air-cooled heat dissipation cannot dispel the continuously rising barrel temperature. The water-cooled device, on the other hand, has at least twice as long as the air-cooled device. However, this requires that the soldier operating the anti-aircraft machine gun must always have water in the water bottle to avoid the problem that the water cannot be cooled after it is evaporated.

Because it was made by Tian Zheng alone, and all aspects of the anti-aircraft machine gun were improved by Tian Zheng, it was not until two weeks later that Tian Zheng completed the manufacture of this anti-aircraft machine gun, and there were still 3,000 rounds of ammunition.

In the test of the anti-aircraft machine gun, because he did not deliberately make an air target with a hypothetical target, Tian Zheng did some tests of accuracy, tests of the elevation angle of the shot, and tests of weapon parameters such as continuous firing time.

Looking at the summarized parameters, Tian Zheng smiled with satisfaction.

Production of a hundred anti-aircraft machine guns! Put one on every truck of the Rapid Maneuver Unit! A million rounds of ammunition! Each anti-aircraft machine gun is regularly equipped with 10,000 rounds of ammunition! The equipment squadron is responsible for the follow-up supply after entering the battlefield!

This anti-aircraft machine gun was intended by Tian Zheng to be used on a troop carrier. Anti-aircraft fire after being detected by enemy aircraft as a fast maneuvering unit! If necessary, you can also adjust the elevation angle of the shot and change it to a flat fire as an attack on ground targets!

Tian Zheng managed to get thirty troop trucks from Han Fuqu! In this way, the security regiment has seventy troop transport trucks, which is more than the vehicles of a division in the Central Army of the old Chiang's descendants! But the price to pay is also huge! Tian Zheng almost only got one layer of dividends from the official rifle order, and the rest was left to Han Fuqu!

"Brother Yan, you have a wide range of roads, see if you can get a car from other channels? No matter what kind of car it is, as long as the price is fair, we will accept it! Tian Zheng said to Yan Shisan.

"Commander, it's okay for me to get some long and short guns and the like, but there is no way out for these big items. However, some brothers in the black market said that if you want to get a big item, you have to find those foreigners who do business in our Huaxia! For example, a large part of the weapons and equipment of the warlords in many places were sold to them by those foreigners! Yan 13 said.

"Hmm. Okay, I know what to do. In this way, when you and Deputy Head Deng have nothing to do, go and find a way in this regard! We don't have the ability to produce vehicles yet, so we can only rely on external forces! This is your main task during this time. As for the issue of money, Deputy Head Deng is in charge of finances, and let her look at how much money is still in the account, but she can use it vigorously, and don't be afraid of running out of money. It's impossible for us to be short of money! Tian Zheng said to Yan Shisan.

"It looks like it's time to start developing your own auto industry!" Tian Zheng thought secretly in his heart. Even in the developed years of the later generations, Huaxia Kingdom's engine technology has always been only in the middle of the world's world, and those cutting-edge engine skills, Huaxia Kingdom still failed to study them! There's no way around it. Historically, China gradually established its own automobile industry base in the sixties and seventies! Moreover, the early development was the kind of one that relied on Soviet aid, and later it was a joint venture with foreign capital to obtain technology, and the joint venture situation continued to exist until Tian Zheng crossed!

Tian Zheng collected and sorted out the information about the engine technology and transmission technology of memory, as well as the information of other automobile-related industries, and carefully sorted out the information and handed it over to the experts of Liaocheng University as a research topic. The small problems that were given to them before have basically been solved by them. Although their research ability may be less than that of those experts in later generations, and there will be a gap in equipment, etc., but they have general theoretical support, as well as the direction and results of research, but it does not take much time to find the research of this process!

The top scholar of Liaocheng Academy is an old man about sixty years old with gray hair, named Zheng Xuemin. Although this Zheng Xuemin is past the age of sixtieth, it is a spiritual talk, and a pair of highly myopic glasses with thick glass lenses on his eyes, as soon as they meet, they give people a strong pedantic literati atmosphere.

"Mr. Zheng, I'm glad to be there!" As soon as Tian Zheng met, he smiled at the old man wearing a robe with the atmosphere of the Qing Dynasty.

"I heard that the head of the regiment has done a lot of important things for the country and the people, and the head of the regiment is very knowledgeable, I thought that the age of the head of the regiment must be not small, but I didn't expect to see it today, sure enough, the hero does not ask about age, and suddenly feels that the old man is old!" Zheng Xuemin also said enthusiastically.

"Dare to ask the head of the regiment to come today, but is there any research task to be assigned?" Although Zheng Xuemin is old, his enthusiasm for knowledge is much higher than that of many young people.

"Ha Lu Ha! Mr. Zheng is too direct! But I'm also a rough guy and like to go straight. Come to your Liaocheng Academy, it is definitely nothing to go to the Three Treasures Palace! Tian Zheng replied with a smile as he followed everyone into the school.

"Commander, is it too difficult to study this topic? Most of us have learned about chemistry and some physics, but it will be difficult to take on such a big topic! As soon as Zheng Xuemin heard Tian Zheng say that he was going to conduct research on automobiles, he immediately said. He was afraid that Tian Zheng's recent development had been smooth, and he had the blind and arrogant self-confidence that young people often have, so he carried out some unrealistic direction commands.

"Mr. Zheng doesn't have to worry about this problem. Since I have asked everyone to study this topic, it is certainly up to the grasp. I have a copy of the car side here. There are detailed parameters and standards inside, as well as some manufacturing processes. There are also several small engine design drawings that you can use as a reference. What I'm asking you to do is to design a more powerful engine and complete the manufacturing process of the car. I also have a few drawings of the gearbox, but what you need to do, in fact, is not a lot. I don't think this is a difficult task for you, right? Tian Zheng said and took out the information he had sorted out.

When Zheng Xuemin heard this, he responded with a smile, "In this way, it shouldn't be difficult." The research topic assigned by the head of the regiment last time also brought so much information, so that we people should not be called research, but should be said to study the knowledge of the head of the regiment! I really don't know how old you were when you started studying, Captain Ludao? You alone know more than all of us combined! ”

Tian Zheng hurriedly waved his hand, "I just have the opportunity to learn more Western knowledge than you." When it comes to real knowledge, especially about the traditional cultural knowledge of our Huaxia country, I'm afraid that any one of you will come out knows more than me! We should say that we have our own strengths, and we are just learning from each other and improving each other! ”