As soon as Yang Wei returned to Shanghai, he immersed himself in the warehouse and used the mechanical processing equipment imported from the Americans and his own sand foundry experience to manufacture parts. Every day, except Tieniu, he went in three times a day to deliver meals. Xing Jun, Fang

Dacheng, Wang Xiao, Li Tiegang, Qian Chengshan and others saw that Yang Wei seemed to have changed. They were inevitably curious and asked Tieniu: "Brother has been in a daze recently. What are you doing hiding in the small warehouse?"

But Tieniu could only shrug helplessly and said: "I don't know either, he just faced a bunch of iron lumps and didn't even look at me."

Yang Wei stayed behind closed doors, and few people did not dare to disturb him. They could only follow Yang Wei's instructions to "train" the security team all day long. If Feng Box, a rare guest, had not come to visit rarely, I am afraid he would have stayed in the warehouse for how long.

Von Box was in a hurry when he came to the door. When he saw Yang Wei, he said proudly: "Mr. Yang, the five 75 mm 42 caliber Krupp artillery pieces you ordered are already on their way across the ocean.

.”

It turned out that Feng Box came here proudly to take credit, but Yang Wei was not at all excited. He wiped the sweat from his forehead and said, "You came just in time. I just have something I want to discuss with you." Tempering Blood Mountains and Rivers 48

Fon Box frowned and said, "What's the matter with Mr. Yang?"

Yang Wei took off his coat full of engine oil and threw it to Xing Jun aside. He waved to Feng Box and said, "Good business, come over here and chat."

The security team who were practicing outside were curious to see Yang Wei. What was even more curious was that Yang Wei was actually with a foreigner. But if they knew what Yang Wei was going to do next, they would be so surprised that they couldn't stand together.

Mouth, anyway, Feng Box was really surprised. He looked at Yang Wei with dumbfounded eyes and said: "tractor?"

Yang Wei took a sip of coffee and said disapprovingly: "That's right, and it's a Pioneer tractor made by Chada Engine Company in Chicago, USA."

Not to mention Feng Box, who only had a one-time relationship with Yang Wei, even Xing Jun, Fang Dacheng, Wang Xiao, Li Tiegang, Qian Chengshan and Tieniu, who had been following Yang Wei all day long, heard this.

Just like a monk who is two feet tall, he cannot figure out what Yang Wei is planning. Why did he need a Krupp artillery a few days ago and a pioneer tractor two days later? This is the difference between fighting and farming.

It's too far.

After all, von Box was young and curious, so he couldn't help but ask Yang Wei: "Mr. Yang, can you tell me what exactly you need the Krupp artillery and tractors for?"

Directly saying that he planned to make a tank would inevitably scare them. Yang Wei smiled proudly and mysteriously and said: "In short, what I want to make is a magical and great thing. You will know when you see it. In short, Baga

I entrust you with the tractor number '."

Ordering a tractor was not a difficult task for von Box, especially after hearing Yang Wei's intriguing answer. Driven by curiosity, von Box agreed wholeheartedly, but he wanted to see Yang Wei.

What exactly are you doing? If there is anyone in this world who can combine agricultural production with mechanical weapons, he would be considered a genius.

But Feng Box did not expect that Yang Wei was indeed such a rare genius in this era.

In fact, ordering a tractor is just a pretense. What Yang Wei really wants is not the pioneer tractor, but the gasoline engine of the pioneer tractor. The Type IV H tank made by the Germans uses a Maybach engine and can reach a speed of four times an hour.

Ten kilometers, and the performance of the star-shaped V8 gasoline engine used by the Pioneer tractor is much higher than that of the Maybach engine. The speed can be increased to fifty-five kilometers per hour, giving it an absolute advantage in speed.

While waiting for von Box to deliver the pioneer tractor and Krupp artillery, Yang Wei focused on researching improvements to the transmission device in order to adapt to various terrains and the coordination between various parts of the device.

Because Yang Wei increased the thickness of the front armor of the No. 4 tank to 50 millimeters, and at the same time added 30 millimeters of steel plates to the sloped armor part, the track wear was serious. Although the structure of the 380 mm wide metal pin track was simple,

However, direct dry friction between the pin and the pin hole, coupled with the increase in overall weight, resulted in rapid wear and short service life of the track. Yang Wei had to increase the width of the track from 380 mm to 400 mm to maintain the usability of the track.

able.

On the other hand, if Yang Wei is going to use the Krupp artillery, he must consider the modification of the muzzle brake. He needs to increase the muzzle brake at the muzzle, which can reduce the impact of the aftereffect gas energy of the gunpowder on the recoil part of the gun.

impulse, because the reaction force of the Krupp gun is quite large, and installing a muzzle brake can absorb about 40% of the recoil energy, reduce the burden on the gun mount, and at the same time improve the maneuverability of the gun.

At the same time, Yang Wei is also preparing to install a fully protected machine gun turret. The processing method can be a cast turret or a welded turret. However, the cast turret is a large casting, and a wooden model needs to be made first. The wooden model is then used to cast sand to make the casting model.

The molten steel is poured into the cooling molding, and process defects such as blisters and shrinkage holes must not appear during pouring. Otherwise, the quality of the turret will be seriously affected. However, it is difficult to meet the standard with advanced domestic factory processing levels, and only hemispherical steel turrets cannot be cast.

Composite armor. In the end, Yang Wei could only choose a welded turret with high technical requirements and high cost.

Now that Yang Wei has financial and material support, the conditions for making the Type IV H tank are far superior to the conditions for making the Tiger tank back then, which is enough for him to make great efforts, but the difficulty of transformation is far greater.

More than imitation, when improving each component, you need to consider the coordination between the improved component and the original component.

As a craftsman who pursues perfection, Yang Wei will not tolerate flaws in any part since he has decided to transform. This is also affected by his usual style of doing things, so countless attempts are inevitable. Armor, tracks,

Every part of the turret has to go through Yang Wei's repeated experiments.

The more you pay, the rewards you get are proportional to it. When the modification was completed, Yang Wei's joy was beyond words. He immediately conducted a test run at the factory in Suzhou, and Yang Wei personally selected a few people from the security team for training.

Just to avoid excessive publicity, Yang Wei did not install an artillery gun on the modified Type IV H tank, but temporarily installed a machine gun instead of the artillery for driving training.

Facts have proved that Yang Wei's caution is unreasonable. Although they are far away in Jiangsu, Huang Huangrong's people are always closely observing Yang Wei's every move. After learning that Yang Wei built such a tractor with a machine gun mounted on it, Huang Jinrong

Rong smiled contemptuously and said: "You built a fucking armored vehicle? He's just a little brat, no matter what. Since a machine gun is enough for him, let him do it slowly.

Can you bring chaos to the world with just such a gun?" Tempering Blood Mountains and Rivers 48
Chapter completed!