Bright Sword: Starting from the Improved Grenade

"The Chief's blueprints are out!"

In the blast furnace area, Zhao Tianyang was discussing with Chang San the steel needed for light and heavy machine guns when Yu Xiaping ran over with a blueprint in his hand, looking excited.

"Let me see!"

Zhao Tianyang took the drawing and took a look at it.

I found that this was a typical two-stroke, single-cylinder gasoline generator with a simple structure and easy manufacturing, so I asked.

“Have you ever thought about what material it’s made of?”

"Have."

Yu Xiaping nodded and replied: "According to my calculations, the crankshaft must be made of high-strength alloy steel so that it can withstand complex stress and rotational force."

"The connecting rod can be made of cheaper medium-carbon steel, as long as it has a certain strength and toughness."

"The piston is made of aluminum alloy, which reduces weight while providing a certain degree of hardness."

"The valve must be made of heat-resistant alloy steel. Otherwise, the frequent opening and closing impact and high temperature will not be able to withstand ordinary alloy steel."

“As for the valve springs, use spring steel.”

“The remaining bearings, bushings and other parts will have to be made of copper alloy, otherwise the friction will be too great and may affect the performance of the generator.”

"What about the seal?"

Zhao Tianyang smiled and asked: "Not only the seal, but also the spark plug, as well as the cylinder block, cylinder head, and crankcase!"

“The cylinder block, cylinder head, and crankcase can be cast directly using the casting method, and cast iron is the material of choice.”

At this point, Yu Xiaping hesitated for a moment and said, "Asbestos pads for sealing are easy to deal with."

"It's sealant and spark plugs for ignition. I don't know how to make them, so I may have to go buy them."

"Well, that's easy."

Zhao Tianyang nodded and arranged: "For the crankshaft and valves, use chromium-molybdenum steel (steel containing a certain amount of chromium and molybdenum)."

"The aluminum alloy used for pistons is aluminum-silicon alloy, and the bearings and bushings are made of copper-lead alloy."

After saying that, he patted Yu Xiaping on the shoulder and said, "The task of manufacturing the engine components is now left to you."

"Leave the sealant for sealing and the spark plugs for ignition to me."

"no problem!"

Yu Xiaping nodded confidently.

All the materials needed for the engine have been told to him, and the next step is to use casting and lost wax method to manufacture the parts. Isn't this a simple task for him?

After discussing the division of labor, Yu Xiaping went to the nearby engine factory to prepare for the preliminary work.

Zhao Tianyang found Liu Ransheng and asked him to go out and buy some rubber and talcum powder.

"Ah! Rubber?"

Liu Ransheng widened his eyes, as if he was imagining that the Nine-headed Insect had ordered Benboerba and Baboerben to kill Tang Monk.

"Chief, rubber is an important industrial raw material. Now most of the rubber in Shanxi has been confiscated by the Japanese."

"The rest are in the hands of the Kuomintang guys, but they won't sell such an important thing to us."

"Even if I want to sell it, it will cost a lot of money. It's not worth it!"

"Don't worry about it. Just go to town and buy some talcum powder, then tell the deputy director of the political department that we need rubber to make engines."

Zhao Tianyang believed that as long as the bosses knew, the arsenal was trying to produce engines.

Let alone rubber, even if they were asked to go to Taiyuan right away, I'm afraid they would have to grit their teeth and give it a try.

"Row."

Liu Ransheng nodded and agreed, as long as he was not asked to deal with rubber.

After Liu Ransheng left, Zhao Tianyang found two workers, dug an earthen stove, and then put oil, asphalt, rosin and coke into the stove.

"ignition."

Zhao Tianyang ordered.

A match was thrown into the pit, and a small flame immediately jumped up.

Then a large iron pot was placed on the earthen stove, and a full cup of water was added to the pot.

Looking at the black smoke that had begun to come out of the earthen stove, Zhao Tianyang gave instructions to the two workers.

"You guys just watch here. Tell me when the oil and asphalt are burnt out. And be careful not to burn out the water in the pot."

"Yes."

The two workers nodded.

Zhao Tianyang then returned to the tent, drew a few blueprints, and handed them over to the newly built ceramic factory and iron smelting plant.

Let them build something based on the drawings they designed.

In the evening, after dinner, Zhao Tianyang came to the earthen stove.

Seeing that there were not many flames left in the earthen stove, Zhao Tianyang asked the workers to pour out the water in the iron pot and then turn the pot upside down.

It can be seen that after almost a day of burning, the bottom of the iron pot is covered with a layer of black substance.

These things are the fillers needed for sealants, called carbon black.

Scrape off the carbon black on the bottom of the pot and put it into a bag.

Zhao Tianyang weighed it in his hand and felt it was enough, so he asked the two men to return the iron pot to the kitchen, and he went back to the tent to rest.

The next afternoon, because the rubber had not been brought back yet, Zhao Tianyang decided to make the spark plugs first.

Spark plugs look difficult, but they are simple to make.

He first took the nickel steel that the ironworks had asked them to make a day earlier.

(An alloy consisting of nickel and steel.)

The nickel steel was then taken to the arsenal, where the seventh-level workers made the high-nickel steel into the shapes of the center electrode and side electrodes required for the spark plugs.

Then I went to the ceramic factory to see if the insulators needed for the spark plugs had been burned.

After learning that it would take another day to fire the ceramics, Zhao Tianyang had to put the matter aside and go tinker with the materials needed for the light and heavy machines.

The next day, after retrieving materials from the arsenal and ceramic factory, Zhao Tianyang began the assembly work.

First, the ceramic insulators brought back from the ceramic factory are carefully repaired.

After ensuring that there are no burrs, the center electrode is installed into the hole in the middle of the ceramic insulator.

(Ceramic insulators are made by mixing clay, quartz, feldspar, and bauxite in a certain proportion with water and firing at high temperature.

Then add the resistor body, made of glass and metal powder.

These resistors can not only fill the gap, but also make the ceramic insulator and the center electrode fit more closely.

It can also reduce radio waves, interfere with other electrical circuits, and reduce the current when the spark plug discharges, thereby reducing the discharge and current erosion of the spark plug electrode.

Finally, the metal screw is inserted into the ceramic insulator. Its function is to send current to the center electrode.

The assembled ceramic insulator is then placed in a coking oven and baked at high temperature.

When the metal screw shows signs of melting, take it out and use a punching machine to carefully punch the metal screw to make the metal screw, resistor body and center electrode more tightly combined.

At this time, apply soybean oil to the outer shell that has been welded to the upper electrode, and then put the insulating resistor into the outer shell with the hexagonal nut.

Next, Zhao Tianyang connected the spark plug, which had basically taken shape, to electricity to heat up the outer shell.

After the shell becomes soft, use a tool similar to a walnut clamp to clamp the shell and the insulator together to achieve the purpose of sealing.

At this point, the spark plug is almost done.

Finally, using pliers, bend the side electrode to create a differential gap between the side electrode and the center electrode.

This gap is usually between 0.6 and one millimeter.

"The next step is to test whether the spark plug can be used!"

Looking at the formed white spark plug in his hand, Zhao Tianyang smiled.

Soon a wire was wrapped around a metal screw in a rotating manner.

"Send electricity!"

Zhao Tianyang shouted to the workers beside him.

The instantaneous current passes through the metal screw and is transmitted to the center electrode.

The powerful voltage breaks through the air and the side electrodes come into contact, producing a dazzling spark.

"Success!"

Zhao Tianyang waved excitedly.

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