Bright Sword: Starting from the Improved Grenade

"Yeah, stick the wires directly into the saline solution."

"Be careful not to get hurt by sulfuric acid."

In the blast furnace area, Zhao Tianyang walked between the two groups of workers, instructing them respectively on how to prepare ethylene and chlorine in order to obtain their mixture, polyvinyl chloride.

Polyurethane and polyvinyl chloride can be mixed to make a waterproof coating for canvas.

Thinking of polyurethane, Zhao Tianyang felt a little headache. It seemed that he had to ask Liu Ransheng to go out again.

"Chief, the rubber has been delivered!"

Just then, Li Yun excitedly ran to Zhao Tianyang and said.

"finally come!"

Zhao Tianyang looked excited: "Where is the thing? Take me to see it!"

"It's in Weng'erlang. It was pulled here by a donkey cart. It looks like it should weigh several hundred kilograms."

Li Yuncai replied.

"Great, let's go check it out!"

Zhao Tianyang first instructed the workers to continue preparing ethylene and chlorine according to his method, and then followed Li Yuncai to Weng'erlang.

That's several hundred kilograms of rubber, enough for him to seal dozens or even hundreds of engines.

"Hello, Chief!"

As soon as Zhao Tianyang arrived at Weng'erlang, six soldiers who were resting against the donkey cart quickly stood up and saluted Zhao Tianyang.

"I'm not a leader, just call me Section Chief Zhao!"

Zhao Tianyang smiled and took out six cigarettes and handed them to them: "Thank you for your hard work. It must be difficult to get so much rubber!"

"Foreign cigarettes!"

"Thank you, Chief...Chief Zhao."

The three of them took the cigarettes with surprise, smelled them, and chose to hang them on their ears at the same time.

"Chief Zhao, I'll be honest with you. It was not easy to get these rubbers."

At this time, one of the leading fighters said excitedly: "First, the higher-ups issued an order to look for clues about rubber. So we sent out all the guerrillas, the district squad, the county brigade, and everyone who could move."

"We searched for two days like this, and finally found rubber in a Japanese stronghold. For the sake of the rubber, our brigade commander even made a feint to the east and attacked in the west."

"While launching a massive raid to attract attention, our county brigade, with its elite members, carried the recently manufactured 40mm flat-fire cannon and shot down the enemy's warehouse with one shot."

"Finally, everyone rushed forward with shotguns, elm cannons, and grenades, killing all the Japanese inside, and then mobilized the masses to empty the Japanese warehouse."

"We were able to succeed this time thanks to that 40mm flat-firing cannon. I heard it was invented by the Taihang Arsenal. Could it be you guys?"

One of the warriors, who looked very young, asked Zhao Tianyang curiously.

"Hahaha, how could that be! We are in Huangya Cave, not Taihang Mountains!"

Zhao Tianyang said with a smile.

"That's right! This place is called Huangyadong. Even if it is an arsenal, it should be called Huangyadong Arsenal."

The young soldier looked serious and felt that what Zhao Tianyang said made sense.

"Hahaha......"

As soon as the soldier finished speaking, Zhao Tianyang and others suddenly burst into laughter. The leading soldier patted the young soldier on the shoulder, shook his head, and revealed a helpless smile.

"What are you laughing at?"

The young soldier asked in confusion.

"Nothing!"

The leading soldier looked at Zhao Tianyang and said, "Captain Zhao, since the rubber has been delivered, we will take our leave now!"

"Okay, see you later!"

Zhao Tianyang saluted these people.

............

After getting the rubber, Zhao Tianyang asked Li Yuncai to prepare the materials needed to make the sealant. He returned to the blast furnace area and made the polyvinyl chloride first. Then he came to Li Yuncai and started making the sealant.

Today's sealants are relatively simple to make, requiring only rubber, sulfur, zinc oxide, talcum powder, and some motor oil.

(The zinc ingot is heated to a high temperature to evaporate into zinc vapor, which is then reacted with oxygen to form zinc oxide.)

Zhao Tianyang first cleaned the rubber and cut it into small pieces. Then he heated the rubber to soften it and increase its plasticity. Finally, he used a stirrer to stir the heated rubber to make its molecular structure looser, thereby improving its plasticity.

During the mixing process of rubber, sulfur, zinc oxide and talcum powder should be mixed in a certain proportion, and then the mixture should be slowly added to the rubber that is being continuously stirred.

Of course, in this process, a small amount of engine oil should be added to adjust the viscosity and fluidity of the rubber.

With constant stirring, the mixture in the blender gradually turned into a semi-solid state. Seeing this, Zhao Tianyang hurriedly instructed the workers to put the sealant in the blender into a ceramic can, seal it, and store it in a cool, dry place.

After the sealant and spark plugs were successfully manufactured, Zhao Tianyang counted the parts and found that only the fuselage and propeller were left of the rotorcraft, which had not yet been started.

In response to this, Zhao Tianyang first drew out the data of the propeller, and then asked Li Yuncai to go to the countryside to find some dried walnut wood to make the propeller.

He went to the blast furnace area, found Li Tie, and asked him to smelt some wrought iron so that he could use it to make iron pipes.

"Iron pipe?"

Li Tie thought for a moment and asked, "Chief, how big a pipe do you want?"

"I haven't thought about this yet. You can practice first. I'll give you the data in two days!"

"Row."

After the discussion, Zhao Tianyang returned to the tent, took out a white paper, and began to formally plan the data and shape of the rotor glider.

Originally, he first thought of the DFS230 light assault glider invented by Germany during World War II, but all gliders of this period were unpowered and could only be towed by airplanes.

So he turned his attention to the three-wheeled motorcycle and the delta-wing glider behind him.

A three-wheeled vehicle is similar to a helicopter and has very high requirements for the engine. After the engine stops, the pilot can still land by gliding. However, Zhao Tianyang finally chose a delta-wing glider, if for no other reason than that it is safe and easy to manufacture.

This thing is very safe. Even if the engine stops, the pilot can choose to glide down. It is also not difficult to operate. Anyone who is not afraid of heights can fully control it after two or three trainings.

Two days later, Zhao Tianyang handed the design drawings to Li Tie, and asked him to build the fuselage using wrought iron pipes according to the data.

"It looks easy, I'll give it a try!"

Li Tie looked at the blueprint and felt that it should not be difficult.

"Come on, if you need welding, go find Comrade Shen Hong to borrow some people. His arsenal has trained several welders!"

Zhao Tianyang patted his shoulder encouragingly.