Bright Sword: Starting from the Improved Grenade

The next day, at the same time as yesterday, Zhao Tianyang stood in front of the blackboard and looked at everyone.

"How about it, has everyone thought it through?"

"Director, please take a look at the engine drawings we mapped yesterday!"

Cheng Mingsheng took out a blueprint and said, "This is what Comrade Yu Xiaping and I did after we disassembled the engine of the captured Type 97 light bomber and carefully measured it!"

"According to this blueprint, as long as we have qualified steel, we can manufacture this engine. If we don't have steel, it doesn't matter. We can buy some parts and repair the other three engines."

"The Japanese engine has a horsepower of 950. Four engines working together can definitely propel the airship you designed yesterday!"

After taking the blueprint and looking at it, Zhao Tianyang was very happy. If what Cheng Mingsheng and the others said could really succeed, then his big airship might really be able to take off.

"This is the airship I redesigned yesterday based on your data."

At this time, Mr. Liu also took out a blueprint and handed it to Zhao Tianyang: "But with Cheng Mingsheng and Yu Xiaping's engine mapping drawings, I don't think my blueprint will be of much use."

Compared with the airship designed by Zhao Tianyang, the airship designed by Mr. Liu is a medium-sized rigid airship with a length of only 163.37 meters, a maximum diameter of only 18.59 meters, and a load capacity reduced to 20 tons.

However, the advantage of this airship is that it only needs an engine of more than 200 horsepower to propel it.

"If we didn't have the engine drawings mapped by Cheng Mingsheng and his team, I think Mr. Liu's airship would be very suitable for us!"

Zhao Tianyang still put the drawings away and comforted her.

"Okay, now that the engine problem has been solved, I have decided to produce the airship I designed yesterday. Do you have any objections?"

"no!"

Everyone shook their heads. They could still tell the better load capacity between 20 tons and 363 tons.

"Mr. Liu, please send a telegram to Yan'an, asking them to buy 100 tons of aluminum and 50 tons of rubber from the Soviet Union."

Zhao Tianyang said to Mr. Liu.

"give it to me!"

Mr. Liu nodded and agreed.

Then Zhao Tianyang looked at Cheng Mingsheng and Yu Xiaping and said, "Since the drawings of the Type 97 light bomber engine were drawn by you two, then you should work harder and be responsible for repairing those engines. You can tell me if you need any materials."

Cheng Mingsheng and Yu Xiaping looked at each other and replied, "No problem."

Finally, Zhao Tianyang looked at everyone and said, "We already have solutions for the airship's engine, rubber, and aluminum alloy. Now we need to solve the problem of the propeller and the airship's communication system!"

"The propeller can be made using the lost wax process."

Shen Hong raised his hand and said.

"Okay, the rest is communication!"

Zhao Tianyang nodded and said.

"For communication, you can use a compass, map, and radio station together!"

Mr. Liu suggested.

Liu Zaisheng raised his hand and said, "Compasses and maps are simple, but we don't have many radio stations in the entire Eighth Route Army!"

"Leave the radio station to me!"

After saying that, Zhao Tianyang looked at Cheng Mingsheng again: "I can handle the radio station, but the small power generation equipment depends on you!"

"That's easy. Last time I said I wanted to make a generator. I've already collected several hundred kilograms of copper wire and magnets. Then I can easily modify a small hand-cranked generator."

Cheng Mingsheng replied confidently.

Speaking of generators, Zhao Tianyang glanced at Shen Hong, wondering whether the drawings of the boiler-carrying machine had been designed yet.

"Okay, that's no problem. Let's all act according to our respective tasks!"

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

A radio station is a wireless terminal device that communicates from one point to multiple points.

Compared with wired communication, this communication method does not require the construction of transmission lines, is not limited by communication distance, and has good mobility.

In the dispatch and command of emergency incidents, its role is irreplaceable by other communication tools.

I believe that all students who have attended junior high school know its principle, so I will not explain it in detail here.

Simply put, it is a transmitter that emits intermittent electromagnetic waves, and the receiver writes telegraph codes based on the length of the beep. This is commonly known as the telegraph.

To make a radio station, you only need a resistor, a light-emitting diode, a buzzer, and a power supply.

The transmission distance of a radio station is determined by the station power, frequency and antenna height.

First, Zhao Tianyang decided to solve the problem of resistors. Resistors are usually made of materials such as carbon film, cement, and metal film.

They are carbon film resistors. Gaseous hydrocarbons decompose in high temperature and vacuum, and carbon is deposited on the porcelain rod tube to form a layer of crystalline carbon film.

Different resistance values ​​can be obtained by changing the thickness of the carbon film and cutting grooves on it. This method is low-cost, but the performance is average.

Metal carbon resistors are made by heating the alloy in a vacuum, which causes it to evaporate and form a conductive metal film on the surface of the porcelain rod. By engraving grooves and changing the thickness of the metal film, different resistance values ​​can also be obtained. This type of resistor has a high cost but good performance.

Of course, both of the above methods require vacuum and high-temperature heating, which is still too difficult for Zhao Tianyang at the moment.

Currently, there are two most friendly methods for it. The first is carbon resistor, which is made by pressing a mixture of carbon black, resin, clay, etc. and then subjecting it to heat treatment. This method has low cost and is simple to manufacture, but the performance is too poor.

The second one, and the one he is most optimistic about, is made of constantan or nickel-chromium alloy resistance wire wrapped around a ceramic frame. The characteristics of this type of resistor are not only stable performance, strong heat resistance, and small error range, but also very suitable for high-power radio stations.

"I've decided on this one, the nickel-chromium alloy resistor."

Zhao Tianyang wrote five big words "Nickel-chromium alloy resistor" on a piece of white paper. There was another reason why he chose it, and that was its other name "stainless steel".

As long as he can develop the nickel-chromium alloy resistor, he will naturally be able to unlock the stainless steel technology. In the future, he will no longer need to conduct additional research on alloy steel when building airplanes and tanks.

"But stainless steel is not that easy to make! The steelmaking furnace alone is enough to give him a headache."

Thinking of this, Zhao Tianyang put down his pen and found Liu Zaisheng.

"How was it? How much did you buy?"

"I only bought two tons of pyrite, three tons of iron ore, and four tons of coal, and spent two hundred and thirty dollars. If I want to buy more, I will have to wait for a while."

Liu Ransheng took out the notebook he carried with him, looked at it and said.

Ever since he came, he has been working part-time as the logistics manager of the arsenal. Zhao Tianyang likes to ask him directly about matters related to supplies.

"It's ok to use it first and buy more later."

Zhao Tianyang nodded and instructed: "Take the silver and go find the deputy director of the Political Department and ask him to use his connections to buy some nickel back."

"Row."

Liu Ransheng asked: "How much do you want to buy?"

"The more the better, at least no less than 200 kilograms!"

"No problem, I'll go right away!"