To be honest, if it wasn't Daddy who made this suggestion, Ding Chen would have to laugh at him. Pen %Fun %Pavilion www.biquge.info His current is a typical idea of quick success.

Not to mention that Ding Chen has already dismantled the gear sets of several other threshers to make gearboxes, even if he can modify all these threshers, there is only one power source that can be used. He couldn't build several more waterwheels. There is no ready-made thing to renovate this waterwheel, it needs to be built from scratch.

With the processing capacity of the current apartment, it will take half a month to build a waterwheel, even if the source of materials is not considered, it is impossible to have time.

However, Dad's proposal also made Ding Chen a little moved, if he could, he really wanted to build another waterwheel. With the experience of building and using the first waterwheel, he now has some new ideas. For an engineer, it's a great joy to be able to validate your ideas in a timely manner.

Dad listened to Ding Chen's explanation and was obviously a little disappointed. He thought for a while and then asked Ding Chen: "So can other agricultural machinery be transformed?" ”

Ding Chen hurriedly shook his head, the waterwheel is inseparable from water, the thresher can be moved to the river to start, and the agricultural machinery such as rice transplanters and harvesters cannot also be driven by waterwheels.

Dad was silent for a while, and smiled bitterly at Ding Chen: "It's because I'm too anxious, it's already very rare for you to be able to make this threshing machine." ”

Ding Chen smiled and said to his father: "In fact, it is not very difficult to transform other machines, the most important thing is to have a power source." It is not possible to crack crude oil, but if the power supply can be restored, it is still possible to restore the working capacity of these machines. ”

When he joined the orbital commando, domestic battery technology was already very mature, especially fast charging technology, and many small combat vehicles had begun to be replaced with battery drives. The range of use in civil use is wider, and although the instantaneous output power is not as good as that of traditional fuel, it is better than low cost. Ding Chen's idea was to find this kind of battery and then modify it to agricultural machinery.

If it really doesn't work, he can also try to let the farm machine drag a cable, but the premise of both solutions must be electricity first.

Of course, Dad didn't expect that Ding Chen had already thought of two plans in a blink of an eye, and he looked at Ding Chen in surprise, "You have a way to restore power." ”

Ding Chen suddenly smiled bitterly, thinking that this is treating himself as a god? He shook his head and said, "I just have this idea, and if I want to implement it, I need specific ideas." ”

"What do you want to do?" Dad said, "As long as you can think of it, I will give it my full support." ”

Ding Chen suddenly had the feeling of NASA in the past, but unfortunately his father is not the US Congress, so he is really not a big benefactor. He hesitated and said, "I'm afraid I have to discuss it with Ye Dai." ”

"Of course." Daddy said. He smiled at Ding Chen, "When you two are together, you can always surprise us." ”

So Ding Chen habitually thought crookedly.

At dinner, he saw Ye Dai again. Ye Dai's expression looked a little tired, but it was obviously not as sick as Ding Chen had guessed.

Seeing Ding Chen coming over, Ye Dai cheered up and waved her hand to him. Ding Chen frowned and asked, "What's wrong with you?" Is there something uncomfortable? ”

He sat down beside Ye Dai, stretched out his hand and touched her forehead, frowned and said, "Is your body temperature a little low?" ”

"That's because I've been in the basement for too long." Ye Dai didn't care about Ding Chen's intimacy, she said tiredly. Then he put his finger in front of Ding Chen, "Can you smell what it is?" ”

Ye Dai had obviously washed her hands, and there was still a faint smell of soap on her hands. Ding Chen sniffed, frowned and said, "What is this?" ”

"Nitrocellulose." Ye Dai said tiredly: "I spent the whole day in the basement sorting out the process of reloading bullets. ”

Only then did Ding Chen understand why Ye Dai didn't get up early in the morning as usual. He originally thought that Ye Dai was tired from staying up late yesterday, but he didn't expect that Ye Dai knew that today's work was dangerous, so he had to rest fully.

The presence of refugees not only disrupted the rhythm of life in the apartments, but also affected caravans and the Old Town. The apartments and the old town, in particular, are aware of the huge risks involved.

This group of refugees is restrained by the host, and they finally cross the border honestly, but if the next time they come are spontaneous refugees, then it will obviously not be so peaceful. Once a conflict occurs, both sides will lose a lot, especially in a place like an apartment with thin staff, and the slightest negligence may completely disappear.

Therefore, it is imperative to reload bullets and strengthen the continuity of firepower.

But a large number of reloaded bullets in this era undoubtedly belong to high technology. Even in places like Su Ying's caravan departure, which still retains some of its industrial capacity, it is still very interesting that the apartment can be reloaded with bullets here, let alone the old city.

But the reloading bullet must first have a cartridge case, not to mention that there is no apartment here, and there are not many places that can solve this problem independently in this era, and they are all overlord-level existences.

Fortunately, Xu Shuidong found a batch of empty bullet shells in the old city, which was the basis for reloading bullets. In fact, these shells were found long before Xu Shuidong was born, but they were useless, so they were not taken seriously until Ye Dai's father appeared.

Ye Dai's father put most of his energy into this work, and finally made great progress, and the revolver made by Xu Shuidong was specially designed to cooperate with reloading bullets. Because these cartridge casings are 5.8 mm caliber, which is rarely found in the guns owned by apartments or in the Old City, there is no way to use these bullets without redesigning the guns.

And then there are also warheads and gunpowder, primers that need to be solved. The old city collected some lead that could be used to smelt warheads, and the apartment side expanded the cultivation of cotton to obtain nitrocellulose. However, **** and chemical reagents need to be purchased completely.

So the apartment has been entrusting two caravans to traffic **** and other chemicals for them.

Before Ye Dai's father died, he finally saved enough materials for the experiment and began to conduct the experiment based on the information he found. These tests were successful for a time, and the results of the trial reload were very good. Until an accident occurred later, Ye Dai's father died, and Xu Shuidong left the apartment and returned to the old city. The matter of reloading the bullet was put on hold indefinitely.

Now that this work has to be started again, it is naturally only up to Ye Dai to operate. She is the only one who has ever had practical experience. To be honest, this is definitely a very stressful job for Ye Dai.

After listening to Ye Dai's explanation, Ding Chen said uneasily: "You should call me." ”

Ye Dai looked at him and asked, "I know you know a lot of things, but have you ever done such a thing?" She looked at Ding Chen seriously, "I mean the preparation of nitrocellulose." Don't lie to me. ”

Ding Chen was obviously a little hesitant, he could guess what Ye Dai meant, but dealing with the most dangerous explosives among dangerous chemicals, there was really no way to be an expert, and if he was not careful, it was not only himself who died.

Seeing his hesitation, Ye Dai shook her head and said, "I have already lost one of my relatives and I don't want to lose another." ”

Ding Chen held her hand worriedly and whispered, "Actually, my learning ability is quite strong. ”

Ye Dai smiled, covered Ding Chen's hand with her other hand, held him and said, "Don't worry, when I succeed, I will teach you." ”