The next day, Su Chengyu loaded the bolt back into the self-generated gun, took the gunpowder and the craftsmen to the test site behind the Ordnance Bureau.

Gunpowder is poured into the medicine pot, set on fire, sickle pulls the hammer and pulls the trigger. Click, the gunpowder was not ignited. Set fire to the sickle and pull the hammer to try again......

It wasn't until the third time that that the powder reluctantly burned.

As Su Chengyu expected, he tried dozens of times in a row, and the successful ignition rate was less than 30%.

The craftsmen looked at each other, yesterday they all thought that this gun could be used, only Su Gongzi said that there was a problem with the bolt. This time it was really a big problem, and several people secretly gestured at Su Chengyu with their eyes, which means - it seems that he really knows how to Qimen Dunjia.

Su Chengyu led the people back to the workshop, re-determined the size of the bolt, and increased the impact angle of the hammer and the fire sickle.

The craftsmen immediately started to remake the firecrackers according to the new size, and they all wondered in their hearts that they would make the firecrackers according to the teachings of Su Gongzi, and if they were lucky, they might even be able to touch the fur of Qimen Dunjia.

In fact, Bi Maokang, the inventor of the self-generated fire, had long discovered the problem of low firing rate, but it was not well solved until his death.

And these problems, in Su Chengyu, a person who has learned the principles of modern machinery, are a matter of adjusting a few parameters.

Knowing that the answer is a matter of a few words, not knowing that it is a mountain.

Due to the big changes and the need to remake the clay fan, Su Chengyu knew that he would have to wait at least another day.

He was thinking about what he could do, when a palace guard came to him, saying that the palace steward had come to report, and the officer named Yu Xin had come to pay his respects, and now he was in Chen Wangfu.

When Su Chengyu returned to the palace, the people who introduced the gift immediately said that Mr. Yu was already waiting in the front hall.

So he turned to the antechamber again, and heard someone shouting in surprise from afar: "Shizi! ”

He looked up and saw a young man of twenty-four or five years old, with broad shoulders and a broad back, a tall stature, and a straight nose and a square mouth, kneeling down on one knee and saluting him, "See the son!" ”

It was Yu Xin.

Su Chengyu stepped forward to help him up, "I haven't seen him for more than two years, right?" Sit down. Then he beckoned him to sit down. His own subordinates brought hot tea.

Yu Xin looked at Su Chengyu, and many memories came to his heart, and he was very emotional for a while, "After leaving Nanyang for many years, this time my department was sent to Zhangpu and stopped repairing through Tianxing Mansion. So I came to see the Son, and when I heard that you were in danger on the way, my heart was greatly shaken. This is to see your dragon horse spirit, but it's no big deal? ”

"It's okay, just a few days of sleep." Su Chengyu said with a smile, "I heard that you have been promoted to general in just two years in the army, and you are doing very well." ”

"Hey, Shizi is smiling." Yu Xin's expression was depressed, "Actually, a few days ago, it was still Mr. Qian. On the way to Zhangpu, some soldiers escaped, and Zheng Zhilong seized the matter and demoted me to the rank of general. ”

"Is that so?" Su Chengyu was puzzled, "Also, Zhangpu is in the southeast of Fujian, what are you sending there for?" ”

"Alas," Yu Xin sighed, "I was originally stationed in Chunhua, and after the fall of Nanjing, I entered Fujian from Zhejiang and joined Longwu Zhengshuo.

"Who would have thought that now Fujing Zheng Zhilong covered the sky with one hand and called me as his personal soldier. I was not convinced, so he was organized into a battalion by him, along with several other teams that were dissatisfied with him, and was transferred to Zhangpu and left in the cold. Along the way, no military pay was allocated, so that our troops continued to desert, and now there are less than sixty soldiers left. ”

"This Zheng Zhilong!" Although Su Chengyu knew that Zheng Zhilong controlled the government, he didn't expect him to be so blatant in excluding dissidents. In June of next year, it was because of the surrender of this goods to the Manchu Qing Dynasty that it directly led to the fall of the Longwu Dynasty.

He restrained the anger in his heart and looked at Yu Xin, "Chuangzhi, then what are you going to do now?" "Chuangzhi is Yu Xin's expression, Su Chengyu inherited Zhu Linmiao's memory, and he knows it.

Yu Xin said dejectedly: "If there is no military salary, I will have to run out sooner or later." You can only take one step at a time. ”

Zheng Zhilong wanted to bring together the troops who refused to submit to him, so that they could be dispersed due to lack of pay. Thinking of this section, Su Chengyu's eyes suddenly lit up, and he said in his heart that Zheng Zhilong had helped, and I didn't have to bother to find it, and all the people who didn't deal with him were here. This battalion may be where they can draw on their strength.

He asked Yu Xindao: "How many people were sent to Zhangpu?" ”

"It is said that there is a battalion, but the actual quota is far from full. Coupled with the recent desertion, there are only more than 800 people left. ”

Su Chengyu thought for a moment and said to Yu Xin: "Chuangzhi, can you find a way to delay in Tianxing Mansion for a few days?" ”

"It's easy." Yu Xin immediately said, "The soldiers are so hungry that they can't walk, at most Zheng Zhilong will detain me for not being dispatched." I wonder what the son of the world is planning? ”

"These experienced troops cannot be ruined." The corners of Su Chengyu's mouth were slightly raised, "Maybe Zheng Zhilong will soon regret letting you out." ”

Yu Xin was stunned for a moment, and was a little surprised by the sly expression of this young man, and said busily: "Everything is at the disposal of the son." ”

A moment later, the diner came to report that dinner was ready.

Su Chengyu listened to Yu Xin talk about the recent battle situation at the dinner table again. The city of Jiangyin was broken, and the city was massacred. The Qing army Zhang Tianlu's army approached Huizhou, and Huizhou was in an emergency. Ji'an fell, and Ganzhou was in an emergency. Civil unrest broke out in Huizhou, Chaozhou, Guangdong, and Tingzhou, Fujian, and local erosion......

It wasn't until Yu Xin left that the time had passed, and Su Chengyu asked him to withdraw eight hundred taels of silver from the palace account, so that he could send it to the soldiers first to stabilize the army's heart.

Su Chengyu recalled the battle situation he had just heard, and there was an emergency everywhere, and the Longwu Dynasty was now leaking everywhere like a broken ship. He knew that he didn't have much time left for himself, and he had to speed it up.

At noon the next day, the self-generated fire gun manufactured according to Su Chengyu's newly designed plan had been completed.

Su Chengyu looked at the firearm in his hand, except for being a little rough, the bolt was very similar to the British 1730 flintlock pistol in later generations, and he had a hunch that it should be reliable this time.

On the test site, his feelings were fulfilled, and the firing rate had reached nearly sixty percent. And that's when the spring didn't quite please him. If you change to a more elastic steel sheet, the firing rate should be improved, but there is no suitable spring steel at the moment.

Don't think that the firing rate of sixty percent is not high, first of all, the arquebus of the same era is often dumb, and secondly, even if the flintlock pistol is dumb, just pull the hammer and fire again, it will not take two seconds. Therefore, the firing rate of sixty percent is enough for actual combat, and there is still room for improvement.

The craftsmen seemed to be unfazed, as if they had expected that the problem of the new gun would be solved. They were already convinced of Su Gongzi's level of craftsmanship.

The shed took only four days, and there were still days left before the agreed ten days. Su Chengyu made some detailed improvements to the bolt and handed it over to the craftsmen for implementation.

He himself drew all the finalized self-generated firearms parts into standard industrial drawings. After drawing, he felt that the charcoal lines could not last, so he asked the carpenter to help him sharpen a few bamboo pens.

The difference is that he made a narrow slit at the tip of the pen and made the first simple "fountain pen" in the Ming Dynasty.

When the craftsmen saw the thin and stable lines of his pen, they muttered again in their hearts, "Qimen Dunjia is powerful."