Then the craftsmen began to carry out the iron bullet launch test.
Fortunately, they remembered that Su Yonglin told them to stay away from the test site and find a good bunker to warn them, otherwise Su Yonglin could not wait until today to collect the bodies of these craftsmen.
Simply put, it’s not an accident. Three tragic failures.
The first batch of five-door iron cannons were completely blown up. If thunder broke the iron, it shattered a wooden lookout and scared everyone.
A piece of iron directly rubbed the head of the firearms department, Qiu Yuan, and flew over, giving Qiu Yuan a fright that his heart was almost jumping out.
After Su Yonglin’s transformation, the explosive strength of gunpowder was greatly improved, and the gunpowder craftsmen kept improving the explosive performance of gunpowder, but the iron cannon could not carry such a strong force and cracked directly.
The first experiment was declared a failure
The craftsmen learned the lesson that they didn’t have enough strength in smelting iron, so they worked hard to master the technology of smelting iron to the extreme. After several shifts around the clock, the second batch of five-door guns was quickly built and then tested.
It’s another accident that five consecutive explosions completely cooled the hearts of craftsmen.
They began to reflect on what was going on, what went wrong, and how to upgrade their casting technology and iron strength. A group of experienced blacksmiths thought hard day and night and even called blacksmiths from other departments to study together.
After full argumentation, they started the third action, cast five iron cannons again and continued their experiments.
It’s still five consecutive bombings, but it’s not so broken than the first bombing.
The craftsmen looked at the broken proving ground and wanted to cry.
They brooded and thought about it.
Suddenly Qiu Yuan, the head of the Firearms Division, remembered that Su Yonglin had told them to try copper if iron didn’t work.
So he suggested that the Firearms Division secondment a group of copper and coppersmith to assist the Firearms Division in casting. Because copper is more expensive, he cast two doors to try the effect.
Don’t say that the copper casting copper cannon successfully launched a spherical iron bullet and successfully hit the mountain in the test site and smashed a pit. It looks good.
The craftsman were so excited that they hugged each other to celebrate and felt that they had finally fulfilled their promise to Su Yonglin.
But this time Qiu Yuan had a problem.
"Copper is precious. This is to cast money and really use it to cast guns. How much copper does it take for the navy to have hundreds or thousands of doors without backing? Do we still have copper to cast money with? "
Craftsmen, look at me. I’ll see if you don’t talk.
Moreover, they really don’t know much about the economic problems. They have determined the feasibility of new gunpowder weapons from the technical level.
However, Qiu Yuan felt that such a report would definitely not be passed, which would inevitably lead to some economic criticism. The Ministry of Finance would certainly not agree, and he still asked craftsmen to try iron.
The craftsmen urged Qiu Yuan to say that the iron was really useless, and it was blown up three times. Then the iron cannon was taken out and killed one of our own before the enemy was killed. What is this?
Qiu Yuan doesn’t know that the head key here is that the copper casting gun is too high, and I’m afraid the financial situation is hard to bear now.
"I know that iron alone can’t work, but copper can’t stand it. The court will definitely not agree to large-scale copper casting guns or iron."
When the two sides disagree, a craftsman has a whim.
"Copper can’t do it alone. Why don’t you try casting the gun body together with copper and iron? What do you think? "
On the spot, everyone looked at the craftsman strangely and looked at him all over.
But I have to say that this is a new idea. Qiu Yuan followed this discussion and felt that the firearms effect and the court finances found a delicate balance point.
So he allowed craftsmen to experiment.
Su Yonglin came to the stall when the Firearms Division decided how to combine copper and iron to try to jointly cast the gun body. They also found a preliminary direction-iron core copper body.
This is due to a physical property that the melting point of copper is much lower than that of iron.
Craftsmen don’t know that this is a physical property, but they have experience and long-term work, so that they can master these experiences, and with these experiences, they can find the right method.
Although their efforts are still in progress at this time, I don’t know when they can really finish such a gun.
When Su Yonglin came to visit, the casting gunner was still in full swing.
Chapter 667 Positions make qualified iron!
Su Yonglin followed Qiu Yuan to the casting gun and saw the craftsmen who were working with high-temperature cast iron.
"Who came up with this method of iron core copper body?"
Su Yonglin asked Qiu Yuan with interest.
"It was a craftsman who told Wang Tie to deal with iron in the first half of his life. At that time, he just said that I just thought that this method might be feasible. After all, copper is used to cast money and things to cast guns. I’m afraid the finances can’t accept it."
"It’s very thoughtful of you. This is really a problem."
Su Yonglin nodded, "Don’t say that we were short of copper and money in the Southern Dynasties, but we may lose money here. I think we have to make some changes, but the changes will take a while."
"Although copper can successfully build artillery, I feel that this is a problem."
Qiu Yuan said, "It’s just that Wang Tietou came up with this idea and tried it a little bit. Can iron and copper be added together to complete the casting of the gun body? If you can, it’s a good idea."
Su Yonglin was silent for a while, wondering if he could help reasoning. Suddenly, like a flash through the skull, he thought of a key point.
"By the way, when you cast guns, remember that the thickness of the gun body cannot be the same."
"Ah?"
Qiu Yuan blinked a little and asked, "What do you mean? I am not very white. "
"Before you cast guns, was the thickness of the barrel the same from the muzzle to the tail?"
"Well … I really haven’t noticed this steel-toed! Steelhead, come here! "
Qiu Yuan shouted at the cast cannon car, and soon a dark-faced blacksmith in his thirties came running.
"What’s the matter … hey! Hey! Caocao Caocao people have seen you! "
Wang Tie-tou saw Su Yonglin around Qiu Yuan at first sight, but Su Yonglin raised his hand and stopped him.
"Okay, okay, don’t bother, don’t pay attention to this."
Su Yonglin walked over and asked, "Steelhead, did you tell me that the thickness of the barrel was the same from the muzzle to the tail when we were casting guns?"
Wang Tietou blinked.
"Yes … right?"
"Well, that’s the problem."
Su Yonglin clapped his hands and said, "You can’t do this. When casting guns, the thickness of the barrel should be gradually thickened from the muzzle to the tail. The thickness of the barrel should be the thickest, but the muzzle can be slightly thinner."
"What is this?"
Qiu Yuan and Wang Tietou watched Su Yonglin together.
Su Yonglin thought about it and decided to explain it to them in easy-to-understand words.
"What do you think? We’re casting guns to shoot iron bullets out of the barrel and make them fly farther. It’s harder than a trebuchet, right?"
"Right"
Two people nod.
"Then how do you think iron bullets and gunpowder barrels can make iron bullets fly out of the barrel?"
"Er … it was the gunpowder barrel that exploded and then the iron bullet was blown out, right?"
Wang Tie made a gesture of "bomb yourself first and then bomb others, otherwise the barrel wouldn’t be blown to pieces. That’s what I think."
This guy also told me the feeling of seven injuries boxing.
But it’s true that this thing is to blow yourself up first and then blow others up. You have to be able to withstand the bombing to ensure that the enemy is killed.
So Su Yonglin smiled.
"Right"
Su Yonglin pointed to Wang Tietou. "Iron bullets and gunpowder are all fortress to the tail of the gun. The tail of the gun is where the gunpowder ignites and explodes. You want to ignite and launch the gunpowder, and then push the iron bullets out of the barrel so that the iron bullets can fly out.
Where did the gunpowder explode? If the tail of the gun is not thick enough, won’t the barrel be directly blown through? Compared with this gun tube, it is not necessary to be so thick. I think that’s the problem. "
Su Yonglin explained that Qiu Yuan and Wang Tietou fell into deep thinking for a while, and they found that it was really such a statement.
They all know the explosive power of gunpowder. If the iron pipe is not thick enough, isn’t it true that the explosive power of gunpowder can’t be carried? Isn’t it going to be blown to pieces?
Wang Tietou really felt suddenly enlightened at this thought.