When the emperor was almost ready, he sent someone to Aurich to inform Marin, get ready, and take two Mongolian doctors to Switzerland for "rescue". So, Marin began to make preparations...
And Marin was selecting his men and horses, and when he was about to set off, Da Vinci, who had been studying the revolver in Denburg, suddenly came to Aurich...
"Oh, it's Ada! Long time no see, how are you doing recently? By the way, do you still have that fat girl?"
Da Vinci rolled his eyes, and Marin really didn't know which pot to open and which pot to lift. As for the fat girl, she was sent away by Da Vinci long ago. After all, it was just a whore.
"Lord Baron, the reason I came back this time is because I have completed the task you gave me..."
"Mission? What mission?" Marin didn't respond for a while. But soon, he was full of surprises:
"You mean, your revolver has been successfully developed?"
"Hmm - of course..." Da Vinci looked proud. But soon, Marin's blow came:
"Why so slow? It's been a year..."
"You kid, do you think it's so easy to develop a machine? It will take a few months just to test it. During the period, I also blew up a lot of barrels. It took a long time to test the barrel selection alone..." Da Vinci angrily said, No more honorifics.
"The barrel is so difficult to develop? Wouldn't it be safer to make it thicker?" Marin was a little confused.
"Isn't it the trouble you are looking for? You said that this is a gun equipped by the cavalry. Naturally, the lighter the better. So, I had to try to control the thickness of the barrel. What a trouble. You asked for a barrel length of 50 centimeters, and the weight of the gun is not enough. More than 3 kilograms... If it weren't for your harsh conditions, the musket could be developed in a few months... "
"I forgot to mention these conditions..." Marin was also a little embarrassed. At the beginning, these conditions were all proposed by Marin in order to form the "Black Shirt Knight". Cavalry guns, of course, pursue lightness. Because the "Knight in Black Shirt" has to carry several of these guns. If one is that heavy, the war horse will not be able to bear it.
In addition, Marin also let Da Vinci use more powerful granulated black gunpowder. Therefore, if the barrel is thinner, it is easy to blow the chamber.
Fortunately, Da Vinci was more cautious. When testing the barrel, he sent prisoners in the prison to test it, and did not personally go into battle. But this also led to seven or eight criminals being maimed during the barrel test phase...
However, in the early days Da Vinci and his craftsmen used barrels made of pig iron, which frequently exploded. Later, Marin remembered that he had a team that provided wrought iron ingots to Old John's cannon-making workshop. Therefore, Marin arranged for the team that reprocessed the pig iron ingots imported from the UK into mature iron ingots, and provided Da Vinci with wrought iron, which solved the problem that the barrel was easy to explode.
As for the issue of making stainless steel springs, it has always been a top priority. Although Marin sent Kohler to Venice to find a supplier of pyrolusite from Hungary, he has not actually purchased it. Even if the pyrolusite is shipped, Marin cannot immediately produce 65Mn spring steel. That stuff can't be done overnight. Even if Marin knew the composition of this spring steel, he couldn't figure it out all at once. After all, he is not a steel engineer, and he doesn't know the process of making spring steel. It is said that the quenching of spring steel is also very particular. It is also divided into water quenching and oil quenching. Quenching now requires the use of quenching chemicals to strengthen the metal.
Marin definitely doesn't have quenching medicine, and he doesn't understand the principle, so he can only choose between water quenching and oil quenching, or find a balance. This point requires craftsmen to try slowly, and God knows when it will be done. It will take a long time to control the manganese content of spring steel.
Therefore, at this stage, Marin can only choose Da Vinci's plan-let several clockwork masters invited and tied from Italy to hand-craft stainless steel clockwork. The material of all clockwork springs is made by the masters through repeated forging with pig iron bars, and the scrap rate is still very high...
In the end, the finished sample gun that Da Vinci brought to Marin cost as much as 5 gold coins...
"5 gold coins?" Marin exclaimed in surprise. A gold coin is worth 60 pfennigs, and 5 gold coins is 300 pfennigs, which is equivalent to 150 days' wages of ordinary people!
"This is the cost that we have studied for several months before we tried our best to control it..." Da Vinci also felt depressed. The cost of making a small stainless steel clockwork is too high.
In fact, the reason why the cost of fine steel springs is so high is because the people who build them are all master craftsmen, and it is difficult for ordinary craftsmen to make qualified fine steel springs. This life requires a level...
But how high are the labor costs of the masters? They spent a lot of time repeatedly forging the clockwork there, can the cost be kept down? Therefore, the cost of a revolver is as high as 5 gold coins, and the selling price is estimated to reach 10 gold coins...
Marin was a little dizzy. In his imagination, each of the black shirt knights would carry five such revolvers. The cost of a piece of 5 gold coins, isn't it that each person carries 25 gold coins of equipment? This is still cost price. Converted into the selling price, the muskets brought by each person are worth 50 gold coins—very extravagant!
As for the performance of the gun, thanks to the efforts of Ada and several master craftsmen, it is very good. After all, the original version of the revolver is a steel head rubbing against the steel plate of the mainspring. If the steel head is rusted, it may not fire. But Marin asked Da Vinci to directly use the front part of the steel base to hold the flint, and the spring steel piece rubs the flint. The supply of Mars is very stable, and the natural performance is good.
Moreover, Da Vinci also installed a copper shield on the medicine pool outside the fire transmission hole, which can effectively prevent rain. This medicine pool is very similar to that of the flintlock gun. It is also pressed by an iron plate first to prevent the medicine powder from being lost during the bumps. But when the mainspring of the big musket starts to rotate, there will be gears to push the iron piece apart, exposing the gunpowder in the medicine pool, waiting for the sparks generated by the steel piece and flint to splash in, thus igniting the medicine pool, and passing through the fire transmission hole, Ignite the charge inside the barrel...
Because of the copper cover, as long as the charge is not damp, the gun can shoot freely even if it rains...
After all, Da Vinci is a rigorous scientist. When the gun was delivered to Marin, the gun had been tested for several months, and there were almost no dangerous situations such as bombing.
Moreover, because it uses granular gunpowder, even if it is a short gun, the effective range of this gun has reached 50 meters, instead of the 20 steps (30 meters) used by the black-shirted knights in history... After all, the original The black-shirted knights in history all used much less powerful powdered gunpowder. However, what Marin used for the black-shirted knights was all granulated gunpowder, and the power was quite different.
Like the early muskets, the effective range was less than 100 yards. But in the war period, because the gunpowder was fully granulated and all of them were finely processed, the effective range reached more than 200 meters.
Of course, this effective range refers to the effective killing distance, not the distance that can be aimed at. Because the bullets of the musket gun, as long as they exceed 100 meters, will fly randomly in the sky and underground. Anyone who is aimed and hit by a musket gun at a distance of 100 meters is all unlucky and unlucky, and the hit should be doomed...
If powdered gunpowder is used instead, Marin tested it, and the effective range is indeed 30 meters (20 steps). Even so, it is enough.
Because, the main targets of the black-shirted knights are those heavily armored knights with limited mobility, or those spearmen who line up in square formations. After all, both of these two types of arms are slow-moving and stand there as targets.
Even if they wanted to chase, the knights in black shirts would go into battle lightly (compared to the knights in plate armor). Those spear infantry were even more unable to catch up.
The black-shirted knights, on the other hand, could face the plate armor knights, and calmly shoot the 30-gram bullets from five loaded revolvers at those bulky plate armor knights. Even, you can run away and shoot back at the same time.
Mongolian cavalry archers may need superb archery skills to play the "Mangudao" tactic. But the knight in black is not so demanding when playing this trick. Because, to shoot back at the plate armor knight, as long as the aim is accurate, there is no need for too much pulling force or anything. At most, it will suffer from the recoil of the musket, but it can also bear it. Unlike the Mongolian cavalry archers, which require hundreds of catties of pulling force to pull the bowstring, the requirements are very high.
When the black-shirted knight first came out, he directly abused the French knight into a dog by relying on his wretched tactics, and he continued to attack when it rained. After the French suffered a big loss, the best countermeasure they thought of was to also hire German black shirt knights to fight against...
Fiddling with the revolver in his hand, Marin could already foresee the future scene of using black shirt knights to torture French plate armor knights. However, thinking of the anger and possible revenge of the French afterwards, Marin shuddered again, feeling extremely conflicted in his heart...