Da Vinci made a copycat version of the Watt steam engine, the body part is fine, the functions are similar, but the boiler is a bit large, and the efficiency is not high. This is also Marlin's pot, because Marin had only seen the model of the Watt steam engine in his previous life, but he had not seen what the boiler looked like.

In this way, under the command of Marin, a half-man, Leonardo da Vinci, even if he was extremely smart, did not have the brains to improve the boiler. Moreover, he was too busy teaching to improve the boiler.

However, although the boiler is crude benzene and the efficiency is low, the effect is basically achieved. It may not be possible to use it on a train ship, but it can be used in industry, but it is sufficient.

At present, the Da Vinci version of the Watt steam engine also has a speed of 50 revolutions per minute. This speed may be far less than that of the small table fan in later generations, but it can barely be used for industrial production. At least, it's faster than manual and long-lasting enough.

The only problem is that the stability is relatively poor, and it is always shut down and needs to be repaired. Obviously, this is the reason for the imperfect design, but also the reason for the backward processing technology.

Therefore, the current Da Vinci version of the Watt steam engine, each machine must be equipped with 10 craftsmen, specially watching the machine, ready to repair at any time.

This is a bit like the driver in China after the founding of the People's Republic of China, why was the driver a senior profession in China before the nineties? Because people must not only be able to drive, but also be able to repair cars. At that time, the quality of domestic cars was very poor, and it was common for them to break down halfway. If you don't know how to fix your car, it's easy to get left behind. Therefore, the drivers at that time were all masters of car maintenance, and they all solved problems by themselves. Fortunately, there were very few cars at that time, and it was not easy to crash if the car broke down halfway. Otherwise, if you break down at high speed, it will be easy to die...... Of course, there were no highways at that time, only rough roads.

A master who can drive and repair cars, in that era, was naturally a senior talent, but also a high-paid talent, and it was a very popular profession for that grandmother.

The same is true of the steam engine that Marlin has just built, and it is not uncommon for a few hours to have a problem. So, he gave each steam engine 10 craftsmen, and when there was a problem, he took a wrench and went to the ......

Speaking of which, a full set of tools such as wrenches, vices, and screwdrivers were all given to the copycat by the copycat king Marin. Now, every craftsman in the Beihai Kingdom basically has a toolbox, which can be used to repair various machines at any time.

However, there were not many varieties of machines in those days, only a copycat version of the Watt steam engine, which was very coarse. Therefore, there are not too many wrenches and screwdrivers of various sizes in the toolbox of Beihaiguo engineers. Because, there is only one kind of steam engine, and it is enough for everyone to prepare one type of tool.

Although this kind of machine is often lying on its stomach, with the machine here, Marlin can do a lot of things. For example, Marin's obsessed drill barrel and drill gun barrel!

As long as you set up the guide rails and find a good quality drill bit, you can start drilling the barrel. Although the speed of the steam engine is so slow, it cannot be compared with the impact drill of later generations. However, with patience, it is not a problem to drill a few barrels a day.

As for the barrel, Marin was somewhat unsure. Because, drilling the barrel requires a very thick drill bit, which is difficult to do. The caliber of the barrel is small, and the drill bit is easy to get, but it really can't be done, just go to Africa and get some diamonds to use as drill bits. And the barrel ...... Where did you get such a big diamond......

However, it is not impossible, Marlin can make extra-large drill bits from wear-resistant high-manganese steel. Then, the mild steel column is drilled into the pipe. It's just that the high-manganese steel will become soft when preheated. Therefore, it is necessary to stop and cool down after using it for a while, so as not to be unusable after softening at high temperatures. As a result, the barrel drilling speed can be slow. However, the quality of the artillery processed in this way is absolutely inferior.

Marin remembers that during the Franco-Prussian War, the Krupp artillery was a steel column repeatedly forged with a hydraulic press with great pressure, which made the internal structure of the steel column very tight. Then, the drilling was carried out again, and finally the Krupp steel cannon of good quality was obtained, which beat the French army and could not take care of themselves.

It's just that it doesn't seem to be needed at the moment. It is enough to use the iron mold casting method to get some bronze cannons, and it is a waste to make such a good forged cannon. Because, now, there are no high-powered shells with high bore pressure like in later generations. With the current needs of black powder and iron ball shells, the casting cannon is sufficient.

It is the barrel, you can consider drilling a batch. After all, the forged and rolled barrel is really of average quality. In order to ensure safety, the walls of the forged and rolled barrel often need to be made very thick. In this way, the weight is greatly increased invisibly. The soldiers carried heavy rifles on their backs, which was also quite physically exhausting. If you change to a barrel drilled with forged steel rods, you don't need to get such a heavy barrel, and you can save a lot of weight.

For example, the Mushkert musket weighs about 10 kilograms, which is 20 catties! And the 076-inch imitation brown bass rifle that Marin made weighs more than 5 kilograms, that is, more than a dozen catties.

The modern rifles with drilled barrels of later generations, such as those made in Hanyang, have a total weight of only 316 kilograms because of the use of drilled barrels, which is about two kilograms lighter than the imitation brown bass currently used in Beihai Kingdom.

Of course, the caliber of Hanyang-made is also much smaller. After all, it was with smokeless gunpowder. However, if a drilled barrel is used, it will certainly be possible to reduce the weight of the gun by more than one kilogram.

Moreover, Marlin was now able to make single-base smokeless gunpowder B gunpowder. Although the production is not large, it can also be used with several small-caliber barrels. For example, it can be used to make Mini rifles......

In the era of black powder, the biggest trouble with rifled guns was that there were too many gunpowder residues, which were difficult to clean. If it's a smoothbore gun, it doesn't matter. After firing a pound of lead bullets, you can just poke them with a strip, or even wash them with water. In rifled guns, a lot of gunpowder residue is stuck directly into the rifling, which is difficult to clean. Moreover, there is the danger of hanging lead.

Marin remembered that during the Civil War in the United States, the rifled guns of the American army, after firing an average of 100 rounds, had to be cleaned up intensively. Otherwise, the rifling will be blocked, which will easily cause explosion. Even with the black powder with the least impurities in the mid-19th century, the barrel had to be cleaned after every 250 rounds. Otherwise, if you blow up the chamber, you may be blown up...... And the level of medicine during the Civil War...... Hehe, if you get shot in the leg, you will see your leg, and if you get shot in your arm, you will see your arm off...... Moreover, it is the barber who does it......

The early Maxim machine gun also had problems in this regard, so it has not been able to be promoted. The Maxim machine gun could fire an average of 600 rounds per minute, but in the era of black powder, the barrel had to be cleaned every 250 rounds. In other words, the Maxim machine gun can only shoot for 25 seconds, and then it needs to stop firing and carry out a major cleaning of the barrel...... Isn't that?

Therefore, although Maxim designed the machine gun in 1883, it was not until smokeless gunpowder became widespread that it was truly effective.

What the? You say the Gatling gun came out during the Civil War? Come on, it's a multi-barreled machine gun, and a machine gun has seven or eight barrels, and the rate of fire is only 200 rounds per minute at the beginning. Even after firing for 1 minute, the average of twenty or thirty rounds per barrel was fired, and there was no time to clean the barrel.

Therefore, machine guns with a high rate of fire did not have practical value until smokeless gunpowder was popularized. However, smokeless gunpowder has a much higher chamber pressure than black powder, so a stronger forged barrel is required.

Therefore, Marin planned to use the steam engine, which was not yet stable, to drill a batch of forged barrels for him to use for the marksman troops who used smokeless gunpowder. As for the ordinary musketeers, let's start with the ordinary, heavy barrels that are forged and rolled. Anyway, the black powder chamber was depressed, and the forged and rolled barrel was enough......