Release that Witch

270. Chapter 270 High Pressure Cylinders

    After the meeting, Roland left Barov alone.

    “You also saw that the current chemical laboratory dignitaries, Greycastle Industrial Company dignitaries, and then I intend to mass produce soap and perfume, which also requires a lot of manpower.”The prince said bluntly, “When most of the townspeople pass the primary education assessment, they will get at least next year, and they will be full of six or seven hundred people, which is not enough. I need more people. ”

    “If you recruit from stronghold…”

    “No,” Roland interrupted. “After the city is built next year, stronghold will be connected to the small town as a whole. This is equivalent to putting the money in the left pocket out of the right pocket. I need more people outside the Western Region.”

    “This…”Barov is a bit embarrassed, “I am afraid that it is not so good to solve. If you go to other cities to fish, the local feudal lord will not sit idly by.”

    “Don’t go to the city,” Roland put his fingers into the cup, took some ice water, and snarled on the table. “I don’t know if you noticed, after the Months of Demon, Greycastle has been in the midst of war. . Including Timothy attacking the southern region several times, causing Eagle City to burn, and the surrounding villages and small town were severely damaged. Then he conquered the northern region and deprived Esse Duke of the title and territory of treason. Finally, this sea attack in the east,” he hit hard on the tabletop, leaving a water stain, “Let the Sea Wind Region, Golden Harvest City, and Raven Fort have been affected, the surrounding small towns Not to mention, the number of people who fled to Kingdom Capital can be seen as a lot of damage. ”

    “what do you mean……”Barov showed a thoughtful expression.

    “Promoting the Western Region,” the prince wiped out the water. “In the past six months, only the Western Region was in peace, there was no forced recruitment, and no war was attacked. In particular, the first point – Timothy’s use of civilians to fight, will certainly recruit and even plunder civilians everywhere, no one can guarantee that this will not fall on his head next time, so a stable place to isolate the war is The main points of our promotion. ”

    “I probably understand,” he mused, “Are you going to attract civilians in other small towns and villages through the promise of not being strong, hard-working, and providing shelter, food and stability?” ”

    “Almost,” Roland nodded with a smile, and his thoughts and ability to accept have always been the advantages of the Assistant Minister. “And it’s also important to publicize the generous treatment that literate people can enjoy. I think there will be some nowhere in these places. Knight and noble are willing to come to the Western Region to try their luck.”

    Whether it is a village or a town, it is almost a small noble territory. If you are in peacetime, even if the land is poor, the operation is not good, and you can fill the stomach with a few acres of farmland. However, if the population loss during the period of the chaos is serious, the days will be difficult to continue. At this time, there is a safe place to go. Most people should be tempted. Anyway, even if they are left unattended, they will not be taken over by others. Waiting for this time, they will take the money and mercenaries back to take over the territory.

    As for how to promote, he believes that the other party has its own way.

    “But Your Highness, this way, the placement of these people is a cost, and the food can not be interrupted,” Barov hesitated. “In case there is any accident in the caravan, the City Hall treasury will soon dry up.” .”

    “hmm…You said there is a reason, “Roland touched the chin, the new political power of the most important task is to establish prestige and confidence in the people’s hearts, if suddenly caught in the plight of pay, the good situation will be a sharp downturn,” So, you go back to the plan, until the caravan and small town Completion of the next one months of transactions, the Treasury after the implementation of the full. ”

    “Follow, Your Highness,” Barov stroked his chest.

    After explaining the task, Roland returned to the office and began thinking about how to complete Margery’s balloon order.

    The price of a thousand gold royals is higher than that of the Steam engine, but its cost is much lower. The air bag is mainly drawn by Soraya, while the hemp rope and bamboo basket are cheap. In fact, Roland has experimented with a simple sample in the arsenal yard: a hot air balloon that can carry both Lightning and Macy.

    After repeated considerations, he eventually abandoned the hot air balloon program. Gas needs to be obtained by retorting coal. The equipment is large and the manufacturing is very troublesome. In addition, coal is imported from other towns. Small-scale production is not cost-effective. Hydrogen is so convenient and easy to get.

    The prototype is made of a single-sided water coating. After the painting, the paper on the back is burned, so that the whole air bag is light and has almost no weight, and the flexibility is also excellent. In the test, the inflated balloon was not afraid of rain, impact, and fire. Macy became a variety of birds and rushed to the mammoth without leaving any traces. Only the iron needle could pierce the millimeter-thick coating. Floor. Due to its extremely light weight, a hot air balloon of about five meters in diameter can carry an adult lift.

    The only difficulty is how to solve the problem of inflation of high pressure hydrogen cylinders.

    DC motors used to electrolyze water to produce hydrogen must never be sold. Once a motor is connected to the Steam engine, all hot air balloons can be inflated, which is obviously not worthwhile. If you want to continue to earn gold royal from the big dog, you must have a high-pressure gas cylinder that can be repeatedly inflated.

    The gas cylinder itself is not difficult, the material can not be thickened, and both pig iron and wrought iron can be used. Anyway, there is Anna, precision machining is not a problem. The key lies in the inflation – the pressure of the gas cylinders of later generations is above 20MPa. It is undoubtedly a fantasy story to hit the pump. The ten Kirin arms are useless, at least the high-pressure air pump is required. If the pressure inside the bottle is not enough, there is no way to fill the hot air balloon.

    The high-pressure air pump is divided into piston gas and turbine gas. The former belongs to the technology tree of internal combustion engines, and the latter belongs to the category of turbines. No matter what kind of research and development, it is a time-consuming and laborious project. Until the evening, Roland finally came up with the simplest solution: self-inflating inside the bottle.

    The inspiration for him was a piece of news that I saw before: the vendors selling hot air balloons on the street used modified liquefied gas tanks to store hydrogen, and the explosion caused a tragedy. The reason is that the vendor directly reacts with dilute sulfuric acid and aluminum in the bottle to produce hydrogen. The reaction amount is not calculated. As a result, the pressure inside the tank is too large, and the can is directly swelled.

    The self-inflating method is to fill the bottle with dilute sulfuric acid and active metal to replace the hydrogen. The laboratory is commonly used zinc, such as the weight of the most hydrogen generated is aluminum, but both in this era are not, so Roland still intends to use iron to react–lucia can separate the very high purity of iron, the problem of slow reaction rate can be heated and increased contact area (such as iron, iron powder) to improve The coating can resist the corrosion of the bottle body by the acid solution.

    Thinking about it, he immediately drew a simple sketch on the paper – in order to reduce air leaks, the high-pressure gas cylinder should be as one piece as possible, so the bottle body is integrated, leaving only a raised threaded hole at the top. It can be screwed into the valve with a valve.

    After injecting the reactants from the hole and tightening the nozzle, these continuously generated gases have nowhere to go, and the pressure inside the bottle can reach a very considerable value. When you use it, just unscrew the valve and the hydrogen will rush out and rush into the air bag. It is also very convenient to re-crush, remove the gas nozzle, dry the water, clean out the ferrous sulfate crystal inside, and then refill the reactants.

    Considering that dilute sulfuric acid is also an alchemy product, the inflation price obviously cannot be set too low.

    It is set at fifty gold royal ones, ten charge one time, Roland thinks.