Release that Witch

After the meeting, Roland left Barov alone.

"You also saw that the current chemical laboratory dignitaries, the Grey Fortune industrial company dignitaries, and then I intend to mass produce soap and perfume, which also requires a lot of manpower." The prince said bluntly, "wait most of the townspeople Through the assessment of primary education, at least next year, and the full play is also six or seven hundred people, not enough. I need more people."

"If you recruit from the fortress..."

"No," Roland interrupted. "After the city is built next year, the fortress will be connected to the town as a whole. This is equivalent to putting the money in the left pocket into the right pocket. I need more people outside the West."

"This..." Barov is somewhat guilty. "I am afraid that it is not so well solved. If you go to other cities to fish, the local lords will not sit idly by."

"Don't go to the city," Roland put his fingers into the cup, took some ice water, and slashed on the table. "I don't know if you noticed that the gray castle has been in war since the end of the demon month." Including the three attacks on the Southland by Tiefko, the Eagle City was burned and the surrounding villages and towns were severely damaged. Then the Northland was conquered and the title and territory of the Duke of Ace were deprived of treason. Finally, the east This sea attack, "he struck **** the tabletop, leaving a water stain," so that Haifeng County, Jinsui City, and Raven Fort have been greatly affected, not to mention the surrounding small towns. From the number of people who fled to the capital, it can be seen how much the loss is heavy."

"You mean..." Barov showed a thoughtful expression.

"Promoting the West," the prince wiped out all the water. "In the past six months, only the West has been in peace, there is no mandatory recruitment, and no war has been attacked. In particular, the first point of the world, the use of civilians, Will recruit and even plunder civilians everywhere, no one can guarantee that this time will not fall on their own heads, so a stable place to isolate the war is the main point of our propaganda."

"I probably understand," he thought. "Are you going to attract civilians from other towns and villages by not giving up, not serving, and providing shelter, food, and stable work?"

"Almost," Roland nodded with a smile, and his thoughts and ability to accept have always been the advantage of the assistant of the minister. "And it is also important to publicize the generous treatment that people who are literate can enjoy. I think there will be some nowhere in these places. The knights and nobles are willing to come to the West to try their luck."

Whether it is a village or a town, it is almost the territory of a small nobility. If you are in peacetime, even if the land is poor again, the operation will be poor, and you will be able to fill your stomach with a few acres of land. However, if the population loss during the turbulent period 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 publicize, he believes that the other party has its own way.

"But Your Highness, as a result, the placement of these people is a cost, and the food can not be interrupted," Barov hesitated. "If there is any accident in the caravan, the town hall treasury will soon It’s dry.”

"Well... what you said makes sense." Roland touched his chin. The most important task of the new political force is to establish prestige and confidence in the hearts of the people. If you suddenly fall into the predicament of not paying, the good situation will turn sharply. "That way, you should go back and do a good job, wait until the caravan and the town complete the next month's transaction, and then implement the vault."

"Follow, Your Highness," Barov raised his chest.

After explaining the task, Roland returned to the office and began to think about how to complete Margaret's balloon order.

The price of a thousand gold dragons is higher than that of a steam engine, but its cost is much lower. Airbags are mainly drawn by Soroya, while hemp ropes and bamboo baskets are cheap. In fact, Roland has experimented with a simple sample in the arsenal yard: a hydrogen balloon that can carry both lightning and wheat.

After repeated considerations, he eventually abandoned the hot air balloon program. The 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, far less than hydrogen. It's easy to get.

The prototype is made of a single-sided water coating, and the paper on the back is burned after painting. As a result, the entire airbag 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. The wheat mash became a variety of birds and rushed to the mammoth without leaving any traces. Only the iron needle could penetrate the millimeter thick. coating. Due to its extremely light weight, a hydrogen balloon of about two meters in diameter can carry an adult into the air.

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

The DC motor used to produce hydrogen for electrolysis of water cannot be sold. It is obviously not cost-effective to inflate all hydrogen balloons after a motor is connected to the steam engine. If you want to continue to earn gold dragons 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 by the wall. It can be done with pig iron and wrought iron. Anyway, there is Anna, and precision machining is not a problem. The key is that the pressure of the gas cylinders in the afterlife is above 20mpa. It is undoubtedly a fantasy to hit the pump. Ten unicorn arms are useless, at least high-pressure air pumps are required. If the pressure inside the bottle is not enough, there is no way to fill the hydrogen 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.

What inspired him was the news that he had seen before: the vendors selling hydrogen 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. Zinc is commonly used in laboratories, and aluminum is the most abundant in hydrogen production, but neither of them is in this era. Therefore, Roland still intends to use iron to react with Lucia to separate the iron element with high purity and slow reaction at normal temperature. The problem can be improved by heating and increasing the contact area (such as iron sheet, iron powder), and the inner coating can resist the corrosion of the bottle by the acid.

Thinking about it, he immediately draws a simple sketch on the paper. In order to reduce air leakage, the high-pressure gas cylinder should be as one piece as possible, so the bottle body is integrated, only a convex threaded hole is left at the top, which can be rotated. Enter the valve with the valve.

After injecting the reactants from the opening 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 the valve, the hydrogen will rush out and rush into the airbag. 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 50 gold dragons and one charge, ten charge is sent once, Roland thinks. (To be continued. Your support is my biggest motivation.)