“Come, try putting these two iron plates together,” Roland said.

Anna held out her finger and pressed it against the seam of the iron plate.The flame is ejected from the finger and the interface is melted at a speed visible to the naked eye.

"Reduce the firepower, and do it again on the back."

She nodded and did it all over again.The two iron plates are stitched together in 90 degrees and are firmly welded together.

Roland carefully examined the interface and found that the effect was as he had imagined - a perfect weld without any baffle.If you grind a little, the traces of the fluid when the molten iron is worn off, and the two iron plates are almost no different from the forged body.

"Very well, Miss Anna, it's all very good," Roland couldn't help but admire; "and then we'll take the other two iron plates."

"What is it?"A bucket of iron?”

“No, it’s a cylinder,” he corrected.

“The cylinder?”Anna repeated in confusion.

"Yes, it can be used to fill the air," Roland said, pointing to another square iron plate, "see the little hole above?"The air enters the cylinder from this hole and pushes the piston - uh, the piston is a plate that is slightly smaller than the inner diameter of the cylinder, and it can move freely in the cylinder."

Even Anna, who had fainted in front of so many words, “Then these... cylinders, pistons or something, for what?”

“To build a machine that moves automatically.”

The steam engine brought the impetus needed for the first industrial revolution of mankind, completely liberate human and animal power.

Its schematic is familiar to every robot dog, simply put, is an enlarged version of the boiling kettle.Burned steam is imported into the cylinder, pushing the piston and connecting rods, converting heat energy into mechanical energy.

The principle is unusually simple, but it does not mean that it is easy to manufacture.Its difficulty lies in the tightness of the cylinder and piston, as well as the manufacture of the gas pipeline.When metal processing is not skillful, it is impossible to make a qualified cylinder by hand forging.

However, Anna's ability perfectly compensated for the lack of craftsmanship.

Roland as long as the design of four iron plates of the same size in advance, so that the blacksmith shop casts and polishes, and then uses the right angle plate to fix the shape, and then welded by Anna, you can get a square cylinder with a very high stiffness.With the help of the witch, he did not have to build a barrel boring machine as in the traditional production process, and then process a circular cylinder.The same is true of other large parts, which can be made into small pieces and then spliced, so that even small workshops such as the blacksmith shop can work together to create all the parts needed for the steam engine.

In fact, before welding was invented, people could only connect small pieces by bolting or riveting, and the inside of the cylinder must require smoothing, and the conventional connection obviously cannot do this.

The only problem is the gas.Its production method is nothing special, a long iron plate is burned to red heat, and then into the groove mold, with a hammer hammer and a hammer to the molding, which is also the front of the flint gun barrel production method.But the barrel also needs to be straightened after the fact, expand the drill line, etc., more complicated.

The trouble was that Roland could not call the blacksmith to his back garden, the witch could not be exposed for the time being, and beating iron was not his own strength.In desperation, he had to let the chief knight do the work, on his own side of the command.

After three days of tossing, Roland finally spelled out the first steam engine in the backyard.

“Is that what you say is infinite?”Carter frowned at the strange machine, which he first affirmed had nothing to do with the cult ritual.Every iron pimple on it was put on by his own hand, and looked like a sealed stove.It would be unreasonable if the devil could be attracted to it.

But how do you move a bunch of iron bumps?It looks very clumsy, and has no feet, it is difficult to fly?

But in Roland's eyes, this seemingly rudimentary machine exudes industrial beauty.Standing on the shoulders of the giant, he naturally did not follow the route of the Newcomen steam engine, the Watt steam engine, and his first test product was a high-pressure steam engine with a double rod and sliding valve.Its production is not much more difficult than the original steam engine, the key is some ideas of innovation.

You'll know later."

Roland poured buckets of water into the steam room and let Anna light the firewood.

Ten minutes later, the water was boiled and rolled up.Soon, there was crackling inside the cylinder, and Roland knew that it was the sound of the cylinder being heated.The iron plate of the piston is thinner, the expansion variant is larger than the cylinder block, and will eventually be firmly on the cylinder wall.

“Isn’t that boiling water?“I didn’t know it was a stove,” Carter muttered.

When the cylinder was full of steam, Roland was excited.The piston begins to push the connecting rod outward, and when the movement is to the vertex, another connecting rod pulls the sliding valve, and the steam pushes the piston inward.The two connecting rods rotated rapidly with the wheel one after another, and as the firepower increased, the speed quickly reached the peak.

The machine made a harsh roar, and the exhaust mouth was whirling with white air, and there was an unstoppable momentum.

“Is that what you mean by the power of nature?”Anna asked in a daze.

The chief knight was in disbelief, and the last great iron wheel was installed by his old efforts, but now it spins like a feather, standing next to it, and even feeling the flow of air stirred by the wheels - this can only show that the iron pimple in front of him is so great that the strength of the iron pimples in front of him is so great.

There was a little bit of uneasiness in his heart.

His Highness said that it could replace human and animal power, if not to deceive themselves, when it replaced horses pulling chariots, by this brute force alone, it would be difficult for ten knights to resist.

It takes fifteen years to train a qualified knight, and it takes only three days to build such an iron stove.Counting the time it takes for a blacksmith to build parts, it’s only a week.

It does not need to be fed, not afraid of cold and hunger, nor afraid of arrows and knives.As long as the front is mounted on the bump angle, it can be ramped up on the battlefield.

Is it necessary for the traditional knights to exist?

**********************************************************************************

In the evening, when Roland returned to the bedroom, he saw the Nightinginge again.

This time she did not wear a hood, sitting smiling at the table, with a few pieces of parchment in her hand, "It seems that the rumors outside can't be believed."It is said that the four princes are not unlearned, have a bad character, and in fact are not more than the court masters.On this piece of paper, is the design of the iron stove?You call it a steam engine, right?

I go, can you leave some privacy, want to come, want to go, you think this is your home!Roland's heart was full of heart, and still replied if nothing else, "the design is correct, but without Anna's help, it is only a drawing."

“What can it do?”

"Many, mines, drainage, metallurgy, forging, wherever a lot of effort is needed, it can play a role."

"Then I took it," said the Nightingale, rolling the parchment and putting it in her robe, "and there are people in the meeting who can control the flames."

“Hello—”

She waved her hand and stopped Roland's protest, "Of course, I'm not taking your stuff for nothing, you'll see this first."She put a small white thing on the table.

Roland walked over, pinched his finger, and found that it was a roll of paper.

He opened his eyes and said, “This is...”

"The letter of the pigeons," said the Nightingeon in a mocking tone, "the recipient is your maid-in-waiting, and it seems that your harem is not stable."

“I didn’t touch her,” Roland frowned.

Tyre, the woman seems to have followed herself very early, the original four princes were very interested in her, but several times the harassment failed to succeed.This time, the border town simply promoted her to the maid-in-waiting and served herself, and her room was arranged next door.Did you know that it was the eyeliner arranged by the king's brother?

Although the letter was not signed, according to the content, eight or nine out of the letters were written by those brothers and sisters.The letter said that the last failure made the master very unhappy, and the next time he took advantage of the long song fortress riot, he would never be allowed to fail again.Well, you’ve already succeeded, he thought, or you wouldn’t be Roland Wimbledon.

The letter is unlikely to have been forged by the Nightingers, for only those involved in the plot will be well aware of the first assassination plan.If the nightinge wants to kill itself, there is no need to be so troublesome.

“Did you steal from her?”

"Your maid-in-law is not so stupid, she plans to burn after watching it."Unfortunately, when she looked at me, I was just behind her," she made a bag call, "so, what are you going to do?"Do you need my “handling” help?

Roland naturally understood what the handling meant in her mouth, and hesitated for a moment, and he finally nodded, "Please."He didn't have the confidence to do it himself, "ask me if you can... ask me who's behind her."

"As you wish, Your Highness," said the Nightinge, smiling and bending over, "then this volume of drawing is a reward."