There is a new book "Starting from a Superstar". Please help me collect it and give me some recommendations!

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The fire dragon sprayed onto the cold stone wall opposite, and the huge temperature difference quickly made the stone wall crackle and explode. After a while, the stone wall exploded, and fine pieces of stone fell off from the cave wall.

Soon the man pressing the pressure pump became tired, and the fire dragon sprayed out by the spray train gradually weakened. Then Charles Mann jumped out from the side and shouted a few words, and the spray train stopped spraying fire.

Immediately afterwards, two box cars similar to the spray trains were pushed up from the side, but this time the water sprayed out from the cars was indeed water, cold water, poured on the previously burned stone wall, the huge temperature difference,

The stone wall exploded again, and a large number of gravel fragments fell off the cave again.

Then dozens of people rushed over, shoveling the gravel pieces with shovels, and shoveling them onto wooden carts nearby, and then transported them out of the cave one by one.

The whole process seemed very fast, and it was obvious that these people had cooperated countless times before.

At this time, Charlesman also saw Xiao Feng and immediately ran towards this side from the jet train.

"Mr. Master, when did you come back?"

Charles Mann was also very happy about Xiao Feng's return. Xiao Feng laughed and exchanged a few simple greetings with him, and then stared at the spray train in front of him carefully several times.

When he was defending the city last time, he used a flamethrower, and the effect was very good. After considering that this world happened to be rich in the kind of fierce fire oil produced by crossing local beans, Xiao Feng thought about it and wanted to try it.

Let's see if we can produce some flamethrowers in this world.

After all, compared with other weapons, this kind of weapon is more lethal. Whether it is defending the city or going out to fight in the field, this kind of flamethrower is very powerful.

If you don't plan to equip the soldiers of this world with thermal weapons, equipping them with some flamethrowers is a very good choice.

Moreover, this fierce fire oil is very unusual and powerful. It is indestructible when exposed to water. Once the body is ignited, the only way to save yourself is to jump into a puddle or bury it with soil to cut off the air, otherwise it will be burned to death.

Therefore, Xiao Feng felt that this was a very effective weapon that could enhance the combat effectiveness of local soldiers. It had sufficient raw materials and simple principles, so he gave it to Charles Mann to research.

Before he left, he probably explained the principle of the flamethrower to Charles Mann. Unexpectedly, this old boy was able to tinker with it so quickly, and so far, the effect is very good.

Charisman also deliberately explained to Xiao Feng the spray train he developed with a sense of offering a treasure.

In fact, the flamethrower, in the modern world, first originated in ancient Greece in the 1st century. At that time, the Greeks used the siphon principle and used hoses and pistons to create the earliest flamethrowers and installed them on their station ships.

It achieved a huge advantage in the naval battle with the Arabs.

Later in the seventh century, the Byzantines also used a large amount of this "Greek fire" in their wars with the Arabs, burning the Arab armies to ashes, thereby promoting the flamethrower.

In ancient China, there was also a precedent for using this kind of flamethrower, but it was much later than the Europeans. In fact, around 913, it was widely used during the warlord wars in the Northern and Southern Dynasties.

One of the most famous battles was the war between the Later Liang and the Later Tang Dynasty in 919. The iron barrel flamethrower appeared. The principle is very simple and is similar to the current single-tube push water gun.

It was not until the Song Dynasty that it was widely used in city defense and water battles. At that time, the Song Dynasty people developed a kind of fierce fire oil tank, which used a pedal-pressurized mode to spray. It was quite powerful at the beginning.

But later on, it was discovered that it had shortcomings. Because it was not airtight enough and the pressure was not strong, it could only eject five or six meters as far as possible, so it was abandoned in the subsequent war.

And the fire-throwing train invented by Charles Mann before us, because of the unique natural conditions of this world, is much more powerful than the flamethrower developed by Xiao Feng in ancient times.

In Xiao Feng's world, flamethrowers invented in ancient times all faced an important problem, that is, insufficient sealing, resulting in insufficient pressure provided by the pressure pump, so the fire could not be sprayed far.

Even though the flamethrowers used by the Byzantines were more advanced, they could only spray as far as ten or twenty meters.

In this case, it was only after the advent of rubber products in later generations and the emergence of a large number of machining processes that the sealing problems of the pressure pump and the cupping tank were solved, and the effective range of the flamethrower was greatly improved.

But even so, the maximum spray distance of a modern soldier's individual flamethrower is only a hundred meters.

And Charles Mann used the natural gum produced by a tree in this world to solve the sealing problem. He even used a tough rattan to make a hose, so that the range of the spray train he made was about 100 meters.

Compared with the flamethrowers made in ancient times in Xiao Feng's world, the spray distance is much farther.

Because there are some problems with the pressure pump that have not yet been solved, the distance of the spray is not too far, but it can still reach 34 meters. Such results can be said to be a great surprise to Xiao Feng.

In this era and with the current technology, it is impossible to miniaturize the tanker and turn it into a single soldier. However, as long as the range of the tanker is increased, the effect will be equally impressive.

If the range could reach 100 meters, then Xiao Feng could boldly lead human soldiers out of the city to fight the orcs in the field.

Even if the orcs are physically strong, and even if their archers are powerful, the range of their bows and arrows is only 100 to 150 meters.

If the shooting range of this spray train can reach one hundred meters, and if it is equipped with a group of tin can operators, Xiao Feng will be able to perform a live barbecue for those orcs.

Think about the scene of a hundred spray trains rushing in front of the orc formation and violently spitting fire. That is a tight fire blockade. No orc can even think of rushing in front of the human soldiers.

However, this range problem cannot be solved in a short time. This requires Charles Mann to study the pressure pump carefully and solve the problem of increasing pressure.

Xiao Feng also gave some solutions, such as whether the hand pump can be changed to a foot pressure pump, so that the force output by the person can be greater, and whether some pulleys can be used on the pressure pump circulation machine to reduce the pressure.

The output of human physical strength.

After all, in the era without hydraulic pumps, if you want to solve the pressure problem, you can only use your brain in mechanical design.

Charlesman recorded all of Xiao Feng's suggestions one by one. Every word of the great Master Mage can bring inspiration to him. If it weren't for the Master Mage's earlier suggestions, how could he have created anything?

The spray train that appears now is coming?

Even though the current spray trains still have many shortcomings, Xiao Feng is already very satisfied with these spray trains. Although they are not up to the standard for field battles outside the city, they are at least qualified for defending the city.

With a jet distance of thirty-four meters, next time any orcs try to climb the wall, they will be roasted into skewers by these jet engines.

"Your jet engine is very good. I think it will be called the Fierce Tanker from now on!"

"Thank you, sir, for the name!"

Of course, Xiao Feng is more willing to name this jet train with an ancient Chinese name, which means the spread of civilization, and Charles Mann will not refuse the Master to give his invention a name. If he can rely on the fierce fire oil tank in the future

Defeating the orcs will mean that he has the opportunity to leave his name in history!

After coming out of the cave, Keira took Xiao Feng to the right side of the castle. There were several factories there, two of which were blacksmith shops opened by dwarves, and one was a factory for making cement and concrete.

These are not the focus of Xiao Feng's attention. The third perfume specially controlled by the vixen Tamamo Shuichi and the jade essence manufacturing workshop are the focus of his inspection this time.

Because this vixen is very good at seducing men, Keira came here to build a new city this time, and she really didn't want to worry about leaving her at the base, so she took her with her.

She also knew that Xiao Feng attached great importance to the jade essence and perfume that the vixen could produce, so he opened a workshop for her here and assigned more than a dozen of his subordinates to help her collect various kinds of fragrances.

The raw materials needed to make perfume and jade lotion.

Moreover, she was assigned a female assistant to guard against this vixen.

Of course this vixen knows why Keira is so guarded against her. If someone else had treated her like this, the orcs would have exploded long ago with their naturally unruly temper.

However, Keira's status in this human tribe is not ordinary. She is also the lover of the human archmage, so this vixen does not dare to make any mistakes and can only obey.

She was also very surprised by Xiao Feng's arrival. She took out the recently produced jade essence and perfume as a gift to Xiao Feng.

Xiao Feng took a quick look and saw that the output was really quite a lot. The jade liquid contained only two fifty-kilogram wooden barrels, which was a full one hundred kilograms.

There were more perfumes than this, and four large barrels were put in them. During this period of time, so much could be produced. Xiao Feng was very happy. He also praised and encouraged the vixen, and by the way, he rewarded her with a lot of drinks brought by the modern world.

Drinks and sweets.

These things are ordinary things in the modern world, but here, they are the top delicacies. The vixen is also very happy to receive such a reward, which means Xiao Feng recognizes her.

Even Kayla became jealous when she saw Xiao Feng giving so many "good things" to the vixen. Before Xiao Feng could say a few more words to the vixen, she pulled Xiao Feng and left the workshop.

This evening, of course, there was another lingering moment.
Chapter completed!