Renault didn't take Mila's hesitation to heart. Pen & Fun & Pavilion www.biquge.info for any person, such an important thing, must think twice.

But Renault is not in a hurry.

According to Mira, there is a kind of alien people who can create a large amount of blue mist, and they have taken over a piece of land across the sea, and they don't know when they will come to the continent of Oro.

Therefore, the development of demon spirits may have become less anxious, but strengthening the power of developing science and technology is the most powerful means against aliens.

Before that day comes, you must have enough strength to take precautions so that you will not panic.

He told Mia about the aliens and asked her to find a way to get the message back to His Majesty the King in the royal capital.

If the aliens did come, he didn't mind letting them fight with the king's army first.

It's better to lose both, and he'll be able to make a profit.

So early the next morning, Renault took Charlotte to the laboratory under the machine shop to test the power of the new explosives.

The last "explosives technology" was obtained, and a total of three high-performance explosives could be produced using a mobile app.

Smokeless gunpowder, thundermercury and TNT.

Among them, smokeless powder is the propellant of a gun, like a pencil lead broken into little bits, but with a small hole in the middle, which is to allow enough oxygen in the ammunition.

As for the mercury and TNT, Renault learned from the millennium that these two things need to be used together. TNT is a stable explosive that does not explode with a slight shock or heat like nitroglycerin, but requires mine mercury to detonate.

Renault first dismantled a few of the previous shells, replaced the black powder in the warhead with an equal amount of TNT, and replaced the fuse with thundermercury, and then left Black Iron Town with the Megatron.

As for TNT, I have often heard it in movies or TV before, and it is so powerful that it can easily blow up a building. But Renault didn't know how big it was, so he decided to let the facts prove it.

Arriving in the open space where artillery shells were often experimented with before, the Megatron aimed at the cliff five hundred meters away, and with Renault's order, the barrel of the cannon spewed out thick black smoke, sending the warhead to the cliff hundreds of meters away in an instant.

Boom -

Shocking loud noise, great earthquake trembling!

The violent wave of air carried countless small debris chips, cutting through the distance of 500 meters and rushing towards everyone.

"Be careful—"

Renault only had time to shout a warning when he felt a gust of wind blow ahead.

He raised his hand to protect his eyes, and the strong wind nearly blew him off the ground.

I didn't expect the power of the explosion to be so strong, and the shock wave generated by the explosion was still so strong at a distance of five hundred meters. Even more uncomfortable was a roar in my ears, and I was temporarily deaf.

"Charlotte, are you alright?"

Charlotte, who was emaciated, was blown to the ground by the gust of wind, pointing to her ears with a pale face and a wry smile.

Renault asked the Black Iron Army to help her to sit down and rest, and he picked up the binoculars himself to check the effect of the explosion.

The depth of the explosion is unknown, and the originally steep cliff collapsed several hundred meters in size, piling up into a small hill at the bottom of the cliff.

That's the power of technology.

Compared to the power of the demons, it is more simple and crude, and as long as the method is mastered, a child with no power can flatten a city to the ground.

"My lord, do you want to continue?"

Lauren was the master who dared to hold the mortar in his arms and fire, and this time he was not lightly frightened, looking at the shells in the basket were a little worried, and subconsciously stood two steps away.

"Don't try, go back. ”

With the most intuitive understanding of the power of TNT and the countless sources consulted, Renault had a rough idea of what to do next.

In the future, Black Iron Town only needed three models of artillery.

The first is the mortar, as a single weapon, the mortars now used are all 60 mm caliber, the warhead can be loaded with 1.5 kg of explosives, and the range is about 1,000 meters.

In order to retain its advantages of mobility and lightness and easy carrying, Renault kept the barrel unchanged, only replacing the shell explosive with TNT, reducing the weight to 1 kg, using smokeless gunpowder as a push, and increasing the firing range to 1,500 meters.

For such a conventional weapon of infantry, it is enough to have such an effect.

The second type is the howitzer installed on the mountain behind the town and on the city wall.

As a city defense weapon, of course, the longer the range, the better. In the end, Renault decided to completely convert it to a 155 mm caliber with a warhead loaded with five kilograms of TNT. After testing, the shock wave generated by the explosion of the warhead can tear all the enemy within 20 meters of the landing point to pieces, and the range of shrapnel can cover a radius of 100 meters.

After also changing smokeless gunpowder as a push charge, this kind of big guy with a length of about five meters can send a warhead to a distance of 20 kilometers at most.

A total of 40 155 howitzers were installed on the back hill and city walls of Black Iron Town, and no matter which direction the enemy came from, as long as they entered the area of 20 to 3 kilometers, they would be subjected to the most intense artillery fire.

Finally, the most important thing is the tank gun.

In the end, Renault removed the 203mm howitzer from the Megatron and replaced it with a 155mm cannon.

Unlike howitzers, cannons have a longer barrel, a longer range, and a low trajectory.

Whether it is a ship or a tank, what is often needed is to hit targets at close range, and cannons are more conducive to direct aiming.

The blacksmith laboriously has a deep understanding and rich experience of the "cannon", plus Renault's mention on the side, so it was smooth sailing all the way down, and it took only half a month to basically complete the transformation.

Later, Renault modified the grenade, adding 50 grams of TNT to it, once it exploded within 10 meters, there was no live opening, and the shrapnel damage could radiate to 30 meters, which undoubtedly added a sharp blade to the escort to kill the enemy.

In the end, Renault set his sights on the manufacture of rifles and bullets.

Compared with howitzers or cannons, rifles have a more compact and precise structure, which adds a lot of difficulty to processing and manufacturing, and the requirements for steel are more demanding.

But fortunately, Renault tried to find it on the thousand-degree search, and he really found some structural drawings of M14, and the winding distance of the rifling could be checked.

Although it is a real drawing, and there is no specific size, Renault, with the mind of a modern person and as many as hundreds of tests, was finally made by him to make an automatic rifle imitating the M14.

The bullet used a caliber of 7 mm, but since there was only a lathe, the rifling was not processed accurately, which had a great impact on the accuracy of shooting.

Renault himself tried to fix the entire gun body on an absolutely stable steel frame, and the bullet had an error of 10 centimeters at a distance of 100 meters, and 30 centimeters at an effective range of 400 meters.

This problem cannot be solved unless there are more sophisticated instruments and equipment. Renault decided to give up after many attempts, it was enough to have such an effect, I don't know how many times stronger than a bow and crossbow.

Moreover, the rifle was too dangerous, and Renault finally decided to produce it in small quantities and only distribute it to the Black Iron Army.

And in two months, a hundred tanks also successfully walked off the production line.

The New Year's bell is about to ring, and as the new year arrives, Black Iron Town has truly entered the era of thermal weapons. (To be continued.) )