The different ranks of the evolved officers represent an era. The definition of materials is different in each era, for example, in the Bronze Age, the earthlings never had the concept of steel as a material. In the Captain's imperial era, there were also no soybeans, and the improved varieties of peanuts were stored exclusively as strategic materials. Zhao Weiguo's material exchange list Ren Di has seen, that is the richness that makes Ren Di's eyes greedy, but Zhao Weiguo is a school officer, Ren Di is a lieutenant officer, although Ren Di is in the same camp as Zhao Weiguo, but the upper limit of material exchange in the Haisong plane can only reach the captain level. However, the evolution officers in Ren Di's area are all earthlings, and their material exchange does not appear in ancient species, such as saber-toothed tiger fur and mammoth meat. There are no alien species either, and all the materials are from the history of Earth civilization.

This is the common attribute of the officers of the evolution of the earth. If Ren Di's exchange authority is at the rank of colonel, Ren Di will grow a large number of industrial crops such as peanuts and soybeans in this world, and engage in biofuel technology. There is no shortage of territory in this world, and this large amount of territory is vacant between the lords' territories as a space for bandits to cut paths and for merchants to operate. For the lords to rule the fiefdoms of the rich regions, as for the rest of the land, it was empty. It becomes a place for galloping horses.

However, this world is an oil-producing crop, and it is a fungus-like plant, without sunlight, when the big tree in the forest falls, under sufficient water, this fungus will grow all over the trunk, absorb fibrous nutrients, and quickly form a huge umbrella cover, the umbrella cover has a large number of granular seeds, the size of sesame grains, will follow the forest animals will eat this umbrella cover, chew and eat to obtain energy, of course, some unchewed, will be excreted with feces. Sowing the whole forest is carried out.

This seed is very high in oil. As long as there is enough wood to decompose, it can grow from a seed state to a huge umbrella cover for sowing in two weeks. So far, the Dawn Commune has just started to use this crop, processing leftovers from felled trees and large quantities of straw from farmland. Since there is no need for sunlight as long as the water supply is maintained, you can quickly obtain seeds with high oil content, Ren Di when he saw this crop, there was a kind of depression about how people in this world were so lucky, by asking the evolution space if this crop could be exchanged in the future, the evolution of the categorical narrative is that it is not a crop in the history of his own region, and cannot be used as a material.

But now this plane does not prevent Ren Di from using it like this, and Ren Di has the technology of turning vegetable oil into fuel, and a large amount of unsaturated vegetable oil can be turned into alkane diesel through hydrocracking. It provided the power source for the world's first internal combustion engine machinery.

A monoplane propeller with two machine guns soared in the sky. With the movement of the army, the army of the Dawn Commune is now approaching the era of mechanization, of course, it is only approaching, there is no tank corps, and this wave of Yunchen and has only three hundred heavy self-propelled guns and two hundred and seventy-six aircraft. Ren Di spent a lot of brains on this aircraft design, because this air pressure is three times that of the earth, and the wings of the aircraft can gain greater upward force, but also have to withstand greater drag. If it's for speed the propellers can be a little smaller, the wings can also be a little smaller. The shape of the fighter plane is not the same as that of the Earth. There is a propeller hanging from the front, and the wings are the design of the swept wings of the supersonic era of the earth. The body is made of aluminum alloy material.

As for the flight speed, the machine engine burns diesel, and all high-power engines will inevitably dissipate heat when they output energy. Let the entire engine overheat. And those mages in the sky who rely on wind magic to glide are life, after all, they are life, and only cold-blooded animals in carbon-based lives can withstand large changes in body temperature, but this kind of large change in body temperature, taking crocodiles as an example, crocodiles that do not bask in the sun, the slow movement is a dish. You can just drag your tail and pull it into the fire for barbecue. In the advanced homeothermic animals, the precision of various chemical reactions in the body is very high, and the synthesis of a certain protein and vitamin in the body is slower or faster because of the temperature, and your body will definitely have problems. For example, stomach and intestines are cold, endocrine disorders and so on.

If it's going to fluctuate violently, well, a high fever of thirty-nine degrees and twenty hours. It's two degrees higher than body temperature, who thinks that if you come here, you can go to work the next day? The release of energy from the mage is limited by the nature of carbon-based life, and it must also be a gentle process. A large fireball spell is in the mana dispatch, and it needs to be contacted many times when it is released outside the body. And the spell casts with a CD. If you are more involved in the release of shares, you will feel tired, which is a phenomenon of cellular life in the body, and the feeling of needing to readjust under the interference of energy.

In short, carbon-based life should not compare power with steel machines, unless you cultivate to the point where you do not eat the fireworks of the world, only eat lead and mercury elixir, get rid of the limitations of carbon-based life, and evolve in the direction of T1000 Terminator, of course, get rid of the body of carbon-based life, and the desire for carbon-based life will be desireless. Become an innocent true immortal sage.

But it seems that the world can't do it to the point where magicians can't do it. It is very free to fly against the wind, the great magician can achieve a flight speed of eight # ninety meters, while the flight speed of an intermediate magician can only reach a maximum of 40 meters per second, of course, the flight time of the great magician is by no means comparable to that of an intermediate magician. Of course, what about aluminum alloy machines? This strange aircraft with swept wings and a propeller nose takes off from a 50-meter runway and rises directly at a large inclination, reaching a speed of 120 meters per second when diving from the sky. With a take-off weight of 1.6 tons, it carries a crossover cannon with two wings attached.

Of course, this flying machine is not as dexterous as a magician's free flight, but the key situation is that the person flying this kind of fighter has no sense of magic at all? Pilots, a high-level service, are of course operated only by new mages who have a strong revolutionary will and an urgent revolutionary need.

And this battle in the sky was not a grappling and dog fight from the beginning, but a knight-like charge war. Sky Knight Heilan stroked the soft fur of his mount, as a Sky Knight. Heilante is one of the few men, and the air knight needs to strictly control his weight, not only without flashy armor, but also to control his diet as much as possible. And the large Raptor that Heilante sits on can reach ten meters with a wingspan. Absolute behemoth, the Empire had no choice but to take out this air force to deal with the threat in the sky.

However, it was useless, and Heilante felt the panic of his mount's body and wanted to quickly escape from this heavenly area. A sound that had never been seen before in the sky cut through the sky, and it was not the chirping of any birds, it was the sound of the metal body rubbing against the air, the sound of the propeller speeding through the air.

Twenty warplanes in the distance also seemed to have spotted a large raptor in the sky, and randomly used this team of raptors to cross a huge circle, directly around the direction of the sun, and when they circled this circle, they were spiraling.

There is no so-called scene where the Sky Knight shoots down the fighter with a bow and arrow, because the fighter does not enter the range of the bow and arrow at all when it finds the Sky Knight, but relies on the brute force of the machine to quickly rise and climb to the attack angle.

Heilan suddenly controlled the sitting raptor to descend rapidly, why is it descending? Because the climbing speed of birds cannot be compared with that of fighters, Heilante has seen three fighters strangling his own type of sky knight.

Sure enough, as Heilante expected, the plane climbed to a certain height, and it was very disgusting to turn its back to the sun in the sky, and began to dive towards the birds of prey below. The Raptor simply couldn't look directly at this huge, extremely fast attacker. This routine of birds of prey is very familiar, because birds of prey catch small birds also dive in this way, with the buff of the sun, dive from high altitudes, large birds of prey never compare with small birds in low altitude than flexibility, directly in the sky, when you see the shadow of your wingspan aimed at the target below (at this time, the target will look up and find that the bird of prey is in the sun. ), swooping down directly, how can you still have flexibility in your eyes when you are dazzled by the sun.

The tactics of the Dawn Commune fighters at this time were the tactics of birds of prey catching birds, and when they were aimed at something with such a terrifying momentum from above, they swooped down. These overlords in the sky suddenly flooded with fear in their blood, and it seemed that this was how the giant dragon once killed himself.

Dozens of Sky Knights suddenly dispersed in panic.

Abu, the new magician of the Dawn Commune, as a new magician, he discovered a seemingly slow magic energy interference point in front of him twenty kilometers away, so he quickly pulled up the fighter plane, and finally caught such a sky knight flying in formation. Follow the tactical textbook. Completed the ascent in the sky, in the process of chemical energy being continuously converted into kinetic energy, and then continuing to be converted into gravitational potential energy, the momentum of the fighter plane in the high altitude is climbing.

Situation -- what the army must pay attention to in combat. When the momentum of the plane climbed to the top, with its back to the sun, when it dived straight from a high altitude, a kilometer apart, Heilante felt a sense of the end of the world, this feeling was like the feeling of an unarmed civilian facing a heavy cavalry charge, and even worse, a six-ton object, aimed at you from the sky at a speed of more than 100 meters per second, this is the muck truck stepping on the accelerator on the road, giving the person in front of the feeling.

How can birds and people, who are living beings, not be afraid? The magic probes on Abu's two wrists lit up instantly, which was a call to input mana. Because the birds of prey in this world are more or less gifted with wind magic, not to kill people, but to pull out a huge wall of qi at the moment of falling, on the one hand, to slow down themselves, and on the other hand, to press the running animals directly to the ground. Of course, these birds of prey will also unconsciously use their magical abilities to control their feathers when flying.

Feeling the probe pointing on the wrists of both hands, at 500 meters, twenty fighters buttoned the button of machine gun firing, and under the huge recoil of the machine guns on both wings, the planes slowed down suddenly, and the bullets turned into barrages and covered the team of birds of prey in the sky. Feathers and blood, human corpses and bird corpses, just like that, fell into the sky. After the twenty fighters finished strafing, they quickly stretched and flew away, and Heilante, who was hanging on the branches, straightened his dislocated arm and looked at the solid# fixed-wing aircraft that was flying away. There was a complicated look in his eyes, and a profession seemed to be completely outdated from the battlefield.

It's not just the Sky Knight who is left behind. The situation on the entire battlefield has changed, fifty kilometers southwest of the imperial capital, a huge forbidden space realm magic is maintained under the light of the magic array. The whole principle of the forbidden sky magic needs to be easily explained, although this airspace looks like nothing, but it is wrapped in a huge bubble, this bubble you can't see, because it is very thin. Anything that is subtle, once it is given extraordinary strength, can have an amazing effect. For example, a nano-flying wire that can cut a ship into playing cards.

And what happens when such a layer thinner than a plastic film is enveloped in the sky? Just like a soap bubble, when a large bird crashes into it, this huge bubble is like being blown in, and the concave becomes a large bubble that firmly envelops the large bird. The large bubble will be completely isolated, and the air flow of the bird's wings will be completely restrained by this invisible bubble. After the whole bird loses its stretch, it will fall directly to the ground with this bubble, and when it falls to a certain speed, the whole bubble will disintegrate, and the frontal raptor that is falling by strong gravity will directly hit the ground. This is forbidden magic.

Of course, if the kinetic energy of the object is very large, the bubble will be directly shattered under the distortion of the huge air current. But this test Yunchen and not ready to do. This is a magical world, and what is difficult to do with technology can be done by magic, but what is also difficult to see with the naked eye can be detected by new magic. None of the planes piloted by the new Hairdresser entered the Forbidden Space. And this city with a forbidden space is waiting for cannonballs. This is the wizarding world. A fair wizarding world.