Although the internal combustion engine has been built, it is still very rough, and it will take a long time to improve it if it is officially used.

At the very least, the miniaturization had to be completed, and the volume had to be reduced by at least two-thirds before his idea could be realized.

Coming from Earth, Xiao Han has always had an expectation for gunpowder weapons.

Hoping that one day he would be able to build tanks, planes, artillery, and thus have his own steel army, but the truth slapped him in the face.

Because of the existence of the tech tree, three types of tech fruits have been found just for explosives.

All three types of explosives were also made, and bullets were used to make them, as well as matching muskets, but they were of little use.

Whether it is the gunpowder of the human race or the gunpowder in the goblin bomb, its power is extremely limited, the firing distance is only more than 1,000 meters, and the effective firing distance is less than 800 meters.

This power is much worse than a three-bow crossbow, as long as you wear a mortal second-grade armor, it is countless times stronger than the body armor, and it can easily block the attack of bullets, and the firearm cannot play its role at all.

Unless there is more powerful gunpowder in the tech tree, at least in terms of rate of fire and distance, it is farther than the bolts fired by a three-bow repeater, which is worth mass production.

Because there was no high explosives, his tank corps could only run aground.

However, with an internal combustion engine, it is theoretically possible to create a tracked armored vehicle, loaded with a dozen three-bow repeaters, and its firepower should not be underestimated.

What's more, such an armored vehicle can be operated by only ordinary soldiers, and the three-bow repeater crossbow loaded on the armored vehicle can also be operated by ordinary soldiers.

It's just that this can only be thought about for the time being, and the research on the internal combustion engine took more than two months, and it is estimated that it will be impossible to get an armored car without a year or two.

For this, Xiao Han was not too disappointed.

Although it may take a year or two, because of the technology tree, if you get some high-level mechanical corpses one day, you may be able to complete it in a month or two.

Thinking of this, Xiao Han was a little excited, and then turned on the light screen, and pointed to the technology tree, the last batch of corpses should almost be decomposed today.

Five days ago, the technology tree had grown to a meter tall, and at the same time, its ability to decompose and absorb corpses had become much stronger.

But now, not only can it absorb one round in five days, but its own storage space has also doubled, and there is no problem at all to put more than a hundred corpses in at a time.

This allowed him to absorb all the corpses of scientific and technological talents on the eight islands in more than a month.

"Hey, there are so many technological fruits, I just don't know how many can be useful." Xiao Han muttered, reaching out and stroking it on one of the branches on the technology tree.

In an instant, more than two thousand technology fruits were taken down, and many of these technology fruits were duplicates of the technology fruits that were picked before, and he didn't bother to look at them, so he handed them over directly to Ling Yidao: "It's all about manufacturing here, you go and identify it, and then watch the distribution!" ”

With Xiao Han's words, all the scientific researchers around them became excited, staring at Ling Yi with their eyes.

Only by absorbing more scientific and technological fruits will they have more knowledge and better treatment.

What's more, if you can become a supervisor and independently research a project of your own, you can have a private room of your own, and then introduce your family members to it, and you can do some embarrassing things after work.

Ling Yi didn't pay attention to the gaze of the surrounding crowd at all, and directly found a cloth bag and packed all these technological fruits, now is not the time to look at these things, and the distribution cannot be completed in one day.

If you want to get these technological fruits, you must have a corresponding contribution, or have a talent for this area, so that there will be an unlimited supply of technological fruits.

After putting away these technological fruits, Ling Yi asked with a smile: "My lord, now that the internal combustion engine has been made, what are you going to do next?" ”

"My lord, what's wrong with you?" Ling Yi said and gently nudged Xiao Han.

At this time, Xiao Han didn't have the heart to deal with him at all, but his face had a depressed expression, and he muttered: ", I knew this earlier, why did I waste so much energy to study the internal combustion engine!" ”

The light screen was still hanging in mid-air at this time, and it was clear that there was a different fruit ripening on the technology tree.

This fruit is one of the three fruits that come with the technology tree, and when the words on it turn, you can vaguely see that it is the words primary energy converter.

Although his face was full of depressed expressions, Xiao Han still reached out and picked the fruit, and handed it directly to Ling Yidao: "You eat this fruit, eat it now." ”

Hearing Xiao Han's command, Ling Yi did not hesitate, and immediately threw the fruit into his mouth, and a painful expression immediately appeared on his face, but he had experienced this many times, and he could still bear it.

While Ling Yi was eating the fruit, Xiao Han glanced at the technology tree, where the fruit had just been picked, another fruit appeared, but it was still very small.

At the same time, the place where the crystallized mud and R1 alloy were previously produced also produced a fruit at the same time.

Xiao Han looked stunned, and his face immediately showed a hint of joy, none of the fruits produced in these three places were useless, and now they were giving birth to new technological fruits.

The next time they mature again, they will definitely give birth to better technology and bring greater benefits.

Ten minutes later, Ling Yi finally recovered from the pain, and Xiao Han hurriedly asked, "How is it, how long will it take to get it out." ”

"Hey, my lord, this thing is much stronger than an internal combustion engine!" Ling Yi chuckled lightly, and said with excitement on his face: "Give me five days, you should be able to get a prototype in five days." ”

"Yes, you don't need to be in a hurry about this, you can study it slowly." Xiao Han nodded, he didn't say anything, five days is not too long, he can afford to wait.

Through the introduction of science and technology, the volume of the primary energy converter is much smaller than that of the internal combustion engine, about the size of a basin, and the length, width and height are no more than 50 cm.

Theoretically, heat energy can be converted into kinetic energy, and it works on a similar principle to an internal combustion engine, but with a more elaborate design and more elaborate materials.

Of course, there is one of the biggest advantages, the energy utilization rate can reach about 70%, and the energy utilization rate of the internal combustion engine they have just made may not even be 20%.

Seeing that Ling Yi was busy with people, Xiao Han touched his head, turned around and walked out.

He hadn't eaten the relevant technology fruits, and he couldn't understand most of what these people were busy with, so it was best to leave.