The Qin State not only developed radio technology, but also made a new breakthrough in technology.

The Qin State had already begun to use rocket technology as a weapon at the beginning of the use of gunpowder, but at that time the main use was military, not aerospace. But with the development of astronomy in the Qin Kingdom, some scientific researchers have begun to explore a technology that can ascend into space.

But with the understanding of the atmosphere, some flight enthusiasts and astronomers initially thought that Qin could reach the moon directly with airships, planes. This kind of thinking is very simple, but simplicity means spiritual attachment. The maximum ceiling of the aircraft is only more than 4,000 steps, and it is a specially modified aircraft. The ice at high altitudes makes it impossible for planes to reach higher places. And the engine also stalled because the oxygen at high altitude was getting thinner and thinner, and the plane could not reach it. Then only hydrogen airships can be used. The airship was too large, so it used a lighter hydrogen balloon as a research vehicle for the atmosphere. Perseverance is not only about courage, but sometimes it comes at a price.

Astronomers simply believe that space can be understood as long as there is no limit to the ascension. This directly led to their reckless lift-off, even though Shang Wen explained the distribution of each atmosphere, but they still wanted to tell each other through their own intimate knowledge. The hydrogen balloon eventually lifted off more than 10,000 people, and the two scientists were unconscious, but a mechanical device recorded their last arrival at the high altitude, and finally the hydrogen balloon burst, and the two of them, along with their scientific instruments, and the flight log book all fell to the ground. Qin used an army of tens of thousands to search for their remains as much as possible, but in the end they were not found. In the end, only the two things mentioned above were found.

Research always has to come at a cost. After that space exploration, Qin's researchers finally recognized some preliminary analyses of the space atmosphere based on the last records of the flight logbook. It is also the lesson of this blood that allows the researchers of the Qin State to learn to study patiently.

On the other hand, Qin's weapons researchers are distressed by one thing, that is, the development of rocket technology has encountered an unprecedented bottleneck. The Qin state was now armed with artillery of various calibers, and the range of these guns had greatly exceeded the range of rockets, on the contrary, rockets could not increase their range again, because rockets still used gunpowder as propellant. At the same time, there was a big disagreement in the selection of rocket body materials, and the Qin military's requirement was to use a cheap and lethal projectile body as the rocket material. But the actual effect is that the propel of gunpowder is not very good. The main reason is that the combustion control of gunpowder is not easy to master, and at the same time, the selection of missile body materials is too bulky, the use of cast iron materials, and the relatively light aluminum materials are used in aviation aircraft, so the display of rocket technology has stagnated.

In the Qi State, the craftsmen of the Qi State developed a large-scale offensive weapon for the Qi army. The Qi army had a large amount of guns and equipment. However, there was a serious shortage of artillery, and the Qi army had been suppressed by its opponents on the issue of firepower, although the Qi army had come up with many ways to make up for the lack of artillery. For example, the development of the simplest "wooden cannon". "But in fact, this" wooden cannon. "The actual offensive effect is not very obvious. The power of the wooden cannon is not very large, and the firing range is very limited, usually ranging from 500 to 700. This distance is within the range of a rifle, which can be easily killed by an opponent. In addition to wooden cannons, Qi craftsmen also made bronze cannons, but because no pressure casting method was adopted, the weight of the bronze cannons usually required two oxen to pull.

But the Qin newspaper gave the Qi craftsmen another way of thinking, that is, rockets, this kind of one-time dense launch of the surface weapon made the Qi craftsmen ecstatic. They think they've finally found another weapon of destruction.

But the results of the experiment are a little unsatisfactory, Qi craftsmen boldly choose the paper tube as the body of the rocket, the front is made into a cone, the rear is a square mouth, the gunpowder is compacted in the circular paper tube, and then ignited and launched, it is worth mentioning that the rocket nozzle craftsmen did not notice. They also did not see the entity of the Qin State rocket. Therefore, it is not known that the Qin State rocket used a gradual shrinking and widening nozzle technology, and the application of this technology made the Qin State's rockets reach a long range, but the Qi people did not know.

Just when the Qi people were starting a more primitive rocket development program, the Qin people made significant progress. Like the Qi people, the Qin people also used gunpowder as a propulsion device, but the chemical reaction of gunpowder as a solid fuel was really difficult to control, which caused a great obstacle to rocket technology.

Since the solid fuel reaction is too intense, can we find another fuel that can control its combustion reaction?

The answer is yes. Bai Ge was the first scientific researcher in the Qin State to propose liquid rocket technology. He has a fanatical fascination with rockets, and he's also an astronomy enthusiast with a bit of fantasy ideas. He prefers to conquer the vast universe than to conquer those lands, because the existence of Mars, Jupiter and other celestial bodies can be clearly seen in astronomical telescopes.

But how to get humans to land on these celestial bodies is what he cares about. The disadvantages of the gunpowder rocket are obvious. In particular, after mastering the combustion chamber technology, the Qin State was very dissatisfied with this backward rocket technology.

In the same way that chemical reactions usually take place in liquids, he came up with the idea of using liquids as rocket propulsion.

Combustion requires fuel, oxygen, and Qin's liquid oxygen technology only exists in laboratories, hospitals, and large steel and chemical companies. But a few are enough to make progress. The cost of Qin's rocket research system will support the success of the experiment.

The rest is fuel. Qin's cars are becoming more and more popular, and the price of gasoline is also very cheap, which is definitely cheaper than gunpowder.

The experiment began. Bai Ge elaborately crafted a rocket engine that used various metal tubes and metal vents, with two canisters filled with gasoline and liquid oxygen exposed. He used a large iron frame as a support.

Due to the use of liquid as propellant, the rocket can be ignited using electronic ignition.

"Three, two, one. Ignition. Bai Ge excitedly pressed the electronic lighter.

The fuel was soon jetted to ignite under the ignition of an electronic lighter. Then control the valve size remotely. The rocket ejected a "whirring" sound. The strength gauge of the test showed that a thrust of thousands of stones was generated in an instant. It worked.