Chapter 315

Shuangqing University, Doctorate Dormitory No. 6, Dormitory 056.

Shi Lei was very satisfied with the Shadow Dragon's ability to control its noise. In order to test the Shadow Dragon's maneuverability, Shi Lei directly used the cramped environment of Dormitory 056 to test it out on Shi Lei.

Controlling the U-shaped joystick, the Shadow Dragon moved nimbly within the cramped space of the dormitory. Its maneuverability was excellent, especially when it came to changing directions.

The bottom of the Shadow Dragon's cabin used three cameras to monitor the scene in real time. In addition, the Shadow Dragon had a symmetrical design with four propellers.

When changing directions, there was no need to turn. It could directly move forward, backward, or in any other direction. In this aspect, compared to the Steel Model, the Shadow Dragon had a very obvious advantage.

The excellent maneuverability allowed the Shadow Dragon to move freely within the cramped space, as though it was not restricted at all.

Slowly lowering the Shadow Dragon, Shi Lei nodded in satisfaction. The Shadow Dragon already had two advantages. Whether it was its maneuverability or its noise control, it was very suitable for complex urban environments.

In particular, its maneuverability would allow the Shadow Dragon to move around with ease in an urban environment.

"Little Li, how's the Shadow Dragon's defense?" Shi Lei asked with a hint of concern.

Whether it was the somewhat flimsy looking propellers or the exposed live capture cameras. They did not look like something with high defense.

Li Chai's next words confirmed this point!

"Stone Head, the Shadow Dragon's defense cannot be compared to the Steel Model! After all, the Steel Model uses special aviation metals, while the Shadow Dragon is only made of aluminum alloy. Whether it is a handgun, a miniature submachine gun, or even a high-altitude projectile, all of them can cause fatal damage to the Shadow Dragon, "Li Chai said somewhat awkwardly.

However, Li Chai immediately continued, "Stone Head, although the Shadow Dragon's defense is not good, its production cost is far lower than the Steel Model! The Shadow Dragon without the weapon module only costs a little more than 65,555 yuan! Most of the costs are concentrated on the onboard computer, high-efficiency lithium batteries, and the ranging radar and cameras. These parts can be recycled and reused repeatedly. "

Shi Lei nodded helplessly. After all, the production cost was only one-tenth. Moreover, Shi Lei was not surprised by this answer. No matter how he looked at it, Shadow Dragon didn't look like a mech with high defense.

Shadow Dragon's role was to carry out missions in urban environments. Due to the safety issues in the city, most criminals did not have firearms. Therefore, it was unable to harm the shadow dragon!

Inside the small CNC machining center, the processing of the electromagnetic cannon barrel was finally completed. Li Chai opened the hatch of the small CNC machining center and removed the cannon barrel from the tooling. With a strange smile on his face, he stroked the silver-white metal tube that was about ten centimeters long.

Shi Lei felt a chill in his heart. Little Li's actions were too wretched, as if he was masturbating.

"Xiao Li, watch your image!" Shi Lei couldn't help but remind him.

Li Chai chuckled. "Stone Head, don't look down on this cannon barrel. Although it's only ten centimeters long, it costs two thousand yuan!"

"So expensive?" Shi Lei looked at the short tube and did not understand why it was so expensive.

Li Chai explained, "Stone Head, this is a special kind of metal. It can better adapt to electromagnetic effects and allow the cannon to reach a higher initial velocity! Just the special diamond drill used to process it cost twenty thousand yuan! Although it's a little expensive, the effect should be good! "

"Try it?" Shi Lei said with some anticipation.

"Let me assemble it first!" Li Chai took the ten centimeter electromagnetic cannon barrel and went to the workbench. He inserted the cannon barrel into the mechanical device.

The mechanical device was the core of the electromagnetic cannon, the accelerator and switch. The electromagnetic cannon had three main parts: the energy device, the accelerator, and the switch.

The energy was provided by Shadow Dragon. Li Chai designed the accelerator and the switch in the same part. The switch was also connected to Shadow Dragon and was automatically controlled by Shadow Dragon.

After the cannon barrel was installed, Li Chai took out a bag of steel balls and inserted it into the electromagnetic cannon's ammunition supply system. The miniature electromagnetic cannon designed by Li Chai used solid steel balls that weighed five grams.

Li Chai introduced the basic parameters of the miniature electromagnetic cannon to Shi Lei while installing it. "Stone Head, with Shadow Dragon's energy situation, it can only support fifty shots at most. And each shot will consume about one minute of hovering time in the air. "

Shi Lei frowned. One shot consumed one minute of hovering time in the air. What an extravagant electromagnetic cannon!

"How's the power?"

Li Chai found a piece of draft paper on the workbench and handed it to Shi Lei. "The calculated data shows that the power is quite impressive. Five grams of solid steel balls with an initial speed of 355 meters per second! "

Shi Lei did not understand the meaning of the data, so he said directly, "Little Li, give me the distance and tell me how powerful the miniature electromagnetic cannon is!"

As the saying goes, every profession has its own specialization. Shi Lei was a super expert in the computer industry, but in the mechanical industry, he was a rookie.

Although Li Chai did not know much about computers, he knew what Shi Lei did not know.

"Stone Head, according to the kinetic energy formula, E = 67MV ², which means the kinetic energy is equal to half of the mass multiplied by the square of the velocity. The speed of the miniature electromagnetic cannon is 355 meters per second, and the weight of the solid bullet is 5.550kg, so the kinetic energy is 6155 Joules. This is a very impressive number! "After Li Chai finished explaining, he found that Shi Lei was still confused. Obviously, he had explained in vain!

Shi Lei coughed and said, "Just say it directly. What is the same power as it?"

Li Chai thought for a while before giving an example. "Stone Head, you know about the M9 Carbine, right?"

In his previous life, the M9 Carbine was Shi Lei's favorite. It was excellent in terms of shooting speed, accuracy, and range.

"Yes, I know!" Shi Lei nodded and said in surprise, "Could it be that the power is similar to the M9 Carbine?"

Li Chai nodded. "That's right! The muzzle velocity of the M9 Carbine is 335 meters per second, the kinetic energy of the muzzle is 6190 Joules, and the weight of the bullet is slightly less than five grams. Our miniature electromagnetic cannon is almost the same as the carbine in terms of kinetic energy, which means the power is almost the same! "

After listening to Li Chai's explanation, Shi Lei realized that his previous thinking about the power of the electromagnetic cannon was wrong. It turned out that the power was not only based on the speed, but also the mass of the bullet and its kinetic energy.

Kinetic energy was energy!

The higher the energy, the greater the destructive power, and the higher the power!

There was another example that showed the power of the miniature electromagnetic cannon. That was the famous Black Star Type-09 pistol, which only had 935 Joules of kinetic energy at the muzzle.

After understanding the power of the miniature electromagnetic cannon, Shi Lei finally smiled. However, Shi Lei had another question. Although he did not know much about physics or the conversion of energy, Shi Lei still knew that one kilowatt-hour of electricity was equivalent to one kilowatt-hour of electricity, which was equivalent to a lot of Joules.

Why did one shot of the electromagnetic cannon consume one minute of the Shadow Dragon's endurance?

Shi Lei asked his question. Li Chai took out a more detailed diagram and explained it to Shi Lei.

According to the conversion of energy, one kilowatt-hour of electricity was equivalent to 8.1 million Joules.

The Shadow Dragon used distributed batteries as its energy source. There were a total of five batteries installed, which were the four frames of the propellers and the main battery compartment. The total capacity of the five batteries was 7.7 kilowatt-hours.

Each of the four propellers had a power output of three million watts. The four propellers added up to 6.7 kilowatt-hours of electricity, which consumed 6.7 kilowatt-hours of electricity.

The Shadow Dragon also had an onboard computer, a ranging radar, and a surveillance camera. These also consumed about five million watts of electricity, which was 5.0 kilowatt-hours of electricity.

The Shadow Dragon consumed 6.2 kilowatt-hours of electricity, which left 5.0 kilowatt-hours of electricity, which could support the flight for more than ten minutes.

The maximum flight time of eighty minutes was still an ideal situation!

One shot of the electromagnetic cannon only had 6,155 Joules of energy. For the Shadow Dragon, which had close to eight million Joules of energy, why did it need to reduce the flight time by one minute?

According to the calculation of the total energy divided by the total time, it was about eight million Joules of energy. Divided by the eighty minutes of flight time, it consumed about 655,555 Joules per minute.

Wasn't the difference between 655,555 Joules and 6,155 Joules a little too big?

Actually, it was not. Due to the limitations of the technology, materials, and the structure of the miniature electromagnetic cannon, the conversion efficiency of the Lorentz force and electromagnetic effect was very low!

A conversion rate of only 6.1% was not surprising!

After listening to Li Chai's explanation, Shi Lei coughed and asked, "Little Li, in short, the miniature electromagnetic cannon still has a lot of room for improvement in the future?"

"Yes! You can say that! With the improvement of the technology and technology, there will be better materials and a more advanced framework. Our electromagnetic cannon will eventually become more and more powerful! "Li Chai said confidently.

Shi Lei clapped his hands and said, "That's good to hear! Little Li, install the electromagnetic cannon first. I want to test it myself and see how powerful it is! "

The installation process of the electromagnetic cannon was very fast. Whether it was the electromagnetic cannon or the MP2 submachine gun, they were all designed in a modular manner.

As long as it was a standard modular design, it only needed to be installed in a few minutes!

Li Chai spent seven or eight minutes installing the electromagnetic cannon and the shadow dragon together. After checking to make sure there were no problems, he said to Shi Lei, "Stone Head, there are no problems!"

Shi Lei checked the feedback from the ECH system. There was still seventy-six percent of the battery left. It could fly for about fifty minutes.

As the shadow dragon rose into the air, Shi Lei controlled it to fly out of the living room and into the outside world.

Li Chai said nervously, "Stone Head, the electromagnetic cannon is very powerful. What are you going to use to test its power?"

(To be continued. If you like this work, you are welcome to come to qidian.com to vote for me. Your support is my biggest motivation.)