Shuangqing University, Doctoral Dormitory Building No. 1, Dormitory No. 501.
Shi Lei was very satisfied with the noise control of the Shadow Dragon. In order to test the control flexibility of the Shadow Dragon, Shi Lei directly used the small environment of the 501 dormitory to conduct the test in Shi Lei.
Controlling the U-shaped joystick, Shadow Dragon moves flexibly in the small dormitory space. The control performance is very superior, especially when it comes to changing directions.
Because the bottom of the Shadow Dragon's cabin uses three cameras to monitor the scene in real time, and the Shadow Dragon has a four-propeller symmetrical design.
When changing direction, there is no need to turn at all. You can go directly forward, directly backward, or in any other direction. This is a very obvious advantage compared to the Steel.
The good control performance allows Shadow Dragon to move freely in a small space without being restricted at all.
Slowly lowering the Shadow Dragon, Shi Lei nodded with satisfaction. The Shadow Dragon already has two advantages. Whether it is flexible control performance or noise control, it is very suitable for complex urban environments.
In particular, the flexible operating performance will make the Shadow Dragon easy to operate in an urban environment.
"Little Lizi, how is Shadow Dragon's defense?" Shi Lei asked with worry.
Whether it's the propeller blades that look a little thin or the exposed live-action capture camera, they don't look like anything with high defense.
Li Guai’s next words confirmed this!
"Brother Shitou, the defense power of Shadow Dragon cannot be compared with that of Steel! After all, Steel uses special aviation metal, while Shadow Dragon is only made of aluminum alloy. Whether it is a pistol, a micro submachine gun, or even a high-altitude projectile,
It may cause fatal damage to the shadow dragon." Li Chai said with some embarrassment.
But Li Chai immediately continued: "Brother Shitou, although the defense of Shadow Dragon is not good, its cost is far lower than that of Steel! The cost of Shadow Dragon without weapon modules is only a little more than 10,000 yuan! And
Most of the cost is concentrated on the onboard computer, high-efficiency lithium battery, and ranging radar and camera. These components can be recycled over and over again."
Shi Lei nodded helplessly. After all, the cost was only one-tenth of the cost, and Shi Lei was not surprised by the answer. Because no matter how you look at the Shadow Dragon, it doesn't look like a high-defense machine.
The positioning of Shadow Dragon is more to perform tasks in the urban environment. Security issues in the city. Most criminals do not have firearms. Therefore, they cannot cause harm to Shadow Dragon!
In the small CNC machining center, the electromagnetic gun barrel was finally processed. Li Chai opened the door of the small CNC machining center and took off the barrel from the work clothes. With a weird smile on his face, he rubbed the section of about ten centimeters.
silvery white metal tube.
Shi Lei felt a chill in his heart. Xiao Lizi's movements were too obscene, as if he was masturbating.
"Little Plum, you guy, pay attention to your image!" Shi Lei couldn't help but remind him.
Li Guai chuckled, "Brother Shitou, don't underestimate this barrel. Although it is only 10cm long, its price is two thousand yuan!"
"So expensive?" Shi Lei looked at the ugly short tube and didn't understand why it was so expensive.
Li Chai explained: "Brother Shitou, this is a special metal that can better adapt to electromagnetic effects and allow the cannonball to reach a higher initial velocity! Just the special diamond drill bit to process it also cost 20,000 yuan!
Although it is a bit expensive, the effect should be very good!”
"Try it?" Shi Lei said expectantly.
"I'll assemble it first!" Li Chai took the 10cm electromagnetic gun barrel to the workbench, put the barrel through the latch, and installed it into the mechanical device just now.
That mechanical device is the accelerator and switch part of the electromagnetic gun. The electromagnetic gun mainly has three parts, the energy device, the accelerator and the switch.
The energy is provided by Shadow Dragon. Li Guai designed the accelerator and switch in the same part. The switch part also needs to be connected to Shadow Dragon and handed over to Shadow Dragon for automatic control.
After the barrel was installed, Li Chai took out a bag of steel balls and loaded them into the electromagnetic gun's ammunition supply system. The miniature electromagnetic gun designed by Li Chai used 5-gram solid steel balls for the projectiles.
While installing it, Li Guai introduced the basic parameters of the micro electromagnetic gun to Shi Lei. "Brother Shitou, with the energy situation of Shadow Dragon, it can only support 50 firings at most. And each firing consumes about 1 minute of power for the airborne time."
"
Shi Lei's eyebrows were squeezed together. One shot took 1 minute to stay in the air. It was really a luxurious electromagnetic gun!
"How powerful is it?"
Li Guai found a piece of draft paper on the workbench, handed it to Shi Lei and said: "The calculated data shows that the power is quite impressive. The initial speed of a solid steel ball weighing 5 grams has reached 800 meters!"
Shi Lei was not sure about the meaning of these data, so he said directly: "Xiao Lizi, please tell me the distance and how powerful the micro electromagnetic gun is!"
As the saying goes, there are specializations in the industry. Shi Lei is a super expert in the computer industry, but in the machinery industry, he has become a rookie.
Although Li Guai didn't know much about computers, he understood what Shi Lei didn't.
"Brother Shitou, according to the calculation formula of kinetic energy, E=1/2MV2, that is, the kinetic energy is equal to half of the mass multiplied by the square of the velocity. The speed of the micro electromagnetic gun is 800 meters/second, and the weight of the solid projectile is 0.005kg. The kinetic energy is
1,600 joules. This is an amazing number!" After Li Guai finished explaining, he found that Shi Lei was still confused, obviously his explanation was in vain!
Shi Lei coughed and said: "To put it bluntly, it is as powerful as something!"
Li Guai thought for a moment and then gave an example: "Brother Shitou, do you know the M4 carbine?"
In his previous life, the M4 carbine was Shi Lei's favorite. It was excellent in terms of shooting speed, accuracy, and range.
"Yes, I know!" Shi Lei nodded and asked in surprise: "Is it about the same power as an M4 carbine?"
Li Cai nodded, "Yes! The muzzle velocity of the M4 carbine is 880M/s, the kinetic energy of the muzzle is 1645 joules, and the bullet weight is slightly lighter than 5 grams. Our micro electromagnetic gun is almost the same as the carbine in terms of kinetic energy.
It’s just that the power is almost the same!”
After listening to Li Cai's explanation, Shi Lei realized his previous mistake in thinking about the power of the electromagnetic gun. It turns out that the power does not just depend on the speed, but also on the mass of the projectile and the final combined kinetic energy.
Kinetic energy is energy!
The higher the energy, the greater the destructive power and the higher the power!
There is another example that illustrates the power of the miniature electromagnetic gun, that is the famous Black Star Type 54 pistol, with a muzzle kinetic energy of only 480 joules.
After almost understanding the power of the micro electromagnetic gun, Shi Lei finally smiled. But another doubt arose in Shi Lei. Although he didn't know much about physics or the conversion of energy, Shi Lei still knew
One kilowatt hour of electricity, also known as one kilowatt hour, is equal to many, many joules.
Why does one shot of the electromagnetic gun consume one minute of Shadow Dragon's battery life?
Shi Lei asked about his doubts, and Li Guai took out more detailed parameter drawings and explained them to Shi Lei.
According to energy conversion, one kilowatt-hour, or one kilowatt hour of electricity, is equal to 3.6 million joules.
Shadow Dragon uses distributed battery energy supply, and a total of five batteries are installed, namely the four frames of the propeller and the main battery compartment of the cabin. The total capacity of the five electromagnetic batteries reaches 2.2 kilowatt hours.
Each of the four propellers has a power of 300W. The four propellers add up to 1.2kW, which consumes 1.2 kWh of electricity per hour.
Shadow Dragon also has an onboard computer, ranging radar, and surveillance cameras, which also consume power. The total power consumption is almost 500W, which is 0.5 kilowatt-hour of power per hour.
The total power consumed by Shadow Dragon in one hour is 1.7 kWh, and the total power remaining is 0.5 kWh, which can support about ten minutes of flight time.
The maximum flight range is 80 minutes, which is still quite ideal!
One electromagnetic gun only has 1,600 joules of energy. For the Shadow Dragon, which has nearly 8 million joules of energy, why does it take about 1 minute to reduce the range by firing it once?
Calculated according to the total energy divided by the total time, approximately 8 million joules of energy are divided by the flight time of approximately 80 minutes, which consumes approximately 100,000 joules per minute.
Is the difference between 100,000 joules and 1,600 joules too big?
In fact, this is not the case. Due to process limitations, material limitations, and structural limitations of the miniaturized electromagnetic gun, the energy conversion efficiency of Lorentz force and electromagnetic effects is very low!
A conversion rate of only 1.6 is not surprising!
After listening to Li Cai's explanation, Shi Lei coughed and asked: "Xiao Lizi, in a word, there is still a lot of room for improvement in the micro electromagnetic gun in the future?"
"Well! You can say that! With the improvement of the technology and craftsmanship we have mastered, better material input, and more advanced frames, our electromagnetic gun will eventually become more and more powerful!" Li Chai was confident.
Full of openings.
Shi Lei clapped his hands and said, "I'm relieved now! Little Li, put this electromagnetic gun on first. I want to test it myself to see how powerful it is!"
The process of installing the electromagnetic gun is very fast. Whether it is the electromagnetic gun or the MP7 micro submachine gun, they all adopt a modular design.
As long as it is standard modular, you only need to load it accordingly and it can be completed in a few minutes!
It took Li Guai seven or eight minutes to install the electromagnetic gun and the shadow dragon together. He also checked it once and confirmed that there was no problem before he said to Shi Lei: "Brother Shitou, there is no problem!"
Shi Lei checked the power information fed back by the ECH system and found that there was still 76% of power left, which could last for more than fifty minutes of flight.
As the shadow dragon took off, Shi Lei controlled the shadow dragon to fly out of the living room and towards the outside world.
Li Chai said nervously: "Brother Shitou, the electromagnetic gun is very powerful. What are you going to use to test its power?".
(To be continued. Please search Piaotian Literature, the novel will be better and updated faster!)
