Thanks to the dragon VS carnage、Little white elder、Blue moon ぁ Demon Dragon's monthly pass——

"All the work must be done without alarming the fire dragon." Technophilia has always killed dogs with curiosity.

"Why?" Tanya asked.

"Because it is alarmed, the dragon will fly."

"Can't lightning even hit a dragon in the air? I can shoot any arrows. Tanya's face was full of disbelief.

Can you still expect a girl who has played with dragons since she was a child to learn junior high school objects on her own?

Wu Chen was speechless: "Because it's not grounded!" ”

"Hey, you're so strange, you're flying, how can you be grounded?"

Sure that it is not cute, Wu Chen took a deep breath, and then said to the leaders of the stations along the line with a pleasant face: "Everyone has seen that the bottom of Line 5 is full of coils, and in order to prevent accidents, personnel must be transferred as much as possible." ”

"Your Excellency, are you sure this device can kill dragons?" Many people are more skeptical than in awe of black technology.

"Sure." Wu Chen nodded solemnly.

"But there are many stations in the central area surrounded by Line 5, and if they all add up, where can we move to? Is there a safety line? ”

Wu Chen only thought of a very important question at this time: referring to the doctor's design drawing, no matter how long the lightning is, it is impossible to wrap the whole of Moscow!

"Theoretically, the potential difference between the top of the discharge and the ground is infinite, but in fact the length of the arc will not be infinite, it is limited by the power of the power supply, and the calculation method is: arc length (cm) = 4.318 × P (electric power, in watts), provided that the primary and secondary frequencies are equal, to achieve the state of 'resonance', at this time the arc length will reach the longest and the highest efficiency. If there is no resonance, the arc length will not be able to reach the result calculated by the formula......" Thinking of this, Wu Chen suddenly spoke, "Doctor, the power of the nuclear reactor you power the magnetic storm coil ......"

“900MW。”

"900 megawatts!" That's 900000000w! The open root number is equal to 30000! Multiplied by 4.318 equals 129,540 centimeters, 1,295.4 meters!

"Alternating currents above 2000V can break through the air, because we usually connect to 220V civil electricity, so we need to use a step-up transformer to rise to 2000V to activate lightning. The doctor is directly connected to the nuclear reactor, and the voltage is far more than 2000V, so there is no need to boost the voltage......" Wu Chen suddenly woke up, "Doctor, you asked us not to evacuate, but to have a bloody battle!" ”

"That's right, use enough 'food' to attract the entire group of dragons to a dome within a radius of 600 meters from the Telegraph Building." The doctor clenched into a fist.

I'll go!

"But why lay such a long underground cable?" The length of the main coil obviously has nothing to do with the length of the arc, which is something that Wu Chen can't understand.

"In layman's terms, power is directly proportional to the thickness of the cable. The higher the power, the thicker the cable will be. Otherwise, the copper core will be hot, first burn the insulation layer, and then the copper core will be fused. The cable under the Moscow metro is, of course, also a copper core. Fortunately, we also know that there is a 'heat transfer' effect. ”

"The phenomenon of heat transfer from one part of a system to another or from one system to another." Wu Chen understood, "The doctor wants to exchange length for time. ”

The reason is very simple, if the melting point of copper is 1000°C, because of the heat conduction effect, the time for a 1-meter-long copper wire to reach the melting point must be different from that for a 1000-meter copper wire.

"Well, doctor, you estimate ......"

"100 seconds."

Can you last a hundred seconds? Wu Chen expressed his skepticism!

"Underground cables are the weakest part, like extra-long fuses, and they must be the first to blow." The doctor cheered Wu Chen up.

But the technosaurus who didn't just think with his lower body was not moved at all: "Doctor, what if the wyvern will definitely fly in the air when hunting, and it won't touch the ground?" ”

The Doctor laughed, "Great Sag, do you think that lightning is the spear of Zeus, which is thrown from the clouds to pierce the Wyvern?" No, my friend, lightning is just our lovely lighter! ”

"Fighting, fire, machine?" Wu Chen was completely messy.

"You must not have noticed, when the dragon breathes fire, it will first spew two streams of venom from the gland into the air, and then blow hard! So, if you set the venom on fire before it leaves the dragon's mouth, the dragon's head will turn into a big bomb and blow itself up into the sky! The Doctor's eyes were blood-red.

In other words, is it just to study how to breathe fire, so he was complained about by the fire dragon in person......

Normally, objects flying in the air without touching the ground are rarely struck by lightning.

However, there are exceptions. For example, Wu Chen's white swan.

Because the aircraft is a metal body with static electricity, and the electric charge is mostly concentrated at the tip and edge of the aircraft, the nose, the trailing edge of the wings and tail, and the tips of various radar antennas are the most vulnerable to lightning strikes. Of course, the aircraft has been designed with lightning strikes in mind, and the wings and fuselage are equipped with electrostatic dischargers, which can discharge the static electricity accumulated on the surface of the aircraft into the atmosphere, so as not to attract lightning from the charged gathered by the fuselage!

With the size of a fire dragon comparable to that of an airplane, and without an electrostatic discharger, it is ironclad to be hit in a dense man-made electric field.

"Hey, old fellow, can you make sure the lightning doesn't hit us?" Mares asked, squinting. Although the bear knows nothing about these black technologies, it has a keen intuition that is almost like a beast. He clearly smelled the crisis!

"I've got some equalizers here. If that's not enough, we can also make some simple Faraday cages......" He didn't explain, but everyone started to doubt as soon as he opened his mouth. What do you mean by 'some' and what do you mean by 'easy'?! Is your mom really your dad's? I'll wipe it and go!

"I'll do it." Wu Chen didn't open his mouth again, it was really an insult to his technical nerd IQ.

"My white swan can attract the attention of the dragons." As long as the male dragon is killed with one shot or something, the hatred value will explode in an instant.

Staring at Wu Chen's uncertain but unrepentant expression, a trace of fluctuation suddenly flashed in Dr. Skola's eyes, "Thank you." ”

Let a crazy old scientist sincerely say thank you with an incomparably clear gaze, and Wu Chen can be content.

Until then, there is still some preparation to be done.

Returning to the subway station from the underground fortress of the Central Telegraph Office, Wu Chen boarded the White Swan for the first time.

Gloria, who had been pondering on the road, finally had a final judgment: "30 seconds." ”

"It's only 30 seconds...... Dr. Skula's estimate is still too optimistic.

Or shorter. With human technology, the possibility of defects in copper core wire is extremely high. It is impossible to be as optimistic as the doctor expected. ”

Gloria was right, there must be flaws. Otherwise, there would be no 'defective rate' in human industrial creations.

"What are we going to do?" Wu Chen thought for a while.

"Apply an electrostatic shield to the white swan." T160 and Gloria spoke in unison.

The outer shell of a conductor 'protects' its interior, making it immune to external electric fields, a phenomenon known as electrostatic shielding.

The so-called equipotential equalizing suit is made of metal wire by using electrostatic shielding characteristics, and it is necessary to wear safety protective clothing when working with live and high voltage. Faraday cages are metal cages made on a similar principle. Not to mention the materials needed to make these armors, how can you fight the fire dragon in these bulky equipment that is wrapped from head to toe?

So in the original plan of the doctor, the death of some people was the price that had to be paid. That's why he used the word 'food'.

If Wu Chen hadn't been there, the doctor would never have told the whole plan. And in order to sell his crazy plan as much as possible, he will do everything possible to cover up the part that 'must be sacrificed'.

In other words, it was actually because of Wu Chen's arrival that he had a better choice, that's all.

was complained about by the fire dragon like that bear, relying on batteries and nutrient solutions to continue his life every day, and only he knew what his heart was tortured into. Wu Chen wouldn't expect him to be a little friend who could still play together.

Wu Chen is actually not very worried that the white swan will leak electricity, because in order to cope with various emergencies, Gloria has carried out a systematic cybertron-style transformation and upgrade of the white swan. Among them, in order to cope with the attack of thermal weapons such as death light, a "Cybertron capacitor" was added to the core circuit. These supercapacitors, which were originally installed on the Transformers to protect the core components from burning circuits due to energy overflow overloads, are more than enough to cope with some lightning.

Wu Chen was more worried about the destruction of the white swans by more than two thousand flying dragons. Losing the advantage of altitude and distance, fighting with the army of dragons at low altitudes near the ground, even if the shell of the white swan is super hard, small wounds such as scratches on the paint surface are inevitable. In doomsday mode, it is really harder to find a place to repair it than to ascend to the sky.

However, things still have to be done.

The otaku savior plot with cheap hands and a soft heart and a sense of justice is one of them. What's more, being able to witness this super artificial lightning with your own eyes is a dream experience for tech nerds. If there are turtles who use speeches instead of sex, this super tech show is a gluttonous feast that can satisfy the unique tastes of tech nerds.

Therefore, Wu Chen is quite looking forward to this man-made miracle that is about to happen.

To be on the safe side, Ivan and others still 'convinced' all the underground remnants within 1,500 meters of the subway line to move to a safe area.

Everything. With the first rays of sunlight piercing through the darkness, the white swans spewed surging snowflakes and soared.

On the top floor of the Hilton, Tanya, who was holding a dragon egg and eating Haisai, smiled and waved at the cockpit of the white swan shaking off the snow like a waterfall.

Wu Chen nodded helplessly in response, this guy still killed the female dragon named Natasha. Isn't she ...... Replace sex with dragon slaying.

"All-target search, looking for pheromones for male dragons." The white swan quickly disappeared, and Wu Chen activated the quantum weak magnetic resonance radar.

"Found it." The target with the biggest pheromone difference from the female dragon is obviously the male dragon that is the most hidden in the dragon's nest. The T160 quickly locks onto the target. Based on the powerful number jù operation of quantization, the body of the male dragon on the holographic platform was quickly modeled.

Sure enough, compared to the average female dragon, the male dragon who coiled himself into a ball was not only larger, more, and darker in scales, but as he breathed, Wu Chen also saw a huge grape bunch heart composed of 32 sarcomas. The white swan approached silently, and the male dragon seemed to sense the crisis and suddenly opened his eyes.

The T160 immediately hovered off the plane, and everyone held their breath. Fortunately, after a brief stalemate, the male dragon slowly closed his eyes again. R1152