Since the Industrial Revolution, humans have built complex machines from metal parts, and the complexity of the machinery depends on the strength of the material and the energy density of the fuel. Theoretically, the use of enriched uranium, an energy substance with a very high energy density, can support the existence of an aerospace carrier. However, the strength of no material can support the safe export of intense nuclear energy, so the high power of a small mass nuclear engine can never be built.

Of course, there is no material of any strength to support the flight of a huge aerospace battleship, and even if such a metal structure is built on the ground, it will make a creaking sound of metal parts rubbing against each other in the simulated earthquake shaking of magnitude seven or eight.

Although metal parts are extremely strong, they are still not absolutely rigid. Hundreds of meters long, millions of metal parts, and the small deformations that are superimposed are enough to cause huge gaps in the tightly knit parts to be twisted.

On the roof, Lu An looked at this paper creation built by his own hands, a total of 20 kilograms of paper, the body is three meters long, 1.5 meters wide, and 30 centimeters thick. Even if it is not attached to the superpower, the paper structure can support its internal stability, and of course it is expected to collapse after sprinkling water, so in order to prevent this from happening, the waterproof paper covered with plastic film used by Luan is used.

In the rehearsal, Lu An himself complained about the floating battleship that took six hours of his real time and was made up of a total of 270,000 paper parts.

"The Flying Coffin? Or is it a "white flag"? Well, let's call it a kite," Lu An naturally gave his spliced floating battleship a realistic name.

A certain mood named it the Flying Coffin because the body of this thing is the same size as the coffin, and the other rehearsal is called the White Flag because this thing is a white flag when it is on standby in the sky. In the end, it was decided to call it a kite because the battleship itself still had to dock a bamboo-framed wing, and the entire wings spread out to 15 meters, which was put into the air with a rope twisted from glass wire in the way of flying a kite, and then stood by.

The entire Kite is usually on standby high in the air. There is no need to bother, because the turbofan parts covered by the internal conductive membrane will rotate quickly with the wind at high altitude to drive the hinge, and the whole kite will collect kinetic energy at all times, and the outer wind vane on the kite and the gyroscope inside the kite will automatically adjust the attitude. Floating directly in the sky. This is the only way to float in the sky for long periods of time without the buoyancy of hydrogen.

Usually Lu An is ready to let this thing float in the sky, and when necessary, it will be used to let it break away from the flying wings and float in the sky, this system called the kite carries about a kilogram of ammunition, and the ammunition is a candle (melted and finalized) match head and a thumb-sized jujube bullet structure made of match rubber. It can be accelerated to 400 meters, and the paraffin wax is still relatively hard at low temperatures. So the kinetic lethality is considerable. The fire point caused by the impact can cause additional damage to the target, and if there is a large amount of combustible material accumulated near the target, the destructive power of this type of projectile is still very high. A total of three hundred projectiles, the striking power is very impressive.

The whole Kite, after breaking away from the flying wing, needs Lu An's active control to maintain a stable flight attitude, stable floating in the air, and can stay in the air for four hours if it is not controlled.

If it is not controlled, it is impossible to effectively collect air kinetic energy at high altitude, and it can remain in the air in place within four hours by relying on the autonomous adjustment of the attitude of the battleship by relying on the weather vane of the battleship. It's just that this mechanical system is judged by the weather vane, there is a lag, and it will continue to circle in the sky. until the kinetic energy of the internal superflow ring is exhausted.

Although it took only six hours to fabricate, the sheer number of parts and the techniques used to assemble them were the result of six months of continuous experimentation, and the process of the experiment was carried out in a six-minute rehearsal. From an outsider's point of view, Lu An was constantly flying this strange big kite. Due to the fact that during the actual flight, Luan did not activate the state of the Kite after it broke away from the wing.

Looking at the kite flying in the sky, Lu An paused: "This thing is good, but it's still too big, and you can only put three of this thing in the bed cabinet when you return to the main world." "It's actually very small, absolutely unaware by military standards. If you want the regular military to know that Lu An can make this thing, it must be closely monitored, because this thing carries ten kilograms of explosives to play kamikaze, and its destructive power is about the same as that of cruise # missiles.

Generally speaking, this thing is made of paper shells, and according to the government's military use, the cost is close to zero, and the total cost of Lu An's manufacturing is only forty yuan, and the money to buy paper is only. Of course, forty yuan is considered a lunch box for Lu An, and it is quite distressing to make arms like this.

Lu An calculated his consumption in the next year in the main world, and found that he would consume 60,000 yuan a year for food and tuition. In order not to let yourself spend too much on this interest outside of life. Then, according to the country's military spending standard in peacetime, Luan was three percent of GDP. Therefore, Lu An also set a standard standard for himself in the Overworld, and the cost of this thing should not exceed 1,800 yuan a year.

In fact, in the Overworld, even if Lu An has millions of cash, Ji Liu will call him as promised. But once Lu An asks for so much money, Ji Liu will definitely strictly investigate what he used the money for. As for the issue of military spending, Lu An felt that in the future, he could take some waste newspapers from the school that no one wanted to solve the problem of his own manufacturing materials. As long as it's paper, it's fine. (Lu An now treats paper as if the country were focusing on steel production)

With enough paper, Luan was able to manufacture even the mechanical structure of automatic origami, automatic machines for cutting paper. It is capable of mass-producing enough flight equipment to control the entire city of Pudong in one day. Through plagiarism and his own modifications, Luan has accumulated enough manufacturing knowledge. If in full swing in the Overworld, it would be a hopeless productivity in anyone's eyes.

Of course, even with such an ability, Lu An's deep-rooted nature is still trying to hide this ability as much as possible, in Lu An's experience, well, this kind of experience is the "experience" developed by watching anime before World War III, how many powerful villains in the anime are too confident in their powerful abilities, and they were finally killed by the plot.

There is no useless superpower, and there is no invincible superpower, once the superpower is inexplicably restrained by his opponent, what awaits him may be the end of the street rat.

Lu An's creed - there are no too many abilities and means, and if they are used indiscriminately before they are in danger, they will be exhausted. After the floating battleship flies into the sky in the form of a kite. Luan looked at the Kite as it hovered steadily on its wings.

Luan walked into the room, where there were a large number of models, of course, to outsiders, these models without an unobstructed membrane were just paper models. Lu Anzai walked straight to a cabinet and hugged a thigh-thick three medicine cartridges.

Butt it a little and wrap it in scotch tape. A two-meter-high rocket was formed, and a mobile phone was placed in the tip of the rocket.

With a burst of sparks, this huge firework rose into the air, and the Sky Monkey, because it was covered by Luan, rose extremely fast, and soon flew into the distance.

Lu An opened his mobile phone and checked the positioning system on the phone, only to see that the positioning system showed that the target was moving at high speed. Of course, this kind of display is very unreliable, when the aircraft flies away from the position covered by the signal base station, it will not be able to obtain the positioning information. Therefore, this rocket is zigzag in the sky, from one city to another, using the signal base station in the city to position. Lu An, who stayed at the launch site, tried to adjust the direction of the rocket to the right angle.

Four hours later, in Jinrui, the fireball that disintegrated in the sky above the golf course that Li Sanxiang was looking at, (the speed decreased sharply after the unobstructed membrane was revoked.) After the fireball dissipated, four parachutes were opened at an altitude of 3,000 meters, and the landing objects of the three parachutes collapsed due to the speed. Li Sanxiang couldn't help scolding: "Damn, it's convenient for you to send information like this." ”

After speaking, Li Sanxiang immediately drove the vehicle towards the falling target four kilometers away, and the mobile phone positioning showed that the courier sent fell here.

This is how Lu An delivers the express, and the positioning system of the mobile phone lets Lu An know the general route of the rocket. Then control the probability of the unobstructed membrane change so that the rocket moving in the air in a zero-resistance state completes the orbit adjustment. When transporting this express, in order to ensure that the transportation capacity is sufficient, Lu An specially used three rockets to complete the transmission, of course, the most difficult is the atmospheric return step. After the phone's target showed that he had reached his destination, Lu An activated the thrust reverser mechanism in an attempt to reduce the speed of the moving target.

If this system does not have any supernatural involvement, it will still return to the deceleration time and space to continue to fall to check the air flow. All require a lot of equipment simulation. The material of the rocket launch shell must not be so sloppy, and it must be made of special materials. Some even have to use hypersonic wind tunnels. If any of the air currents are not calculated, the resulting drag can cause the aircraft to rotate hundreds of times. It didn't even have time to crash, and it was directly destroyed by the centrifugal movement generated by the rotation.

This involves operations on a few digits after the decimal point, which can be omitted by the impediment. Because the influence of the turbulent air flow does not need to be considered, the projectile is successfully decelerated in the final continuous reverse jet in the process of rotation, and the falling warhead is only affected by the force of the bottom thrust reverser in the whole process. So there's no complicated calculations.

The entire rocket launch experiment Lu An destroyed forty smart phones, and finally in the last thirteen tests, after discovering the process after the fall, dialed the mobile phone to prompt a busy signal waiting to be answered, (can get through, it means that the mobile phone has not been destroyed) Lu An announced that he has mastered the technology of sending couriers.

Of course, this was only Lu An's own declaration of control, in fact, Lu An had never seen the situation of the fall site on the ground. How much does the landing point shift, and will the police and military run over to block the scene during the fall. Lu Ann didn't know.

However, forty minutes later, Li Sanxiang pried open the box and picked up the mobile phone and hard disk sent by Lu An, and the first thing was to open Yuanyi Communication, and said to Lu An: "Don't engage in this kind of transportation in the future, half of my city here has been alarmed by you." ”