Time flies quickly, January 20 came quietly, when Zhongwei opened the booking website, even if sufficient preparations were made, the entire website was instantly overwhelmed by visits from the entire Blue Star.

Fortunately, before the website was paralyzed, the top 1,000 lucky winners had already been produced, and after paying a deposit of 10,000 US dollars, these 1,000 lucky winners could wait for the company's shipment on January 25.

Although mr.bm repeatedly urged, Wang Yinan still did not promise to sell the second batch of somersault clouds as soon as possible, and Wang Yinan still knew the truth that scarce is expensive, so let the entire Blue Star consumers be hungry for two months.

With money or not, go home for the New Year, put the company's affairs aside, Wang Yinan boarded the high-speed train home, but after receiving a call from Chief Yang, he temporarily changed the destination to Shudu, because Yang always told him that the drone developed by the joint venture made its first flight a year ago, and as one of the major shareholders, Wang Yinan of course went to the scene to help.

The terminal of the high-speed rail is Shudu, and the cotton market will be there in half an hour, and when Wang Yinan arrived at the Shu Shixiang hot pot, Mr. Yang and the other two Wang Yinan fans have been waiting for a while.

A fan is not young, he is the program director in charge of flight control in 116, and he is also an old acquaintance with Wang Yinan, and the other fan is the daughter of Chief Teacher Yang, who has just been admitted to Shu University, and I heard that my father is very familiar with a legend like Wang Yinan, crying and shouting that he has to come over.

This kind of thinking of the new human being is completely beyond Wang Yinan's comprehension, although the age gap between the two is less than ten years, but it is as if they are people from two worlds, of course, except for the instinct of chasing stars.

The first flight was carried out the next morning, Wang Yinan had a good night's rest in the hotel next to 116, and the next morning, Chief Yang sent someone to take him to his own airport in 116.

Looking at the wall that was not very far away from the airport, Wang Yinan vaguely saw many figures on the wall, "This is the legendary wall-climbing party", Wang Yinan pointed to the wall in the distance and asked Chief Yang,

"Yes, the earliest photos of the stealth fighters were leaked out by these wall climbers," Chief Yang said helplessly.

"Then why don't you take some measures", Wang Yinan asked curiously,

"After all, we are in the Shu metropolitan area", Chief Yang pointed to the buildings outside the wall, "In order to maintain the clearance of our airport, all the surrounding buildings have limited their height, because of this, the local loss is not small, and the opinion is still very large",

"It's impossible to add a power grid or something, not to mention that even if you add a power grid to prevent climbing the wall, if you leave a little distance, you can see it very clearly from the residential buildings outside", Chief Teacher Yang said helplessly,

"So there's no way, but fortunately, you can only see a blurry shape",

"Could there be foreign spies?" , Wang Yinan asked curiously,

"Why not, last year the security department caught a professional spy of the Sun Country in the Wall Climbing Party."

The two chatted at the door of the hangar, because it was only the first flight of a model invested by themselves, so there was no celebration ceremony, all of them were 116 of their own high-level participation, and the members of the project team spontaneously played a banner on the side of "Celebrating the first flight of Xianglong UAV", Xianglong is the code name of the UAV developed by Wang Yinan and them.

The door of the hangar "Gragra" was opened, because it was driven by an electric motor with a battery as the energy source, unlike the turbofan engine, when it was on the ground, it needed an APU (auxiliary power unit) to provide the power source on the aircraft, as well as to provide the additional power needed when the turbofan engine started, so the No. 10 fighter needed a tractor on the ground to pull the aircraft out of the hangar.

And Xianglong can rely on his own strength to drive the propeller at low speed, so as to slide out of the hangar by his own energy, in Wang Yinan's expectant gaze, a slender body, black beautiful guy slid out of the hangar, the wings of this drone are very huge, the entire wingspan is about three large trucks side by side as wide.

The plane is about the length of a large truck, and the top half of the plane is covered with shiny solar panels, reflecting bursts of golden light in the early morning sun.

Under the drone, there is a semi-circular instrument compartment, the huge instrument compartment is open, and a camera is placed in it, "That place is the place where the transponder will be put in the future", Chief Master Yang said to Wang Yinan,

"Now put a panoramic camera and counterweights",

The landing gear of the aircraft is very high, and the front propeller is very large, "Originally, we had an engine on the left and right sides of the wings".

"But later during the test, it was found that one electric motor was enough to drive such a large propeller and provide enough power for the aircraft."

"So we urgently modified the plan and put the engine in the nose, so that the overall battery capacity and payload have also increased a lot," said Chief Yang proudly.

"What are you doing, it's not my engine that is powerful", the two of them had a lifelong friendship, and Wang Yinan began to hit him without hesitation.

When the two were arguing, Xianglong quickly slid to the starting point of the runway, and the on-site commander, who was also the person in charge of the project, ran over, "The Xianglong 001 prototype has completed preparations for its first flight, and the data are normal, please instruct the chief",

Chief Master Yang nodded, "You are fully responsible for the scene, and Professor Wang and I are here to see the excitement."

The commander-in-chief turned on the walkie-talkie and said to the tower, "Tower, tower, Xianglong 001 requests to take off",

"Take-off is allowed", the tower's answer is also very simple,

Xianglong is like a pair of electric supercars, starting from the starting point of the runway to accelerate, less than two hundred meters, the supercritical wing in the aircraft speed just reached two hundred kilometers per hour, it produced enough lift, as soon as the drone raised its head, the landing gear left the ground, the plane for a propeller aircraft, the incredible elevation angle straight into the blue sky.

"Let's go, let's go to the control room", Chief Yang took Wang Yinan to the UAV control center, 116 is professional in this regard, the real-time picture captured by the camera is transmitted through the satellite, and will be sent to the control center in real time, of course, compared to the effect that the stratosphere prowler will achieve, the delay must be much larger.

On the large screen in the control center, you can see that the runway and tower on the ground are rapidly getting smaller, and after a while, they will be invisible. There were all kinds of clouds on the screen, and five minutes later, the drone flew above the clouds, and the beautiful sea of clouds and the blue sky formed a beautiful scenery.

"Now the altitude is 12,000 kilometers, and the engine speed is xxx per second", the on-site commander began to broadcast,

"The design goal of the first flight has been reached, waiting for further instructions", the on-site staff looked at Chief Yang, obviously, everyone thinks that the drone still has a lot of margin, is it for us to rush again?

"Are the solar panels working properly, and are they driving the electric motor and charging the battery at the same time?" , Chief Teacher Yang asked,

"Yes, the current data seems to have a surplus of power",

"Then fly up again", Chief Yang finally made a decision, after all, our working altitude should be about 20,000 meters, where the air is thinner, the requirements for engine speed are higher, and the power consumption is higher.

"Start the spiral climb at an angle of climb of 5 degrees", the on-site command gave the command, and the engine speed began to rise steadily, and it can be seen on the big screen that the clouds below are getting farther and farther away.

At the beginning, there were bursts of extremely high thin clouds in the air from time to time, and as the drone flew higher and higher, the sky became bluer and bluer, the air became clearer and clearer, and the clouds disappeared completely, "16,000 meters",

"17,000 Kilometers",

"Eighteen thousand meters", as the altitude became higher and higher, the atmosphere in the control room began to become tense, after all, no propeller aircraft had ever been able to fly to such a high place before.

Wang Yinan also held his breath, only if the drone can fly stably at an altitude of 20,000 meters, he can convince those who question the Stratoprowler plan, after all, no normal civil aviation or even military aircraft will fly to an altitude of 20,000 meters.

"Nineteen thousand kilometers", looking at the camera, the speed of the aircraft propeller has increased significantly, and the speed of the aircraft has begun to increase gradually, because only a faster speed can generate enough lift in the thin air.

"20,000 meters", as the staff broadcast loudly, applause came from the control room, first Wang Yinan, then Chief Yang Shi, and then, slowly in the entire control room, applause continued to sound.

"Report the power supply data of solar panels, as well as engine power consumption data", Chief Engineer Yang is a person who has seen a big scene, and this key data directly determines whether the drone can achieve a long-term endurance.

"The solar battery power supply is normal, and it is slightly higher than when the altitude is 12,000 kilometers", the staff began to report.

"But", the staff member's voice was quiet, and he didn't spit out a word for a long time,

"But what?" , Wang Yinan had a bad premonition, he walked over and asked,

"It's okay, as long as the plane doesn't fall, it's not a big deal."

"The power consumption is a bit high, the speed of the drone exceeds our estimate, and the speed of the electric motor also exceeds our estimate", said the staff,

"What does this mean?" , Wang Yinan actually had a vague answer in his heart, but he still asked,

"We don't have enough extra power to charge the battery, which means that the energy in the battery will be consumed at night, at the current rate", the staff member looked at the data on the display, swallowed, and said loudly,

"Four hours after the sun sets, the drone's batteries will all be depleted."

"Okay, I know that I am definitely not God's illegitimate son", Wang Yinan has words in his mouth, people say that happiness is sad, this year seems to be too smooth, even the gods can't stand it, and they don't want people to have a good New Year, which means that the long-term drone communication network is not feasible at least in the current situation.

Chief Yang is also a little blind, and it seems that this situation has exceeded his expectations.

"It's okay", Wang Yinan turned around and comforted him,

"Being able to fly to an altitude of 20,000 meters without any problems is already a huge success, isn't it just that the power of the solar cells is not enough, this is a small problem, it is easy to solve."

Chief Master Yang nodded, and he said loudly, "In general, the first flight of the Xianglong was a complete success".

"For the first time, we have achieved the cruising of a propeller aircraft at an altitude of 20,000 meters, which is the first time in the history of aviation.

Of course, Chief Engineer Yang also knows that Wang Yinan's words are purely comforting, can not be taken seriously, the problem of solar cell power, is not a small problem, is a big problem, a big problem, you know, how many years of human research on solar cells, a percentage point increase in conversion efficiency, will be considered a huge technological progress.

What's more, the power gap between the solar panels of the Xianglong is not as simple as one point and two points.

Although the first flight left a huge shadow, according to the customs of the Chinese people, the big thing, after the New Year, Wang Yinan borrowed a Jeep or two, and drove straight to the cotton market.

In the blink of an eye, it's another year.