With the rapid rotation of the propeller, the drone slowly rose from the grass, flew to an altitude of about ten meters, and stopped there.
Li Yu held the remote control in his hand and pushed the joystick lightly to test whether the aircraft's lifting and horizontal displacement functions were normal.
The signal transmission function between the drone and the remote control does not rely on the Internet, but is realized through its own antenna. In cities, due to a large amount of electromagnetic interference and environmental obstruction, the effective transmission distance will be greatly shortened.
Taking the DJI Mini 3 Pro in Li Yu’s hands as an example, the official flight distance for strong interference under FCC standards is about 1.5 to 3 kilometers.
In the outer suburbs and the seaside, this distance is increased to 7 to 12 kilometers.
As for the green field, there is no WiFi, Bluetooth or other signals competing with the drone for bandwidth, making it a perfect flying environment.
Of course, there are also shortcomings. Without the assistance of GPS, it is difficult for the drone to hover accurately, and functions such as route planning cannot be used, which greatly increases the risk of bombing.
However, Li Yu had no choice now. He turned off the obstacle avoidance function of the drone, raised the drone another hundred meters to ensure that it would not be easily discovered by people below, and then controlled it to fly towards the castle.
go.
At night, the pleasant evening breeze that blows from time to time causes the drone to sway and drift in the air. At such times, Li Yu also uses a stick to correct the direction of the drone's movement.
Fortunately, even if the visual system is difficult to locate due to the surrounding dark environment, and the GPS is lost, the aircraft will still provide a basic attitude mode to help stabilize the body, greatly reducing the risk of crashing.
In the end, Li Yu controlled the drone and successfully crossed the high wall of Teacup Castle without disturbing the troops outside the city. The people in the castle knew nothing about the arrival of this uninvited guest.
Even if someone accidentally raised his head, he would probably only think that it was a strange bird flying from high in the sky.
Li Yu used the real-time images transmitted from the camera to view the guards on the city wall in sequence.
Miss Rabbit was also by his side, responsible for identifying Alfred among them.
As Li Yu adjusted the zoom camera equipped on the drone, faces were zoomed in and out. Ilea, who was watching on the sidelines, repeatedly exclaimed.
But Miss Rabbit is already feeling a little numb now.
Tonight, Li Yu first helped her awaken the ancient spirit sleeping in the necklace, and then summoned a metal divine bird to fly to the sky and escape from the earth. He also used the eyes of the divine bird to see everything around her.
The girl was in shock almost all the time. Even if Li Yu suddenly yelled, "Go away, my grandson", then stepped on the auspicious clouds and somersaulted thousands of miles, I guess Miss Rabbit would not be too surprised.
.
The most they can do is shout from below, Great Sage, please quickly collect your magical powers!
The half face not far away was no better than hers. When the drone took off, Jude seemed to be out of body along with him.
He stood there staring at the small black dot in the sky, motionless.
It was like a human cub seeing an excavator working for the first time. It couldn't look away at all and kept muttering nonsense like, "There must be a soul in that! Yes, there must be a soul!!!".
Li Yu controlled the drone and circled around the castle, but could not find any trace of the old knight.
Ilea volunteered and offered to lead the way into the stone castle, but Li Yu gave up the idea after thinking about it.
After entering the stone castle, due to the obstruction of those thick stone walls, the signal will definitely become worse, and the risk of bombing the drone will also increase. In addition, in the cramped and narrow space, it will be difficult to avoid the drone if there is an accident.
So in the end, Li Yu chose to push the joystick and order the drone to descend in front of a soldier.
When it reached an altitude of almost twenty meters, the noise from the four pairs of propellers woke up the napping soldier.
He rubbed his eyes, looked in the direction of the sound, and then stayed blank.
In order to allow him to see the appearance of the aircraft better, Li Yu controlled the drone to descend some altitude.
As a result, the guy screamed, threw the spear and shield in his hand to the ground, decisively left work early, and ran away to no one knows where.
Li Yu had no choice but to let the aircraft find another soldier on the city wall.
This man became a lot more courageous, and even drew out his weapon and waved it around, as if trying to scare away the little thing in the sky that had no wings but could fly.
Li Yu was also forced to admire his fighting skills for a while.
Fortunately, when he realized that his attack range was probably out of reach of the drone, he finally made the right choice. While being careful, he called a companion to notify the people in the stone castle.
Just when Li Yu relaxed his vigilance, an arrow flew out of nowhere and headed straight for the drone in the sky!
Caught off guard, Li Yu had no time to make any operations. In the end, a gust of evening wind happened to save him. The drone was blown a short distance by the evening wind.
But he accidentally avoided this fatal arrow.
Li Yu did not hesitate, immediately raised the height of the drone, and continued to move irregularly in the air, so the next few arrows failed to pose any threat to the drone.
After waiting for a while, an old man who looked to be about fifty or sixty years old wearing armor came out of the castle and climbed onto the stone wall.
He squinted his eyes and carefully looked at the thing in the sky.
Li Yu was also observing him through the drone's camera.
The visitor was tall and muscular, with resolute eyes. Although there were wrinkles on his face, he did not look aged. His silver hair was meticulously taken care of, and the armor on his body was also wiped clean.
But unlike the gorgeous items used by many great nobles to set off their heroic looks, that armor is obviously old. If you look closely, there are many pits in it, faithfully recording the previous scenes for its owner.
Fighting fiercely, the rabbit emblem on his right arm shows the family he is loyal to.
He also held a yew longbow in his hand, nearly two meters long.
Taking a war arrow from the attendant beside him, the old knight bent his bow and nocked an arrow. The long and narrow dagger-shaped arrow glowed coldly in the night.
But in the end he didn't shoot the arrow.
After putting down the longbow in his hand again, he gestured to the archers around him, asking them to also put down their weapons.
Those people looked at each other and finally followed the orders.
Li Yu also turned to look at Ilea, and the girl nodded to him, "That person is Alfred, my guardian knight."
Hearing this, Li Yu controlled DJI Mini 3 Pro and dropped downwards carrying the ruby hanging below and Ilea's handwritten letter.
This chapter has been completed!