Li Siye tugged on the shallow beard on his chin and said calmly: "You don't have to worry about the drum car, I have my own method for this." ”

Feng Changqing nodded suspiciously, thinking that General Li was talking big, no one had ever seen the drum car except for the imperial city and palace eunuchs, and the magic of creation was more like a skillful workmanship, and it was not something that Zhang Heng Ma Jun and others could not do, and ordinary people could not deduce the structure at all, let alone create another one.

He put the white silk behind his back and bowed to Li Siye: "If the general has nothing else to do, his subordinates will go down first, and I will first use the ink fountain to make a check." ”

Li Siye waved his hand at him and let him turn away, while he began to bow his head and ponder.

The Jili drum car was invented in the Eastern Han Dynasty, which is equivalent to the odometer of modern automobiles, and the wheel rotation is not as complex as that of clocks and clocks through the differential principle of gear transmission, but it is 1,700 years ahead of the West. Legend has it that it was invented by Zhang Heng, but it is not explicitly recorded. Its function is actually to be used as the Son of Heaven's car Yuluan driving, also known as the big chapter car, when traveling after the guide car.

Legend has it that the Yellow Emperor invented the guide car, since the beginning of the Zhou Dynasty, the Son of Heaven traveled to the guide car as the guide, the Eastern Han Dynasty joined the Jili drum car, there is a car in the car and the historian is responsible for recording the living notes of the Son of Heaven, the reason why later people read the history books say that the Son of Heaven traveled on a certain year, a certain month, and a certain day, and how many miles to the east, and arrived at a certain place. The mileage in this is not estimated, but accurately measured by the drum car.

It is no wonder that the ancients would call the map a map, which is still inseparable from the emperor's chariot.

Li Siye silently calculated, Tang Li is measured by Li Shimin's two steps, one step is equal to five Tang feet, and one mile is three hundred steps. According to this, the wheel of the drum car is made with a diameter of one step and the pi is adjusted to a little more than three steps, so that every hundred revolutions of the wheel is one mile. Install wooden gears on the axle, and the circumference of the big wheel is ten times that of the small wheel, and then install another wheel on the side shaft, still adjusting the speed multiple, until the wheel turns a hundred times, and the top gear turns once.

This is just the completion of the basic structure, the next step is to install a drum device, the gear is equipped with a pluck ring with a bowstring structure, so that the villain's drumstick is pressed on the drum surface, and the gear beats the drum every time it turns. Of course, that's not all, there is another device on top, and when the drum beats ten times, the cymbals on the top layer will make a crisp sound.

The drum car made in this way is far more accurate than measuring with feet, although it still can't solve the problem of the curvature of the earth, as well as the slope of the altitude, but it is already very powerful. From the beginning of the Jin Dynasty to the Ming and Qing dynasties, the maps of the dynasties were drawn according to this method and theory.

He returned to the main hall, lit the oil lamp, sat down in front of the desk, took out a thin pen, wrote and drew on the paper, and kept calculating, spending dozens of ephedra papers before sketching the overall structure of the vehicle and the drawings of other parts, and sketching the dimensions.

When he stretched his waist and stood up, he didn't realize that it was already afternoon, but he didn't feel tired at all, and he just wanted to get the real thing out as soon as possible.

Twelve Niang entered the hall and saw a ball of waste paper on the ground, so she couldn't help but look at him sadly, and lowered her body to pick up the paper.

Li Siye walked quickly to the door, and Yan Xiaosi was leading his own soldiers to clear weeds in the yard and repair some dilapidated places.

"Little four."

"It's coming, it's coming, it's coming."

Yan Xiaosi ran over quickly, stood at the foot of the steps and asked, "Don't do hygiene, this place can be lived, you take a few people to the city, and call everyone who knows carpenter's skills to the town envoy's mansion."

When the twelve mothers who were in the house heard this, they couldn't help but be overjoyed, Li Lang was going to prepare to make furniture for the cave room, but there was nothing to do, just to make a wooden couch, two hu beds, makeup, and then find a craftsman to grind a bronze mirror, there was no need to spend so much time.

Yan Xiaosi looked up at the sky, scratched his head and said in embarrassment: "Call them all now, and when everyone is gathered together, it will be dark."

"You're right, then go and notify them today, and let them come to work tomorrow."

Yan Xiaosi immediately crossed his hands: "Well, I'll take someone personally."

……

The Governor's Mansion is located on higher ground in the south of the city, and there is a two-story Persian arched building in the backyard of the palace, with a flat-roofed house next to it. At this moment, Pei Guoliang, the governor of Shule, was sitting on the roof of the Hu bed to enjoy the coolness, and the two maids with Han makeup beside him were gently shaking the fans.

Pei Guoliang sat on the roof, except for the city tower as tall as him and the Shule Town Embassy, most of the houses in the city were in full view.

At this moment, he looked around and saw that there were two teams of soldiers in the city who were inquiring and searching one by one, which was not unusual, and he didn't know what they were doing.

Pei Guoliang is the royal family of Shule, and his father Pei Anding was named the king of Shule by Xuanzong in the early years of the Kaiyuan Dynasty, and concurrently served as the governor of Shule and the Sima of Yaojianzhou. His father died of illness three years ago, and he inherited the throne of Governor and Sima before the age of 20, but this King Shule is not hereditary, and he can only be crowned by the emperor again if he makes meritorious contributions under the care and blessing of the imperial court.

Based on this wish, he was very concerned about Shule Town, which was sent by the imperial court to Qiuzi, after all, he was an empty title and had no real power, and only the two thousand barracks formed by the local Hu people belonged to him, and his combat effectiveness was also many grades worse than that of the Tang army. Therefore, I very much hope that the new envoy is an ambitious and capable person who can take him to upgrade and take off, just like Zhao Yizhen, the deputy capital protector of the sixteenth year of Kaiyuan, and united his father to defeat Tubo, so that his father could be crowned the king of Shule.

He felt something, raised his head and instructed the maid beside him: "Go, go down to the courtyard to summon a slave, and inquire what these Tang soldiers are looking for in the city?"

The maidservant groaned, turned and entered the arched house, and stepped down the wooden staircase. He casually called a Persian servant dressed in white to come over, whispered a few words beside him, and hurriedly sent away.

After a while, the servant returned, and bit his ear beside the servant girl, the servant girl nodded, turned around and stepped on the wooden stairs back to the roof, squatted beside the master and whispered: "Ah Lang, these Tang soldiers were sent by the new town envoy to search for carpenters everywhere in the city."

"Looking for a carpenter?" Pei Guoliang raised his eyebrows and asked, "What is this Li Siye doing everywhere looking for carpenters?"

"How do slaves know?"

"I see." He pondered for a while before he said to himself: "When I welcomed him into the city this morning, my wife also went to contact the feelings, and I became acquainted with General Li's family a little, and learned that General Li had his fiancée with him, and he thought that he would get married when he came to Shule City, and this should be to build furniture for marriage."

He thought he had guessed and understood, and said with a long sigh: "A little disappointed, marriage is important, but as a man, of course it is urgent." But when he first came to Shule to take office, he should be an example for the officials, and he should at least pretend to be busy for a few days before planning for marriage. He does this to give people a sense of ...... Unreliable feeling. ”

"Wait and see, see him for a few more days." He immediately raised his head and instructed the maidservant beside him: "You go down and prepare a few congratulatory gifts for General Li, you want to get your hands on them, the precious brocade of the Central Plains, the fine linen of the big food, and the Tibetan food."

"Oh," the maid bowed her head, and the money was returned.

The prince stood up from the bed, looked at the flat-roofed houses in the city that were dyed golden in the dusk, and sighed faintly: "In the past, Li Du was in charge, and his friends worked together, and it was not easy to think of a good colleague, but I really thought too much.