While the farmers were busy raising seedlings, the railroad tracks began to be laid in the eup. The spacing is the six feet stipulated by the First Emperor when he 'cars are on the same track'.

It was just a track for the chariot building to travel, but Liu Bei Fu was very happy, why not build an embedded concave track along the street to drive the public carriage?

A railroad carriage refers to a means of transportation that relies on horses to pull vehicles and wheels to roll on steel tracks. It can carry several times as many passengers and cargo as ordinary horse-drawn carriages. Invented by later generations of the British. The first to propose embedding a carriage track into the road was the French. Before the advent of steam locomotives, horse-drawn railcars were one of the most powerful vehicles on land.

The railcar is a two-horse carriage with front and rear doors for passengers to get on and off.

Lousang is narrow from north to south and long from east to west. From the east to the west, there are five miles away. It's not long, it's not short, it's okay on weekdays, but if it rains or snows, it's quite laborious to walk. Wouldn't it be wonderful to have a station every other mile!

So he found Su Bo and told him what he was thinking.

Su Bo nodded and said, "It's feasible." It's just that there are few owners, and the people of Qi are not allowed to take the carriage. If it is only for officials and students in the city to travel, a taxi carriage is sufficient. Why reinvent it?

Yes.

Families are not allowed to ride in horse-drawn carriages. Wait, don't you just pull a cart without a horse! The ox cart is too slow, and the donkey cart capacity is low. Liu Bei had an idea: How about mules and horses?

Suber nodded: The mule cart is doable. However, the mules and horses pulling the cart must be strong and powerful.

Genes look at parents.

Stallions with mixed mules and horses can be used to pull the horses with Xianbei. The words of the she-donkey......

Liu Bei found Su Shuang.

Su Shuang said, why not use the Bohai Black Donkey. Its body is well-proportioned and strong, with well-developed muscles and muscles. The head and neck are high, the face is straight and the mouth is straight, the eyes are large, the back and waist are straight, the ribs are rounded, the abdomen is full, and the joints are obvious. Breeding with Xianbei heavy horses and Bohai black donkeys can produce large mules and horses!

This ordered Zhang Shiping and the sect to sell Bohai black donkeys together. Wait for the Bohai female donkey to arrive with the boat. I saw that its whole body was black in color, without any miscellaneous hair, its body was tall and strong, its limbs were heavy, its hooves were low and large, its body was heavy, its chest was wide and deep, and it could be called the 'heavy donkey' at the moment. The quality of the horses and mules is particularly good.

The design of the bus building car was also released.

Similar to a boat. It is divided into two floors, connected by ladders, and can take hundreds of people. Therefore, it is also called: the boat.

Liu Bei personally tested on the track of Xilinyi, two Xianbei heavy horse-drawn carriages, if you don't stop, five miles of long street, half a pillar of incense can be completed in time.

Just wait for the mules and horses to come out of the slaughter, and then they can drive in the city.

Forging and laying rails are time-consuming. It will take time for the mules and horses to be slaughtered. Even the technical design of the boat car will take a lot of time to perfect. There is no hurry. Take it easy.

At present, the iron smelting industry is very developed. Large-scale iron-making blast furnace can produce more than 60 jun (1 ton) of steel per day. There were three large-scale iron-smelting centers: Anyang, Gongxian and Nanyang. Nanyang is located on the north-south boundary, and it is the passage between the Yangtze River, the Han River and the Huai River and Guanzhong. Therefore, all industrial and commercial industries are very developed, especially the iron smelting industry is quite prosperous. At that time, Nanyang County had a population of more than 2.4 million, which was the highest among all counties in the country. The circumference of the county seat is more than 70 miles. It is known as the southern capital. The development of industry and commerce reached its peak, and it even became the two largest central cities in the country, along with Luoyang, Kyoto.

The reason why Liu Bei knows Nanyang so well. In addition to people such as Huang Zhong and Guo Zhi, they are all from Nanyang. The blacksmith shop also employed many good family workers from Nanyang.

Anyway, there was a strange thing recently.

This matter also needs to start with Beihai Yilong. Guan Ning and the three are interns and serve as postmen in the house. With a good salary, I wanted to build a sword. A gentleman should be a sword. "The Book of Rites: Yuzao" uploads: "must wear a sword", which means that you must wear a sword. "The Book of Rites: Shaoyi" also contains: "Watching the gentleman's clothes, wearing swords, riding horses, and Fuja". This means looking at the gentleman's clothing, swords, chariots and horses, and not talking about their prices.

In other words, the price must be there, regardless of the price.

So he went to the blacksmith shop of the third uncle's house to find good work to make a sword. There are good craftsmen, everyone is called 'Xia Lao', and the third uncle hired him from Nanyang. Discussing the sword with the three of them is quite talented. The crowd was amazed. The matter should have been abandoned. Unexpectedly, after Tian Hua and the others heard about it, they went to have a look. Everyone asks, and Xia Lao will answer. Tian Hua was overjoyed. This invited Xia Lao to go to the school to discuss with Beihai Yilong.

As a result, a dragon in Beihai, who had no opponent in the academy, actually surrendered and admitted defeat!

There was an uproar in the academic world.

This mysterious Xia Lao returned to the blacksmith shop afterwards and was obsessed with striking iron all day long.

When the third uncle learned about it, he hurriedly came to report. Liu Bei knew that he must be a hermit. After thinking about it again, he handed over a private jade plate to the third uncle and gave it to him. It is also rumored that when you want to come and see, you will see yourself.

Xia Lao did not refuse. Take it for a long time.

After the summer heat, the heat gradually rises.

The building is high-rise and heavy, and it has its own wind. Five-story study with wide open windows and doors. Through the screen window, overlooking the emerald red and thick green, pedestrians are weaving. A vivid scene.

The Hou Mansion lives in the southeast. This mansion is mostly the residence of the Liu clan and the retainers. Every inch of land is valuable. All of them are five-storey buildings slightly lower than the Hou Mansion. It's magnificent. Now even the old mulberry in front of the door is also cared for by a special person.

This is the symbol of the Hou Mansion. Whenever someone asks for directions, everyone answers: "Next to the Wuzhang Mulberry in the East Que."

Liu Bei is designing the suspension and brakes of the boat. As far as he knows, there are two types of shocks, leaf spring and spring. The spring is easy to do, but unfortunately if there is only a spring, after the vehicle is bumped, the body will keep jumping up and down like a spring toy, so it is necessary to cooperate with the damping cylinder to control the effect of spring compression and rebound.

This one is more complicated. Leaf spring suspension is much simpler.

The leaf spring section is a rectangular rectangular arc-shaped spring steel. For very heavy vehicles, leaf springs can be made from multiple blades that become progressively shorter on top of each other.

It's not hard to build.

Liu Bei drew a sketch, handed it over to a good craftsman to build according to the same, and then slowly improved it in practice.

The design of the brakes is painstaking. Liu Bei referred to his own carriage and found that the carriage at this time did not have an independent braking system.

The chariot and the horse were connected by two straight logs called 'Yuan'. It is a hard connection. Just stop the horse and stop. At this time, the carriage traveled no more than seventy miles a day. It's not that fast, so the brakes are useless. However, if it is replaced with two upper and lower levels, the boat car carrying 100 people will travel on the railroad tracks. The inertia is large and the resistance is small, and if there is no braking system, there will be an accident.

How to stop the vehicle as soon as possible.

Liu Bei thought of many ways, but the effect was not good.

So I asked Su Bo to ask.

Su Bo thought about it for a while, and then said: Why don't you use gear transmission?

Liu Bei was stunned: Gear transmission?

Su Bo nodded and said, "Exactly." If the power of a mule and horse is compared to the power of flowing water, can a boat be compared to a water drain?

Liu Bei suddenly opened: The mule pulls the force to drive the gears, and the gears are then transmitted to the axle to drive the vehicle! However, how to park?

Suber drew something on the artboard: ratchet gears can be used for braking to prevent the axles from reversing.

Liu Bei was stunned. The so-called 'ratchet gear' is the ratchet of the later generations. Pushed by the pawls, it can only rotate in one direction, not the other way around!

Suber said: Transmission gears, can also be used herringbone gears.

Herringbone gear, high degree of coincidence, small axial load, high bearing capacity, stable work, can greatly extend the service life of the bearing.

What else can Liu Bei say! In this era, there is such a powerful gear system!

Add in gears and it's easy.

Ratchet gears are used for braking, and herringbone gears are used for transmission. Perfectly solve the start-stop problem.

Referring to the gear sets on the taxi carriage and the water row, Suber and many of his skilled craftsmen quickly designed a complete gear system for the boat.