In the era without quinine, once you get malaria, the chances of patients surviving are rare. Facing death, no one can calm down, and they can only be self-ansthesia. Liu Wenbing’s self-ansthesia method is to strive to perfect the “meteor bomb” he created.

Not to mention Liu Wenbing, the other two Mafen and Tang Kai who were suffering from malaria learned that Liu Wenbing was thinking about the "Meteor Bomb" and they also agreed that this way to find trouble is the best anesthetic to divert fear. So they were not willing to be lonely, and were racing against time, racing against time, taking out the spirit of "release the last little light and heat in life" and vowing to make the final contribution to the progress of mankind.

The two found something worthy of common attention, but what is quite ridiculous is that they had huge differences.

At the beginning, Tang Kai was ill in bed. After a lot of thoughts, he realized that this trip was originally for the purpose of repairing Kra Road. Then Tang Kai thought, wouldn't it be best if there was a way to build a railway?

OK, the railway is good, but it is indeed too expensive. Stop saying that I don’t have the money to build a railway. Even if I have money, where can I buy so much iron? Not to mention buying railway tracks.

However, living people can't be suffocated to death by peeing, right? Tang Kai thought of a solution. Although we can't afford to build a railway, we can try the rail transit.

Tang Kai once visited an exhibition on the history of rail transit held by a foreigner. Foreigners could really collect it. They actually collected the wooden tracks from the 17th century, which made Tang Kai lucky to see the antique tracks from hundreds of years ago.

Wooden tracks were first used in mines. Mining owners who suffered from mine transportation were always pursuing the lowest cost and maximum output, so there were pioneers who used wooden tracks to transport ore.

As early as the mid-16th century, the steel industry in Britain emerged and mining was carried out everywhere. However, the transportation of mines was still very backward at that time. Iron ore was pulled by horses and backs, and labor efficiency was very low. In response, a capitalist who was active and motivated and motivated came up with a way to transport more iron ore: he ordered people to lay two logs flat from the mountain to the slope, so that the distance between them was the same, one by one to the bottom of the mountain. When the chariot filled with ore was sliding down the two logs, the people on the mountain shouted loudly: "Note, the car is coming." When the person at the foot of the mountain received the mine cart, he also replied loudly: The car is here, okay! After unloading the ore, the empty truck was then pulled up the mountain by mules and horses, so the next cycle began.

This is the early wood track.

Science and technology are the primary productive forces. Using wooden tracks and getting a few track trucks, the efficiency of transporting ores has indeed been greatly improved. Later, because the wood is not wear-resistant, some people have improved on this basis and further developed a track with wood-intact iron sheets. It must be said that humans are still very powerful in fighting against the sky and the earth.

However, this is not the earliest rail transit. The earliest rail transit was created by ancient Greece. Ancient Greece had rail transit in BC. The ancient Greeks carved grooves on stones and built them on the avenues of cities. In this way, four-wheelers with manpower or horse-drawn can pass quickly on the rails. Not only is it fast, but it can also ensure traffic order.

The disadvantage of wooden tracks is very obvious, that is, they wear quickly. Once worn, safety accidents will occur one after another. This is the conclusion that the ancients have drawn. Tang Kai believes that compared to wooden tracks, the kind of track in ancient Greece is worth a try.

So Tang Kai solemnly proposed to Han Huanzhang that the construction of Kra Road could be completely built into ancient Greek-style grooved rails, and then rapid transportation between the east and west sides could be opened.

Ma Fen knew about this - there was no way to know, Ma Fen lived next to Tang Kai. The log building was good, but it was not soundproof. Ma Fen expressed great contempt when he learned that Tang Kai had such a problem.

"Han Huanzhang, don't be fooled by Tang Kai. Human history has proven that there are only two options for building roads. One is to build asphalt roads and cement roads. The other is to build railways. The retro rail transit is purely a waste, a detour, or a misstep. Do you know if you have time? If you have time, study how to build a road. You see, I have written some ideas on my notebook about building a road."

Ma Fen was worried that he would die. Han Huanzhang, an unprofound artist, might really build "Greek rails", which would only ruin the reputation of the time traveler. It would be better to build asphalt and cement roads. Of course, it would be better to build railways. At least it would be necessary to build a good sand and stone road.

Han Huanzhang has always been a little afraid of Ma Fen. Facing Ma Fen's sharp gaze, Han Huanzhang's eyes were a little wandering. However, Han Huanzhang had a natural hobby for some non-mainstream things, so he combined the reason for Tang Kai's "Greek Rail" with his own understanding, and said the reason:

"Ma, look, the asphalt road you mentioned is very small in the world now. It can be said that it can be used on shipbuilding. As for cement, Tang Kai has calculated the matter. Cement roads must be built at least four meters wide. The rural roads in the 21st century are four meters wide, and there is also a barge at a distance to get two barges. A road with a width of 20 cm thick is 0.8 cubic meters, not steel barges, and one kilometer is 800 cubic meters of concrete. How much cement is needed? One kilometer is almost 300 tons of cement is gone. Here in the Isthmus, the shortest straight distance of the east and west coasts is 56 kilometers, but the road construction has slopes, and it is necessary to turn and really build it. 70 kilometers is not much. If you want to repair cement roads, you have to use at least 20,000 tons of cement. Can you afford it?"

After calculating the accounts like this, it seems that it is really impossible to build asphalt roads and cement roads. It has been investigated before. There is a trench deep into the land on the west coast of the Isthmus of Kra. It is the closest to the east coast from this trench, but there are hills in the middle. The road that was built in the end is not 70 kilometers and at least 65 kilometers.

"It doesn't need to be 20 cm thick. I think 10 cm is enough. If the carriage is overwhelmed by this year, it will only have one or two tons of loads, and ten thousand tons of cement is enough."

"Master, if a ton of cement is transported here, it costs about 15 taels of silver, 1.5 million taels of silver, and sand and stone labor. I'm afraid that two million taels of silver can't be beaten."

When Ma Fen heard this, it was simply an astronomical figure, and it seemed that it would be impossible to repair cement roads.

"Then let's build a simple sand and stone road first. You haven't seen the simple roads built in Yunnan and Sichuan during the War of Resistance Against Japan. That road can still transport a large amount of arms and materials!"

"Ma, Tang Kai's rail plan is actually pretty good. If you don't have more than 2 and a half tons of cement per kilometer, you can build this groove rail road. One hundred and seventy or eighty tons of cement. This cost can be affordable. After completion, it will definitely be better than a simple sand and stone road. The rainfall here is really a bit terrifying. There is no guarantee of the passage of sand and stone roads in the mud. I think it's better to be 'Greek rail'. Moreover, according to Guo Huazhang, the Qin Dynasty had 'cars same track'. Do you know why 'cars same track'? Hehe! In fact, the Qin Dynasty was almost rail transit."

"No, what kind of rail transit does the Qin Dynasty have?"

"Tell you, it was dirt roads in the Qin Dynasty. After the wheels were repeatedly crushed, two hard-ground lanes appeared. Isn't this equivalent to having rails? Then, with this rail, transportation efficiency is improved and vehicle wear and consumption is reduced, so Qin Shihuang must order the 'cars and rails'."

Recently, Guo Huazhang and Han Huanzhang have been very close. Unexpectedly, Guo Huazhang found the historical reasons for supporting "rail transportation", which made Han Huanzhang even more affectionate with Guo Huanzhang. Guo Huazhang has a good attitude towards leading troops and is also a few cultural people. He was very speculative with Han Huanzhang for a while.

"The dirt roads in the Qin Dynasty were so good, which doesn't it just mean that the gravel roads were enough to meet the transportation of horse-drawn carriages."

Ma Fen is arguing about the truth. Han Huanzhang frowned and thought to himself that the Northern China where Qin Shihuang is located is not like the Malay Peninsula during the continuous rainy season. Guo Huazhang mentioned the road conditions of the Song Dynasty. Compared with the cement roads in the Kaohsiung Special Administrative Region, the dirt roads and gravel roads in the Song Dynasty are definitely nightmares for carriage transporters. Therefore, in the Song Dynasty, the most effective means of transportation is ship transportation.

Tang Kai is vigorously advancing the rail transit plan, but Ma Fen is strongly opposed. Wang Feng expressed doubts about the retro rail transit, and Liu Wenbing was the same, feeling that the retro style has no future.

However, Han Huanzhang has already arranged for someone to try to build a section of "retro rail" according to Tang Kai's design. This section of "retro rail" is made of cement. Of course, the design of the rail is very different from the "Greek rail". From the cross-section, the rail is equivalent to the shape of angle steel. The rails are opposite to each other, and the protruding part is on the inner side. The wheel rim is limited by the convex part and can only rotate on the cement section spread flat on the road surface. However, although there are differences in form, the principle is no different from the "Greek rail".

On this day, Liu Wenbing's condition suddenly took a sharp turn. After foaming at the mouth, he became unconscious.

Han Huanzhang and Wang Feng both rushed to Liu Wenbing's house and prepared to say goodbye to Liu Wenbing. The two of them walked out and walked in later times, and their mood was particularly heavy.

Liu Wenbing finally woke up. When he woke up, he saw Han Huanzhang and Wang Feng, he said disheartenedly:

"I can't do it anymore! I really can't bear to leave the 12th century, and I should have made a difference."

"No! No! You see, your spirit is much better! It's okay, just hold on for a while and you'll get over."

Faced with Wang Feng's consolation, Liu Wenbing shook his head and said:

"I know this is a rebirth, and my energy has been drained. I know, but I'm reluctant to let it go."

Seeing that Han Huanzhang and Wang Feng's eyes began to get wet, Liu Wenbing struggled and said:

"Well, Lao Han, don't do any 'retro rail transit', there's no future."

Facing the dying person, Han Huanzhang had nodded. Wang Feng couldn't help but shed tears at this time, but realized that Liu Wenbing was not dead yet, so he quickly wiped his eyes and pretended to laugh:

"Yes, yes, if we want to repair the cement road, we are not short of money."

Liu Wenbing said good words with satisfaction, and then fell into a coma again.

However, Liu Wenbing did not die in the end, but recovered a little slower, while Ma Fen and Tang Kai got better quickly. In fact, this time travel allowed all time travelers to undergo a powerful electromagnetic baptism, and their physical fitness improved greatly, so they could withstand this malaria. For the other patients, only Bai Er, a strong guy, took over.

Unexpectedly, after Liu Wenbing escaped from the sea of ​​suffering, his attitude changed by 180 degrees, from strongly opposing "retro rail transit" to spare no effort to support him. According to him, this was only when he understood the truth during a meditation against the god of death.
Chapter completed!