"An Sanxi conquered a small tribe on the grassland. Haha, he also became Nayan. That place is very important. It is located to the west outside the Zunhua Great Wall. If you want to develop to Monan Mongolia in the future, there are many people there. Value." Yang Fan said.
Lin Yueru quickly went to get the map and spread it flat on the floor. The three of them crawled on the floor, put their heads together, held a magnifying glass, and studied it carefully.
"Master, you see, this is actually the only way to Guihua City and the Ordos Plateau, but it is not on the main road, but in the south near the Great Wall. It not only threatens this main road, but also does not block the road. Under attack, it is very convenient to get our support." Xiao Niangpi analyzed seriously.
"It's just that transportation is a bit difficult. Going out from the Great Wall pass is difficult on mountain roads, and the transportation cost is too high." Lin Yueru frowned.
In fact, when the past dynasties were powerful, they were able to control the grasslands, but in the end they still used the Great Wall as the boundary because the grasslands could not grow food, were too dry, and had insufficient water resources, so they could only graze.
If there is a garrison, food needs to be transported from the interior, which is too laborious.
According to statistics, if a person can carry enough food on his back, it can only support him for fourteen days. This is the ultimate distance.
If a soldier wears armor and carries weapons, he can carry dry food for up to three days, and water must be provided along the way.
If carriage is used for transportation, there must first be better roads. There must be aquatic plants along the way.
Moreover, when horses carry heavy loads, they must be fed soybeans or grains. If they only eat grass, the horses will be useless after being transported for a long distance.
In this way, the maximum transportation distance does not exceed a month's journey. After all, the grassland is no better than the inland. There must be inns dozens of miles away in the inland that can replenish horse feed and bean feed. The waiter will clean the horse and give it a good rest.
Zhu Di, the founder of the Ming Dynasty, made five northern expeditions to Mongolia. His army was about 150,000, and the logistics and civilians used 500,000 people.
These people drove carriages to transport food and support his battle.
But this was not enough. He organized more than 400,000 additional donkeys. These donkeys could be ridden, carried materials, and killed for meat. This barely supported his logistics.
Yang Fan frowned. This was indeed a problem. His strength was still very limited and he could not compare with Zhu Di. How can there be an efficient transportation method?
"The most efficient transportation is water transportation. Can it be transported by water?" Yang said to himself, touching his chin.
Because from the map, the rivers in Zunhua all flow down from there, and you can get there as long as you go upstream.
Soon Yang Fan received eye rolls from Xiao Niangpi and Lin Yueru.
Both the Jiyuan Canal and the Grand Canal from Tianjin to Beijing were hauled up by trackers. These are more than 500 meters away from the waterway, and they are still in high mountains. You can show us one.
"Idiot, you can't row up the river with human power. These boats are very heavy." Xiao Niangpi couldn't bear it anymore, so the master stopped shouting. He clamped Yang Fan's head between his hands and rubbed it while sighing. .
The husband I chose was good at everything, but he always acted foolishly and said stupid things that didn't make sense. well! It's so sad.
"You don't understand. It's not that the manpower is not good, but the method is wrong." Yang Fan thought about it carefully and said.
"Do you know the principle of rowing with an oar?" Yang Fan asked.
The two little beauties shook their heads. At this time, others gathered around, kneeling and sitting around. They knew that the master was going to speak again.
Xiaoyu and Xiaohong went to the bar to get coffee equipment, ground coffee beans on site, and brewed coffee using an alcohol stove. Pour a cup of steaming cat poop coffee for the master and everyone.
Smelling the aroma of coffee brewed by the coffee pot and the body fragrance of a dozen girls around him, Yang Fan nodded with satisfaction and began to popularize ship propulsion technology to them.
In this era, apart from sails, there were only a few limited ways of using human power to propel ships. Pole, oar, scull, water wheel.
What is paddled by the arms on the side is the oar.
Completely submerged on the side or behind, the oars stirred in the water.
The water wheel is driven by pedaling with the feet and driving the wooden wheels on the side of the ship through the transmission shaft.
When paddling with a paddle, the paddle is out of the water for more than half of the entire movement cycle. The entire motion cycle of the oar is in the water, that is, the force of the oar is acted on the water, and the waste is far less than that of a paddle.
The operation method of the oar is very reasonable. It uses the principle of leverage. As long as you exert a small force on the handshake end of the oar and shake it at a small angle, plus the borrowing force of the oar rope, you can produce a large force on the water inlet end of the oar. force and increase its swing amplitude.
The oar can also replace the steering gear. If the angle of the oar is changed, it can also act as a rudder to turn the ship. "Pull the stern" and "push the stern" in boatman's terminology mean to "pull" and "push" the oar sideways to make the ship turn right or left.
The efficiency of the oar is at least twice that of the oar.
The water wheel is even more powerful, because the force of the lower limbs pedaling is much greater than the force of the upper limbs rowing and rocking the oars. At the same time, the paddling efficiency of water wheels is much higher than that of paddles and oars.
The propeller that is completely submerged in the water has the highest efficiency. It is lighter and simpler than the wheel, and it is completely submerged in the water and has the highest efficiency.
Yang Fan's idea is to install a bicycle-like device on both sides of the boat to drive a small propeller. Use human power to step on it, which is enough to move the boat upstream at a speed of about three knots.
A canoe is twenty meters long, with enough space to install twenty such devices on each side. Forty people can ride on it as a group, which is enough to realize autonomous navigation and eliminate the backward method of fiber pulling.
Moreover, this kind of modification does not need to destroy the structure of the ship, is very simple, and is light in weight. The original load capacity has little impact. If the trial production is successful, all inland rivers in the future can solve power problems in this way.
It doesn’t consume energy, just two steamed buns per 100 kilometers.
The girls were dumbfounded, so that was okay.
There are several women's bicycles in Yang Fan's backyard, which are scooters bought by Yao Guang.
She rode it for fun, and almost all the women in the backyard did it.
They knew the principle of this thing and could ride it, so it was not difficult to understand Yang Fan's idea.
Just as he was told, Yang Fan immediately ordered all five bicycles to be dismantled and had Xinghe Iron Works cast bronze propellers overnight. The blacksmith camp creates related accessories.
The next day a small boat was remodeled for trial sailing.
The boat is eight meters long and one meter wide. It turned out that bamboo poles were used to punt the boat. Yang Fan took a fancy to its length-to-length ratio, so the 8:1 length-to-length ratio would be very fast.
Two sets of propellers are installed on each side, one at the tail, and a steering gear.
Seeing the new ship being launched into the water for trial sea trials, Zhang Goda, Lv Dan, Mo Zhui and others rushed to become trial pilots. These people have always been enthusiastic supporters of the master's new invention.
They all understand that the master is the reincarnation of Xingjun. He is very capable and can often invent things that are not available in this world.
If this succeeds, they will also go down in history as propeller boats.
