"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 go 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.
If you are attacked, you can easily 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 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 only carry dry food for three days at most, and water must be collected along the way.
If you use horse-drawn carriages to transport, you must first have better roads. There must be water 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 not as good as the inland. There must be inns dozens of miles away in the inland that can replenish horse feed and bean feed. The waiter in the inn will clean the horses and give them 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 is indeed a problem. His strength is still very limited, but he cannot compare with Zhu Di. How can he have 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 by just going 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 are located 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 held Yang Fan's head between his hands and rubbed it while sighing.
.
The husband I have chosen is good in every way, but he always acts foolishly and says nonsense that has no meaning. Oh! I am so worried.
"You don't understand, it's not that the manpower is not good, it's that 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 with an alcohol stove. They poured 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, in addition to sails, there were only a few limited methods of human propulsion for ship propulsion: poles, oars, oars, and water wheels.
What is paddled by the arms on the side is the oar.
It is completely submerged in the water on the side or behind, and what stirs in the water is the oar.
The water wheel is driven by pedaling with your feet and driving the wooden wheels on the side of the ship through the transmission shaft.
When using a paddle to paddle water, the paddle is not in the water for more than half of the entire motion cycle. The paddle is in the water during the entire motion cycle, that is, the power of the paddle is used in 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 apply a small force on the handshake end of the oar and shake it at a small angle, coupled with 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 and the oar is pulled, it can also function as a rudder to turn the ship. In boatman's terminology, "pushing the oar" or "pushing the oar" means turning the oar sideways.
"Pull" and "push" mean 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 oar. At the same time, the water wheel's paddling efficiency is much higher than that of the oar and oar.
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 canal to drive a small propeller. Using human power to pedal, this is enough to move the canal 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 transformation does not need to destroy the structure of the ship, it is very simple and light in weight. The original load capacity will not be affected much. If the trial production is successful, all inland rivers in the future can solve the power problem in this way.
It also consumes no energy, and only consumes two steamed buns per 100 kilometers.
The girls were stunned when they heard this, so that's 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 made related accessories.
The next day, a small boat was remodeled for trial sailing.
This boat is eight meters long and one meter wide. It was originally punctured with bamboo poles. Yang Fan took a fancy to its length ratio, so that the length ratio of 8:1 would make it 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 Guda, Lu 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 ships forever.
